WO2018216433A1 - 被処理部材の製造方法および積層体 - Google Patents
被処理部材の製造方法および積層体 Download PDFInfo
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- WO2018216433A1 WO2018216433A1 PCT/JP2018/017195 JP2018017195W WO2018216433A1 WO 2018216433 A1 WO2018216433 A1 WO 2018216433A1 JP 2018017195 W JP2018017195 W JP 2018017195W WO 2018216433 A1 WO2018216433 A1 WO 2018216433A1
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Classifications
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/27—Manufacturing methods
- H01L2224/275—Manufacturing methods by chemical or physical modification of a pre-existing or pre-deposited material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/27—Manufacturing methods
- H01L2224/276—Manufacturing methods by patterning a pre-deposited material
- H01L2224/27602—Mechanical treatment, e.g. polishing, grinding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/40—Details of apparatuses used for either manufacturing connectors or connecting the semiconductor or solid-state body
- H01L2924/401—LASER
- H01L2924/402—Type
- H01L2924/404—Type being a solid state
- H01L2924/40404—Yttrium Aluminium Garnet Nd:YAG LASER
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
- Y10T156/1153—Temperature change for delamination [e.g., heating during delaminating, etc.]
Definitions
- the present invention relates to a method of manufacturing a member to be processed for performing a treatment such as a smoothing treatment on both surfaces of a member to be processed containing a metal oxide, and a laminate used for a method of manufacturing a member to be processed.
- the present invention relates to a method for manufacturing a member to be processed in which a treatment such as a smoothing process is performed on both surfaces even if the member to be processed containing an oxide is fragile, and a laminate used in the method for manufacturing a member to be processed.
- treatment such as smoothing has been performed on both surfaces of a member to be treated such as a substrate.
- the smoothing process on both sides of the substrate will be described using the substrate as an example.
- 48 to 54 are schematic views showing a conventional method of processing a member to be processed in the order of steps.
- 48 to 54 are schematic views showing one process of the conventional processing method for a member to be processed.
- the 1st support body 100 is prepared.
- the first support 100 for example, a glass substrate or a silicon wafer is used.
- the first temporary adhesive layer 102 is provided on the first support 100.
- the first temporary adhesive layer 102 is composed of a temporary adhesive or a temporary adhesive sheet whose adhesive strength is reduced by exposure or heating.
- the substrate 104 is bonded to the first temporary adhesive layer 102 with the back surface 104b facing the first temporary adhesive layer 102 as shown in FIG. In this state, the surface 104a of the substrate 104 is subjected to a smoothing process such as polishing or grinding.
- a second support 106 is prepared.
- the first support body 100 for example, a glass substrate or a silicon wafer is used for the second support body 106.
- a second temporary adhesive layer 108 is provided on the second support 106. Similar to the first temporary adhesive layer 102, the second temporary adhesive layer 108 is composed of a temporary adhesive or a temporary adhesive sheet whose adhesive force is reduced by exposure or heating.
- the substrate 104 is bonded to the second temporary adhesive layer 108 with the front surface 104 a facing the second temporary adhesive layer 108.
- the back surface 104b of the substrate 104 is subjected to a smoothing process such as polishing or grinding. In this manner, both surfaces of the substrate 104 are smoothed.
- the following methods have been proposed as a method for smoothing both surfaces of a substrate and the like.
- a thin film brittle material having a thickness of 500 ⁇ m or less and a Young's modulus of 1.0 ⁇ 10 8 or more is fixed on one surface and the other surface is polished.
- the fixing surface that is in contact with the fixed surface of the thin film brittle material is provided with irregularities having a depth or height of 5 to 100 ⁇ m and a pitch of 30 to 2000 ⁇ m, and the surface to be fixed and the surface to be polished are changed mutually.
- at least one surface is polished twice or more to polish both surfaces.
- Patent Document 1 As a thin film brittle material, a structure mainly composed of an anodized film is cited.
- a WAX adhesive alco wax manufactured by Nikka Seiko Co., Ltd.
- the surface opposite to the attachment surface is polished, and the polished surface is used as a fixing member. After attaching and fixing using an adhesive, it is described that the other surface is polished.
- Patent Document 2 In the method for manufacturing a semiconductor device disclosed in Patent Document 2, a step of temporarily bonding a first surface of a semiconductor wafer to a first substrate via a first adhesive, a side surface of the first adhesive is exposed, and a side surface of the second adhesive is A step of temporarily bonding a second surface opposite to the first surface of the semiconductor wafer to the second substrate via a second adhesive so as not to be exposed; and the first substrate in a state where the semiconductor wafer is temporarily bonded to the second substrate And a step of peeling off the semiconductor wafer from the semiconductor wafer.
- Patent Document 2 is a manufacturing method further including a step of polishing the second surface in a state of being temporarily bonded to the first substrate.
- JP 2010-149211 A Japanese Patent Laying-Open No. 2015-201548
- the substrate 104 when the substrate 104 is a thin and fragile material, the substrate 104 is peeled off from the first support 100 when the substrate 104 is transferred, and the smoothing process is performed. There is a risk that the substrate 104 may be damaged such as deformation or destruction when the surface 104a subjected to is attached to the second temporary adhesive layer 108. In addition, the risk increases as the size of the substrate 104 increases. In particular, when the substrate 104 is made of a material having low brittleness such as a metal oxide, the increase in the risk described above is significant. When the substrate 104 is deformed or broken as described above, the production stability is lowered, the yield is lowered, and the productivity is lowered. This increases production costs.
- Patent Document 1 after fixing a thin film brittle material to a fixing member using a WAX adhesive, the surface opposite to the pasting surface is polished, and the polished surface is used as a WAX. After attaching and fixing using an adhesive, it is described that the other surface is polished. In this case, it is necessary to peel off the other surface that has not been polished and the fixing member, but since both the polished surface and the other surface are fixed with the same adhesive, only the unpolished surface It is difficult to peel off with.
- the above-mentioned patent document 2 is intended for semiconductors, and may not be compatible with fragile materials such as being less brittle than semiconductors. As described above, when a smoothing process is performed on both sides of a fragile material having low brittleness, it cannot be stably performed.
- the object of the present invention is to solve the above-mentioned problems based on the prior art, and to stably perform a treatment such as a smoothing treatment on both sides even if a member to be treated containing a metal oxide is fragile.
- An object of the present invention is to provide a method for manufacturing a member to be processed and a laminate.
- the present invention provides a first joining step for joining a member to be processed containing a metal oxide and a first support using a first adhesive layer, and a metal oxide.
- a second bonding step for bonding using layers and a second surface processing step for forming a second processed surface on the back surface of the first processed surface by processing a member to be processed containing a metal oxide.
- the adhesive support or adsorption support and the first processed surface are brought into contact with each other.
- the method includes a step of removing the support or adsorbing support having adhesiveness, and between the first surface contact step and the second bonding step, or between the second bonding step and the second surface processing step.
- the present invention provides a method for manufacturing a member to be processed, which includes a first adhesive layer removing step of removing the first adhesive layer from the member to be processed containing a metal oxide.
- the first surface contact step includes a step of supporting the first processing surface using a temporary support having adhesiveness or a member to be processed containing a metal oxide by using an adsorption support, and the first processing surface supports the first processing surface. In this state, it is preferable that the first adhesive layer is removed. It is preferable that a first adhesive layer alteration step for reducing the adhesive force of the first adhesive layer is included between the first surface processing step and the first adhesive layer removing step. It is preferable that the first adhesive layer alteration step includes at least one of exposure and heating. It is preferable to include a second adhesive layer alteration step for reducing the adhesive force of the second adhesive layer after the second surface processing step. It is preferable that the second adhesive layer alteration step includes at least one of exposure and heating. It is preferable to include a first adhesive layer removing step between the second bonding step and the second surface processing step.
- a first transfer step of transferring a first processed surface of a member to be processed containing a metal oxide to a first transfer support between the first surface processing step and the second bonding step; and a first adhesive layer The removal process and the transferred state of the first processed surface by the first transfer support are released, and the portion other than the first processed surface of the member to be processed containing the metal oxide is transferred to the second transfer support. It is preferable to include the second transfer step in this order. It is preferable that at least one of the first transfer support and the second transfer support is a temporary support having adhesiveness. It is preferable that at least one of the first transfer support and the second transfer support is an adsorption support that adsorbs a member to be processed containing a metal oxide.
- the second bonding step is a step of sticking the second support to the second adhesive layer provided on the first processed surface of the member to be processed containing the metal oxide.
- the second joining step is preferably a step of attaching a member to be treated containing a metal oxide to the second adhesive layer provided on the second support.
- the first joining step is a step of attaching a member to be processed containing a metal oxide to the first adhesive layer provided on the first support.
- the member to be treated containing a metal oxide preferably contains a conductor. It is preferable that the conductor contains an unoxidized metal.
- the metal oxide preferably contains a metal element other than the unoxidized metal.
- the unoxidized metal is preferably a transition metal.
- the metal oxide is preferably a base metal oxide.
- Both the first processed surface and the second processed surface are preferably surfaces having an arithmetic average roughness of 1 ⁇ m or less.
- the second surface processing step is preferably a step of processing a surface in contact with the first adhesive layer among the surfaces of the member to be processed containing a metal oxide. It is preferable that the adhesive force of the first adhesive layer is always smaller than the adhesive force of the second adhesive layer.
- At least one of the first support and the second support preferably has at least one transmission region, and the transmission region preferably has a transmittance of 70% or more in a wavelength range of 200 to 500 nm.
- the distance between the first processed surface and the second processed surface in the member to be processed containing the metal oxide is preferably 50 ⁇ m or less.
- the exposure is preferably laser irradiation or ultraviolet irradiation. It is preferable that at least one of the first adhesive layer and the second adhesive layer includes a material that reduces the adhesiveness of the adhesive layer by heating.
- This invention provides the laminated body used for the manufacturing method of the to-be-processed member of this invention which has a to-be-processed member containing a 1st support body, a 1st contact bonding layer, and a metal oxide in this order. .
- a smoothing process or the like can be stably performed on both sides thereof.
- FIG. 1 to 7 are schematic views showing a first example of a method of manufacturing a member to be processed according to an embodiment of the present invention in the order of steps.
- FIG. 1 to FIG. 7 are schematic views showing one process of the first example of the method for manufacturing a member to be processed according to the embodiment of the present invention.
- an anisotropic conductive member will be described as an example of the member to be processed containing a metal oxide.
- the substrate 14 will be described.
- the substrate 14 is described as an example of a disk, but the shape is not limited to a disk.
- the anisotropic conductive member is a brittle material having an insulating substrate 40 (see FIG. 8) composed of an anodized film or the like. Moreover, the member to be processed containing the metal oxide is not limited to the anisotropic conductive member. The anisotropic conductive member will be described in detail later.
- a first support 10 is prepared.
- the first support 10 supports the substrate 14 and has a size capable of supporting the substrate 14.
- the first support 10 has a circular shape, for example.
- a glass substrate, a quartz glass substrate, or a silicon substrate is used.
- the first adhesive layer 12 is attached to the surface 10 a of the first support 10.
- the first adhesive layer 12 is not particularly limited as long as it is a peelable adhesive layer.
- the peelable adhesive layer may be a peelable double-sided adhesive film, an adhesive layer with low adhesiveness, or an adhesive layer whose adhesiveness is reduced by at least one of exposure and heating. May be. It is preferably an adhesive layer whose adhesiveness is reduced by at least one of exposure and heating.
- the adhesive layer whose adhesiveness is reduced by heating examples include Riva Alpha (registered trademark) manufactured by Nitto Denko Corporation or Somatack (registered trademark) manufactured by Somar Corporation.
- Riva Alpha registered trademark
- Somatack registered trademark
- the first adhesive layer 12 can also be formed using an adhesive composition having a function of reducing adhesiveness, such as a reduction in adhesive force due to at least one of exposure and heating.
- the exposure includes laser irradiation with laser light and ultraviolet irradiation using ultraviolet light.
- the first adhesive layer 12 may have a configuration in which a self-peeling layer and a double-sided pressure-sensitive adhesive sheet are combined, for example.
- a self-peeling layer and a double-sided pressure-sensitive adhesive sheet are combined, for example.
- Hitachi Maxell, Ltd. No. 636000 dicing tape
- a tape mounter is used to apply the first adhesive layer 12.
- a substrate 14, which is a member to be processed, containing a metal oxide is applied to the surface 12 a of the first adhesive layer 12 provided on the first support 10.
- the second surface 14b is directed and bonded to the first adhesive layer 12 in a vacuum atmosphere using, for example, a vacuum bonding apparatus (not shown).
- substrate 14 in this order as shown in FIG. 3 is used for the manufacturing method of the to-be-processed member of this invention.
- the step shown in FIG. 3 is a first joining step in which the member to be processed containing the metal oxide and the first support 10 are joined using the first adhesive layer 12.
- the bonding of the substrate 14 to the first adhesive layer 12 is specifically exemplified by attaching the substrate 14 to the first adhesive layer 12.
- the first surface 14a of the substrate 14 is processed to form a first processed surface.
