JP5887420B2 - Metal foil with carrier - Google Patents

Description

  The present invention relates to a metal foil with a carrier. More specifically, the present invention relates to a metal foil with a carrier used in the production of a single-sided or two-layer multilayer board or an ultra-thin coreless substrate used for a printed wiring board.

  In general, a printed wiring board uses, as a basic constituent material, a dielectric material called “prepreg” obtained by impregnating a base material such as a synthetic resin plate, a glass plate, a glass nonwoven fabric, and paper with a synthetic resin. . Further, a sheet such as copper or copper alloy foil having electrical conductivity is bonded to the side facing the prepreg. The laminated body thus assembled is generally called a CCL (Copper Clad Laminate) material. The surface of the copper foil in contact with the prepreg is usually a mat surface in order to increase the bonding strength. A foil made of aluminum, nickel, zinc or the like may be used instead of the copper or copper alloy foil. Their thickness is about 5 to 200 μm. This commonly used CCL (Copper Clad Laminate) material is shown in FIG.

  Patent Document 1 proposes a metal foil with a carrier composed of a synthetic resin plate-shaped carrier and a metal foil that is mechanically peelably adhered to at least one surface of the carrier. Describes that it can be used for the assembly of printed wiring boards. And it was shown that the peel strength between the plate-like carrier and the metal foil is desirably 1 gf / cm to 1 kgf / cm. According to the metal foil with a carrier, since the copper foil is supported over the entire surface by the synthetic resin, generation of wrinkles on the copper foil during lamination can be prevented. In addition, since the metal foil with carrier is in close contact with the synthetic resin without gaps, when the surface of the metal foil is plated or etched, it can be put into the chemical solution for plating or etching. . Furthermore, since the linear expansion coefficient of the synthetic resin is at the same level as the copper foil that is a constituent material of the substrate and the prepreg after polymerization, the circuit is not misaligned, resulting in fewer defective products, It has the outstanding effect that a yield can be improved.

JP 2009-272589 A JP 2000-196207 A

  The metal foil with carrier described in Patent Document 1 is an epoch-making invention that greatly contributes to the reduction of manufacturing cost by simplifying the manufacturing process of printed circuit boards and increasing the yield, but the peel strength between the plate-like carrier and the metal foil. There is still room for further study on the optimization and means of the above. In particular, a remarkable problem for the inventor is that the peel strength between the plate-like carrier and the metal foil becomes too high depending on the material of the plate-like carrier, and means for easily adjusting the peel strength is provided. It is desirable. In addition, the conventional metal foil with a carrier has a corner portion that collides with another member during handling, and the carrier and the metal foil may be peeled off due to an external force applied at that time, and this is also desired to be improved. ing. Accordingly, the present invention provides a metal foil with a carrier in which the peel strength between the resin plate carrier and the metal foil is adjusted, and the carrier and the metal foil are also prevented from being peeled off during transportation or processing (during handling). The issue is to provide.

  As a result of earnestly examining the method of adjusting the peel strength between the resin plate and the metal foil, the present inventors, as a result of stacking the carrier and the metal foil prior to bonding the resin plate and the metal foil, As a result of intensive studies, it was found that by overlapping metal foils having an area smaller than the area occupied by the carrier, it was difficult to peel off only by an external force generated by colliding with other members after completing both, and the present invention was completed. .

That is, the present invention is as follows.
(1) A metal foil with a carrier made of a resin-made plate-like carrier and a metal foil that is detachably adhered to at least one surface of the carrier,
A metal foil with a carrier having a shape in which the metal foil and the plate-like carrier have the same shape and have no corner (vertex) having an inner angle of 90 degrees or less when seen in a plan view.
(2) The metal foil with a carrier according to (1),
The metal foil with a carrier which is the shape where the said metal foil and the said plate-shaped carrier were the same shape when it planarly viewed, and were enclosed by the straight line and the curve.
(3) The metal foil with a carrier according to (2),
A metal foil with a carrier, wherein the metal foil and the plate-like carrier have the same shape when viewed in plan, and the curve is an arc or an elliptical arc.
(4) The metal foil with a carrier according to (1),
A metal foil with a carrier, wherein the metal foil and the plate-like carrier have the same shape when viewed in a plan view, and all the internal angles are polygonal shapes having an angle larger than 90 degrees.
(5) The metal foil with a carrier according to (4),
The metal foil with a carrier which is a convex polygonal shape in which the metal foil and the plate-like carrier have the same shape when viewed in a plane, and all inner angles are larger than 90 degrees and smaller than 180 degrees.
(6) The metal foil with a carrier according to (1),
The metal foil with a carrier which is the shape where the said metal foil and the said plate-shaped carrier were the same shape when it planarly viewed, and were only enclosed by the curve.
(7) The metal foil with a carrier according to any one of (1) to (6), wherein the peel strength between the plate-like carrier and the metal foil is 10 gf / cm or more and 200 gf / cm or less.
(8) The metal foil with a carrier according to any one of (1) to (7), wherein the resin-made plate-like carrier contains a thermosetting resin.
(9) The metal foil with a carrier according to any one of (1) to (7), wherein the resinous plate-like carrier is a prepreg.
(10) The metal foil with a carrier according to (8) or (9), wherein the plate-like carrier has a glass transition temperature Tg of 120 to 320 ° C.
(11) The metal foil with a carrier according to any one of (1) to (10), wherein a ten-point average roughness (Rz jis) of a side surface in contact with the carrier of the metal foil is 3.5 μm or less.
(12) The ten-point average roughness (Rz jis) of the surface of the metal foil that is not in contact with the carrier is 0.4 μm or more and 10.0 μm or less, according to any one of (1) to (11). Metal foil with carrier.
(13) The metal foil with a carrier according to any one of (1) to (12), wherein the thickness of the metal foil is 1 μm or more and 400 μm or less.
(14) The metal foil with a carrier according to any one of (1) to (13), wherein the thickness of the plate-like carrier is 5 μm or more and 1000 μm or less.
(15) With the carrier according to any one of (1) to (14), about 1 to 10 holes having a diameter of about 0.01 mm to 10 mm are provided in a region to be cut and removed when viewed in plan. Metal foil.
(16) The metal foil with a carrier according to any one of (1) to (15), wherein a plate-like carrier and a metal foil are bonded together using a release agent.
(17) The mold release agent has the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
The metal foil with a carrier according to (16), wherein the silane compound, a hydrolysis product thereof, and a condensate of the hydrolysis product are used singly or in combination.
(18) The metal foil with a carrier according to (16), wherein the release agent comprises a compound having two or less mercapto groups in the molecule.
(19) The mold release agent has the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
The metal foil with a carrier according to (16), wherein the aluminate compound, the titanate compound, the zirconate compound, the hydrolysis products thereof, and the condensates of the hydrolysis products are used singly or in combination.
(20) The plate-like carrier and the metal foil are bonded together using a resin coating film composed of silicone and any one or a plurality of resins selected from epoxy resins, melamine resins and fluororesins. The metal foil with a carrier according to any one of (1) to (15).
(21) The peel strength between the metal foil and the plate carrier after heating at 220 ° C. for 3 hours, 6 hours or 9 hours is 10 gf / cm or more and 200 gf / cm or less (1) to (20) Metal foil with a carrier in any one of.
(22) The metal foil with a carrier according to any one of (1) to (22), wherein the metal foil is a copper foil.
(23) On the surface of the metal foil having a shape without an angle (vertex) having an internal angle of 90 degrees or less when viewed in plan, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
The metal foil for coreless multilayer printed wiring boards which has the silane compound shown in 1 above, its hydrolysis product, and the condensate of this hydrolysis product individually or in combination.
(24) A coreless multilayer printed wiring board having a compound having two or less mercapto groups in the molecule on the surface of a metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less when viewed in plan Metal foil.
(25) On the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less when viewed in plan, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A metal foil for a coreless multilayer printed wiring board having the aluminate compound, titanate compound, zirconate compound, hydrolyzed products thereof, and condensates of the hydrolyzed products alone or in combination.
(26) Any one selected from silicone, epoxy-based resin, melamine-based resin, and fluororesin on the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less when viewed in plan A metal foil for a coreless multilayer printed wiring board having a resin coating film composed of one or a plurality of resins.
(27) Chromate treatment is performed on the surface of the metal foil on the side on which the compound or resin coating film according to any one of (23) to (26) is applied before the compound or resin coating film is applied. A metal foil for a coreless multilayer printed wiring board.
(28) A metal foil for a coreless multilayer printed wiring board according to any one of (23) to (27),
A coreless multilayer printed wiring having a ten-point average roughness (Rz jis) of the surface on which the compound or resin coating film according to any one of (23) to (26) is applied is 3.5 μm or less. Metal foil for plates.
(29) A metal foil for a coreless multilayer printed wiring board according to any one of (23) to (28),
The ten-point average roughness (Rz jis) of the surface on which the compound or resin coating film according to any one of (23) to (26) of the metal foil does not act is 0.4 μm or more and 10.0 μm or less. Metal foil for coreless multilayer printed wiring boards.
(30) The metal foil for coreless multilayer printed wiring boards according to any one of (23) to (29), wherein the metal foil is a copper foil.
(31) On a surface of a metal foil having a shape having no angle (vertex) having an internal angle of 90 degrees or less when viewed in plan, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
A metal foil having a silane compound, a hydrolysis product thereof, and a condensate of the hydrolysis product alone or in combination, wherein the resin plate carrier is adhered to the surface in a peelable manner. Metal foil used in
(32) A metal foil having a compound having two or less mercapto groups in the molecule on the surface of the metal foil having a shape having no inner angle (vertex) having an inner angle of 90 degrees or less when viewed in plan. A metal foil used for the purpose of allowing a resin plate carrier to be peeled and adhered to the surface.
(33) On the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less when seen in a plan view, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A metal foil having an aluminate compound, a titanate compound, a zirconate compound, a hydrolysis product thereof, a condensate of the hydrolysis product, or a combination of a plurality of the hydrolysis products. Metal foil used for applications in which the carrier is peelably adhered.
(34) Any one selected from silicone, an epoxy resin, a melamine resin, and a fluororesin on the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less when seen in a plan view A metal foil having a resin coating film composed of one or a plurality of resins, and used for the purpose of releasably adhering a resin plate carrier on the surface.
(35) The metal foil according to any one of (31) to (34),
Before the compound or resin coating film is allowed to act on the surface of the metal foil on which the compound or resin coating film according to any one of (31) to (34) is allowed to act, chromate treatment is performed. A metal foil characterized by.
(36) The metal foil according to any one of (31) to (35),
A metal foil having a ten-point average roughness (Rz jis) of 3.5 μm or less on a surface on which the compound or resin coating film according to any one of claims 28 to 33 is applied.
(37) The metal foil for printed wiring board according to any one of (31) to (36), wherein the metal foil is a copper foil.
(38) On at least one surface of a resinous plate-like carrier having a shape having no internal angle (vertex) having an internal angle of 90 degrees or less when viewed in plan, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
A plate-like carrier having a silane compound, a hydrolysis product thereof, and a condensate of the hydrolysis product alone or in combination.
(39) A compound having two or less mercapto groups in the molecule on at least one surface of a resinous plate-like carrier having an inner angle of 90 degrees or less (vertex) when viewed in plan A plate-like carrier.
(40) On at least one surface of a resinous plate-like carrier having a shape with no internal angle (vertex) having an internal angle of 90 degrees or less when viewed in plan, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A plate carrier having an aluminate compound, a titanate compound, a zirconate compound, a hydrolysis product thereof, and a condensate of the hydrolysis product, either alone or in combination.
(41) Silicone, an epoxy resin, a melamine resin, and fluorine are formed on at least one surface of a resinous plate-like carrier having an angle (vertex) having an inner angle of 90 degrees or less when viewed in plan. A plate-like carrier having a resin coating film composed of any one or a plurality of resins selected from resins.
(42) On at least one surface of a resinous plate-like carrier having a shape having no angle (vertex) having an internal angle of 90 degrees or less when seen in a plan view, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
Is a plate-like carrier having a silane compound, a hydrolysis product thereof, or a condensate of the hydrolysis product alone or in combination, and is used for the purpose of releasably adhering a metal foil on the surface. Plate carrier.
(43) A compound having two or less mercapto groups in the molecule on at least one surface of a resinous plate-like carrier having an inner angle of 90 degrees or less (vertex) when viewed in plan It is a plate-shaped carrier which is used, It is a plate-shaped carrier used for the use which adheres metal foil in the said surface so that peeling is possible.
(44) On at least one surface of the resinous plate-like carrier having a shape having no internal angle (vertex) having an internal angle of 90 degrees or less when viewed in plan, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A plate-like carrier having an aluminate compound, a titanate compound, a zirconate compound, a hydrolysis product thereof, or a condensate of the hydrolysis product as shown in FIG. A plate-like carrier used for close contact.
(45) Silicone, an epoxy resin, a melamine resin, and fluorine on at least one surface of a resin-made plate-like carrier having an inner angle of 90 degrees or less (vertex) when viewed in plan A plate-like carrier having a resin coating film composed of any one or a plurality of resins selected from resins, which is used for applications in which a metal foil is peelably adhered on the surface.
(46) A resin is laminated on at least one metal foil side of the metal foil with a carrier according to any one of (1) to (22), and then the resin or the metal foil is repeatedly laminated one or more times. A method for producing a multilayer metal-clad laminate comprising:
(47) A resin is laminated on the metal foil side of the metal foil with a carrier according to any one of (1) to (22), and then a resin, a single-sided or double-sided metal-clad laminate, and any of (1) to (22) A method for producing a multilayer metal-clad laminate comprising the above-described metal foil with a carrier, a laminate obtained by laminating a metal foil on the surface of a resin, or laminating a metal foil repeatedly one or more times.
(48) In the method for producing a multilayer metal-clad laminate according to (46) or (47), the laminate surface of the plate-like carrier and metal foil in the metal foil with carrier or the resin and metal foil in the laminate A method for producing a multilayer metal-clad laminate comprising a step of cutting at a laminate surface.
(49) The method for producing a multilayer metal-clad laminate in the production method according to (46) or (47), further comprising a step of peeling and separating the plate-like carrier of the metal foil with carrier and the metal foil.
(50) In the manufacturing method according to (48), the step of separating the plate-like carrier and the metal foil of the metal foil with a carrier after cutting and separating the resin or the metal foil in the laminate after the cutting The manufacturing method of the multilayer metal-clad laminated board which further includes the process of peeling and isolate | separating.
(51) The method for producing a multilayer metal-clad laminate comprising the step of removing a part or all of the separated and separated metal foil by etching in the production method according to (49) or (50).
(52) A multilayer metal-clad laminate obtained by the production method according to any one of (46) to (51).
(53) A method for manufacturing a buildup substrate, comprising a step of forming one or more buildup wiring layers on the metal foil side of the metal foil with a carrier according to any one of (1) to (22).
(54) The buildup wiring layer manufacturing method according to (53), wherein the buildup wiring layer is formed using at least one of a subtractive method, a full additive method, and a semi-additive method.
(55) A resin is laminated on the metal foil side of the metal foil with a carrier according to any one of (1) to (22), and then a resin, a single-sided or double-sided wiring board, a single-sided or double-sided metal-clad laminate, (1) The metal foil with a carrier in any one of-(22), the laminated body which laminated | stacked metal foil on the surface of resin, or the manufacturing method of the buildup board | substrate including repeatedly laminating | stacking metal foil once or more.
(56) In the method for manufacturing a build-up board according to (55), a single-sided or double-sided wiring board, a single-sided or double-sided metal-clad laminate, a metal foil of a metal foil with a carrier, a plate-like carrier of a metal foil with a carrier, or a laminate The manufacturing method of the buildup board | substrate which further includes the process of drilling a hole in the metal foil of this, a plate-shaped carrier of a laminated body, metal foil, or resin, and conducting conductive plating on the side surface and bottom face of the said hole.
(57) In the method for manufacturing a buildup board according to any one of (55) and (56), a metal foil constituting the single-sided or double-sided wiring board, a metal foil constituting a single-sided or double-sided metal-clad laminate, and The manufacturing method of the buildup board | substrate which further includes performing the process of forming wiring in at least one of the metal foil which comprises metal foil with a carrier, the metal foil which comprises a laminated body, or metal foil once or more.
(58) A metal foil is laminated on the carrier side of the metal foil with a carrier according to any one of (1) to (22), or on one side of a resin, wherein a metal foil is adhered to one side on the surface on which the wiring is formed. The manufacturing method of the buildup board | substrate in any one of (55)-(57) which further includes the process of making the resin side of the laminated body contacted, and laminating | stacking.
(59) A metal foil with a carrier according to any one of (1) to (22), wherein a resin is laminated on a surface on which wiring is formed, and a metal foil is adhered to both surfaces of the resin, or both surfaces of the resin The manufacturing method of the buildup board | substrate in any one of (55)-(57) which further includes the process of making the laminated body which laminated | stacked metal foil on and laminating | stacking.
(60) The method for manufacturing a buildup substrate according to any one of (55) to (59), wherein at least one of the resins is a prepreg.
(61) With respect to the build-up substrate obtained by the method according to any one of (53) to (60), a laminate surface of the plate-like carrier and metal foil in the metal foil with carrier or a resin in the laminate Manufacturing method of the buildup wiring board including the process cut | disconnected in the laminated surface of a metal foil.
(62) The method further includes a step of separating and separating the plate-like carrier and the metal foil of the metal foil with carrier from the build-up substrate obtained by the method according to any one of (53) to (60). Manufacturing method of build-up wiring board.
(63) In the manufacturing method according to (61), the step of peeling and separating the plate-like carrier and the metal foil of the metal foil with a carrier after cutting or the resin and the metal foil in the laminate after the cutting The manufacturing method of the buildup wiring board which further includes the process of peeling and isolate | separating.
(64) In the buildup wiring board manufacturing method according to (62) or (63), the buildup wiring board further includes a step of removing a part or all of the metal foil adhered to the plate carrier by etching. Manufacturing method.
(65) A build-up wiring board obtained by the method according to any one of (61) to (64).
(66) A method for producing a printed circuit board, comprising a step of producing a build-up wiring board by the method according to any one of (61) to (64).