- the step of forming the first processed surface by processing the first surface 14a is the first surface processing step. Examples of the first surface processing step include chemical mechanical polishing (CMP), smoothing treatment by dry etching or grinding, and pattern formation on the surface.
- CMP chemical mechanical polishing
- a conductive path 42 is configured by filling a metal as a conductor in the through path 41 of the insulating base material 40.
- part 50 with which the metal overflowed and filled with respect to the penetration path 41 may arise.
- the substrate 14 has a base portion 43 where the through passage 41 is not formed, and the base portion 43 and the first adhesive layer 12 are in contact with each other.
- the first surface 14a of the substrate 14 is preferably a surface having an arithmetic average roughness (JIS (Japanese Industrial Standards) B 0601-2001) of 1 ⁇ m or less.
- JIS Japanese Industrial Standards
- the smoothing process ends in advance when the reflectance of the first surface 14a for which the smoothing process ends is determined in advance, and the reflectance reaches a predetermined value.
- the amount of cutting may be determined in advance, and the smoothing process may be terminated when the amount of cutting reaches a predetermined value.
- the step of reducing the adhesive force of the first adhesive layer 12 described above is the first adhesive layer alteration step.
- the step of removing the first adhesive layer 12 is the first adhesive layer removing step.
- the laser light is irradiated using, for example, a YAG (Yttrium Aluminum Garnet) laser device. If the adhesive force of the first adhesive layer 12 is reduced by ultraviolet light, the adhesive force is reduced by irradiating with ultraviolet light. Note that the adhesive force of the first adhesive layer 12 may be reduced after contacting the second adhesive layer 18 described later. In the case where the first adhesive layer 12 is a self-peeling type, the timing of removing the first adhesive layer 12 is limited to after the contact and joining of the second adhesive layer 18 are finished.
- the self-peeling layer is evaporated by the laser beam, and the first support 10 is peeled off. If there is a double-sided PSA sheet, it is peeled off. Thereby, the second surface 14b of the substrate 14 is exposed.
- the first support 10 is made of a material that transmits laser light or ultraviolet light. .
- the entire first support 10 may transmit laser light or ultraviolet light.
- the transmission region preferably has a transmittance of 70% or more in the wavelength range of 200 to 500 nm.
- the transmittance is defined by JIS (Japanese Industrial Standards) R 3106-1985.
- the second support 16 is prepared, and the second adhesive layer 18 is attached to the surface 16 a of the second support 16.
- the second support 16 for example, the same one as the first support 10 is used.
- the second adhesive layer 18 has the same configuration as the first adhesive layer 12.
- the adhesive force of the first adhesive layer 12 is such that the second adhesive layer 18 does not peel from the substrate 14. It is preferable that it is always smaller than the adhesive force.
- the fact that the adhesive force of the first adhesive layer is always smaller than the adhesive force of the second adhesive layer means that the adhesive force is always small at least between the first joining step and the second joining step. To do.
- the adhesive force of the first adhesive layer 12 is greater than the adhesive force of the second adhesive layer 18. Is preferably small. Further, in the first adhesive layer removing step described later, it is preferable that the adhesive force of the second adhesive layer 18 is always greater than the adhesive force of the first adhesive layer 12.
- the adhesive force of the first adhesive layer 12 and the adhesive force of the second adhesive layer 18 can be adjusted, for example, by changing the type of adhesive.
- the second support 16 provided with the second adhesive layer 18 is disposed with the second adhesive layer 18 facing the first surface 14 a of the substrate 14.
- the second adhesive layer 18 is attached to the first surface 14a of the substrate 14 in a vacuum atmosphere so as to adhere to the first surface 14a as shown in FIG.
- the two support bodies 16 and the substrate 14 are joined.
- the step of bringing the second adhesive layer 18 into contact with the first surface 14a of the substrate 14 described above is a first surface contact step
- the step shown in FIG. 5 is a step of bonding the second support 16 and the substrate 14 together. Is the second joining step.
- the first adhesive layer 12 is removed, and the first support 10 and the substrate 14 are peeled as shown in FIG. Thereby, the 1st surface 14a is joined to the 2nd adhesion layer 18, and the 2nd surface 14b is exposed.
- the second support 16 is inverted and the second surface 14 b of the substrate 14 is subjected to a smoothing process.
- a second processed surface is formed on the back surface of the first processed surface. That is, the second processed surface is obtained by processing the second surface 14b on the back surface of the first surface 14a of the substrate 14.
- the second surface 14b of the substrate 14 is preferably a surface having an arithmetic average roughness (JIS (Japanese Industrial Standards) B 0601-2001) of 1 ⁇ m or less.
- the distance between the first processed surface and the second processed surface is 50 ⁇ m or less, that is, the distance Dt between the first surface 14a of the substrate 14 and the second surface 14b of the substrate 14 (see FIG. 46). It is preferable to apply to an embodiment in which is 50 ⁇ m or less. Thus, even if it is as thin as 50 micrometers or less, smoothing processing can be performed on both surfaces.
- the distance (not shown) between the first surface 14 a of the substrate 14 and the second surface 14 b of the substrate 14 is measured by disposing non-contact position detection sensors on both sides of the substrate 14.
- the position detection sensor for example, a laser displacement sensor manufactured by Keyence Corporation is used.
- the process of obtaining the above-mentioned 2nd processing surface is the 2nd surface processing process. Since the process of the 2nd surface 14b is the same as the process of the above-mentioned 1st surface 14a, detailed description is abbreviate
- the exposure dose of ultraviolet irradiation is not limited, but is preferably 2500 to 3500 mJ / cm 2 , more preferably 2800 to 3300 mJ / cm 2 .
- the step of reducing the adhesive force of the second adhesive layer 18 by the above exposure or heating is the second adhesive layer alteration step. When reducing the adhesive force of the second adhesive layer 18, exposure and heating may be combined.
- the step of removing the second adhesive layer 18 described above is the second adhesive layer removing step.
- the second support 16 is made of a material that transmits laser light or ultraviolet light. .
- the second support 16 may be the same as the first support 10 and may transmit laser light or ultraviolet light as a whole.
- the transmission region preferably has a transmittance of 70% or more in the wavelength range of 200 to 500 nm. The transmittance is defined by JIS (Japanese Industrial Standards) R 3106-1985, as with the first support 10.
- the 1st support body 10 and the 2nd support body 16 may be comprised with the same thing, and may be comprised with a different thing.
- both the first support 10 and the second support 16 may be a quartz glass substrate or a silicon substrate.
- the first support 10 may be a quartz glass substrate or a silicon substrate
- the second support 16 may be a silicon substrate or a quartz glass substrate.
- substrate 14 is an anisotropic conductive member
- both surfaces of the substrate 14 are processed such as smoothing.
- the substrate 14 is moved from the first support 10 by hand. Do not peel off. For this reason, deformation of the substrate 14 and destruction of the substrate 14 are suppressed.
- the production stability is increased and the yield is also improved. Productivity is improved and production costs are reduced.
- FIGS. 1 to 7 are schematic views showing a second example of the method for manufacturing a member to be processed according to the embodiment of the present invention in the order of steps.
- FIG. 10 to FIG. 18 are schematic views showing one process of the second example of the method for manufacturing a member to be processed according to the embodiment of the present invention.
- FIG. 19 is a schematic plan view showing a temporary support used in a second example of the method for manufacturing a member to be processed according to the embodiment of the present invention.
- 10 to 19 the same components as those illustrated in FIGS. 1 to 7 are denoted by the same reference numerals, and detailed description thereof is omitted.
- FIGS. 10 to 12 are the same as the steps shown in FIGS. 1 to 3 of the first example of the method for manufacturing a member to be processed.
- the detailed explanation is omitted.
- a temporary support 20 having adhesiveness (see FIGS. 13 and 19) is used.
- the temporary support 20 supports the substrate 14, and an adhesive sheet 24 is attached to a frame 22 having an opening 22 a as shown in FIGS. 13 and 19.
- the frame 22 is made of stainless steel, for example.
- the opening 22 a is a circular hole having a diameter larger than the circumscribed circle in plan view of the substrate 14.
- the shape of the opening 22a is not particularly limited. The smaller the opening 22a, the higher the rigidity of the frame 22, and the smaller the frame 22. Further, the smaller frame 22 is preferable because it is easy to carry and the size of an attaching device such as a mounter used for attaching can be reduced.
- the adhesive sheet 24 becomes the second adhesive layer 18, and is composed of, for example, a material having adhesive force on both surfaces and reducing the adhesive force on at least one of exposure and heating.
- the adhesive sheet 24 can be made of the same material as the first adhesive layer 12 and the second adhesive layer 18 described above.
- the opening 22 a of the temporary support 20 is disposed so as to face the first surface 14 a of the substrate 14 that has been smoothed on the first surface 14 a.
- the adhesive sheet 24 is attached to the first surface 14a of the substrate 14 using, for example, a mounter (not shown) (see FIG. 14). Adhesion of the adhesive sheet 24 to the first surface 14a of the substrate 14 can be performed in a normal pressure atmosphere and does not require a vacuum atmosphere. For this reason, production time can be shortened and production facilities can be simplified.
- a roller may be applied to the adhesive sheet 24 to remove bubbles on the adhesive surface.
- the first surface 14 a that is the first processed surface of the substrate 14 is supported by the adhesive sheet 24, as in the first example of the method for manufacturing the member to be processed.
- the substrate 14 and the first support 10 are peeled off by irradiating laser light or ultraviolet light from the support 10 side and removing the first adhesive layer 12.
- the substrate 14 is bonded to the adhesive sheet 24 of the temporary support 20.
- the first adhesive layer alteration step described above may be included before or after the adhesive sheet 24 contacts the first surface 14a.
- Laser light or ultraviolet light is irradiated using, for example, a YAG (Yttrium Aluminum Garnet) laser device or an as-one handy type UV irradiation device.
- the temporary support 20 is reversed.
- the second support body 16 is arranged at a position aligned with the substrate 14.
- the 2nd support body 16 is affixed on the adhesive sheet 24 of the temporary support body 20, for example using a mounter (not shown).
- An adhesive sheet 24 is provided on the first surface 14a of the substrate 14, that is, the first processed surface, and this adhesive sheet 24 becomes the second adhesive layer 18 (see FIG. 18).
- the process of sticking the second support 16 to the adhesive sheet 24 is the second joining process. Also in this case, it can be performed in a normal pressure atmosphere, and it is not necessary to use a vacuum atmosphere. Thus, since it is not necessary to make a vacuum atmosphere when the substrate 14 is transferred, production time can be shortened and production equipment can be simplified.
- the adhesive sheet 24 is cut along the periphery of the substrate 14 using, for example, a cutter 25.
- the second support 16 and the substrate 14 are bonded via the second adhesive layer 18 with the second surface 14 b of the substrate 14 exposed.
- the second surface 14b of the substrate 14 is processed.
- the first surface 14a and the second surface 14b of the substrate 14 can be processed.
- the adhesive force of the second adhesive layer 18 is reduced, and the second adhesion is performed.
- the layer 18 is removed, and the substrate 14 is peeled from the second support 16. Thereby, the board
- the same effect as in the first example of the method for manufacturing a member to be processed can be obtained. Further, in the second example of the method for manufacturing the member to be processed, it is not necessary to use a vacuum atmosphere when transferring the substrate 14 using the adhesive sheet 24, the production time can be shortened, and the production equipment can be simplified. Therefore, the production cost can be further reduced.
- the cutting of the adhesive sheet 24 is not limited to the cutter 25.
- 20 to 28 are schematic views showing a third example of the method for manufacturing a member to be processed according to the embodiment of the present invention in the order of steps.
- 20 to 28 are schematic views showing one process of the third example of the method for manufacturing a member to be processed according to the embodiment of the present invention.
- 20 to 28 the same components as those shown in FIGS. 10 to 19 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the steps shown in FIGS. 20 to 22 are the steps shown in FIGS. 1 to 3 of the first example of the method for manufacturing the member to be processed, and the manufacturing of the member to be processed. Since this is the same as the steps shown in FIGS. 10 to 12 of the second example of the method, detailed description thereof is omitted.
- the steps shown in FIGS. 23 and 24 are the same as the steps shown in FIGS. 13 and 14 of the second example of the method for manufacturing a member to be processed. Detailed description will be omitted.
- the adhesive sheet 24 of the temporary support 20 is attached to the frame 22 so as to cover the opening 22a.
- the adhesive sheet 26 is attached to the second surface 14 b of the substrate 14.
- the process of attaching the first surface 14a of the substrate 14 to the adhesive sheet 24 of the temporary support 21 described above is the first transfer process.
- the adhesive sheet 26 for example, a sheet whose adhesive force is reduced by ultraviolet light is used.
- the adhesive sheet 26 has a larger adhesive force than the adhesive sheet 24.
- the adhesive sheet 26 includes a UV (ultraviolet) release sheet that is peeled off by ultraviolet light (Selfa MP (trade name) manufactured by Sekisui Chemical Co., Ltd.). ) Is used. Since the adhesive sheet 26 has a larger adhesive force than the adhesive sheet 24, the substrate 14 is peeled from the adhesive sheet 24 using the difference in adhesive force, and the second surface 14b of the substrate 14 and the adhesive sheet 26 are removed as shown in FIG. And just paste. A process of attaching the second surface 14b of the substrate 14 and the adhesive sheet 26 is a second transfer process.
- the 2nd support body 16 with which the 2nd contact bonding layer 18 was provided in the surface 16a is prepared.
- the above-described second support 16 is disposed on the first surface 14 a of the substrate 14 attached to the adhesive sheet 26 so as to face the second adhesive layer 18.
- the first surface 14a of the substrate 14 and the second adhesive layer 18 are brought into contact with each other and are attached using a mounter (not shown) as described above.
- substrate 14 is affixed on the 2nd contact bonding layer 18 provided on the 2nd support body 16 toward the 1st surface 14a.
- the step of attaching the substrate 14 to the second adhesive layer 18 provided on the second support 16 is the second bonding step.
- the adhesive sheet 26 is removed by reducing the adhesive force of the adhesive sheet 26.
- the second support 16 and the substrate 14 are bonded via the second adhesive layer 18 with the second surface 14 b of the substrate 14 exposed.
- the second surface 14b of the substrate 14 is processed.
- the first surface 14a and the second surface 14b of the substrate 14 can be processed.
- the adhesive force of the second adhesive layer 18 is reduced by heating or exposure, for example, and the second adhesive layer 18 is removed. Peel off. Thereby, the board
- the same effect as in the first example of the method for manufacturing a member to be processed can be obtained.
- the vacuum atmosphere is used when the substrate 14 is transferred using the adhesive sheet 24 and the adhesive sheet 26 as in the second example of the method for manufacturing the member to be processed.
- the production cost can be further reduced because the production time can be shortened and the production equipment can be simplified.
- 29 to 39 are schematic views showing a fourth example of the method of manufacturing a member to be processed according to the embodiment of the present invention in the order of steps.
- 29 to 39 are each a schematic diagram showing one process of the fourth example of the method for manufacturing a member to be processed according to the embodiment of the present invention.
- 29 to 39 the same components as those illustrated in FIGS. 10 to 19 are denoted by the same reference numerals, and detailed description thereof is omitted.
- the steps shown in FIGS. 29 to 31 are the same as the steps shown in FIGS. 1 to 3 of the first example of the method for manufacturing a member to be processed. The detailed explanation is omitted.
- a first transfer support 30 and a second transfer support 32 described later are used for transferring the substrate 14.
- the first transfer support 30 is brought into contact with the first surface 14a of the processed substrate 14.
- This step is a first transfer step in which the substrate 14 is transferred to the first transfer support 30.
- the first transfer support 30 is an adsorption support that adsorbs the substrate 14 and supports a contact state with the substrate 14.
- the first transfer support 30 is made of, for example, a porous plate and connected to a decompression device. The contact state between the substrate 14 and the first transfer support 30 is supported by suction through the first transfer support 30 by the decompression device.
- the substrate 14 is irradiated with laser light or ultraviolet light from the first support 10 side while being adsorbed and supported by the first transfer support 30, and as shown in FIG. 33, the first adhesive layer 12 is irradiated. Is removed from the substrate 14 and the first support 10 is removed from the substrate 14. Note that a first adhesive layer alteration step may be included before or after the transfer support 30 contacts the first surface 14a. Thereby, the substrate 14 is attracted to the first transfer support 30.
- the second transfer support 32 is disposed so as to face the second surface 14 b of the substrate 14. Since it is an adsorption support that adsorbs the substrate 14 and has the same configuration as the first transfer support 30 described above, detailed description thereof is omitted.
- the second transfer support 32 is brought into contact with the second surface 14b which is a surface other than the first processed surface of the substrate 14, the substrate 14 is adsorbed by the second transfer support 32, and the substrate 14 is moved to the first transfer.
- the support 30 and the second transfer support 32 are in the adsorbed state.
- the adsorption of the substrate 14 by the second transfer support 32 is maintained, and the adsorption of the substrate 14 by the first transfer support 30 is stopped.
- This step is a second transfer step in which the substrate 14 is transferred to the second transfer support 32.
- the second support 16 having the second adhesive layer 18 provided on the surface 16a is prepared.
- the second support 16 is arranged with the second adhesive layer 18 facing the first surface 14a of the substrate 14 adsorbed to the second transfer support 32.
- the first surface 14a of the substrate 14 and the second adhesive layer 18 are brought into contact with each other and attached using a mounter (not shown) as described above. Thereby, the board
- substrate 14 is affixed on the 2nd contact bonding layer 18 provided on the 2nd support body 16 toward the 1st surface 14a.
- the adsorption of the substrate 14 by the second transfer support 32 is stopped.
- the second support 16 and the substrate 14 are bonded via the second adhesive layer 18 with the second surface 14 b of the substrate 14 exposed.
- a process in which the second support 16 and the substrate 14 are bonded via the second adhesive layer 18 is a second bonding process.
- the bonding is performed in a vacuum atmosphere in order to prevent air bubbles from entering the bonding interface between the first surface 14a and the second adhesive layer 18. It is preferable to do.
- the second surface 14b of the substrate 14 is processed.
- the first surface 14a and the second surface 14b of the substrate 14 can be processed.
- the adhesive force of the second adhesive layer 18 is reduced, and the second adhesion is performed.
- the layer 18 is removed, and the substrate 14 is peeled from the second support 16. Thereby, the board
- the same effect as in the first example of the method for manufacturing a member to be processed can be obtained.
- the first transfer support 30 and the second transfer support 32 using suction are used to suck the substrate 14 and the substrate 14. Since the holding state of the substrate 14 can be controlled by stopping the adsorption, it is simpler and can transfer the substrate 14 faster than an adhesive layer using laser light, ultraviolet light, or heating. For this reason, production time can be shortened and production cost can be further reduced.
- the third example of the method for manufacturing the member to be processed may be combined with the fourth example of the method for manufacturing the member to be processed.
- the temporary support 20 in which the substrate 14 is bonded to the adhesive sheet 24 as shown in FIG.
- the second transfer support 32 is disposed opposite to the second surface 14 b of 14.
- the substrate 14 is adsorbed by the second transfer support 32.
- the adhesive sheet 24 is heated, the adhesive force of the adhesive sheet 24 is reduced and peeled, and the adhesive sheet 24 is removed.
- the second surface 14b of the substrate 14 is attracted to the second transfer support 32, and the first surface 14a of the substrate 14 is exposed.
- the 2nd support body 16 with which the 2nd contact bonding layer 18 was provided in the surface 16a as shown in the above-mentioned FIG. 36 is prepared.
- the subsequent steps are as described in the fourth example of the method for manufacturing the member to be processed.
- the second transfer support 32 is arranged, but instead of the second transfer support 32, as shown in FIG.
- the temporary support 21 may be disposed on the surface. Since the temporary support 21 has the same configuration as the temporary support 20 described above, a detailed description thereof will be omitted.
- the adhesive sheet 24 of the temporary support 21 is brought into contact with the second surface 14b of the substrate 14 and bonded using, for example, a mounter (not shown). Next, the adsorption of the first transfer support 30 is stopped, and the first transfer support 30 is separated from the substrate 14.
- FIG. 2 Two support bodies 16 are arranged.
- the first surface 14a of the substrate 14 and the second adhesive layer 18 are brought into contact with each other and are attached using a mounter (not shown) as described above.
- the adhesive force is reduced and the adhesive sheet 24 is removed.
- the second support 16 and the substrate 14 are bonded via the second adhesive layer 18 with the second surface 14 b of the substrate 14 exposed.
- the second surface 14b of the substrate 14 is processed. As described above, the first surface 14a and the second surface 14b of the substrate 14 can be processed.
- FIG. 45 is a plan view showing an example of the configuration of the anisotropic conductive member used for the member to be processed
- FIG. 46 is a schematic cross-sectional view showing an example of the configuration of the anisotropic conductive member used for the member to be processed
- FIG. 47 is a schematic cross-sectional view showing an example of the configuration of an anisotropic conductive material having an anisotropic conductive member used for a member to be processed.
- the anisotropic conductive member 15 shown in FIGS. 45 and 46 penetrates the insulating base 40 made of an inorganic material in the thickness direction Z (see FIG. 46) of the insulating base 40 and is electrically insulated from each other. It is a member provided with the some conduction
- the insulating substrate 40 is made of, for example, aluminum anodic oxide.
- the conduction path 42 is obtained by filling the inside of the through path 41 penetrating in the thickness direction of the insulating base material 40 with metal.
- the inside of the micropore formed in the aluminum anodic oxide film is filled with metal to form the conduction path 42.
- the state of being electrically insulated from each other means that each conduction path existing inside the insulating base material has a sufficiently low conductivity between each conduction path inside the insulating base material. It means a state.
- the anisotropic conductive member 15 has electrically conductive paths 42 that are electrically insulated from each other, and has a sufficiently low conductivity in a direction x orthogonal to the thickness direction Z (see FIG. 46) of the insulating base material 40. Conductivity in direction Z. As described above, the anisotropic conductive member 15 is a member exhibiting anisotropic conductivity.
- the conduction path 42 is provided through the insulating base material 40 in the thickness direction Z while being electrically insulated from each other. Further, the conduction path 42 may have a protruding portion 42a and a protruding portion 42b protruding from the surfaces 40a and 40b of the insulating base material 40 as shown in FIG. 46 by the above trimming process.
- the anisotropic conductive member 15 may further include a resin layer 44 provided on the front surface 40 a and the back surface 40 b of the insulating base material 40.
- the resin layer 44 has adhesiveness and imparts bondability.
- the length of the protruding portion 42a and the protruding portion 42b is preferably 6 nm or more, and more preferably 30 nm to 500 nm.
- the present invention is not limited to this. At least one surface of the insulating base 40 is not limited thereto.
- the resin layer 44 may be used.
- the conduction path 42 has a protruding portion 42a and a protruding portion 42b at both ends.
- the present invention is not limited to this, and the surface on the side having at least the resin layer 44 of the insulating substrate 40 is not limited thereto.
- the structure which has a protrusion part in may be sufficient.
- the thickness h of the anisotropic conductive member 15 shown in FIG. 46 is, for example, 50 ⁇ m or less.
- the anisotropic conductive member 15 preferably has a total thickness variation (TTV) of 10 ⁇ m or less.
- TTV total thickness variation
- the thickness h of the anisotropic conductive member 15 is determined by observing the anisotropic conductive member 15 with a field emission scanning electron microscope at a magnification of 200,000 times to obtain the contour shape of the anisotropic conductive member 15. And it is the average value which measured 10 points
- the TTV (Total Thickness Variation) of the anisotropic conductive member 15 is a value obtained by cutting the anisotropic conductive member 15 together with the support base 46 by dicing and observing the cross-sectional shape of the anisotropic conductive member 15. is there.
- the anisotropic conductive member 15 is provided on the support base 46 as shown in FIG. 47 for transfer, conveyance and transportation, storage, and the like.
- a release layer 47 is provided between the support base 46 and the anisotropic conductive member 15.
- the support base 46 and the anisotropic conductive member 15 are detachably bonded by a release layer 47.
- the anisotropic conductive member 15 provided on the support base 46 via the release layer 47 is referred to as an anisotropic conductive material 28.
- the support base 46 supports the anisotropic conductive member 15 and is made of, for example, a silicon substrate.
- a ceramic substrate such as SiC, SiN, GaN, and alumina (Al 2 O 3 ), a glass substrate, a fiber reinforced plastic substrate, and a metal substrate can be used as the support base 46.
- the fiber reinforced plastic substrate includes an FR-4 (Flame Retardant Type 4) substrate which is a printed circuit board.
- a flexible and transparent substrate can be used as the support base 46.
- the flexible and transparent support base 46 include PET (polyethylene terephthalate), polycycloolefin, polycarbonate, acrylic resin, PEN (polyethylene naphthalate), PE (polyethylene), PP (polypropylene), Examples thereof include plastic films such as polystyrene, polyvinyl chloride, polyvinylidene chloride, and TAC (triacetyl cellulose).
- transparent means that the transmittance is 80% or more with light having a wavelength used for alignment.
- the transmittance may be low over the entire visible light with a wavelength of 400 to 800 nm, but the transmittance is preferably 80% or more over the entire visible light with a wavelength of 400 to 800 nm.
- the transmittance is measured with a spectrophotometer.
- the release layer 47 is preferably a laminate of a support layer 48 and a release agent 49.
- the release agent 49 is in contact with the anisotropic conductive member 15, and the support base 46 and the anisotropic conductive member 15 are separated from each other with the release layer 47 as a starting point.
- the anisotropic conductive material 28 for example, by heating to a predetermined temperature, the adhesive force of the release agent 49 is weakened, and the support base 46 is removed from the anisotropic conductive member 15.