  According to the present invention, both peeling due to an external force generated by the collision with another member is effectively reduced. Therefore, the handling property of the metal foil with carrier is improved, and the advantage that the productivity of the printed wiring board using the metal foil with carrier is improved is obtained.

An example of the configuration of CCL is shown. The structural example of the metal foil with a carrier which concerns on this invention is shown. The typical structural example when the metal foil with a carrier which concerns on this invention is planarly viewed is shown. It is the figure seen from the direction perpendicular | vertical with respect to the direction which overlaps the metal foil with a carrier of FIG. The other typical structural example of the metal foil with a carrier which concerns on this invention is shown. It is the figure seen from the direction perpendicular | vertical with respect to the direction which overlaps the metal foil with a carrier of FIG. The assembly example of the multilayer CCL using the copper foil with a carrier which concerns on this invention (The form which copper foil joined to the single side | surface of the resin board) is shown. The assembly example of the multilayer CCL using the copper foil with a carrier which concerns on this invention (The form which copper foil joined on both surfaces of the resin board) is shown.

  In one embodiment of a metal foil with a carrier according to the present invention, a metal foil with a carrier comprising a resin-made plate-like carrier and a metal foil that is detachably adhered to one or both sides, preferably both sides of the carrier, is prepared. To do. One structural example of the metal foil with a carrier according to the present invention is shown in FIGS. In particular, at the beginning of FIG. 7, the metal foil with carrier 11 is shown in which the metal foil 11a is detachably adhered to both surfaces of a resin plate carrier 11c. The plate-like carrier 11c and the metal foil 11a are bonded together by using a layer made of a release agent or a release material 11b described later.

  Although structurally similar to the CCL shown in FIG. 1, the metal foil with a carrier of the present invention has a structure in which the metal foil and the resin are finally separated and can be easily peeled off. In this respect, since the CCL is not peeled off, the structure and function are completely different.

  Since the metal foil with carrier used in the present invention must be peeled off eventually, it is inconvenient that the adhesiveness is excessively high, but the plate-like carrier and the metal foil are chemicals such as plating performed in the printed circuit board manufacturing process. Adhesiveness that does not peel in the processing step is necessary. From such a viewpoint, the peel strength between the metal foil and the plate-like carrier is preferably 10 gf / cm or more, more preferably 30 gf / cm or more, and even more preferably 50 gf / cm or more. Therefore, it is preferably 200 gf / cm or less, more preferably 150 gf / cm or less, and still more preferably 80 gf / cm or less. By setting the peel strength between the metal foil and the plate-like carrier in such a range, it can be easily peeled off by hand, that is, mechanically peeled off without being peeled off during transport or processing.

  Further, the metal foil with carrier has a shape in which the metal foil and the plate-like carrier have the same shape and have no corner (vertex) having an inner angle of 90 degrees or less when viewed in plan. As a typical example of such a “shape having no corner (vertex) having an internal angle of 90 degrees or less”, the metal foil and the plate-like carrier have the same shape when viewed in plan, and And a shape surrounded by straight lines and curves. At this time, the curve is an arc or an elliptical arc. Another representative example is a polygonal shape with all internal angles larger than 90 degrees, for example, a convex polygonal shape with all internal angles larger than 90 degrees and smaller than 180 degrees. Furthermore, another typical example is a shape surrounded only by a curve.

  Specific examples of such a structure include a shape surrounded by straight lines and curves as shown in FIG. 3 when viewed in plan, or a polygon having an interior angle larger than 90 degrees as shown in FIG. Shape.

3 and 4 show typical configuration examples of the metal foil with a carrier. FIG. 3 is a diagram when this configuration example is viewed in plan, and FIG. 4 is a diagram when the configuration example is viewed from a direction perpendicular to the direction in which the configuration example is superimposed.
3 and 4, the plate-like carrier 21 and the metal foil 22 are bonded together to constitute the carrier-attached metal foil 20, but when viewed in plan, the metal foil 22 and the plate-like carrier 21 have the same shape, In addition, as shown in FIG. 3, both the metal foil 22 and the plate-like carrier 21 have a shape surrounded by sides and a curved surface 34.

5 and 6 show other typical configuration examples of the metal foil with carrier. FIG. 5 is a diagram when this configuration example is viewed in plan, and FIG. 6 is a diagram when the configuration example is viewed from a direction perpendicular to the direction in which the configuration example is superimposed.
5 and 6, the plate-like carrier 31 and the metal foil 32 are laminated to constitute the metal foil 30 with a carrier, and when viewed in plan, the metal foil and the plate-like carrier have the same shape, And as shown in FIG. 5, it is a polygonal shape whose interior angle is an angle larger than 90 degreeC. That is, instead of the curved surface 34 of the metal foil with a carrier in FIG. 3, a flat surface is formed in the stacking direction of the metal foil 32 and the plate-like carrier 31.

  By adopting such a configuration, there is no projecting portion in the vicinity of the square where the other member is most likely to come into contact, so the interface between the plate-like carrier and the metal foil can be obtained only by an external force generated by the collision of the other member. As a result, it is difficult for a large stress change to occur, so that peeling between the plate-like carrier and the metal foil during handling can be reduced.

  Moreover, although the aspect which bonds a metal foil only to the single side | surface of a plate-shaped carrier was shown in FIGS. 3-6, you may bond a metal foil to both surfaces.

  In addition, as will be described later, when the above-described metal foil with a carrier is used for cutting at an end portion, when viewed in a plan view, a region having a diameter of 0. About 1 to 10 holes having a diameter of about 01 mm to 10 mm may be provided. The holes provided in this way can be used as means for fixing positioning pins or the like in the production of a multilayer metal-clad laminate described later or the build-up board.

  Next, a release agent or a release material that can be preferably used when the plate-like carrier and the metal foil are bonded together in order to realize the adhesion required for the use of the metal foil with a carrier described later will be described.

(1) Silane compound A silane compound having a structure represented by the following formula, a hydrolysis product thereof, or a condensate of the hydrolysis product (hereinafter simply referred to as a silane compound) is used alone or in combination. Then, by sticking the plate-like carrier and the metal foil, the adhesiveness is moderately lowered, and the peel strength can be adjusted to a range as described later.

formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)

  The silane compound needs to have at least one alkoxy group. A hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group in the absence of an alkoxy group, or any one of these hydrocarbons in which one or more hydrogen atoms are substituted with a halogen atom When a substituent is comprised only by group, there exists a tendency for the adhesiveness of a plate-shaped carrier and metal foil surface to fall too much. The silane compound is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group, or any one of these hydrocarbon groups in which one or more hydrogen atoms are substituted with a halogen atom. It is necessary to have at least one. This is because when the hydrocarbon group does not exist, the adhesion between the plate-like carrier and the metal foil surface tends to increase. The alkoxy group according to the present invention includes an alkoxy group in which one or more hydrogen atoms are substituted with halogen atoms.

In adjusting the peel strength between the plate-like carrier and the metal foil to the above-mentioned range, the silane compound has three alkoxy groups and the hydrocarbon group (a hydrocarbon group in which one or more hydrogen atoms are substituted with a halogen atom). It is preferable to have one). In terms of the above formula, both R ³ and R ⁴ are alkoxy groups.

Examples of the alkoxy group include, but are not limited to, methoxy group, ethoxy group, n- or iso-propoxy group, n-, iso- or tert-butoxy group, n-, iso- or neo-pentoxy group, n-hexoxy. Group, cyclohexyloxy group, n-heptoxy group, n-octoxy group, etc., linear, branched, or cyclic carbon number of 1 to 20, preferably 1 to 10, more preferably 1 to 5 alkoxy groups.
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

  Examples of the alkyl group include, but are not limited to, methyl group, ethyl group, n- or iso-propyl group, n-, iso- or tert-butyl group, n-, iso- or neo-pentyl group, and n-hexyl. A linear or branched alkyl group having 1 to 20, preferably 1 to 10 carbon atoms, more preferably 1 to 5 carbon atoms, such as a group, an n-octyl group, and an n-decyl group.

  Examples of the cycloalkyl group include, but are not limited to, cyclopropyl groups, cyclobutyl groups, cyclopentyl groups, cyclohexyl groups, cycloheptyl groups, cyclooctyl groups, and the like. An alkyl group is mentioned.

  As the aryl group, a phenyl group substituted with an alkyl group (eg, tolyl group, xylyl group), 1- or 2-naphthyl group, anthryl group, etc., having 6 to 20, preferably 6 to 14 carbon atoms. An aryl group is mentioned.

  In these hydrocarbon groups, one or more hydrogen atoms may be substituted with a halogen atom, and may be substituted with, for example, a fluorine atom, a chlorine atom, or a bromine atom.