- Riva Alpha registered trademark
- Somatack registered trademark
- the insulating base material is made of an inorganic material and is particularly limited as long as it has an electrical resistivity (about 10 14 ⁇ ⁇ cm) comparable to that of an insulating base material that constitutes a conventionally known anisotropic conductive film or the like.
- electrical resistivity about 10 14 ⁇ ⁇ cm
- “consisting of an inorganic material” is a rule for distinguishing from a polymer material constituting a resin layer described later, and is not a rule limited to an insulating base material composed only of an inorganic material, but an inorganic material. Is the main component (50% by mass or more).
- the insulating substrate examples include metal oxide substrates, metal nitride substrates, glass substrates, ceramic substrates such as silicon carbide, silicon nitride, carbon substrates such as diamond-like carbon, polyimide substrates, These composite materials are exemplified.
- the insulating base material may be a film formed of an inorganic material containing 50% by mass or more of a ceramic material or a carbon material on an organic material having a through path.
- the insulating base material is preferably a metal oxide base material because a micropore having a desired average opening diameter is formed as a through path and a conductive path described later is easily formed.
- An oxide film is more preferable.
- Specific examples of the valve metal include aluminum, tantalum, niobium, titanium, hafnium, zirconium, zinc, tungsten, bismuth, and antimony. Of these, an anodic oxide film (base material) of aluminum is preferable because it has good dimensional stability and is relatively inexpensive.
- the interval between the conductive paths in the insulating substrate is preferably 5 nm to 800 nm, more preferably 10 nm to 200 nm, and even more preferably 50 nm to 140 nm.
- the insulating base functions sufficiently as an insulating partition.
- the interval between the conductive paths means the width w between adjacent conductive paths (see FIG. 46), and the cross section of the anisotropic conductive member is observed at a magnification of 200,000 times with a field emission scanning electron microscope. And the average value which measured the width
- the plurality of conduction paths are made of a conductive material that penetrates in the thickness direction of the insulating base material and is electrically insulated from each other.
- the conduction path is a conductor.
- the conduction path has a protruding portion protruding from the surface of the insulating base material, and the end of the protruding portion of each conduction path may be embedded in a resin layer described later.
- the conductive material constituting the conduction path is not particularly limited as long as the electrical resistivity is 10 3 ⁇ ⁇ cm or less, and specific examples thereof include gold (Au), silver (Ag), copper (Cu), Preferred examples include aluminum (Al), magnesium (Mg), nickel (Ni), tin oxide doped with indium (ITO), and the like. Among these, from the viewpoint of electrical conductivity, copper, gold, aluminum, and nickel are preferable, and copper and gold are more preferable.
- the above-described conduction path, that is, the conductor is preferably made of an unoxidized metal.
- the unoxidized metal is, for example, a transition metal, and the transition metal is, for example, the above-described copper.
- the protruding portion of the conductive path is a portion where the conductive path protrudes from the surface of the insulating base material, and the end of the protruding portion is embedded in the resin layer.
- the aspect ratio of the protruding portion is preferably 0.5 or more and less than 50, more preferably 0.8 to 20, and further preferably 1 to 10. preferable.
- the height of the protruding portion of the conduction path is preferably 20 nm or more as described above, and more preferably. 100 nm to 500 nm.
- the height of the protruding portion of the conduction path is an average obtained by observing the cross section of the anisotropic conductive member at a magnification of 20,000 times with a field emission scanning electron microscope and measuring the height of the protruding portion of the conduction path at 10 points. Value.
- the diameter of the protruding portion of the conduction path is an average value obtained by observing the cross section of the anisotropic conductive member with a field emission scanning electron microscope and measuring the diameter of the protruding portion of the conduction path at 10 points.
- the conduction path is columnar, and the diameter d (see FIG. 46) of the conduction path is preferably more than 5 nm and not more than 10 ⁇ m, more preferably 20 nm to 1000 nm, and more preferably 100 nm or less, like the diameter of the protruding portion. More preferably.
- a density of 20,000 pieces / mm is preferably 2 or more, 2 million / mm 2 or more Is more preferably 10 million pieces / mm 2 or more, particularly preferably 50 million pieces / mm 2 or more, and most preferably 100 million pieces / mm 2 or more.
- the center-to-center distance p (see FIG. 45) of adjacent conductive paths is preferably 20 nm to 500 nm, more preferably 40 nm to 200 nm, and even more preferably 50 nm to 140 nm.
- the resin layer is provided on the surface of the insulating base material and embeds the above-described conduction path. That is, the resin layer covers the surface of the insulating base and the end of the conductive path protruding from the insulating base.
- the resin layer imparts bondability to the connection target.
- the resin layer preferably exhibits fluidity in a temperature range of 50 ° C. to 200 ° C. and is cured at 200 ° C. or higher.
- the composition of the resin layer will be described.
- the resin layer contains a polymer material.
- the resin layer may contain an antioxidant material.
- thermosetting resin examples include epoxy resins, phenol resins, polyimide resins, polyester resins, polyurethane resins, bismaleimide resins, melamine resins, and isocyanate resins. Among these, it is preferable to use a polyimide resin and / or an epoxy resin because the insulation reliability is further improved and the chemical resistance is excellent.
- antioxidant material contained in the resin layer include 1,2,3,4-tetrazole, 5-amino-1,2,3,4-tetrazole, 5-methyl-1,2, 3,4-tetrazole, 1H-tetrazole-5-acetic acid, 1H-tetrazole-5-succinic acid, 1,2,3-triazole, 4-amino-1,2,3-triazole, 4,5-diamino-1 , 2,3-triazole, 4-carboxy-1H-1,2,3-triazole, 4,5-dicarboxy-1H-1,2,3-triazole, 1H-1,2,3-triazole-4- Acetic acid, 4-carboxy-5-carboxymethyl-1H-1,2,3-triazole, 1,2,4-triazole, 3-amino-1,2,4-triazole, 3,5-diamino-1,2 , 4-triazole, -Carboxy-1,2,4-triazole, 3,5-dicar
- benzotriazole and its derivatives are preferred.
- benzotriazole derivatives include a hydroxyl group, an alkoxy group (eg, methoxy group, ethoxy group, etc.), an amino group, a nitro group, an alkyl group (eg, methyl group, ethyl group, butyl group, etc.) on the benzene ring of benzotriazole.
- substituted benzotriazole having a halogen atom for example, fluorine, chlorine, bromine, iodine and the like.
- substituted naphthalenetriazole, substituted naphthalenebistriazole and the like substituted in the same manner as naphthalenetriazole and naphthalenebistriazole can also be mentioned.
- antioxidant material contained in the resin layer include general antioxidants, higher fatty acids, higher fatty acid copper, phenolic compounds, alkanolamines, hydroquinones, copper chelating agents, organic amines, organic An ammonium salt etc. are mentioned.
- the content of the antioxidant material contained in the resin layer is not particularly limited, but is preferably 0.0001% by mass or more and more preferably 0.001% by mass or more with respect to the total mass of the resin layer from the viewpoint of the anticorrosive effect. Moreover, from the reason for obtaining an appropriate electrical resistance in this joining process, 5.0 mass% or less is preferable and 2.5 mass% or less is more preferable.
- the resin layer contains a migration prevention material because the insulation reliability is further improved by trapping metal ions, halogen ions, and metal ions derived from the semiconductor chip and the semiconductor wafer that can be contained in the resin layer. Is preferred.
- an ion exchanger for example, an ion exchanger, specifically, a mixture of a cation exchanger and an anion exchanger, or only a cation exchanger can be used.
- the cation exchanger and the anion exchanger can be appropriately selected from, for example, an inorganic ion exchanger and an organic ion exchanger described later.
- inorganic ion exchanger examples include metal hydrated oxides typified by hydrous zirconium oxide.
- metals for example, in addition to zirconium, iron, aluminum, tin, titanium, antimony, magnesium, beryllium, indium, chromium, bismuth, and the like are known.
- zirconium-based ones have exchangeability for the cationic Cu 2+ and Al 3+ .
- iron-based ones have exchange ability for Ag + and Cu 2+ .
- those based on tin, titanium and antimony are cation exchangers.
- those of bismuth-based, anion Cl - has exchange capacity for.
- Zirconium-based ones exhibit anion exchange capacity depending on the production conditions. The same applies to aluminum-based and tin-based ones.
- inorganic ion exchangers other than these synthetic compounds such as acid salts of polyvalent metals typified by zirconium phosphate, heteropolyacid salts typified by ammonium molybdophosphate, insoluble ferrocyanides, and the like are known. Some of these inorganic ion exchangers are already on the market, and for example, various grades under the trade name IXE “IXE” of Toa Gosei Co., Ltd. are known.
- natural product zeolite or inorganic ion exchanger powder such as montmorillonite can also be used.
- organic ion exchanger examples include crosslinked polystyrene having a sulfonic acid group as a cation exchanger, and those having a carboxylic acid group, a phosphonic acid group, or a phosphinic acid group. Moreover, the crosslinked polystyrene which has a quaternary ammonium group, a quaternary phosphonium group, or a tertiary sulfonium group as an anion exchanger is mentioned.
- inorganic ion exchangers and organic ion exchangers may be appropriately selected in consideration of the type of cation to be captured, the type of anion, and the exchange capacity for the ion. Of course, it goes without saying that an inorganic ion exchanger and an organic ion exchanger may be mixed and used. Since the manufacturing process of an electronic device includes a heating process, an inorganic ion exchanger is preferable.
- the mixing ratio of the migration preventing material and the above-described polymer material is preferably, for example, 10% by mass or less for the migration preventing material and 5% by mass or less for the migration preventing material from the viewpoint of mechanical strength. More preferably, the migration prevention material is further preferably 2.5% by mass or less. Moreover, it is preferable that a migration prevention material shall be 0.01 mass% or more from a viewpoint of suppressing the migration at the time of joining a semiconductor chip or a semiconductor wafer, and an anisotropic conductive member.
- the resin layer preferably contains an inorganic filler.
- the inorganic filler is not particularly limited and can be appropriately selected from known ones. For example, kaolin, barium sulfate, barium titanate, silicon oxide powder, finely divided silicon oxide, gas phase method silica, and amorphous silica , Crystalline silica, fused silica, spherical silica, talc, clay, magnesium carbonate, calcium carbonate, aluminum oxide, aluminum hydroxide, mica, aluminum nitride, zirconium oxide, yttrium oxide, silicon carbide, silicon nitride and the like.
- the average particle diameter of the inorganic filler is larger than the interval between the conduction paths.
- the average particle size of the inorganic filler is preferably 30 nm to 10 ⁇ m, and more preferably 80 nm to 1 ⁇ m.
- the average particle size is defined as a primary particle size measured by a laser diffraction / scattering particle size measuring device (Microtrack MT3300 manufactured by Nikkiso Co., Ltd.).
- the resin layer may contain a curing agent.
- a curing agent it does not use a solid curing agent at room temperature, but contains a liquid curing agent at room temperature, from the viewpoint of suppressing poor bonding with the surface shape of the semiconductor chip or semiconductor wafer to be connected. Is more preferable.
- solid at normal temperature means a solid at 25 ° C., for example, a substance having a melting point higher than 25 ° C.
- the curing agent examples include aromatic amines such as diaminodiphenylmethane and diaminodiphenylsulfone, aliphatic amines, imidazole derivatives such as 4-methylimidazole, dicyandiamide, tetramethylguanidine, thiourea-added amine, methyl
- aromatic amines such as diaminodiphenylmethane and diaminodiphenylsulfone
- aliphatic amines examples include imidazole derivatives such as 4-methylimidazole, dicyandiamide, tetramethylguanidine, thiourea-added amine, methyl
- carboxylic acid anhydrides such as hexahydrophthalic anhydride, carboxylic acid hydrazides, carboxylic acid amides, polyphenol compounds, novolak resins, polymercaptans, and the like.
- curing agent may be used individually by 1
- the resin layer may contain various additives such as a dispersant, a buffering agent, and a viscosity modifier that are generally added to a resin insulating film of a semiconductor package as long as the characteristics are not impaired.
- additives such as a dispersant, a buffering agent, and a viscosity modifier that are generally added to a resin insulating film of a semiconductor package as long as the characteristics are not impaired.
- the thickness of the resin layer is preferably larger than the height of the protruding portion of the conduction path and is 1 ⁇ m to 5 ⁇ m.
- ⁇ Transparent insulator> A transparent insulator is comprised by what is visible light transmittance
- the transparent insulator when the main component (polymer material) is the same as the above [resin layer], the adhesion between the transparent insulator and the resin layer is preferable. Since the transparent insulator is formed in a portion where there is no electrode or the like, it is preferable not to include the ⁇ antioxidation material> of the above [resin layer] and the ⁇ migration prevention material> of the above [resin layer].
- the transparent insulator preferably contains ⁇ inorganic filler> of the above [resin layer] because the warpage of the anisotropic conductive material is reduced when the CTE (linear expansion coefficient) is closer to the support such as silicon.
- the polymer material and the curing agent are the same as those in the above [resin layer] because curing conditions such as temperature and time are the same.
- the visible light transmittance of 80% or more means that the light transmittance is 80% or more in the visible light wavelength region having a wavelength of 400 to 800 nm.
- the light transmittance is measured using “Plastic—How to obtain total light transmittance and total light reflectance” defined in JIS (Japanese Industrial Standard) K 7375: 2008.
- the manufacturing method of the anisotropically conductive member 15 shown in FIGS. 45 and 46 is not particularly limited, for example, a conduction path forming step of forming a conduction path by causing a conductive material to exist in a through path provided in an insulating base And a step of performing the method for manufacturing a member to be processed according to the present invention. Furthermore, it has the trimming process which makes a conduction path protrude, and the resin layer formation process which forms a resin layer on the surface of an insulating base material and the protrusion part of a conduction path after a trimming process.
- the insulating base material preferably has a metal oxide.
- the insulating base material is preferably a substrate formed by subjecting the valve metal to an anodic oxidation treatment from the viewpoint of setting the opening diameter of the conduction path and the aspect ratio of the protruding portion within the above-mentioned ranges.
- the anodizing treatment for example, when the insulating base material is made of aluminum anodic oxide, the anodizing treatment for anodizing the aluminum substrate, and the micropores formed by anodizing after the anodizing treatment It can produce by performing the penetration process which penetrates through in this order.
- the aluminum substrate is not particularly limited, and specific examples thereof include a pure aluminum plate; an alloy plate containing aluminum as a main component and containing a trace amount of foreign elements; and depositing high-purity aluminum on low-purity aluminum (for example, recycled material).
- the substrate include: a substrate in which a surface of silicon wafer, quartz, glass or the like is coated with high-purity aluminum by a method such as vapor deposition or sputtering; a resin substrate in which aluminum is laminated;
- the surface on which the anodic oxide film is provided by an anodic oxidation treatment step described later preferably has an aluminum purity of 99.9% by mass or more, more preferably 99.99% by mass or more.
- the surface which performs the anodizing process mentioned later among aluminum substrates is heat-processed, a degreasing process, and a mirror surface finishing process previously.
- the aluminum substrate used for the production of the insulating base material and each processing step applied to the aluminum substrate those similar to those described in paragraphs ⁇ 0041> to ⁇ 0121> of JP 2008-270158 A should be adopted.
- the metal oxide preferably contains a metal element other than unoxidized metal.
- the metal oxide is, for example, a base metal oxide, and the base metal oxide is, for example, an aluminum oxide.
- the unoxidized metal is, for example, copper as described above.
- the conduction path forming process is a process in which a conductive material is present in the through path provided in the insulating base material.
- a method of making the metal exist in the through passage, for example, each method described in paragraphs ⁇ 0123> to ⁇ 0126> of JP 2008-270158 A and [FIG. 4] (electrolytic plating method or electroless method) The same method as the plating method) may be mentioned.
- electrolytic plating method or the electroless plating method it is preferable to provide an electrode layer of gold, nickel, copper or the like in advance.
- Examples of the method for forming the electrode layer include vapor phase treatment such as sputtering, liquid layer treatment such as electroless plating, and a combination thereof.
- vapor phase treatment such as sputtering
- liquid layer treatment such as electroless plating
- a combination thereof By the metal filling step, an anisotropic conductive member before the protruding portion of the conduction path is formed is obtained.
- the surface on one side of the aluminum substrate (hereinafter also referred to as “single side”) is subjected to anodization treatment, and aluminum
- An anodizing treatment step for forming an anodized film having micropores in the thickness direction and a barrier layer at the bottom of the micropores on one side of the substrate, and an anodizing barrier layer after the anodizing step A barrier layer removing step to be removed, a metal filling step of performing electrolytic plating after the barrier layer removing step to fill the inside of the micropore with a metal, an aluminum substrate being removed after the metal filling step, and a metal-filled microstructure And a substrate removing step for obtaining the method.
- anodizing process In the anodizing process, anodizing is performed on one surface of the aluminum substrate, thereby forming an anodized film having micropores in the thickness direction and a barrier layer present at the bottom of the micropores on one surface of the aluminum substrate. It is a process to do.
- a conventionally known method can be used for the anodizing treatment, but it is preferable to use a self-regulating method or a constant voltage treatment from the viewpoint of increasing the regularity of the micropore array and ensuring anisotropic conductivity.
- the self-ordering method or the constant voltage process of the anodizing process is the same as the processes described in paragraphs ⁇ 0056> to ⁇ 0108> and [FIG. 3] of Japanese Patent Application Laid-Open No. 2008-270158. Can be applied.
- the barrier layer removing step is a step of removing the barrier layer of the anodized film after the anodizing treatment step. By removing the barrier layer, a part of the aluminum substrate is exposed through the micropore.
- the method for removing the barrier layer is not particularly limited.
- the barrier layer is electrochemically dissolved at a potential lower than the potential in the anodizing treatment in the anodizing treatment step (hereinafter also referred to as “electrolytic removal treatment”). ); Method of removing the barrier layer by etching (hereinafter, also referred to as “etching removal treatment”); a combination of these (especially, after the electrolytic removal treatment is performed, the remaining barrier layer is removed by the etching removal treatment) Method);
- the electrolytic removal treatment is not particularly limited as long as it is an electrolytic treatment performed at a potential lower than the potential (electrolytic potential) in the anodizing treatment in the anodizing treatment step.
- the electrolytic dissolution treatment can be performed continuously with the anodizing treatment, for example, by lowering the electrolytic potential at the end of the anodizing treatment step.
- the electrolytic removal treatment can employ the same electrolytic solution and treatment conditions as those of the above-described conventionally known anodizing treatment except for the electrolytic potential.
- the electrolytic removal treatment and the anodic oxidation treatment are successively performed as described above, it is preferable to perform treatment using the same electrolytic solution.
- the electrolytic potential in the electrolytic removal treatment is preferably lowered continuously or stepwise (stepwise) to a potential lower than the electrolytic potential in the anodic oxidation treatment.
- the reduction width (step width) when the electrolytic potential is lowered stepwise is preferably 10 V or less, more preferably 5 V or less, and more preferably 2 V or less from the viewpoint of the withstand voltage of the barrier layer. More preferably it is.
- the voltage drop rate when dropping the electrolytic potential continuously or stepwise is preferably 1 V / second or less, more preferably 0.5 V / second or less, and 0.2 V / second from the viewpoint of productivity. More preferred is less than a second.
- the etching removal process is not particularly limited, but may be a chemical etching process using an acid aqueous solution or an alkali aqueous solution, or may be a dry etching process.
- the removal of the barrier layer by the chemical etching treatment is performed, for example, by immersing the structure after the anodizing treatment step in an acid aqueous solution or an alkali aqueous solution, filling the inside of the micropore with an acid aqueous solution or an alkali aqueous solution, and then removing the anodized film.
- the surface of the micropore opening side is brought into contact with a pH (hydrogen ion index) buffer solution, and only the barrier layer can be selectively dissolved.
- an acid aqueous solution when used, it is preferable to use an aqueous solution of an inorganic acid such as sulfuric acid, phosphoric acid, nitric acid, hydrochloric acid, or a mixture thereof.
- concentration of the aqueous acid solution is preferably 1% by mass to 10% by mass.
- the temperature of the aqueous acid solution is preferably 15 to 80 ° C, more preferably 20 to 60 ° C, and further preferably 30 to 50 ° C.
- an alkaline aqueous solution it is preferable to use an aqueous solution of at least one alkali selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide.
- the concentration of the alkaline aqueous solution is preferably 0.1% by mass to 5% by mass.
- the temperature of the alkaline aqueous solution is preferably 10 ° C. to 60 ° C., more preferably 15 ° C. to 45 ° C., and further preferably 20 ° C. to 35 ° C.
- the alkaline aqueous solution may contain zinc and other metals. Specifically, for example, 50 g / L, 40 ° C. phosphoric acid aqueous solution, 0.5 g / L, 30 ° C. sodium hydroxide aqueous solution, 0.5 g / L, 30 ° C. potassium hydroxide aqueous solution, etc. are preferably used. It is done.
- the buffer solution corresponding to the acid aqueous solution or alkali aqueous solution mentioned above can be used suitably.
- the immersion time in the acid aqueous solution or alkaline aqueous solution is preferably 8 minutes to 120 minutes, more preferably 10 minutes to 90 minutes, and further preferably 15 minutes to 60 minutes.
- a gas species such as a Cl 2 / Ar mixed gas is preferably used.
- the metal filling step is a step of performing electrolytic plating treatment after the barrier layer removing step to fill the inside of the micropores in the anodic oxide film with, for example, ⁇ 0123> to ⁇ [0126]
- electrolytic plating method or electroless plating method an aluminum substrate exposed through a micropore after the barrier layer removing step described above can be used as an electrode.
- the substrate removal step is a step of removing the aluminum substrate after the metal filling step to obtain a metal-filled microstructure.
- the treatment solution is used to dissolve only the aluminum substrate without dissolving the metal filled in the micropores and the anodic oxide film as the insulating base material in the metal filling step. And the like.
- the treatment liquid examples include aqueous solutions of mercury chloride, bromine / methanol mixture, bromine / ethanol mixture, aqua regia, hydrochloric acid / copper chloride mixture, etc. Among them, a hydrochloric acid / copper chloride mixture is preferable.
- the concentration of the treatment liquid is preferably 0.01 mol / L to 10 mol / L, more preferably 0.05 mol / L to 5 mol / L.
- the treatment temperature is preferably ⁇ 10 ° C. to 80 ° C., and preferably 0 ° C. to 60 ° C.
- the trimming process is a process of removing only a part of the insulating base material on the surface of the anisotropic conductive member after the conductive path forming process and projecting the conductive path.
- the trimming treatment is not particularly limited as long as it does not dissolve the metal constituting the conduction path.
- an inorganic acid such as sulfuric acid, phosphoric acid, nitric acid, hydrochloric acid, or a mixture thereof It is preferable to use an aqueous solution of Especially, the aqueous solution which does not contain chromic acid is preferable at the point which is excellent in safety
- the concentration of the acid aqueous solution is preferably 1% by mass to 10% by mass.
- the temperature of the acid aqueous solution is preferably 25 ° C. to 60 ° C.
- an alkaline aqueous solution of at least one alkali selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide.
- the concentration of the alkaline aqueous solution is preferably 0.1% by mass to 5% by mass.
- the temperature of the alkaline aqueous solution is preferably 20 ° C. to 50 ° C. Specifically, for example, 50 g / L, 40 ° C. phosphoric acid aqueous solution, 0.5 g / L, 30 ° C. sodium hydroxide aqueous solution or 0.5 g / L, 30 ° C. potassium hydroxide aqueous solution is preferably used. .
- the immersion time in the acid aqueous solution or alkali aqueous solution is preferably 8 minutes to 120 minutes, more preferably 10 minutes to 90 minutes, and further preferably 15 minutes to 60 minutes.
- the immersion time refers to the total of each immersion time when a short immersion process (trimming process) is repeated. In addition, you may perform a washing process between each immersion process.
- the insulating substrate and the end of the conduction path are processed to be in the same plane after the conduction path forming process, It is preferable to selectively remove (trim) the material.
- examples of the method of processing in the same plane include physical polishing (for example, free abrasive polishing, back grinding, surface planar, etc.), electrochemical polishing, polishing combining these, and the like.
- heat treatment can be performed for the purpose of reducing distortion in the conduction path caused by metal filling.
- the heat treatment is preferably performed in a reducing atmosphere from the viewpoint of suppressing metal oxidation.
- the heat treatment is preferably performed at an oxygen concentration of 20 Pa or less, and more preferably performed in a vacuum.
- the vacuum means a state of a space having a gas density or atmospheric pressure lower than that of the atmosphere.
- the resin layer forming step is a step of forming a resin layer on the surface of the insulating substrate and the protruding portion of the conduction path after the trimming step.
- a resin composition containing the above-described antioxidant material, polymer material, solvent (for example, methyl ethyl ketone) or the like is used to protrude the surface of the insulating substrate and the conduction path. Examples include a method of applying to a part, drying, and firing as necessary.
- the coating method of the resin composition is not particularly limited, and conventionally known methods such as gravure coating method, reverse coating method, die coating method, blade coater, roll coater, air knife coater, screen coater, bar coater, curtain coater, spin coater, etc. Coating methods can be used.
- the drying method after coating is not particularly limited, for example, a treatment of heating at a temperature of 0 ° C. to 100 ° C. in the atmosphere for several seconds to several tens of minutes, and a temperature of 0 ° C. to 80 ° C. under reduced pressure, Examples of the treatment include heating for 10 minutes to several hours.
- the baking method after drying is not particularly limited because it varies depending on the polymer material to be used.
- a treatment of heating at a temperature of 160 ° C. to 240 ° C. for 2 minutes to 60 minutes for example, a treatment of heating at a temperature of 30 ° C. to 80 ° C. for 2 minutes to 60 minutes may be mentioned.
- each process described above can be carried out as a single wafer, or can be continuously processed with a web using an aluminum coil as a raw fabric. Moreover, when performing a continuous process, it is preferable to install an appropriate washing
- the member to be processed was processed by the manufacturing method of the member to be processed of Examples 1 to 20 and Comparative Example 1 shown below.