  Examples of preferred silane compounds include methyltrimethoxysilane, ethyltrimethoxysilane, n- or iso-propyltrimethoxysilane, n-, iso- or tert-butyltrimethoxysilane, n-, iso- or neo-pentyl. Trimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, phenyltrimethoxysilane; alkyl-substituted phenyltrimethoxysilane (eg, p- (methyl) phenyltrimethoxysilane), methyltriethoxysilane, ethyl Triethoxysilane, n- or iso-propyltriethoxysilane, n-, iso- or tert-butyltriethoxysilane, pentyltriethoxysilane, hexyltriethoxysilane, octyltriethoxy Lan, decyltriethoxysilane, phenyltriethoxysilane, alkyl-substituted phenyltriethoxysilane (eg, p- (methyl) phenyltriethoxysilane), (3,3,3-trifluoropropyl) trimethoxysilane, and trideca Fluorooctyltriethoxysilane, methyltrichlorosilane, dimethyldichlorosilane, trimethylchlorosilane, phenyltrichlorosilane, trimethylfluorosilane, dimethyldibromosilane, diphenyldibromosilane, their hydrolysis products, and condensates of these hydrolysis products Etc. Among these, propyltrimethoxysilane, methyltriethoxysilane, hexyltrimethoxysilane, phenyltriethoxysilane, and decyltrimethoxysilane are preferable from the viewpoint of availability.

  The metal foil with a carrier can be produced by bringing a plate-like carrier and the metal foil into close contact with each other by hot pressing. For example, after the silane compound is applied to the bonding surface of the metal foil and / or plate carrier, the B-stage resin plate carrier is hot-press laminated on the bonding surface of the metal foil. Can be manufactured.

  The silane compound can be used in the form of an aqueous solution. Alcohols such as methanol and ethanol can be added in order to increase the solubility in water. The addition of alcohol is particularly effective when a highly hydrophobic silane compound is used. By stirring the aqueous solution of the silane compound, hydrolysis of the alkoxy group is promoted, and when the stirring time is long, condensation of the hydrolysis product is promoted. In general, the peel strength between the metal foil and the plate carrier tends to decrease when a silane compound that has undergone hydrolysis and condensation after a sufficient stirring time has been used. Therefore, the peel strength can be adjusted by adjusting the stirring time. Although it is not limited, the stirring time after the silane compound is dissolved in water can be, for example, 1 to 100 hours, and typically 1 to 30 hours. Of course, there is a method of using without stirring.

  The higher the concentration of the silane compound in the aqueous solution of the silane compound, the lower the peel strength between the metal foil and the plate carrier, and the peel strength can be adjusted by adjusting the concentration of the silane compound. Although it is not limited, the concentration of the silane compound in the aqueous solution can be 0.01 to 10.0% by volume, and typically 0.1 to 5.0% by volume.

  The pH of the aqueous solution of the silane compound is not particularly limited and can be used on either the acidic side or the alkaline side. For example, it can be used at a pH in the range of 3.0 to 10.0. From the standpoint that no special pH adjustment is necessary, it is preferable to set the pH in the range of 5.0 to 9.0, which is near neutral, and more preferable to set the pH in the range of 7.0 to 9.0. .

(2) Compound having two or less mercapto groups in the molecule By using a compound having two or more mercapto groups in the molecule and laminating the plate-like carrier and the metal foil, moderate adhesion can be obtained. The peel strength can be adjusted to a range as described later.
However, when a compound having three or more mercapto groups in the molecule or a salt thereof is bonded between the plate carrier and the metal foil, it is not suitable for the purpose of reducing the peel strength described in the present application. This is because when there is an excessive amount of mercapto groups in the molecule, an excessive amount of sulfide bonds, disulfide bonds or polysulfide bonds are generated by the chemical reaction between the mercapto groups, or the mercapto group and the plate carrier, or the mercapto group and the metal foil, This is because it is considered that the peel strength may be increased by forming a strong three-dimensional crosslinked structure between the plate-like carrier and the metal foil. Such a case is disclosed in Patent Document 2 (Japanese Patent Laid-Open No. 2000-196207).

  Examples of the compound having two or less mercapto groups in the molecule include thiol, dithiol, thiocarboxylic acid or a salt thereof, dithiocarboxylic acid or a salt thereof, thiosulfonic acid or a salt thereof, and dithiosulfonic acid or a salt thereof. At least one selected from these can be used.

  The thiol has one mercapto group in the molecule and is represented by R-SH, for example. Here, R represents an aliphatic or aromatic hydrocarbon group or heterocyclic group which may contain a hydroxyl group or an amino group.

Dithiol has two mercapto groups in the molecule and is represented by, for example, R (SH) ₂ . R represents an aliphatic or aromatic hydrocarbon group or heterocyclic group which may contain a hydroxyl group or an amino group. Two mercapto groups may be bonded to the same carbon, or may be bonded to different carbons or nitrogens.

  A thiocarboxylic acid is one in which a hydroxyl group of an organic carboxylic acid is substituted with a mercapto group, and is represented by R-CO-SH, for example. R represents an aliphatic or aromatic hydrocarbon group or heterocyclic group which may contain a hydroxyl group or an amino group. The thiocarboxylic acid can also be used in the form of a salt. A compound having two thiocarboxylic acid groups can also be used.

  The dithiocarboxylic acid is one in which two oxygen atoms in the carboxy group of the organic carboxylic acid are substituted with sulfur atoms, and is represented by, for example, R- (CS) -SH. R represents an aliphatic or aromatic hydrocarbon group or heterocyclic group which may contain a hydroxyl group or an amino group. Dithiocarboxylic acid can also be used in the form of a salt. A compound having two dithiocarboxylic acid groups can also be used.

The thiosulfonic acid is obtained by replacing the hydroxyl group of an organic sulfonic acid with a mercapto group, and is represented by, for example, R (SO ₂ ) —SH. R represents an aliphatic or aromatic hydrocarbon group or heterocyclic group which may contain a hydroxyl group or an amino group. Further, thiosulfonic acid can be used in the form of a salt.

Dithiosulfonic acid is one in which two hydroxyl groups of an organic disulfonic acid are each substituted with a mercapto group, and is represented by, for example, R-((SO ₂ ) -SH) ₂ . R represents an aliphatic or aromatic hydrocarbon group or heterocyclic group which may contain a hydroxyl group or an amino group. Two thiosulfonic acid groups may be bonded to the same carbon, or may be bonded to different carbons. Dithiosulfonic acid can also be used in the form of a salt.

  Here, examples of the aliphatic hydrocarbon group suitable as R include an alkyl group and a cycloalkyl group, and these hydrocarbon groups may contain either or both of a hydroxyl group and an amino group.

  Examples of the alkyl group include, but are not limited to, methyl group, ethyl group, n- or iso-propyl group, n-, iso- or tert-butyl group, n-, iso- or neo-pentyl group, n -A linear or branched alkyl group having 1 to 20, preferably 1 to 10, more preferably 1 to 5 carbon atoms, such as a hexyl group, an n-octyl group, and an n-decyl group. .

  Moreover, as a cycloalkyl group, although it is not limited, C3-C10, such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, Preferably it is C5-C7 Of the cycloalkyl group.

  Further, examples of the aromatic hydrocarbon group suitable as R include a phenyl group, a phenyl group substituted with an alkyl group (eg, tolyl group, xylyl group), 1- or 2-naphthyl group, anthryl group and the like. -20, preferably 6-14 aryl groups are included, and these hydrocarbon groups may contain either or both of a hydroxyl group and an amino group.

  Moreover, examples of the heterocyclic group suitable as R include imidazole, triazole, tetrazole, benzimidazole, benzotriazole, thiazole, and benzothiazole, which may contain one or both of a hydroxyl group and an amino group.

  Preferred examples of the compound having 2 or less mercapto groups in the molecule include 3-mercapto-1,2propanediol, 2-mercaptoethanol, 1,2-ethanedithiol, 6-mercapto-1-hexanol, 1- Octanethiol, 1-dodecanethiol, 10-hydroxy-1-dodecanethiol, 10-carboxy-1-dodecanethiol, 10-amino-1-dodecanethiol, sodium 1-dodecanethiolsulfonate, thiophenol, thiobenzoic acid, Examples include 4-amino-thiophenol, p-toluenethiol, 2,4-dimethylbenzenethiol, 3-mercapto-1,2,4 triazole, and 2-mercapto-benzothiazole. Among these, 3-mercapto-1,2 propanediol is preferable from the viewpoint of water solubility and waste disposal.

  The metal foil with a carrier can be produced by bringing a plate-like carrier and the metal foil into close contact with each other by hot pressing. For example, after a metal foil and / or a plate-like carrier bonding surface is coated with a compound having two or less mercapto groups in the molecule, the metal foil bonding surface is made of a B-stage resin. This plate-shaped carrier can be manufactured by hot press lamination.

  A compound having two or less mercapto groups in the molecule can be used in the form of an aqueous solution. Alcohols such as methanol and ethanol can be added in order to increase the solubility in water. The addition of alcohol is particularly effective when a compound having two or less mercapto groups in a highly hydrophobic molecule is used.

  The higher the concentration of the compound having 2 or less mercapto groups in the molecule in the aqueous solution, the lower the peel strength between the metal foil and the plate carrier, and the lower the concentration of the compound having 2 or less mercapto groups in the molecule. The peel strength can be adjusted by adjusting the concentration. Although it is not limited, the concentration of the compound having 2 or less mercapto groups in the molecule in the aqueous solution can be 0.01 to 10.0% by weight, typically 0.1 to 5.0%. % By weight.

  The pH of the aqueous solution of the compound having two or less mercapto groups in the molecule is not particularly limited and can be used on either the acidic side or the alkaline side. For example, it can be used at a pH in the range of 3.0 to 10.0. From the standpoint that no special pH adjustment is necessary, it is preferable to set the pH in the range of 5.0 to 9.0, which is near neutral, and more preferable to set the pH in the range of 7.0 to 9.0. .

(3) Metal alkoxide An aluminate compound, titanate compound, zirconate compound, or a hydrolysis product thereof having a structure represented by the following formula, or a condensation product of the hydrolysis product (hereinafter simply referred to as a metal alkoxide) alone By adhering the plate-like carrier and the metal foil to each other or using a mixture of them, the adhesiveness is moderately lowered, and the peel strength can be adjusted to a range as described later.

In the formula, R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms. Any one of these substituted hydrocarbon groups, M is any one of Al, Ti, and Zr, n is 0 or 1 or 2, m is an integer from 1 to M, and R1 At least one of these is an alkoxy group. M + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr.

  The metal alkoxide needs to have at least one alkoxy group. A hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group in the absence of an alkoxy group, or any one of these hydrocarbons in which one or more hydrogen atoms are substituted with a halogen atom When a substituent is comprised only by group, there exists a tendency for the adhesiveness of a plate-shaped carrier and metal foil surface to fall too much. The metal alkoxide is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group, or any one of these hydrocarbon groups in which one or more hydrogen atoms are substituted with a halogen atom. It is necessary to have 0 to 2 pieces. This is because when three or more hydrocarbon groups are present, the adhesion between the plate-like carrier and the metal foil surface tends to be excessively lowered. The alkoxy group according to the present invention includes an alkoxy group in which one or more hydrogen atoms are substituted with halogen atoms. In adjusting the peel strength between the plate-like carrier and the metal foil to the above-mentioned range, the metal alkoxide has two or more alkoxy groups and the hydrocarbon group (a hydrocarbon in which one or more hydrogen atoms are substituted with a halogen atom). It preferably has one or two groups).

  Examples of the alkyl group include, but are not limited to, methyl group, ethyl group, n- or iso-propyl group, n-, iso- or tert-butyl group, n-, iso- or neo-pentyl group, n -A linear or branched alkyl group having 1 to 20, preferably 1 to 10, more preferably 1 to 5 carbon atoms, such as a hexyl group, an n-octyl group, and an n-decyl group. .

  Moreover, as a cycloalkyl group, although it is not limited, C3-C10, such as a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, Preferably it is C5-C7 Of the cycloalkyl group.

In addition, examples of the aromatic hydrocarbon group suitable as R ² include a phenyl group, a phenyl group substituted with an alkyl group (eg, tolyl group, xylyl group), 1- or 2-naphthyl group, anthryl group, and the like. Examples thereof include 6 to 20, preferably 6 to 14, aryl groups, and these hydrocarbon groups may contain one or both of a hydroxyl group and an amino group.
In these hydrocarbon groups, one or more hydrogen atoms may be substituted with a halogen atom, and may be substituted with, for example, a fluorine atom, a chlorine atom, or a bromine atom.