- the occurrence of defects and the post-treatment conductivity in the manufacturing methods of the processed members of Examples 1 to 20 and Comparative Example 1 were evaluated. Defect occurrence and conductivity results are shown in Tables 1 to 4 below.
- Tables 1 to 4 below show the members used in the methods for manufacturing the processed members of Examples 1 to 20 and Comparative Example 1.
- the adhesive strengths shown in Tables 1 to 4 below are values measured under conditions of a peeling angle of 180 ° and a tensile speed of 300 mm / min.
- the length of the black part of the binarized image was measured. A defect was extracted from the black portion with a threshold of 30 ⁇ m.
- Olympus Corporation semiconductor / FPD inspection microscope MX61 (trade name) was used for the infrared microscope.
- An objective lens LMRLN5XIR (trade name) for observation in the near infrared region (700 nm to 1300 nm) manufactured by Olympus Corporation was used as the lens.
- As the stage an automatic XY stage for upright microscopes manufactured by Melz Heuser was used. The occurrence of defects was expressed as N pieces / 100 cm 2 and evaluated according to the following evaluation criteria.
- D 100 ⁇ N
- Example 1 In Example 1, first, a self-peeling tape (first adhesive, SELFA manufactured by Sekisui Chemical Co., Ltd.) was attached to a disc-shaped quartz glass substrate having a diameter of 200 mm and a thickness of 1 mm. A member to be processed was bonded onto this. At this time, a vacuum bonding apparatus (modified from Ayumi Kogyo Co., Ltd.) was used for bonding the members to be processed. Thereafter, the first surface of the member to be treated was treated by chemical mechanical polishing.
- first adhesive SELFA manufactured by Sekisui Chemical Co., Ltd.
- UV irradiation was described as UV irradiation.
- the first adhesive constitutes the first adhesive layer, and the second adhesive constitutes the second adhesive layer.
- the above-described chemical mechanical polishing treatment was performed for 4 hours using a CMP (chemical mechanical polishing) slurry of PNANERLITE-7000 manufactured by Fujimi Incorporated.
- the thickness of the member to be treated after chemical mechanical polishing was 40 ⁇ m, and the surface roughness of the first and second surfaces was 0.1 ⁇ m in terms of arithmetic average roughness.
- Example 2 In Example 2, as in Example 1, first, a self-peeling tape (first adhesive) is pasted on a quartz glass substrate and the target member is pasted, and then the first surface is chemically and mechanically polished. Processed. A donut-shaped frame body made of a stainless steel plate having a thickness of 1 mm and having a sufficiently larger hole than that of the quartz glass substrate was prepared, and the above-described thermal release sheet (second adhesive) was attached to the frame body. After the thermal release sheet is affixed to the processing target using a mounter, the quartz glass substrate side is irradiated with ultraviolet rays (amount of irradiation 3000 mJ / cm 2 ) to reduce the adhesive strength of the self-peeling tape.
- first adhesive a self-peeling tape
- second adhesive the thermal release sheet
- the member to be treated was peeled off. Next, after inverting the whole frame, it was attached to the above-mentioned silicon substrate using a mounter, and the heat-peeling sheet was cut into a size of the silicon substrate by a cutter. Thereafter, the exposed untreated surface was treated by chemical mechanical polishing.
- the chemical mechanical polishing is as described in the above ⁇ Example 1>.
- Example 3 In Example 3, as in Example 1, first, a self-peeling tape (first adhesive) is attached to a quartz glass substrate, and the target member is attached, and then the first surface is chemically mechanically polished. Was processed. A donut-shaped frame made of a stainless steel plate with a thickness of 1 mm having a hole sufficiently larger than a quartz glass substrate is prepared, and intermediate temporary attachment object 1 (SPV-200 manufactured by Nitto Denko Corporation) is prepared on the frame. Pasted. The intermediate temporary attachment object 1 is attached to the first surface of the member to be processed by chemical mechanical polishing using a mounter and then irradiated with ultraviolet rays to reduce the adhesive force of the self-peeling tape and to be processed. The member was peeled off.
- the intermediate temporary attachment object 2 (Nitto Denko Co., Ltd. Riva Alpha) was affixed on the non-processed surface of the to-be-processed member on the back side of the frame.
- the intermediate temporary attachment target 1 and the intermediate temporary attachment target 2 are used by utilizing the difference in adhesive force between the intermediate temporary attachment target 1 and the intermediate temporary attachment target 2
- the intermediate temporary attachment object 1 was peeled off.
- the above-described thermal release sheet (second adhesive) was attached to the above-described silicon substrate with a mounter.
- the silicon substrate was affixed on the 1st surface of the to-be-processed member affixed on the intermediate
- the chemical mechanical polishing is as described in the above ⁇ Example 1>.
- Example 4 In Example 4, first, as in Example 1, a self-peeling tape (first adhesive) was applied to a quartz glass substrate, and after the members to be processed were attached, the first surface was chemically mechanically polished. Was processed. In the vacuum bonding apparatus, the porous first suction plate is brought into contact with the polished surface of the member to be treated and adsorbed, and then irradiated with ultraviolet rays to reduce the adhesive force of the self-peeling tape and peel the member to be treated. did. Next, the non-treated surface of the member to be processed was sucked by the second suction plate, and then the first suction plate was removed from the target member and separated from the member to be processed.
- first adhesive first adhesive
- the object to be processed adsorbed by the second suction plate in the above-described vacuum bonding apparatus.
- the member was bonded to the silicon substrate in a vacuum bonding apparatus.
- suction board was removed and it cut
- the exposed untreated surface was treated by chemical mechanical polishing.
- the chemical mechanical polishing is as described in the above ⁇ Example 1>.
- Example 5 uses SRL0759 (product name) (double-sided slightly adhesive sheet) manufactured by Lintec Co., Ltd. as a self-peeling tape (first adhesive), as compared with Example 1, and does not irradiate with ultraviolet rays.
- Example 2 is the same as Example 1 except that is peeled off.
- Example 6 is different from Example 1 in that Example 1 uses Somatack (registered trademark) PS-1151CR (product number) manufactured by Somaru Corporation for the self-peeling tape (first adhesive). Is the same.
- Example 6 The self-peeling tape used in Example 6 (Somatack (registered trademark) PS-1151CR (product number) manufactured by Somaru Co., Ltd.) continued to be heated to a temperature of 60 ° C., and when the heating was stopped, the adhesive strength decreased. For this reason, “cooling (60 ° C. ⁇ 20 ° C.)” is written in the “adhesive layer alteration condition” column of “first support” in Table 2 below.
- Somatack registered trademark
- PS-1151CR product number
- Example 7 is the same as Example 1 except that SRL0759 (product name) (double-sided slightly adhesive sheet) manufactured by Lintec Co., Ltd. was used as the heat release sheet (second adhesive) as compared to Example 1. is there.
- Example 8 is the same as Example 1 except that Somatack (registered trademark) PS-1151CR (product number) manufactured by Somar Corporation was used as the thermal release sheet (second adhesive). The same.
- the heat release sheet of Example 8 continues to be heated to a temperature of 60 ° C. as described above, and the adhesive strength decreases when the heating is stopped. For this reason, “Cooling (60 ° C. ⁇ 20 ° C.)” is described in the “Adhesive layer alteration condition” column of “Second support” in Table 2 below.
- Example 9 The ninth embodiment is the same as the first embodiment except that nothing is filled in the micropores of the member to be processed, as compared to the first embodiment.
- Example 10 is the same as Example 1 except that ITO (Indium Tin Oxide) is filled in the micropores of the member to be processed instead of copper, as compared with Example 1.
- vapor deposition was used for filling ITO (Indium Tin Oxide) into the micropores of the member to be processed.
- ITO Indium Tin Oxide
- Example 11 Example 11 is the same as Example 1 except that instead of copper, the micropores of the member to be processed are filled with aluminum instead of copper.
- Example 12 is the same as Example 1 except that magnesium is filled in the micropores of the member to be processed instead of copper. It should be noted that vapor deposition was used for filling the micropores of the member to be processed with magnesium.
- Example 13 is different from Example 1 in that the surface roughness of the first surface and the second surface after chemical mechanical polishing of the member to be processed is an arithmetic average roughness of 0.5 ⁇ m. Is the same as in Example 1.
- a silicon substrate having a diameter of 200 mm and a thickness of 0.775 mm was used instead of the quartz glass substrate having a diameter of 200 mm and a thickness of 1 mm as compared with Example 1, and a self-peeling tape (first adhesive) was used.
- Example 15 is the same as Example 1 except that a 1 mm thick quartz glass substrate was used and a self-peeling tape (Sekisui Chemical Co., Ltd. Selfa) was used as the heat-peeling sheet (second adhesive).
- Example 15 is the same as Example 1 except that the thickness of the member to be processed after chemical mechanical polishing is 80 ⁇ m, as compared to Example 1.
- Example 16 is the same as Example 1 except that laser irradiation was used to reduce the adhesive strength of the self-peeling tape (first adhesive) as compared to Example 1.
- MD-X1500 model manufactured by Keyence Corporation was used. Laser irradiation was carried out at a wavelength of 380 nm, an output of 5 W, a scanning speed of 3 m / sec, and a feed width of 50 ⁇ m.
- Example 17 a disc-shaped quartz glass substrate having a diameter of 200 mm and a thickness of 1 mm was used instead of the disc-shaped silicon (Si) substrate having a diameter of 200 mm and a thickness of 0.775 mm as compared with Example 1.
- a self-peeling tape (Sekisui Chemical Co., Ltd., Selfa) was attached to the quartz glass substrate as a heat-peeling sheet (second adhesive).
- Example 18 is the same as Example 1 except that the micropore pore diameter is 100 nm and the micropore density is 5 million / cm 2 as compared to Example 1.
- Example 18 was produced in the same manner as Example 1 except that the voltage was changed in ⁇ Anodizing treatment step> described later.
- Example 19 is the same as Example 1 except that mechanical polishing was performed instead of chemical mechanical polishing of the member to be processed, as compared to Example 1.
- the mechanical polishing is the same as the chemical mechanical polishing described above except that the CMP slurry is changed to a diamond abrasive.
- the surface roughness of the 1st surface and the 2nd surface after chemical mechanical polishing of the to-be-processed member was 1 micrometer or more in arithmetic mean roughness.
- Example 19 is the same as Example 1 except that the thickness of the quartz glass substrate is 2 mm and the thickness of the silicon substrate is 1.5 mm, as compared to Example 1.
- Comparative Example 1 Compared to Example 1, Comparative Example 1 was carried out except that the order of the process of pasting the treated member of Example 1 on the thermal release sheet and the process of peeling the treated member from the self-peeling tape were changed. Same as Example 1.
- the treated members used in Examples 1 to 20 and Comparative Example 1 will be described below.
- the member to be treated was configured using aluminum oxide.
- the aluminum oxide material which is a member to be processed is produced by the steps shown below.
- ⁇ Electropolishing process> As the substrate, a high-purity aluminum substrate (manufactured by Sumitomo Light Metal Co., Ltd. (manufactured by UACJ Co., Ltd.), purity 99.99 mass%, thickness 0.2 mm) was used.
- the aluminum substrate was cut so that it could be anodized with an area of 220 mm in diameter, and was electropolished using an electropolishing liquid having the composition shown below under conditions of a voltage of 25 V, a liquid temperature of 65 ° C., and a liquid flow rate of 3.0 m / min. .
- the cathode was a carbon electrode, and GP0110-30R (manufactured by Takasago Seisakusho Co., Ltd.) was used as the power source.
- the flow rate of the electrolyte was measured using a vortex flow monitor FLM22-10PCW manufactured by AS ONE Corporation.
- Electrolytic polishing liquid composition ⁇ 85% by mass phosphoric acid (reagent manufactured by Wako Pure Chemical Industries, Ltd.) 660 mL (milliliter) ⁇ Pure water 160mL ⁇ Sulfuric acid 150mL ⁇ Ethylene glycol 30mL
- ⁇ Anodizing treatment process> pre-anodization for 5 hours is performed on the aluminum substrate after the electropolishing treatment with an electrolytic solution of 0.30 mol / L (liter) sulfuric acid under conditions of a voltage of 25 V, a liquid temperature of 15 ° C., and a liquid flow rate of 3.0 m / min. Treated. Thereafter, a film removal treatment was performed in which the aluminum substrate after the pre-anodizing treatment was immersed in a mixed aqueous solution (liquid temperature: 50 ° C.) of 0.2 mol / L chromic anhydride and 0.6 mol / L phosphoric acid for 12 hours.
- a mixed aqueous solution liquid temperature: 50 ° C.
- re-anodization treatment was performed for 1 hour with an electrolyte of 0.30 mol / L sulfuric acid under conditions of a voltage of 25 V, a liquid temperature of 15 ° C., and a liquid flow rate of 3.0 m / min.
- the cathode was a stainless electrode
- the power supply was GP0110-30R (manufactured by Takasago Seisakusho Co., Ltd.).