  Examples of preferred aluminate compounds include trimethoxyaluminum, methyldimethoxyaluminum, ethyldimethoxyaluminum, n- or iso-propyldimethoxyaluminum, n-, iso- or tert-butyldimethoxyaluminum, n-, iso- or neo- Pentyl dimethoxy aluminum, hexyl dimethoxy aluminum, octyl dimethoxy aluminum, decyl dimethoxy aluminum, phenyl dimethoxy aluminum; alkyl-substituted phenyl dimethoxy aluminum (for example, p- (methyl) phenyl dimethoxy aluminum), dimethyl methoxy aluminum, triethoxy aluminum, methyl diethoxy aluminum Ethyldiethoxyaluminum, n- or iso-propyldiethoxy Luminium, n-, iso- or tert-butyldiethoxyaluminum, pentyldiethoxyaluminum, hexyldiethoxyaluminum, octyldiethoxyaluminum, decyldiethoxyaluminum, phenyldiethoxyaluminum, alkyl-substituted phenyldiethoxyaluminum (eg p -(Methyl) phenyldiethoxyaluminum), dimethylethoxyaluminum, triisopropoxyaluminum, methyldiisopropoxyaluminum, ethyldiisopropoxyaluminum, n- or iso-propyldiethoxyaluminum, n-, iso- or tert-butyl Diisopropoxy aluminum, pentyl diisopropoxy aluminum, hexyl diisopropoxy aluminum, octyl diiso Ropoxyaluminum, decyldiisopropoxyaluminum, phenyldiisopropoxyaluminum, alkyl-substituted phenyldiisopropoxyaluminum (eg, p- (methyl) phenyldiisopropoxyaluminum), dimethylisopropoxyaluminum, (3,3,3- Trifluoropropyl) dimethoxyaluminum, and tridecafluorooctyldiethoxyaluminum, methyldichloroaluminum, dimethylchloroaluminum, dimethylchloroaluminum, phenyldichloroaluminum, dimethylfluoroaluminum, dimethylbromoaluminum, diphenylbromoaluminum, and their hydrolysis products And condensates of these hydrolysis products. Among these, from the viewpoint of availability, trimethoxyaluminum, triethoxyaluminum, and triisopropoxyaluminum are preferable.

  Examples of preferred titanate compounds include tetramethoxy titanium, methyl trimethoxy titanium, ethyl trimethoxy titanium, n- or iso-propyl trimethoxy titanium, n-, iso- or tert-butyl trimethoxy titanium, n-, iso- Or neo-pentyltrimethoxytitanium, hexyltrimethoxytitanium, octyltrimethoxytitanium, decyltrimethoxytitanium, phenyltrimethoxytitanium; alkyl-substituted phenyltrimethoxytitanium (eg, p- (methyl) phenyltrimethoxytitanium), dimethyldimethoxy Titanium, tetraethoxy titanium, methyl triethoxy titanium, ethyl triethoxy titanium, n- or iso-propyl triethoxy titanium, n-, iso- or tert-butyl triethoxy titanium, Tiltlyethoxytitanium, Hexyltriethoxytitanium, Octyltriethoxytitanium, Decyltriethoxytitanium, Phenyltriethoxytitanium, Alkyl-substituted phenyltriethoxytitanium (eg, p- (methyl) phenyltriethoxytitanium), Dimethyldiethoxytitanium, Tetraisopropoxytitanium, methyltriisopropoxytitanium, ethyltriisopropoxytitanium, n- or iso-propyltriethoxytitanium, n-, iso- or tert-butyltriisopropoxytitanium, pentyltriisopropoxytitanium, hexyltriiso Propoxy titanium, octyltriisopropoxy titanium, decyl triisopropoxy titanium, phenyl triisopropoxy titanium, alkyl substituted phenyl triisopropoxy titanium (example P- (methyl) phenyltriisopropoxytitanium), dimethyldiisopropoxytitanium, (3,3,3-trifluoropropyl) trimethoxytitanium, and tridecafluorooctyltriethoxytitanium, methyltrichlorotitanium, dimethyldichloro Examples include titanium, trimethylchlorotitanium, phenyltrichlorotitanium, dimethyldifluorotitanium, dimethyldibromotitanium, diphenyldibromotitanium, hydrolysis products thereof, and condensates of these hydrolysis products. Among these, tetramethoxy titanium, tetraethoxy titanium, and tetraisopropoxy titanium are preferable from the viewpoint of availability.

  Examples of preferred zirconate compounds include tetramethoxyzirconium, methyltrimethoxyzirconium, ethyltrimethoxyzirconium, n- or iso-propyltrimethoxyzirconium, n-, iso- or tert-butyltrimethoxyzirconium, n-, iso- Or neo-pentyltrimethoxyzirconium, hexyltrimethoxyzirconium, octyltrimethoxyzirconium, decyltrimethoxyzirconium, phenyltrimethoxyzirconium; alkyl-substituted phenyltrimethoxyzirconium (eg, p- (methyl) phenyltrimethoxyzirconium), dimethyldimethoxy Zirconium, tetraethoxyzirconium, methyltriethoxyzirconium, ethyltriethoxyzirconium, n Or iso-propyltriethoxyzirconium, n-, iso- or tert-butyltriethoxyzirconium, pentyltriethoxyzirconium, hexyltriethoxyzirconium, octyltriethoxyzirconium, decyltriethoxyzirconium, phenyltriethoxyzirconium, alkyl-substituted phenyltri Ethoxyzirconium (eg, p- (methyl) phenyltriethoxyzirconium), dimethyldiethoxyzirconium, tetraisopropoxyzirconium, methyltriisopropoxyzirconium, ethyltriisopropoxyzirconium, n- or iso-propyltriethoxyzirconium, n- , Iso- or tert-butyltriisopropoxyzirconium, pentyltriisopropoxydi Konium, hexyltriisopropoxyzirconium, octyltriisopropoxyzirconium, decyltriisopropoxyzirconium, phenyltriisopropoxyzirconium, alkyl-substituted phenyltriisopropoxyzirconium (eg, p- (methyl) phenyltriisopropoxytitanium), dimethyldi Isopropoxyzirconium, (3,3,3-trifluoropropyl) trimethoxyzirconium, and tridecafluorooctyltriethoxyzirconium, methyltrichlorozirconium, dimethyldichlorozirconium, trimethylchlorozirconium, phenyltrichlorozirconium, dimethyldifluorozirconium, dimethyldibromo Zirconium, diphenyldibromozirconium and their hydrolyzed products Examples thereof include condensates of these products and hydrolysis products thereof. Among these, tetramethoxyzirconium, tetraethoxyzirconium, and tetraisopropoxyzirconium are preferable from the viewpoint of availability.

  The metal foil with a carrier can be produced by bringing a plate-like carrier and the metal foil into close contact with each other by hot pressing. For example, after applying the metal alkoxide in the molecule to the bonding surface of the metal foil and / or plate carrier, the B-stage resin plate carrier is applied to the bonding surface of the metal foil. It can be manufactured by hot press lamination.

  The metal alkoxide can be used in the form of an aqueous solution. Alcohols such as methanol and ethanol can be added in order to increase the solubility in water. The addition of alcohol is particularly effective when a highly hydrophobic metal alkoxide is used.

  The higher the concentration of the metal alkoxide in the aqueous solution, the lower the peel strength between the metal foil and the plate carrier, and the peel strength can be adjusted by adjusting the metal alkoxide concentration. Although not limited, the concentration of the metal alkoxide in the aqueous solution can be 0.001 to 1.0 mol / L, and typically 0.005 to 0.2 mol / L.

  The pH of the aqueous solution of the metal alkoxide is not particularly limited and can be used on either the acidic side or the alkaline side. For example, it can be used at a pH in the range of 3.0 to 10.0. From the standpoint that no special pH adjustment is necessary, it is preferable to set the pH in the range of 5.0 to 9.0, which is near neutral, and more preferable to set the pH in the range of 7.0 to 9.0. .

(4) Release material comprising a resin coating film A resin comprising a plate-like carrier and a metal foil, and one or more resins selected from silicone, epoxy resin, melamine resin and fluororesin By sticking the plate-like carrier and the metal foil using the coating film, the adhesiveness is moderately lowered, and the peel strength can be adjusted to a range as described later.

  As described later, the adjustment of the peel strength for realizing such adhesion is composed of silicone and any one or a plurality of resins selected from an epoxy resin, a melamine resin, and a fluororesin. This is done by using a resin coating. Such a resin coating film is baked under predetermined conditions as described later, and is hot-pressed and bonded between the plate-like carrier and the metal foil, so that the adhesiveness is appropriately lowered and peeled. This is because the strength can be adjusted to the above-described range.

  Epoxy resins include bisphenol A type epoxy resin, bisphenol F type epoxy resin, novolac type epoxy resin, brominated epoxy resin, amine type epoxy resin, flexible epoxy resin, hydrogenated bisphenol A type epoxy resin, phenoxy resin, Examples thereof include brominated phenoxy resin.

  Examples of the melamine-based resin include methyl etherified melamine resin, butylated urea melamine resin, butylated melamine resin, methylated melamine resin, and butyl alcohol-modified melamine resin. The melamine resin may be a mixed resin of the resin and a butylated urea resin, a butylated benzoguanamine resin, or the like.

  The number average molecular weight of the epoxy resin is preferably 2000 to 3000, and the number average molecular weight of the melamine resin is preferably 500 to 1000. By having such a number average molecular weight, the resin can be made into a paint and the adhesive strength of the resin coating film can be easily adjusted to a predetermined range.

  Examples of the fluororesin include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, and polyvinyl fluoride.

  Examples of silicone include methylphenylpolysiloxane, methylhydropolysiloxane, dimethylpolysiloxane, modified dimethylpolysiloxane, and mixtures thereof. Here, the modification is, for example, epoxy modification, alkyl modification, amino modification, carboxyl modification, alcohol modification, fluorine modification, alkylaralkyl polyether modification, epoxy polyether modification, polyether modification, alkyl higher alcohol ester modification, polyester modification. And acyloxyalkyl modification, halogenated alkylacyloxyalkyl modification, halogenated alkyl modification, aminoglycol modification, mercapto modification, hydroxyl group-containing polyester modification, and the like.

  In the resin coating film, when the film thickness is too small, the resin coating film is too thin and difficult to form, so that productivity is easily lowered. Moreover, even if a film thickness exceeds a fixed magnitude | size, the further improvement of the peelability of a resin coating film is not seen, but the manufacturing cost of a resin coating film tends to become high. From such a viewpoint, the resin coating film preferably has a thickness of 0.1 to 10 μm, and more preferably 0.5 to 5 μm. Moreover, the film thickness of a resin coating film is achieved by apply | coating a resin coating material by the predetermined application amount in the procedure mentioned later.

  In the resin coating film, silicone functions as a release agent for the resin coating film. Therefore, if the total amount of epoxy resin and melamine resin is too much compared to silicone, the peel strength imparted by the resin coating between the plate-like carrier and the metal foil increases, so that the peelability of the resin coating is increased. May decrease and may not be easily removed by hand. On the other hand, if the total amount of the epoxy resin and the melamine resin is too small, the above-mentioned peel strength becomes small, and therefore, the metal foil with a carrier may be peeled off during transport or processing. From this viewpoint, it is preferable that the total of the epoxy resin and the melamine resin is included in an amount of 10 to 1500 parts by mass, and more preferably 20 to 800 parts by mass with respect to 100 parts by mass of silicone. Is preferred.

  Further, like silicone, the fluororesin functions as a release agent and has the effect of improving the heat resistance of the resin coating film. If the amount of fluororesin is too much compared to silicone, the aforementioned peel strength will be low, which may cause peeling during transport or processing of the metal foil with carrier, and it will be uneconomical because the temperature required for the baking process described later will increase. It becomes. From this viewpoint, the fluororesin is preferably 0 to 50 parts by mass, more preferably 0 to 40 parts by mass with respect to 100 parts by mass of silicone.

The resin coating film is selected from SiO ₂ , MgO, Al ₂ O ₃ , BaSO ₄ and Mg (OH) ₂ in addition to silicone and epoxy resin and / or melamine resin and, if necessary, fluororesin 1 You may further contain the surface roughening particle | grains of a seed | species or more. When the resin coating film contains surface roughening particles, the surface of the resin coating film becomes uneven. Due to the unevenness, the surface of the plate-like carrier or metal foil to which the resin coating film is applied becomes uneven and becomes a matte surface. Although content of the surface roughening particle | grains will not be specifically limited if a resin coating film is uneven | corrugated, 1-10 mass parts is preferable with respect to 100 mass parts of silicone.

  The particle diameter of the surface roughened particles is preferably 15 nm to 4 μm. Here, the particle diameter means an average particle diameter (average value of the maximum particle diameter and the minimum particle diameter) measured from a scanning electron microscope (SEM) photograph or the like. When the particle diameter of the surface roughened particles is within the above range, the unevenness on the surface of the resin coating film can be easily adjusted, and as a result, the unevenness on the surface of the plate-like carrier or metal foil can be easily adjusted. Specifically, the amount of irregularities on the surface of the plate-like carrier or metal foil is about 4.0 μm in terms of the maximum height roughness Ry defined by JIS.

Here, the manufacturing method of metal foil with a carrier is demonstrated.
This metal foil with a carrier is obtained through a procedure having a step of applying the above-described resin coating to at least one surface of a plate-like carrier or metal foil and a baking step of curing the applied resin coating. . Hereinafter, each step will be described.

(Coating process)
In the coating process, a resin coating consisting of silicone as the main agent, epoxy resin as the curing agent, melamine resin, and fluororesin as the release agent as required is applied to one or both sides of the plate-like carrier. And forming a resin coating film. The resin paint is obtained by dissolving an epoxy resin, a melamine resin, a fluororesin, and silicone in an organic solvent such as alcohol. Moreover, it is preferable that the compounding quantity (addition quantity) in a resin coating material is 10-1500 mass parts with respect to 100 mass parts of ricone, and the sum total of an epoxy resin and a melamine resin. Moreover, it is preferable that a fluororesin is 0-50 mass parts with respect to 100 mass parts of silicone.

The coating method in the coating process is not particularly limited as long as a resin coating film can be formed, but a gravure coating method, a bar coating method, a roll coating method, a curtain flow coating method, a method using an electrostatic coating machine, etc. are used. In view of the uniformity of the resin coating film and the ease of work, the gravure coating method is preferred. Moreover, as an application quantity, 1.0-2.0 g / m < ² > is preferable as a resin quantity so that the resin coating film 3 may become preferable film thickness: 0.5-5 micrometers.

  The gravure coating method is a method in which a resin coating film is formed on the surface of a plate-like carrier by transferring a resin coating filled in a recess (cell) provided on the roll surface to the plate-like carrier. Specifically, the lower part of the lower roll having cells provided on the surface is immersed in the resin paint, and the resin paint is pumped into the cell by the rotation of the lower roll. Then, the plate-like carrier is arranged between the lower roll and the upper roll arranged on the upper side of the lower roll, and the lower roll and the upper roll are held while pressing the plate-like carrier against the lower roll with the upper roll. By rotating, the plate-like carrier is conveyed, and the resin paint pumped into the cell is transferred (applied) to one side of the plate-like carrier.

  In addition, by placing a doctor blade on the side where the plate-shaped carrier is brought into contact with the surface of the lower roll, excess resin paint pumped up on the roll surface other than the cells is removed, and the surface of the plate-shaped carrier is removed. A predetermined amount of resin paint is applied to the substrate. In addition, when the count (size and depth) of a cell is large, or when the viscosity of a resin coating is high, the resin coating film formed on one side of a plate-like carrier becomes difficult to become smooth. Therefore, a smoothing roll may be disposed on the carry-out side of the plate carrier to maintain the smoothness of the resin coating film.

  In addition, when forming the resin coating film on both surfaces of the plate carrier, after forming the resin coating film on one surface of the plate carrier, turn over the plate carrier, and again between the lower roll and the upper roll. Place between. In the same manner as described above, the resin paint in the cell of the lower roll is transferred (applied) to the back surface of the plate-like carrier.

(Baking process)
A baking process is a process of performing the baking process for 0.5 to 60 second (baking time) at 125-320 degreeC (baking temperature) to the resin coating film formed at the application | coating process. In this way, by subjecting the resin coating formed with a predetermined amount of resin coating to a predetermined baking condition, the peel strength between the plate carrier and the metal foil provided by the resin coating is in a predetermined range. Controlled. In the present invention, the baking temperature is the ultimate temperature of the plate carrier. Moreover, a conventionally well-known apparatus is used as a heating means used for a baking process.

  When the baking is insufficient, for example, when the baking temperature is less than 125 ° C. or when the baking time is less than 0.5 seconds, the resin coating becomes insufficiently cured, and the peel strength exceeds 200 gf / cm, The peelability is reduced. Moreover, when baking is an excessive condition, for example, when baking temperature exceeds 320 degreeC, a resin coating film deteriorates, the said peeling strength exceeds 200 gf / cm, and the workability | operativity at the time of peeling deteriorates. Or a plate-shaped carrier may change in quality by high temperature. Further, when the baking time exceeds 60 seconds, the productivity is deteriorated.

In the method for producing a metal foil with a carrier, the resin coating in the coating step is made of silicone as a main agent, epoxy resin as a curing agent, melamine resin, fluororesin as a release agent, SiO ₂ , MgO, Al _It may be composed of one or more kinds of surface roughened particles selected from ₂ O ₃ , BaSO ₄ and Mg (OH) ₂ .

  Specifically, the resin coating is obtained by further adding surface roughening particles to the above-described silicone-added resin solution. By further adding such surface-roughened particles to the resin coating, the surface of the resin coating film becomes uneven, and the unevenness makes the plate-like carrier or metal foil uneven, resulting in a matte surface. And in order to obtain the plate-like carrier or metal foil which has such a matt surface, the compounding quantity (addition amount) of the surface roughening particle | grains in a resin coating is 1-10 mass with respect to 100 mass parts of silicone. Part. Moreover, it is more preferable that the particle diameter of the surface roughened particles is 15 nm to 4 μm.

  The production method according to the present invention is as described above. However, in carrying out the present invention, other steps may be included between or before and after each step within a range that does not adversely affect each step. . For example, you may perform the washing | cleaning process which wash | cleans the surface of a plate-shaped carrier before an application | coating process.

(Peel strength considering thermal history in the manufacturing process of multilayer printed wiring boards)
In general, in the manufacturing process of a multilayer printed wiring board, heat treatment is often performed in a lamination press process or a desmear process. Therefore, the heat history that the metal foil with a carrier receives becomes severer as the number of laminated layers increases. Therefore, when considering application to a multilayer printed wiring board in particular, it is desirable that the peel strength between the metal foil and the plate-like carrier is in the above-described range even after passing through a required thermal history.

  Accordingly, in a further preferred embodiment of the present invention, the metal after assuming at least one of heating for 3 hours, 6 hours or 9 hours at 220 ° C., assuming heating conditions in the production process of the multilayer printed wiring board. The peel strength between the foil and the plate-like carrier is preferably 30 gf / cm or more, and more preferably 50 gf / cm or more. The peel strength is preferably 200 gf / cm or less, more preferably 150 gf / cm or less, and even more preferably 80 gf / cm or less.

  Regarding the peel strength after heating at 220 ° C., the peel strength was described above in both 3 hours and 6 hours, or both 6 hours and 9 hours from the viewpoint of being able to cope with various lamination numbers. It is preferable to satisfy the range, and it is further preferable that all peel strengths after 3 hours, 6 hours, and 9 hours satisfy the above-described range.

  In this invention, peel strength is measured based on the 90 degree peel strength measuring method prescribed | regulated to JISC6481.

  Hereinafter, specific constituent requirements of each material for realizing such peel strength will be described.

The resin that serves as the plate-like carrier is not particularly limited, and phenol resin, polyimide resin, epoxy resin, natural rubber, pine resin, and the like can be used, but a thermosetting resin is preferable. A prepreg can also be used. The prepreg before being bonded to the metal foil is preferably in a B-stage state. The linear expansion coefficient of the prepreg (C stage) is 12 to 18 (× 10 ⁻⁶ / ° C.), 16.5 (× 10 ⁻⁶ / ° C.) of the copper foil as the constituent material of the substrate, or 17 of the SUS press plate .3 (× 10 ⁻⁶ / ° C.) is advantageous in that it is difficult to cause circuit misalignment due to a phenomenon (scaling change) in which the substrate size before and after pressing differs from that at the time of design. Furthermore, as a synergistic effect of these merits, it becomes possible to produce a multilayer ultra-thin coreless substrate. The prepreg used here may be the same as or different from the prepreg constituting the circuit board. Conventionally, a metal plate has been used as a plate-shaped carrier of a metal foil with a carrier. In this case, the plate-like carrier and the metal foil are adhered to each other by welding or an adhesive. When using an adhesive, from the viewpoint of heat resistance, there are many things that are generally not suitable for build-up, and when closely contacting by welding, the peel strength is too high when using full-surface welding, It is difficult to peel off easily, and it becomes difficult to prevent the chemical solution from entering between the plate-shaped carrier and the metal foil when using partial welding. . Therefore, by using a resin-made plate-like carrier, an appropriate peel strength can be exhibited with the metal foil, and by using a heat-resistant resin, it can sufficiently withstand the heat history during build-up. be able to. In addition, as a heat resistant resin, a well-known thing can be used.

  Therefore, it is preferable that the plate-like carrier has a high glass transition temperature Tg from the viewpoint of maintaining the peel strength after heating in an optimum range, for example, a glass transition temperature Tg of 120 to 320 ° C, preferably 170 to 240 ° C. is there. The glass transition temperature Tg is a value measured by DSC (differential scanning calorimetry).

  The thermal expansion coefficient of the resin is preferably within + 10% and −30% of the thermal expansion coefficient of the metal foil. As a result, it is possible to effectively prevent circuit misalignment due to the difference in thermal expansion between the metal foil and the resin, thereby reducing the occurrence of defective products and improving the yield.

  The thickness of the plate-like carrier is not particularly limited and may be rigid or flexible. However, if it is too thick, it will adversely affect the heat distribution during hot pressing, while if it is too thin, it will bend and will not flow through the printed wiring board manufacturing process. Therefore, it is usually 5 μm or more and 1000 μm or less, preferably 50 μm or more and 900 μm or less, and more preferably 100 μm or more and 400 μm or less.

  As the metal foil, copper or copper alloy foil is typical, but foils of aluminum, nickel, zinc and the like can also be used. In the case of copper or copper alloy foil, electrolytic foil or rolled foil can be used. Although not limited, the metal foil generally has a thickness of 1 [mu] m or more, preferably 5 [mu] m or more, and 400 [mu] m or less, preferably 120 [mu] m or less, considering use as a wiring of a printed circuit board. When metal foil is affixed on both surfaces of the plate-like carrier, metal foils having the same thickness may be used, or metal foils having different thicknesses may be used.

  Various surface treatments may be applied to the metal foil used. For example, metal plating for the purpose of imparting heat resistance (Ni plating, Ni—Zn alloy plating, Cu—Ni alloy plating, Cu—Zn alloy plating, Zn plating, Cu—Ni—Zn alloy plating, Co—Ni alloy plating, etc. ), Chromate treatment (including the case where one or more alloy elements such as Zn, P, Ni, Mo, Zr, Ti, etc. are contained in the chromate treatment liquid) for imparting rust prevention and discoloration resistance, surface roughness Roughening treatment for adjusting the degree (eg: copper electrodeposited grains, Cu—Ni—Co alloy plating, Cu—Ni—P alloy plating, Cu—Co alloy plating, Cu—Ni alloy plating, Cu—Co alloy plating, And Cu-As alloy plating, Cu-As-W alloy plating and other copper alloy plating). The roughening treatment not only affects the peel strength between the metal foil and the plate carrier, but also the chromate treatment has a great influence. Chromate treatment is important from the viewpoint of rust prevention and discoloration resistance, but since it tends to significantly increase the peel strength, it is also meaningful as a means for adjusting the peel strength.

  In conventional CCL, since it is desired that the peel strength between the resin and the copper foil is high, for example, the matte surface (M surface) of the electrolytic copper foil is used as an adhesive surface with the resin, and surface treatment such as roughening treatment is performed. Thus, the adhesive strength is improved by the chemical and physical anchoring effects. On the resin side, various binders are added to increase the adhesive strength with the metal foil. As described above, in the present invention, unlike the CCL, since the metal foil and the resin need to be finally peeled, it is disadvantageous that the peel strength is excessively high.

  Therefore, in a preferred embodiment of the metal foil with a carrier according to the present invention, in order to adjust the peel strength between the metal foil and the plate-like carrier to the preferred range described above, the surface roughness of the bonded surface is contact-type roughness. It is preferably 3.5 μm or less, more preferably 3.0 μm or less, expressed as a ten-point average roughness (Rz jis) of the surface of the metal foil measured according to JIS B 0601: 2001. However, reducing the surface roughness indefinitely takes time and increases costs, so it is preferably 0.1 μm or more, and more preferably 0.3 μm or more. When electrolytic copper foil is used as the metal foil, it is possible to use either a glossy surface (shiny surface, S surface) or a rough surface (matte surface, M surface) by adjusting to such a surface roughness. However, it is easier to adjust the surface roughness by using the S-plane. On the other hand, it is preferable that the ten-point average roughness (Rz jis) of the surface of the metal foil not contacting the carrier is 0.4 μm or more and 10.0 μm or less.

  Moreover, in preferable one Embodiment of metal foil with a carrier which concerns on this invention, surface treatment for peeling strength improvement, such as a roughening process, is not performed with respect to the bonding surface with resin of metal foil. Moreover, in preferable one Embodiment of metal foil with a carrier which concerns on this invention, the binder for improving the adhesive force with metal foil is not added in resin.

As conditions for hot pressing for producing a metal foil with a carrier, when a prepreg is used as a plate-like carrier, it is preferable to hot press at a pressure of 30 to 40 kg / cm ² and a temperature higher than the glass transition temperature of the prepreg. .

  From the above viewpoints, the present invention comprises the above release agent on at least one surface of the metal foil as described above, which serves as the adhesion surface, in order to allow the resin-made plate carrier to be adhered in a peelable manner. Provided is a metal foil coated with a layer or a release material. The surface of the metal foil may be subjected to the chromate treatment as described above before coating with a compound having two or less mercapto groups in the molecule.

  From another viewpoint, the present invention provides a plate-like carrier having a layer made of the above-mentioned mold release agent or a release material on at least one surface of the plate-like carrier that serves as an adhesion surface of a metal foil. This plate-like carrier can be suitably used for applications in which the metal foil as described above is adhered in a peelable manner.

  From yet another viewpoint, the present invention provides a metal foil for coreless multilayer printed wiring boards, wherein the surface of the metal foil as described above is coated with a layer or a release material made of the above release agent. Further, the surface of the metal foil may be subjected to the chromate treatment as described above before being coated with a compound having two or less mercapto groups in the molecule.

  The surface of the metal foil or resin was measured with a scanning electron microscope or the like equipped with XPS (X-ray photoelectron spectrometer), EPMA (electron beam microanalyzer), EDX (energy dispersive X-ray analysis). If detected, it can be inferred that a silane compound is present on the surface of the metal foil or resin. If S is detected, the surface of the metal foil or resin has two or less mercapto groups in the molecule. It can be inferred that a compound is present, and if Al, Ti, Zr is detected, it can be inferred that the metal alkoxide is present on the surface of the metal foil or resin.

Furthermore, from another viewpoint, this invention provides the use of the metal foil with a carrier mentioned above.
First, a multilayer metal including laminating a resin on at least one metal foil side of the metal foil with a carrier described above, and then laminating the resin or the metal foil one or more times, for example, 1 to 10 times repeatedly. A method for producing a tension laminate is provided.