- NeoCool BD36 manufactured by Yamato Kagaku Co., Ltd.
- Pair Stirrer PS-100 manufactured by EYELA Tokyo Rika Kikai Co., Ltd.
- the flow rate of the electrolyte was measured using a vortex flow monitor FLM22-10PCW manufactured by AS ONE Corporation.
- the aluminum substrate is dissolved by dipping in 20% by mass mercury chloride aqueous solution (raised) at 20 ° C. for 3 hours, and further immersed in 5% by mass phosphoric acid at 30 ° C. for 30 minutes to form the bottom of the anodized film.
- the structure (insulating base material) which consists of an anodic oxide film which has the through-hole which consists of micropores was removed.
- the micropore diameter was 70 nm, and the micropore density was 10 million / cm 2 .
- a copper electrode was brought into close contact with one surface of the structure after the penetration treatment described above, and electrolytic plating was performed using the copper electrode as a cathode and platinum as a positive electrode.
- electrolytic plating was performed using the copper electrode as a cathode and platinum as a positive electrode.
- a filled structure an anisotropic conductive member precursor
- the constant voltage pulse electrolysis is carried out by performing cyclic voltammetry in a plating solution using a plating apparatus manufactured by Yamamoto Kakin Tester Co., Ltd.
- the pulse waveform of constant voltage pulse electrolysis was a rectangular wave. Specifically, the electrolysis treatment of one electrolysis time of 60 seconds was performed five times with a 40-second rest period between each electrolysis treatment so that the total electrolysis treatment time was 300 seconds.
- Example 1 to 20 the number of generated defects of 30 ⁇ m or more was smaller than that in Comparative Example 1.
- Examples 1 to 8 and Examples 10 to 20 gave better results than Comparative Example 1.
- the first adhesive was different from that in Example 1, and the number of defects was slightly larger than that in Example 1.
- the second adhesive was different from that in Example 1, and the number of defects was larger than that in Example 1.
- Example 9 was different from Example 1 in that there was no conductor species, and the number of defects was slightly larger than that of Example 1, and the conductivity was inferior.
- Examples 10 to 12 differed from Example 1 in the type of conductor, and had a slightly larger number of defects and slightly inferior conductivity than Example 1.
- the arithmetic average roughness of Example 13 and Example 19 was coarser than that of Example 1, and the conductivity was slightly inferior to that of Example 1.
- the present invention is basically configured as described above. As mentioned above, although the manufacturing method and laminated body of the to-be-processed member of this invention were demonstrated in detail, this invention is not limited to the above-mentioned embodiment, In the range which does not deviate from the main point of this invention, various improvement or a change is carried out. Of course.
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Abstract
Description
図48に示すように、第1の支持体100を用意する。第1の支持体100には、例えば、ガラス基板またはシリコンウエハが用いられる。
次に、図49に示すように第1の支持体100に第1の仮接着層102を設ける。第1の仮接着層102は、露光または加熱により接着力が低減する仮接着剤または仮接着シート等で構成される。
次に、図50に示すように裏面104bを第1の仮接着層102に向けて、基板104を第1の仮接着層102に貼り合せる。この状態で、基板104の表面104aに、研磨または研削等の平滑化処理を施す。
次に、図52に示すように、第2の支持体106を用意する。第2の支持体106は、第1の支持体100と同じく、例えば、ガラス基板またはシリコンウエハが用いられる。
次に、図53に示すように、第2の支持体106に第2の仮接着層108を設ける。第2の仮接着層108は、第1の仮接着層102と同じく、露光または加熱により接着力が低減する仮接着剤または仮接着シート等で構成される。
次に、図54に示すように、表面104aを第2の仮接着層108に向けて、基板104を第2の仮接着層108に貼り合せる。この状態で、基板104の裏面104bに、研磨または研削等の平滑化処理を施す。このようにして、基板104の両面に平滑化処理を施している。
特許文献1の薄膜脆性材料の表面研磨方法には、厚さ500μm以下、かつヤング率1.0×108以上の薄膜脆性材料を一方の面を固定して他方の面を研磨する方法において、薄膜脆性材料の固定された面と接する固定用表面に深さまたは高さ5~100μm、ピッチ30~2000μmの凹凸が設けられており、固定される面と研磨される面とを相互に変更して、少なくとも一方の面を2回以上研磨して両面を研磨することが記載されている。薄膜脆性材料として、陽極酸化皮膜を主体とする構造体が挙げられている。
特許文献1では、薄膜脆性材料を固定部材にWAX接着剤(日化精工製アルコワックス)を用いて固定した後、貼り付け面と反対の面を研磨し、研磨済みの面を固定部材にWAX接着剤を用い貼り付け固定した後、他方の面を研磨することが記載されている。
また、上述の特許文献2は、半導体を対象としており、半導体よりも脆性が低い等、脆弱な材料には対応できない可能性がある。
このように、脆性が低い等の脆弱なものに対して両面に平滑化処理を施す場合、安定して実施できないのが現状である。
第1面加工工程と第1の接着層除去工程との間に、第1の接着層の接着力を低減させる第1の接着層変質工程を含むことが好ましい。
第1の接着層変質工程が露光および加熱のうち少なくとも一方を含むことが好ましい。
第2面加工工程の後に、第2の接着層の接着力を低減させる第2の接着層変質工程を含むことが好ましい。
第2の接着層変質工程が露光および加熱のうち少なくとも一方を含むことが好ましい。
第2接合工程と第2面加工工程との間に第1の接着層除去工程を含むことが好ましい。
第1の転写支持体および第2の転写支持体のうち少なくとも一方が、接着性を有する仮支持体であることが好ましい。
第1の転写支持体および第2の転写支持体のうち少なくとも一方が、金属酸化物を含有する被処理部材を吸着する吸着支持体であることが好ましい。
第2接合工程が、第2の支持体に設けられた第2の接着層に金属酸化物を含有する被処理部材を貼付する工程であることが好ましい。
第1接合工程が、第1の支持体に設けられた第1の接着層に金属酸化物を含有する被処理部材を貼付する工程であることが好ましい。
第2面加工工程が、金属酸化物を含有する被処理部材の面のうち第1の接着層と接していた面を加工する工程であることが好ましい。
第1の接着層の接着力が第2の接着層の接着力よりも常に小さいことが好ましい。
第1の支持体および第2の支持体のうち少なくとも一方が、透過領域を少なくとも1ヶ所有し、透過領域は透過率が200~500nmの波長範囲において70%以上であることが好ましい。
金属酸化物を含有する被処理部材における第1加工面と第2加工面の間の距離が50μm以下であることが好ましい。露光がレーザー照射または紫外線照射であることが好ましい。
第1の接着層および第2の接着層のうち少なくとも一方が、加熱により接着層の接着性を低減させる材料を含むことが好ましい。
なお、以下に説明する図は、本発明を説明するための例示的なものであり、以下に示す図に本発明が限定されるものではない。
なお、以下において数値範囲を示す「~」とは両側に記載された数値を含む。例えば、εが数値α~数値βとは、εの範囲は数値αと数値βを含む範囲であり、数学記号で示せばα≦ε≦βである。
「直交」等の角度は、特に記載がなければ、該当する技術分野で一般的に許容される誤差範囲を含む。また、「同一」とは、該当する技術分野で一般的に許容される誤差範囲を含む。
図1~図7は本発明の実施形態の被処理部材の製造方法の第1の例を工程順に示す模式図である。図1~図7は、それぞれ本発明の実施形態の被処理部材の製造方法の第1の例の一工程を示す模式図である。
被処理部材の製造方法の第1の例では、金属酸化物を含有する被処理部材として、異方導電性部材を例にして説明するが、金属酸化物を含有する被処理部材のことを、基板14として説明する。
被処理部材の製造方法の第1の例では、基板14として、円板のものを例にして説明するが、形状としては円板に限定されるものではない。
なお、異方導電性部材は、陽極酸化膜等で構成される絶縁性基材40(図8参照)を有する脆性材料である。また、金属酸化物を含有する被処理部材は、異方導電性部材に限定されるものではない。異方導電性部材は後に詳細に説明する。
次に、図2に示すように、第1の接着層12を第1の支持体10の表面10aに貼付する。なお、第1の接着層12は、剥離可能な接着層であれば、特に限定されるものではない。剥離可能な接着層としては、剥離可能な両面接着フィルムであってもよく、接着性が低い接着層であってもよく、露光および加熱のうち少なくとも一方により、接着性が低下する接着層であってもよい。露光および加熱のうち少なくとも一方により、接着性が低下する接着層であることが好ましい。加熱により接着性が低下する接着層の例としては、日東電工株式会社製リバアルファ(登録商標)またはソマール株式会社製ソマタック(登録商標)が挙げられる。露光、すなわち光照射により接着性が低下する接着層としては一般的なダイシングテープとして用いられているような材料を使うことができる他、積水化学工業株式会社製セルファの光剥離フィルムも例として挙げられる。また、第1の接着層12は、露光および加熱のうち少なくとも一方により、接着力が低下する等、接着性が低減する機能を有する接着剤組成物を用いて形成することもできる。露光には、レーザー光によるレーザー照射および紫外光を用いた紫外線照射が含まれる。
なお、図3に示すような第1の支持体10、第1の接着層12および基板14をこの順に有する積層体17は、本発明の被処理部材の製造方法に用いられる。
図3に示す状態で基板14の第1面14aを加工して第1加工面を形成する。上述の第1面14aを加工して第1加工面を形成する工程が第1面加工工程である。第1面加工工程としては、例えば、化学的機械的研磨(CMP)、ドライエッチングまたは研削による平滑化処理、および表面へのパターン形成等が挙げられる。
図8に示す状態の基板14の第1面14aに平滑化処理を施すことで、図9に示すように第1面14aを平坦にする。この場合、基板14の第1面14aは、算術平均粗さ(JIS(Japanese Industrial Standards) B 0601-2001)が1μm以下の面であることが好ましい。
平滑化処理は、例えば、平滑化処理を終了する第1面14aの反射率を予め定めておき、反射率が、予め定められた値になったとき終了する。これ以外に、予め削る量を定めておき、削った量が予め定められた値になったとき、平滑化処理を終了してもよい。
上述の第1の接着層12の接着力を低減させる工程が第1の接着層変質工程である。上述の第1の接着層12を除去する工程が第1の接着層除去工程である。
レーザー光は、例えば、YAG(Yttrium Aluminum Garnet)レーザー装置を用いて照射される。第1の接着層12が紫外光により接着力が低減するものであれば、紫外光を照射して接着力を低減する。
なお、第1の接着層12の接着力を低減させることは、後述の第2の接着層18接触後であってもよい。第1の接着層12が自己剥離型の場合は、第1の接着層12の除去のタイミングが第2の接着層18の接触と接合を終えた後に限られる。
なお、透過率は、JIS(Japanese Industrial Standards) R 3106-1985で規定されるものである。