  Second, the resin is laminated on the metal foil side of the metal foil with carrier described above, and then the metal foil is laminated on the surface of the resin, the single-sided or double-sided metal-clad laminate, the metal foil with carrier of the present invention, or the resin. There is provided a method for producing a multilayer metal-clad laminate including repeatedly laminating a laminated body or a metal foil one or more times, for example, 1 to 10 times. In addition, the subsequent lamination of the resin laminated on the first metal foil with carrier is performed as many times as desired, and in each lamination time, resin, single-sided or double-sided metal-clad laminate, metal foil with carrier of the present invention, laminate, And can be arbitrarily selected from the group consisting of metal foils.

  Furthermore, the laminate used here may be anything as long as it is simply formed by laminating a resin and a metal foil, and the resin and the metal foil can be easily used under certain conditions like the metal foil with a carrier of the present invention. It is not required to be peeled off. In addition, the laminate used here may be one in which the resin and the metal foil constituting the laminate can be peeled by cutting a portion where the resin and the metal foil are bonded or bonded. Further, the lamination of the resin and the metal foil may be one side or both sides of the resin.

  In the above-described method for producing a multilayer metal-clad laminate, if necessary, on the laminate surface of the plate-like carrier and metal foil of the metal foil with carrier or on the laminate surface of the resin and metal foil of the laminate. For example, the step of cutting on the metal foil of the metal foil with carrier or the metal foil of the laminate, and for example, the plate-like carrier of the metal foil with carrier after cutting and the metal foil are separated and separated. A step or a step of separating and separating the resin and metal foil of the laminate after the cutting may be further included.

  Furthermore, after peeling and isolate | separating the said plate-shaped carrier and metal foil, the process of removing a part or all of metal foil by an etching can be further included.

  Third, the resin is laminated on the metal foil side of the metal foil with carrier described above, and then the resin, single-sided or double-sided wiring board, single-sided or double-sided metal-clad laminate, metal foil with carrier of the present invention, or as described above There is provided a method for producing a build-up substrate, which includes laminating a laminate or a metal foil repeatedly at least once, for example, 1 to 10 times. In addition, the lamination after the resin laminated on the first metal foil with a carrier is performed as many times as desired. In each lamination, the resin, the single-sided or double-sided wiring board, the single-sided or double-sided metal-clad laminate, and the carrier of the present invention are attached. It can be arbitrarily selected from the group consisting of a metal foil, a laminate as described above, and a metal foil.

  Fourth, there is provided a method for manufacturing a buildup substrate including a step of laminating one or more buildup wiring layers on the metal foil side of the metal foil with carrier described above. At this time, the build-up wiring layer can be formed using at least one of a subtractive method, a full additive method, and a semi-additive method.

  Here, the subtractive method in the fourth buildup board manufacturing method using the metal foil with carrier is a metal-clad laminate or a metal foil on a wiring board (including a printed wiring board and a printed circuit board). It refers to a method of forming a conductor pattern by selectively removing unnecessary portions by etching or the like. The full additive method is a method of forming a conductor pattern by electroless plating and / or electrolytic plating without using a metal foil for the conductor layer. The semi-additive method is a method of forming a conductive pattern on a seed layer made of metal foil, for example. In this method, a conductive pattern is formed by using electrolytic metal deposition and electrolytic plating, etching, or a combination thereof, and then the unnecessary seed layer is removed by etching.

  Laminating resin on the metal foil side of the metal foil with carrier described above, then resin, single-sided or double-sided wiring board, single-sided or double-sided metal-clad laminate, metal foil with carrier of the present invention, or laminate as described above, or Build-up including a step of laminating a metal foil with a carrier in such a manner that the metal foil is repeatedly laminated one or more times, for example, 1 to 10 times, and then the resin and the metal foil side are in contact with the last laminated resin. A method for manufacturing a substrate is provided.

  In the above method for manufacturing a build-up substrate, a single-sided or double-sided wiring board, a single-sided or double-sided metal-clad laminate, a metal foil with a carrier, a plate-like carrier with a metal foil with a carrier, a metal foil with a laminate, a laminate The method may further include a step of forming a hole in the resin, metal foil, or resin, and conducting conductive plating on the side and bottom surfaces of the hole. Further, at least one of the metal foil constituting the single-sided or double-sided wiring board, the metal foil constituting the single-sided or double-sided metal-clad laminate, the metal foil constituting the metal foil with carrier, the metal foil constituting the laminate, and the metal foil It can further include performing the process of forming wiring in one or more times.

  In the above build-up board manufacturing method, a resin of a laminate in which a metal foil is laminated on one side of a carrier, or on the carrier side of a metal foil with a carrier having a metal foil adhered to one side on the surface on which a wiring is formed. A step of laminating the sides can be further included. Also, a metal foil with a carrier according to the present invention in which a resin is laminated on the surface on which the wiring is formed and the metal foil is adhered to both sides of the resin, or a laminate in which the metal foil is laminated on both sides of the resin is laminated. The process of carrying out can also be included.

  The “surface on which the wiring is formed” means a portion where wiring is formed on the surface that appears every time a buildup is performed, and the buildup substrate includes both a final product and an intermediate product.

  In the manufacturing method of the build-up substrate, if necessary, on the laminate surface of the plate-like carrier and metal foil of the metal foil with carrier or on the laminate surface of the resin and metal foil of the laminate, For example, the step of cutting on the metal foil of the metal foil with carrier or the metal foil of the laminate, and the step of separating and separating the plate carrier and the metal foil of the metal foil with carrier after the cutting, for example A step of peeling and separating the resin and the metal foil of the laminate after the cutting can be further included.

  Furthermore, after peeling and isolate | separating the said plate-shaped carrier and metal foil, the process of removing a part or all of metal foil by an etching can be further included.

  In addition, in the manufacturing method of the above-mentioned multilayer metal-clad laminate and the manufacturing method of a buildup board | substrate, each layer can be laminated | stacked by performing thermocompression bonding. This thermocompression bonding may be performed every time one layer is stacked, may be performed after being laminated to some extent, or may be performed collectively at the end.

  In particular, the present invention provides a method for manufacturing a build-up board as described above, comprising a single-sided or double-sided wiring board, a single-sided or double-sided copper-clad laminate, a metal foil with a carrier metal foil, a plate-like carrier with a carrier metal foil, and a laminate. Holes are made in metal foil, laminated resin, metal foil or resin, conductive plating is applied to the side and bottom surfaces of the holes, and the metal foil and circuit portion constituting the single-sided or double-sided wiring board, single-sided or double-sided copper-clad Provided is a method for producing a build-up substrate in which a metal foil constituting a laminated plate, a metal foil constituting a metal foil with a carrier, a metal foil constituting a laminated body, or a step of forming a circuit on the metal foil is performed at least once. .

  Hereinafter, as a specific example of the above-described application, a method for producing a four-layer CCL using the metal foil with a carrier according to the present invention will be described. The metal foil with carrier used here is the metal foil with carrier 11 in which the metal foil 11a is adhered to one surface of the plate-like carrier 11c. On this metal foil with carrier 11, a desired number of prepregs 12, and then a two-layer printed circuit board or two-layer metal-clad laminate called inner layer core 13, then prepreg 12, and further metal foil 11 with carrier 11 are sequentially stacked. Thus, a set of four-layer CCL assembly units is completed. Next, this unit 14 (commonly called “page”) is repeated about 10 times to form a press assembly 15 (commonly called “book”) (FIG. 7). Thereafter, the book 15 is sandwiched between the laminated molds 10 and set in a hot press machine, and a large number of four-layer CCLs can be manufactured simultaneously by press molding at a predetermined temperature and pressure. As the laminated mold 10, for example, a stainless plate can be used. Although a plate is not limited, For example, a thick board about 1-10 mm can be used. In general, CCL having four or more layers can be produced in the same process by increasing the number of inner core layers.

  Hereinafter, as a specific example of the above-described application, a method of manufacturing a coreless buildup substrate using the metal foil with carrier 11 in which the metal foil is adhered to both surfaces of the resin-made plate carrier 11c according to the present invention will be described. . In this method, after a necessary number of buildup layers 16 are laminated on both sides of the metal foil with carrier 11, the metal foils on both sides are peeled from the metal foil with carrier 11 (see FIG. 8).

  For example, on the metal foil side of the metal foil with a carrier of the present invention, a resin as an insulating layer, a two-layer circuit board, a resin as an insulating layer are sequentially stacked, and the metal foil side is in contact with the resin on the metal foil side. A buildup substrate can be manufactured by sequentially stacking the metal foils of the metal foil with a carrier of the present invention.

As another method, a resin or conductor layer as an insulating layer is provided on at least one metal foil side of the metal foil with a carrier in which the metal foil is adhered to both surfaces or one surface of the resinous plate-like carrier 11c. Are laminated in order. Next, if necessary, a step of half-etching the entire surface of the metal foil to adjust the thickness may be included. Next, laser processing is performed at a predetermined position of the laminated metal foil to form a via hole penetrating the metal foil and the resin, and after applying a desmear process for removing smear in the via hole, the bottom of the via hole, the side surface and the metal foil Electroless plating is performed on the entire surface or a part of the substrate to form an interlayer connection, and further electrolytic plating is performed as necessary. A plating resist may be formed in advance on each portion of the metal foil where electroless plating or electrolytic plating is unnecessary before performing each plating. In addition, when the electroless plating, the electrolytic plating, or the adhesion between the plating resist and the metal foil is insufficient, the surface of the metal foil may be chemically roughened in advance. When a plating resist is used, the plating resist is removed after plating. Next, a circuit is formed by removing unnecessary portions of the metal foil and the electroless plating portion and the electrolytic plating portion by etching. Thereafter, if necessary, the build-up substrate can be manufactured by cutting at a predetermined location where the metal foil of the metal foil with carrier is included in the cut surface. The process from the lamination of the resin and metal foil to the circuit formation may be repeated a plurality of times to form a multilayer build-up substrate.
Furthermore, on the outermost surface of this build-up substrate, the metal side of the metal foil with carrier in which the metal foil is adhered to one side of the present invention may be contacted and laminated, or after the resin is once laminated Alternatively, one metal foil of the metal foil with carrier in which the metal foil is adhered to both surfaces of the present invention may be brought into contact with each other and laminated. In addition, when the laminated body is finally adhered, it may be cut at a predetermined location so that the metal foil of the laminated body is included in the cut surface up to the preceding stage, but until the final laminated body is adhered You may cut so that the metal surface of all the laminated bodies may be finally included in a cut surface, without performing a cut.

  Here, a prepreg containing a thermosetting resin can be suitably used as the resin used for manufacturing the build-up substrate.

As another method, a resin as an insulating layer such as a prepreg is formed on the exposed surface of a metal foil with a carrier obtained by laminating a metal foil such as a copper foil on one or both sides of the plate-like carrier of the present invention. Alternatively, a photosensitive resin is laminated. Thereafter, a via hole is formed at a predetermined position of the resin. For example, when a prepreg is used as the resin, the via hole can be formed by laser processing. After the laser processing, desmear treatment for removing smear in the via hole is preferably performed. When a photosensitive resin is used as the resin, the resin in the via hole forming portion can be removed by a photolithography method. Next, electroless plating is performed on the bottom and side surfaces of the via holes, the entire surface or a part of the resin to form interlayer connections, and further electrolytic plating is performed as necessary. A plating resist may be formed in advance on each portion of the resin where electroless plating or electrolytic plating is unnecessary before performing each plating. Further, when the adhesion between electroless plating, electrolytic plating, plating resist and resin is insufficient, the surface of the resin may be chemically roughened in advance. When a plating resist is used, the plating resist is removed after plating. Next, an unnecessary portion of the electroless plating portion or the electrolytic plating portion is removed by etching to form a circuit. Thereafter, if necessary, the build-up substrate can be manufactured by cutting at a predetermined location where the metal foil of the metal foil with carrier is included in the cut surface. The steps from resin lamination to circuit formation may be repeated a plurality of times to form a multilayered build-up substrate.
Furthermore, on the outermost surface of this build-up substrate, the metal side of the metal foil with carrier in which the metal foil is adhered to one side of the present invention may be contacted and laminated, or after the resin is once laminated Alternatively, one metal foil of the metal foil with carrier in which the metal foil is adhered to both surfaces of the present invention may be brought into contact with each other and laminated. In addition, when the laminated body is finally adhered, it may be cut at a predetermined location so that the metal foil of the laminated body is included in the cut surface up to the preceding stage, but until the final laminated body is adhered You may cut so that the metal surface of all the laminated bodies may be finally included in a cut surface, without performing a cut.

  For the coreless build-up board manufactured in this way, the wiring is formed on the surface through the plating process and / or the etching process, and further, the build-up wiring board is separated and separated between the carrier resin and the metal foil. Is completed. Wiring may be formed on the peeling surface of the metal foil after peeling and separation, or the entire surface of the metal foil may be removed by etching to form a build-up wiring board. Furthermore, a printed circuit board is completed by mounting electronic components on the build-up wiring board. Moreover, a printed circuit board can be obtained even if an electronic component is mounted directly on a coreless buildup substrate before resin peeling.

  Experimental examples are shown below as examples and comparative examples of the present invention, but these examples are provided for better understanding of the present invention and its advantages, and are intended to limit the invention. is not.

<Experimental example 1>
A plurality of electrolytic copper foils (thickness 12 μm) were prepared, and nickel-zinc (Ni—Zn) alloy plating treatment and chromate (Cr—Zn) were performed on the shiny (S) surface of each electrolytic copper foil under the following conditions. Chromate) treatment, the ten-point average roughness (measured in accordance with JIS B 0031 (2003)) of the bonded surface (here, S surface) is 1.5 μm, and the resin is Nanya Plastic. A prepreg (FR-4 resin) manufactured by the company was bonded to the S surface of the electrolytic copper foil and hot-pressed at 170 ° C. for 100 minutes to prepare a copper foil with a carrier.

(Nickel-zinc alloy plating)
Ni concentration 17g / L (added as NiSO ₄ )
Zn concentration 4g / L (added as ZnSO ₄ )
pH 3.1
Liquid temperature 40 ℃
Current density 0.1-10A / dm ²
Plating time 0.1 to 10 seconds

(Chromate treatment)
Cr concentration 1.4g / L (added as CrO ₃ or K ₂ CrO ₇ )
Zn concentration 0.01 to 1.0 g / L (added as ZnSO ₄ )
Na ₂ SO ₄ concentration 10 g / L
pH 4.8
Liquid temperature 55 ℃
Current density 0.1-10A / dm ²
Plating time 0.1 to 10 seconds

Regarding the treatment of the mold release agent on the S surface or the plate carrier, an aqueous solution of the mold release agent is applied using a spray coater, and then the copper foil surface is dried in air at 100 ° C. Was pasted together. Regarding the use conditions of the release agent, the type of release agent, the stirring time from when the release agent is dissolved in water to before application, the concentration of the release agent in the aqueous solution, the alcohol concentration in the aqueous solution, the pH of the aqueous solution Is shown in Table 1.
Further, the formation of the release material resin coating on the S surface or the plate-like carrier is performed by applying a composition for a resin coating having the composition shown in Table 1 by a gravure coating method, and then using a doctor blade. The thickness was adjusted to 2-4 μm. Moreover, the applied resin coating film was baked by heating at 150 ° C. for 30 seconds. The epoxy resin shown in Table 1 is a bisphenol A type epoxy resin, the melamine resin is a methyl etherified melamine resin, the fluororesin is polytetrafluoroethylene, and the dimethyl silicone resin is dimethyl Polysiloxane was used.

  Further, assuming that the copper foil with carrier is subjected to a heat history during further heat treatment such as circuit formation with respect to the metal foil with carrier, the conditions described in Table 1 (here, 3 at 220 ° C.) Heat treatment).

  The peel strength between the copper foil and the plate-like carrier (resin after heating) in the copper foil with carrier obtained by hot pressing and the copper foil with carrier after further heat treatment was measured. The results are shown in Table 1.

  Moreover, in order to evaluate peeling workability | operativity, the work time (time / piece) by the unit number per unit was evaluated. The results are shown in Table 2.

<Experimental Examples 2-12>
Using the copper foil, resin (prepreg) and release agent shown in Table 1, a carrier-attached copper foil was produced in the same procedure as in Experimental Example 1. In Experimental Examples 3, 7, and 10, the release agent was applied on the plate carrier. Moreover, the heat processing of the conditions shown in Table 1 was performed. Each was evaluated in the same way as in Experimental Example 1. The results are shown in Tables 1 and 2.
In Experimental Example 12, a copper foil and a resin (prepregs ~ were bonded to each other to produce a copper foil with a carrier without using either a release agent or a release material, and the same evaluation as in Experimental Example 1 was performed. .

  In addition, as shown in Table 1, the type of the bonding surface of the copper foil, the condition of the surface treatment and the surface roughness Rz jis, the use condition of the release agent, the type of the prepreg, and the lamination condition of the copper foil and the prepreg It is.

  In the surface treatment conditions of the copper foil mat (M) surface opposite to the bonding surface with the plate-like carrier, specific conditions for epoxysilane (treatment) and roughening treatment are as follows.

(Epoxysilane treatment)
Treatment liquid: 0.9 volume% aqueous solution of 3-glycidoxypropyltrimethoxysilane
pH 5.0-9.0
Stirred at room temperature for 12 hours Treatment method: After applying the treatment liquid using a spray coater, the treated surface is dried in air at 100 ° C. for 5 minutes.

(Roughening treatment)
Cu concentration 20 g / L (added as CuSO ₄ )
H ₂ SO ₄ concentration 50-100g / L
As concentration 0.01-2.0 g / L (added as arsenous acid)
Liquid temperature 40 ℃
Current density 40-100A / dm ²
Plating time 0.1-30 seconds

  According to the table, the release agent can be processed on the surface of the copper foil or the surface of the plate carrier (prepreg), and then the peel strength of the laminate, the peel strength after heating, the peel It can be seen that the same results were obtained in workability.

  In Experimental Example 1, a prepreg having a thickness of 200 μm was used as the plate carrier when the plate carrier (prepreg) and the copper foil were laminated. The prepreg and the copper foil had an octagonal shape cut off by a straight line connecting two points on the edge at a distance of 25 mm from each vertex of a 550 mm square. The positional relationship between the prepreg and the copper foil was such that the center of the copper foil and the center position of the prepreg were matched, and the sides of the copper foil and the side of the prepreg were arranged parallel to each other (the mode of FIG. 5). Copper foil was laminated on both sides of the prepreg.

  Moreover, in Experimental Examples 2 to 10, except that each vertex of a 550 mm square prepreg and copper foil was processed into an arc shape with a curvature radius of 25 mm, and a shape surrounded by a straight line and an arc was used. A copper foil and a prepreg were laminated under the same conditions (the embodiment of FIG. 3). Copper foil was laminated on both sides of the prepreg.

  In Experimental Example 11, the copper foil and the prepreg were laminated under the same conditions as in Experimental Example 1 except that the prepreg and the copper foil had a circular shape with a radius of 300 mm (not shown). Copper foil was laminated on both sides of the prepreg.

  A hole having a diameter of 1 mm was formed in four portions of the copper foil with carrier thus produced where the plate-like carrier was exposed, and used as a guide hole for positioning in the subsequent build-up process.

FR-4 prepreg (manufactured by Nanya Plastic Co., Ltd.) and copper foil (manufactured by JX Nippon Mining & Metals Co., Ltd., JTC 12 μm (product name)) are sequentially stacked on both sides of the copper foil with carrier thus produced. A four-layer copper-clad laminate was produced by hot pressing at 170 ° C. for 100 minutes at a pressure of 150 ° C.

  Next, a 100 μm diameter hole penetrating the copper foil on the surface of the four-layer copper-clad laminate and the insulating layer (cured prepreg) thereunder was drilled using a laser processing machine. Subsequently, electroless copper plating on the copper foil surface on the copper foil with carrier exposed at the bottom of the hole, the side surface of the hole, and the copper foil on the surface of the four-layer copper-clad laminate, and copper plating by electrolytic copper plating The electrical connection was formed between the copper foil on the copper foil with a carrier and the copper foil on the surface of the four-layer copper-clad laminate. Next, a part of the copper foil on the surface of the four-layer copper-clad laminate was etched using a ferric chloride-based etchant to form a circuit. In this manner, a four-layer buildup substrate can be produced.

  Subsequently, after cutting the four-layer build-up substrate at a position on the copper foil of the carrier-attached copper foil, the plate-like carrier and the copper foil of the copper foil with carrier are separated and separated into two sets. A two-layer build-up wiring board was obtained.

<Experimental example 13>
In Experimental Example 1, a copper foil with a carrier was prepared using the same copper foil, release agent and prepreg as in Experimental Example 1 except that both the copper foil and the prepreg had a 550 mm square shape. A two-layer build-up wiring board was obtained by the same procedure as in Experimental Example 1.

In each experimental example, a plurality of four-layer build-up substrates were produced, and for each of the examples, when the adhesion between the prepreg and the copper foil constituting the carrier-added copper foil in the build-up substrate manufacturing process was visually confirmed, Experimental Example 13 There were more things in the state of being peeled off at the interface between the prepreg and the copper foil than those obtained in Experimental Examples 1-11.
In addition, when Experimental Example 13 and Experimental Example 1 were compared, Experimental Example 1 had a smaller number of states that were about to peel off at the interface between the prepreg and the copper foil.
Further, comparing Experimental Example 1 with Experimental Examples 2 to 11, Experimental Examples 2 to 11 had a smaller number of states that were about to peel off at the interface between the prepreg and the copper foil.

DESCRIPTION OF SYMBOLS 10 Laminated metal mold 11 Metal foil with carrier 11a Metal foil 11b Mold release agent or release material 11c Plate carrier 12 Prepreg 13 Inner core core 14 Page 15 Book 16 Build-up layer 20 Metal foil with carrier 21 Plate carrier 22 Metal Foil 30 Metal foil 31 with carrier Plate carrier 32 Metal foil

Claims (75)

A metal foil with a carrier made of a resin-made plate-like carrier and a metal foil that is peelably adhered to at least one surface of the carrier,
A metal foil with a carrier having a shape in which the metal foil and the plate-like carrier have the same shape and have no corner (vertex) having an inner angle of 90 degrees or less when seen in a plan view. The metal foil with a carrier according to claim 1,
The metal foil with a carrier which is the shape where the said metal foil and the said plate-shaped carrier were the same shape when it planarly viewed, and were enclosed by the straight line and the curve. A metal foil with a carrier according to claim 2,
A metal foil with a carrier, wherein the metal foil and the plate-like carrier have the same shape when viewed in plan, and the curve is an arc or an elliptical arc. The metal foil with a carrier according to claim 1,
A metal foil with a carrier, wherein the metal foil and the plate-like carrier have the same shape when viewed in a plan view, and all the internal angles are polygonal shapes having an angle larger than 90 degrees. The metal foil with a carrier according to claim 4,
The metal foil with a carrier which is a convex polygonal shape in which the metal foil and the plate-like carrier have the same shape when viewed in a plane, and all inner angles are larger than 90 degrees and smaller than 180 degrees. The metal foil with a carrier according to claim 1,
The metal foil with a carrier which is the shape where the said metal foil and the said plate-shaped carrier were the same shape when it planarly viewed, and were only enclosed by the curve.   The metal foil with a carrier according to any one of claims 1 to 6, wherein the peel strength between the plate-like carrier and the metal foil is 10 gf / cm or more and 200 gf / cm or less.   The metal foil with a carrier according to any one of claims 1 to 7, wherein the resinous plate-like carrier contains a thermosetting resin.   The resin-made plate-shaped carrier is a prepreg, and the metal foil with a carrier according to any one of claims 1 to 7.   The metal foil with a carrier according to claim 8 or 9, wherein the plate-like carrier has a glass transition temperature Tg of 120 to 320 ° C.   The metal foil with a carrier according to any one of claims 1 to 10, wherein a ten-point average roughness (Rz jis) of a side surface in contact with the carrier of the metal foil is 3.5 µm or less.   The metal with a carrier according to any one of claims 1 to 11, wherein a ten-point average roughness (Rz jis) of a surface of the metal foil not contacting the carrier is 0.4 µm or more and 10.0 µm or less. Foil.   The thickness of the said metal foil is 1 micrometer or more and 400 micrometers or less, Metal foil with a carrier as described in any one of Claims 1-12.   The thickness of the said plate-shaped carrier is 5 micrometers or more and 1000 micrometers or less, Metal foil with a carrier as described in any one of Claims 1-13.   The metal foil with a carrier according to any one of claims 1 to 14, wherein about 1 to 10 holes having a diameter of about 0.01 mm to 10 mm are provided in a region to be cut and removed when viewed in a plan view.   The metal foil with a carrier according to any one of claims 1 to 15, wherein the plate-like carrier and the metal foil are bonded together using a release agent. The release agent has the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
The metal foil with a carrier of Claim 16 which uses the silane compound shown to these, its hydrolysis product, and the condensate of this hydrolysis product individually or in combination.   The metal foil with a carrier according to claim 16, wherein the release agent is a compound having two or less mercapto groups in the molecule. The release agent has the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
The metal foil with a carrier according to claim 16, wherein the aluminate compound, titanate compound, zirconate compound, hydrolysis products thereof, and condensates of the hydrolysis products are used alone or in combination.   Claims obtained by laminating a plate-like carrier and a metal foil using a resin coating film composed of silicone and any one or a plurality of resins selected from epoxy resins, melamine resins and fluororesins. Item 16. A metal foil with a carrier according to any one of Items 1 to 15.   21. The peel strength between the metal foil and the plate-like carrier after heating at 220 ° C. for 3 hours, 6 hours, or 9 hours is 10 gf / cm or more and 200 gf / cm or less. A metal foil with a carrier according to claim 1.   The metal foil with a carrier according to any one of claims 1 to 21, wherein the metal foil is a copper foil. When viewed from above, the following formula is applied to the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
The metal foil for coreless multilayer printed wiring boards which has the silane compound shown in 1 above, its hydrolysis product, and the condensate of this hydrolysis product individually or in combination.   A metal foil for a coreless multilayer printed wiring board having a compound having two or less mercapto groups in the molecule on the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less when viewed in plan . When viewed from above, the following formula is applied to the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A metal foil for a coreless multilayer printed wiring board having the aluminate compound, titanate compound, zirconate compound, hydrolyzed products thereof, and condensates of the hydrolyzed products alone or in combination.   Any one selected from silicone, epoxy resin, melamine resin, and fluororesin on the surface of the metal foil having an angle (vertex) having an internal angle of 90 degrees or less when viewed in plan or A metal foil for a coreless multilayer printed wiring board having a resin coating composed of a plurality of resins.   Chromate treatment is performed on the surface of the metal foil on the side on which the compound or resin coating film according to any one of claims 23 to 26 is applied before the compound or resin coating film is applied. A metal foil for coreless multilayer printed wiring boards. A metal foil for a coreless multilayer printed wiring board according to any one of claims 23 to 27,
27. A coreless multilayer printed wiring in which the metal foil has a ten-point average roughness (Rz jis) of 3.5 μm or less on the surface on which the compound or resin coating film is applied. Metal foil for plates. A metal foil for a coreless multilayer printed wiring board according to any one of claims 23 to 28,
27. The ten-point average roughness (Rz jis) of the surface of the metal foil on the side on which the compound or resin coating film according to any one of claims 23 to 26 does not act is 0.4 μm or more and 10.0 μm or less. Metal foil for coreless multilayer printed wiring boards.   The metal foil for a coreless multilayer printed wiring board according to any one of claims 23 to 29, wherein the metal foil is a copper foil. When viewed from above, the following formula is applied to the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
A metal foil having a silane compound, a hydrolysis product thereof, and a condensate of the hydrolysis product alone or in combination, wherein the resin plate carrier is adhered to the surface in a peelable manner. Metal foil used in   A metal foil having a compound having two or less mercapto groups in the molecule on the surface of the metal foil having an angle (vertex) having an inner angle of 90 degrees or less when viewed in plan, Metal foil used for applications in which a resin-made plate-like carrier is peeled and adhered. When viewed from above, the following formula is applied to the surface of the metal foil having a shape having no corner (vertex) having an inner angle of 90 degrees or less:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A metal foil having an aluminate compound, a titanate compound, a zirconate compound, a hydrolysis product thereof, a condensate of the hydrolysis product, or a combination of a plurality of the hydrolysis products. Metal foil used for applications in which the carrier is peelably adhered.   Any one selected from silicone, epoxy resin, melamine resin, and fluororesin on the surface of the metal foil having an angle (vertex) having an internal angle of 90 degrees or less when viewed in plan or A metal foil having a resin coating film composed of a plurality of resins, the metal foil being used in such a manner that a plate-like carrier made of resin is detachably attached to the surface. The metal foil according to any one of claims 31 to 34,
A chromate treatment is performed on the surface of the metal foil on the side on which the compound or resin coating film according to any one of claims 28 to 33 is applied before the compound or resin coating film is applied. Metal foil characterized by. The metal foil according to any one of claims 31 to 35,
A metal foil having a ten-point average roughness (Rz jis) of 3.5 μm or less on a surface on which the compound or resin coating film according to any one of claims 28 to 33 is applied.   The said metal foil is a copper foil, The metal foil for printed wiring boards as described in any one of Claims 31-36. On at least one surface of a resinous plate-like carrier having a shape having no internal angle (vertex) having an internal angle of 90 degrees or less when seen in a plan view, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
A plate-like carrier having a silane compound, a hydrolysis product thereof, and a condensate of the hydrolysis product alone or in combination.   A plate having a compound having two or less mercapto groups in the molecule on at least one surface of a resin-made plate-like carrier having an angle (vertex) having an inner angle of 90 degrees or less when viewed in plan Carrier. On at least one surface of a resinous plate-like carrier having a shape having no internal angle (vertex) having an internal angle of 90 degrees or less when seen in a plan view, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A plate carrier having an aluminate compound, a titanate compound, a zirconate compound, a hydrolysis product thereof, and a condensate of the hydrolysis product, either alone or in combination.   Select from silicone, epoxy resin, melamine resin, and fluororesin on at least one surface of a resinous plate-like carrier that has an inner angle of 90 degrees or less (vertex) when viewed in plan A plate-like carrier having a resin coating film composed of any one or a plurality of resins. On at least one surface of a resinous plate-like carrier having a shape having no internal angle (vertex) having an internal angle of 90 degrees or less when seen in a plan view, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by R ³ and R ⁴ are each independently a halogen atom, an alkoxy group, or a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group, and an aryl group Or any one of these hydrocarbon groups in which one or more hydrogen atoms are replaced by halogen atoms.)
Is a plate-like carrier having a silane compound, a hydrolysis product thereof, or a condensate of the hydrolysis product alone or in combination, and is used for the purpose of releasably adhering a metal foil on the surface. Plate carrier.   A plate having a compound having two or less mercapto groups in the molecule on at least one surface of a resin-made plate-like carrier having an angle (vertex) having an inner angle of 90 degrees or less when viewed in plan A plate-like carrier that is used for the purpose of releasably attaching a metal foil on the surface. On at least one surface of a resinous plate-like carrier having a shape having no internal angle (vertex) having an internal angle of 90 degrees or less when seen in a plan view, the following formula:

Wherein R ¹ is an alkoxy group or a halogen atom, and R ² is a hydrocarbon group selected from the group consisting of an alkyl group, a cycloalkyl group and an aryl group, or one or more hydrogen atoms are halogen atoms Any one of these hydrocarbon groups substituted by: M is any one of Al, Ti, Zr, n is 0 or 1 or 2, m is an integer from 1 to M valence, At least one of R1 is an alkoxy group, where m + n is the valence of M, that is, 3 for Al and 4 for Ti and Zr)
A plate-like carrier having an aluminate compound, a titanate compound, a zirconate compound, a hydrolysis product thereof, or a condensate of the hydrolysis product as shown in FIG. A plate-like carrier used for close contact.   Select from silicone, epoxy resin, melamine resin, and fluororesin on at least one surface of a resinous plate-like carrier that has an inner angle of 90 degrees or less (vertex) when viewed in plan A plate-shaped carrier having a resin coating film composed of any one or a plurality of resins, and used for the purpose of releasably attaching a metal foil on the surface.   A multilayer including laminating a resin on at least one metal foil side of the metal foil with a carrier according to any one of claims 1 to 22, and then laminating the resin or the metal foil repeatedly one or more times. A method for producing a metal-clad laminate.   A resin is laminated on the metal foil side of the metal foil with a carrier according to any one of claims 1 to 22, and then a resin, a single-sided or double-sided metal-clad laminate, and the carrier according to any one of claims 1 to 22. A method for producing a multilayer metal-clad laminate comprising attaching a metal foil, a laminate in which a metal foil is laminated on the surface of a resin, or laminating a metal foil repeatedly one or more times.   48. The method for producing a multilayer metal-clad laminate according to claim 46 or 47, wherein cutting is performed on a laminate surface of a plate-like carrier and a metal foil in the metal foil with a carrier or a laminate surface of a resin and a metal foil in the laminate. The manufacturing method of the multilayer metal-clad laminated board including the process to do.   48. The method for producing a multilayer metal-clad laminate according to claim 46 or 47, further comprising a step of peeling and separating the plate-like carrier of the metal foil with carrier and the metal foil.   49. In the manufacturing method according to claim 48, the step of separating and separating the plate-like carrier and metal foil of the metal foil with carrier after cutting or the resin and metal foil in the laminate after cutting are separated. A method for producing a multilayer metal-clad laminate, further comprising a step of separating.   51. The method of manufacturing a multilayer metal-clad laminate according to claim 49 or 50, comprising a step of removing a part or all of the separated and separated metal foil by etching. A metal foil with a carrier according to any one of claims 1 to 22, a resin provided on a surface side of at least one metal foil of the metal foil with a carrier, and a resin or a metal further provided on the resin A multilayer metal-clad laminate including a layer having one or more layers .   The manufacturing method of a buildup board | substrate including the process of forming one or more buildup wiring layers in the metal foil side of the metal foil with a carrier as described in any one of Claims 1-22.   54. The buildup board manufacturing method according to claim 53, wherein the buildup wiring layer is formed using at least one of a subtractive method, a full additive method, and a semi-additive method.   A resin is laminated on the metal foil side of the metal foil with a carrier according to any one of claims 1 to 22, and then a resin, a single-sided or double-sided wiring board, a single-sided or double-sided metal-clad laminate, The manufacturing method of the buildup board | substrate including repeating the metal foil with a carrier in any one, the laminated body which laminated | stacked metal foil on the surface of resin, or repeating metal foil once or more.   56. The method for manufacturing a build-up board according to claim 55, wherein the single-sided or double-sided wiring board, the single-sided or double-sided metal-clad laminate, the metal foil of the metal foil with carrier, the plate carrier of the metal foil with carrier, the metal foil of the laminate The manufacturing method of the buildup board | substrate which further includes the process of drilling a hole in the plate-shaped carrier of a laminated body, metal foil, or resin, and carrying out conductive plating to the side surface and bottom face of the said hole.   57. The method for manufacturing a buildup board according to claim 55 or 56, wherein the metal foil constituting the single-sided or double-sided wiring board, the metal foil constituting the single-sided or double-sided metal-clad laminate, and the metal constituting the metal foil with carrier The manufacturing method of the buildup board | substrate which further includes performing the process of forming wiring in at least one of foil, the metal foil which comprises a laminated body, and metal foil once or more.   The laminated body which laminated | stacked metal foil on the carrier side of the metal foil with a carrier as described in any one of Claims 1-22, or metal single side | surface on which the metal foil was made to closely_contact | adhere on the surface in which wiring was formed. The manufacturing method of the buildup board | substrate as described in any one of Claims 55-57 further including the process of contacting and laminating | stacking the resin side.   The metal foil with a carrier according to any one of claims 1 to 22, wherein the resin is laminated on the surface on which the wiring is formed, and the metal foil is adhered to both surfaces of the resin, or the metal foil on both surfaces of the resin. The manufacturing method of the buildup board | substrate as described in any one of Claims 55-57 which further includes the process of contacting and laminating | stacking the laminated body which laminated | stacked.   60. The method for manufacturing a buildup substrate according to any one of claims 55 to 59, wherein at least one of the resins is a prepreg.   A laminate surface of a plate-like carrier and a metal foil in the metal foil with a carrier or a resin and a metal foil in the laminate with respect to the build-up substrate obtained by the method according to any one of claims 53 to 60. The manufacturing method of the buildup wiring board including the process cut | disconnected in the laminated surface.   A build-up wiring further comprising a step of peeling and separating the plate-like carrier of the metal foil with carrier and the metal foil from the build-up substrate obtained by the method according to any one of claims 53 to 60. A manufacturing method of a board.   62. The manufacturing method according to claim 61, wherein the plate-like carrier of the metal foil with a carrier after cutting and the metal foil are separated and separated, or the resin and the metal foil in the laminate after the cutting are separated and separated. The manufacturing method of the buildup wiring board which further includes the process to do.   64. The method for manufacturing a buildup wiring board according to claim 62 or 63, further comprising a step of removing a part or all of the metal foil that has been in close contact with the plate carrier by etching.   A method for producing a printed circuit board, comprising a step of producing a build-up wiring board by the method according to any one of claims 61 to 64. A metal foil with a carrier according to any one of claims 1 to 22, a resin provided on a surface side of at least one metal foil of the metal foil with a carrier, a resin, a single-sided or double-sided metal-clad laminate, A multilayer metal comprising the metal foil with a carrier according to any one of claims 1 to 22, a laminate in which a metal foil is laminated on the surface of a resin, or a layer having one or more layers selected from the metal foil. Tension laminate. The multilayer metal-clad laminate according to claim 52 or 66, wherein the laminate is cut at a laminated surface of a plate-like carrier and a metal foil in the metal foil with a carrier or a laminated surface of a resin and a metal foil in the laminated body. Multi-layer metal-clad laminate. 23. A metal foil with a carrier according to any one of claims 1 to 22, and a layer having at least one build-up wiring layer provided on the surface side of at least one metal foil of the metal foil with a carrier. Build-up board. A metal foil with a carrier according to any one of claims 1 to 22, a resin provided on a surface side of at least one metal foil of the metal foil with a carrier, a resin, a single-sided or double-sided wiring board, a single-sided or One or more layers selected from a double-sided metal-clad laminate, a metal foil with a carrier according to any one of claims 1 to 22, or a laminate in which a metal foil is laminated on the surface of a resin, or a metal foil. A build-up substrate comprising: a layer having; 70. The build-up board according to claim 69, wherein the single-sided or double-sided wiring board, single-sided or double-sided metal-clad laminate, metal foil with carrier, metal foil with carrier, plate-like carrier with laminate, laminate metal foil, laminate A build-up substrate having conductive plating on the side and bottom surfaces of holes formed in a plate carrier, metal foil, or resin. 71. The build-up board according to claim 69 or 70, wherein the metal foil constituting the single-sided or double-sided wiring board, the metal foil constituting the single-sided or double-sided metal-clad laminate, and the metal foil constituting the metal foil with carrier, laminated A build-up substrate having one or more layers having a metal foil constituting the body and a wiring made of at least one of the metal foils. 23. With a carrier according to any one of claims 1 to 22, comprising a plate-like carrier laminated on the surface of the formed wiring, and a metal foil in close contact with a surface different from the surface comprising the plate-like carrier. The metal foil or a laminate that includes a resin laminated on the surface of the formed wiring, and further includes a laminate in which the metal foil is laminated on a surface different from a surface that includes the resin. Build-up board as described in The metal foil with a carrier according to any one of claims 1 to 22, wherein a metal foil is adhered to both surfaces of the resin provided on the surface of the formed wiring, and further provided on the surface of the resin, or The buildup substrate according to any one of claims 69 to 71, comprising a laminate in which metal foil is laminated on both surfaces of the resin. 74. The buildup substrate according to any one of claims 69 to 73, wherein at least one of the resins is a prepreg. The buildup substrate according to any one of claims 69 to 74, wherein a laminate surface of a plate-like carrier and a metal foil in a metal foil with a carrier of the buildup substrate or a laminate of a resin and a metal foil in the laminate. Build-up wiring board cut at the surface.

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