第2の接着層18は、例えば、第1の接着層12と同じ構成である。しかしながら、基板14から第1の接着層12を剥がす際に、第2の接着層18が基板14から剥がれないようにするために第1の接着層12の接着力が第2の接着層18の接着力よりも常に小さいことが好ましい。ここで、第1の接着層の接着力が、第2の接着層の接着力よりも常に小さいとは、少なくとも第1接合工程から第2接合工程の間において、接着力が常に小さいことを意味する。すなわち、レーザー光の照射または紫外光の照射により第1の接着層12の接着力が低減しない状態であっても、第1の接着層12の接着力が第2の接着層18の接着力よりも小さいことが好ましい。また、後述する第1の接着層除去工程において、第2の接着層18の接着力の方が、第1の接着層12の接着力よりも常に大きいことが好ましい。
第1の接着層12の接着力と第2の接着層18の接着力は、例えば、接着剤の種類を変えることにより調整することができる。
次に、例えば、真空貼り合せ装置(図示せず)を用いて、真空雰囲気で基板14の第1面14aに第2の接着層18を接触させて貼付して、図5に示すように第2の支持体16と基板14とを接合する。上述の基板14の第1面14aに第2の接着層18を接触させる工程が第1面接触工程であり、図5に示す工程が、第2の支持体16と基板14とを接合する工程が第2接合工程である。
次に、第1の接着層12を除去し、図6に示すように、第1の支持体10と基板14とを剥離する。これにより、第1面14aが第2の接着層18に接合され、第2面14bが露出する。
また、第1加工面と第2加工面の間の距離が50μm以下であること、すなわち、基板14の第1面14aと基板14の第2面14bとの間の距離Dt(図46参照)が50μm以下である態様に適用することが好ましい。このように厚さが50μm以下と薄いものであっても両面に平滑化処理を施すことができる。
ここで、基板14の第1面14aと基板14の第2面14bとの間の距離(図示せず)は、非接触の位置検出センサを基板14の両側に配置させて測定する。位置検出センサには、例えば、キーエンス株式会社製のレーザー式変位センサが用いられる。
また、第2面加工工程は、金属酸化物を含有する被処理部材の面のうち第1の接着層12と接していた面を加工する工程であることが好ましい。
以上のようにして、絶縁性基材40(図8参照)を有する異方導電性部材である基板14の第1面14aと第2面14bの両面に対して平滑化処理を施すことができる。
第2の支持体16側から、例えば、レーザー光(図示せず)または紫外光(図示せず)の照射、または加熱により、第2の接着層18の接着力を低減させ、第2の接着層18を除去し、第2の支持体16から基板14を剥離する。これにより、第1面14aと第2面14bが平滑化処理された基板14を得ることができる。紫外線照射の露光量としては、限定的ではないが、2500~3500mJ/cm2であることが好ましく、2800~3300mJ/cm2であることが更に好ましい。
上述の露光または加熱により、第2の接着層18の接着力を低減させる工程が第2の接着層変質工程である。第2の接着層18の接着力を低減させる場合、露光と加熱を組み合わせてもよい。上述の第2の接着層18を除去する工程が第2の接着層除去工程である。
第2の接着層18がレーザー光の照射または紫外光の照射により接着力が低減するものであるとき、第2の支持体16を、レーザー光または紫外光を透過するもので構成することが好ましい。この場合、第2の支持体16は、第1の支持体10と同じく、全体がレーザー光または紫外光を透過するものであってもよいが、例えば、透過領域を少なくとも1ヶ所有することが好ましい。透過領域は透過率が200~500nmの波長範囲において70%以上であることが好ましい。
なお、透過率は、第1の支持体10と同じく、JIS(Japanese Industrial Standards) R 3106-1985で規定されるものである。
また、第1の支持体10と第2の支持体16とは同じもので構成してもよく、異なるもので構成してもよい。例えば、第1の支持体10と第2の支持体16を、いずれも石英ガラス基板またはシリコン基板としてもよい。また、第1の支持体10を石英ガラス基板またはシリコン基板とし、第2の支持体16をシリコン基板または石英ガラス基板としてもよい。
図10~図18は、本発明の実施形態の被処理部材の製造方法の第2の例を工程順に示す模式図である。図10~図18は、それぞれ本発明の実施形態の被処理部材の製造方法の第2の例の一工程を示す模式図である。図19は本発明の実施形態の被処理部材の製造方法の第2の例に用いられる仮支持体を示す模式的平面図である。
なお、図10~図19において、図1~図7に示す構成物と同じ構成物には同一符号を付して、その詳細な説明は省略する。
被処理部材の製造方法の第2の例では、接着性を有する仮支持体20(図13および図19参照)を用いる。仮支持体20は、基板14を支持するものであり、図13および図19に示すように開口部22aを有する枠体22に、接着シート24が貼り付けられたものである。
枠体22は、例えば、ステンレス鋼で構成される。開口部22aは、基板14の平面視での外接円よりも大きい直径を有する円形状の穴である。開口部22aの形状は、特に限定されるものではない。開口部22aは小さい方が、枠体22の剛性を高くすることができ、枠体22を小さくすることもできる。また、枠体22は小さい方が、搬送が容易であり、かつ貼り付けに用いられるマウンター等の貼り付け装置を小さくすることができるため好ましい。
次に、基板14の第1面14aに接着シート24を、例えば、マウンター(図示せず)を用いて貼り付ける(図14参照)。
基板14の第1面14aへの接着シート24の貼り付けは、常圧雰囲気で行うことができ、真空雰囲気にする必要がない。このため、生産時間を短縮でき、かつ生産設備を簡素化できる。基板14の第1面14aに接着シート24を貼り付ける際、接着シート24に、例えば、ローラをかけて接着面の気泡を取り除くようにしてもよい。
次に、図14に示すように、接着シート24で基板14の第1加工面である第1面14aが支持された状態で、被処理部材の製造方法の第1の例と同じく、第1の支持体10側からレーザー光または紫外光を照射し、第1の接着層12を除去することで、基板14と第1の支持体10とを剥離する。これにより、仮支持体20の接着シート24に基板14が接合された状態となる。接着シート24が第1面14aに接触する前または接触した後に上述の第1の接着層変質工程を含んでもよい。
なお、レーザー光または紫外光は、例えば、YAG(Yttrium Aluminum Garnet)レーザー装置またはアズワン ハンディータイプUV照射装置を用いて照射される。
次に、図16に示すように、第2の支持体16を、仮支持体20の接着シート24に、例えば、マウンター(図示せず)を用いて貼付する。基板14の第1面14a、すなわち、第1加工面に接着シート24が設けられており、この接着シート24が第2の接着層18(図18参照)となるものである。接着シート24に第2の支持体16を貼付する工程が第2接合工程となる。この場合も、常圧雰囲気で行うことができ、真空雰囲気にする必要がない。このように基板14の移載の際に真空雰囲気にする必要がないことから、生産時間を短縮でき、かつ生産設備を簡素化できる。
第2の支持体16側から、例えば、レーザー光(図示せず)または紫外光(図示せず)の照射、または加熱により、第2の接着層18の接着力を低減させ、第2の接着層18を除去し、第2の支持体16から基板14を剥離する。これにより、第1面14aと第2面14bが平滑化処理された基板14を得ることができる。
図20~図28は、本発明の実施形態の被処理部材の製造方法の第3の例を工程順に示す模式図である。図20~図28は、それぞれ本発明の実施形態の被処理部材の製造方法の第3の例の一工程を示す模式図である。
なお、図20~図28において、図10~図19に示す構成物と同じ構成物には同一符号を付して、その詳細な説明は省略する。
また、被処理部材の製造方法の第3の例において、図23および図24に示す工程は、被処理部材の製造方法の第2の例の図13および図14に示す工程と同じであるため、詳細な説明は省略する。
被処理部材の製造方法の第3の例では、仮支持体20の接着シート24に基板14の第1面14aを貼り付けた後(図24参照)、図25に示すように、接着シート26を開口部22aを覆って枠体22に貼り付ける。そして、基板14の第2面14bに接着シート26を貼り付ける。上述の仮支持体21の接着シート24に基板14の第1面14aを貼り付ける工程が、第1転写工程となる。
接着シート26は、接着シート24よりも接着力が大きいため、接着力差を利用して基板14を接着シート24から剥離させ、図26に示すように基板14の第2面14bと接着シート26とだけ貼り付ける。基板14の第2面14bと接着シート26とを貼り付ける工程が第2転写工程となる。
図27に示すように、接着シート26に貼り付けられた基板14の第1面14aに、第2の接着層18を対向して上述の第2の支持体16を配置する。
基板14の第1面14aと第2の接着層18とを接触させて、上述のようにマウンター(図示せず)を用いて貼り付ける。これにより、第2の支持体16上に設けられた第2の接着層18に第1面14aを向けて基板14が貼付される。第2の支持体16上に設けられた第2の接着層18に基板14を貼付する工程が第2接合工程となる。
例えば、第2の支持体16側から、例えば、加熱または露光により、第2の接着層18の接着力を低減させ、第2の接着層18を除去し、第2の支持体16から基板14を剥離する。これにより、第1面14aと第2面14bが加工された基板14を得ることができる。
図29~図39は、本発明の実施形態の被処理部材の製造方法の第4の例を工程順に示す模式図である。図29~図39は、それぞれ本発明の実施形態の被処理部材の製造方法の第4の例の一工程を示す模式図である。
なお、図29~図39において、図10~図19に示す構成物と同じ構成物には同一符号を付して、その詳細な説明は省略する。
第1の転写支持体30は基板14を吸着する吸着支持体であり、基板14との接触状態を支持するものである。第1の転写支持体30は、例えば、多孔質板で構成され、かつ減圧装置に接続されている。減圧装置による第1の転写支持体30を介した吸着により基板14と第1の転写支持体30との接触状態が支持される。
基板14は第1の転写支持体30に吸着されて支持された状態で、第1の支持体10側からレーザー光または紫外光を照射し、図33に示すように、第1の接着層12を基板14から除去し、基板14から第1の支持体10を取り除く。なお、転写支持体30が第1面14aに接触する前または接触した後に第1の接着層変質工程を含んでもよい。これにより、第1の転写支持体30に基板14が吸着された状態となる。
第2の転写支持体32を基板14の第1加工面以外の面である第2面14bに接触させ、第2の転写支持体32により基板14を吸着し、基板14を、第1の転写支持体30と第2の転写支持体32とで吸着した状態とする。次に、第2の転写支持体32による基板14の吸着は維持し、第1の転写支持体30による基板14の吸着を停止する。これにより、第1の転写支持体30と基板14の第1面14aとが接触した状態を解除する。図35に示すように、基板14は、第1面14aを露出させた状態で第2の転写支持体32に吸着された状態となる。この工程が第2の転写支持体32に基板14が転写される第2転写工程となる。
次に、図37に示すように、第2の転写支持体32に吸着された基板14の第1面14aに対向して、第2の接着層18を向けて第2の支持体16を配置する。
次に、図38に示すように、基板14の第1面14aと第2の接着層18とを接触させて、上述のようにマウンター(図示せず)を用いて貼り付ける。これにより、第2の支持体16上に設けられた第2の接着層18に第1面14aを向けて基板14が貼付される。
次に、図39に示すように、第2の転写支持体32による基板14の吸着を停止する。これにより、基板14の第2面14bが露出された状態で第2の支持体16と基板14とが第2の接着層18を介して接合される。第2の支持体16と基板14とが第2の接着層18を介して接合される工程が第2接合工程となる。
なお、基板14の第1面14aと第2の接着層18とを接合する際に、第1面14aと第2の接着層18との接合界面への気泡の混入を防ぐために真空雰囲気で接合することが好ましい。
第2の支持体16側から、例えば、レーザー光(図示せず)または紫外光(図示せず)の照射、または加熱により、第2の接着層18の接着力を低減させ、第2の接着層18を除去し、第2の支持体16から基板14を剥離する。これにより、第1面14aと第2面14bが加工された基板14を得ることができる。
例えば、被処理部材の製造方法の第3の例の図24に示す状態において、図40に示すように、接着シート24に基板14が接合された仮支持体20(図24参照)について、基板14の第2面14bに対向して第2の転写支持体32を配置する。
次に、図41に示すように、第2の転写支持体32と基板14の第2面14bとを接触させた後、第2の転写支持体32により基板14を吸着する。この状態で、例えば、接着シート24を加熱し、接着シート24の接着力を低減させて剥離し、接着シート24を除去する。これにより、図42に示すように、基板14の第2面14bが第2の転写支持体32に吸着され、基板14の第1面14aが露出した状態となる。
そして、上述の図36に示すように第2の接着層18が表面16aに設けられた第2の支持体16を用意する。以降は、上述の被処理部材の製造方法の第4の例の通りである。
仮支持体21の接着シート24を、基板14の第2面14bに接触させて、例えば、マウンター(図示せず)を用いて貼り合せる。
次に、第1の転写支持体30の吸着を停止し、第1の転写支持体30を基板14から離間させる。
基板14の第1面14aと第2の接着層18とを接触させて、上述のようにマウンター(図示せず)を用いて貼り付ける。次に、接着力を低減させて接着シート24を除去する。これにより、図28に示すように、基板14の第2面14bが露出された状態で第2の支持体16と基板14とが第2の接着層18を介して接合される。次に、基板14の第2面14bに対して加工を施す。以上のようにして、基板14の第1面14aと第2面14bに対して加工を施すことができる。
図45は被処理部材に用いられる異方導電性部材の構成の一例を示す平面図であり、図46は被処理部材に用いられる異方導電性部材の構成の一例を示す模式的断面図であり、図47は被処理部材に用いられる異方導電性部材を有する異方導電材の構成の一例を示す模式的断面図である。
異方導電性部材15は、上述のように基板14の両面が平滑化処理された状態では、図46に示すように第1面14aおよび第2面14bはいずれも導通路42が突出しておらず、平坦な面である。
絶縁性基材40は、例えば、アルミニウムの陽極酸化物により構成される。導通路42は、絶縁性基材40の厚み方向に貫通した貫通路41の内部に金属を充填したものである。例えば、アルミニウムの陽極酸化膜に形成されたマイクロポアの内部に金属が充填されて導通路42が構成される。
異方導電性部材15は、導通路42が互いに電気的に絶縁されており、絶縁性基材40の厚み方向Z(図46参照)と直交する方向xには導電性が十分に低く、厚み方向Zに導電性を有する。このように異方導電性部材15は異方導電性を示す部材である。
さらに、導通路42は、上述のトリミング処理により図46に示すように、絶縁性基材40の表面40aおよび40bから突出した突出部分42aおよび突出部分42bを有する構成でもよい。異方導電性部材15は、さらに、絶縁性基材40の表面40aおよび裏面40bに設けられた樹脂層44を具備してもよい。樹脂層44は、粘着性を備え、接合性を付与するものでもある。突出部分42aおよび突出部分42bの長さは、6nm以上であることが好ましく、より好ましくは30nm~500nmである。
同様に、図46に示すように導通路42は両端に突出部分42aおよび突出部分42bがあるが、これに限定されるものではなく、絶縁性基材40の少なくとも樹脂層44を有する側の表面に突出部分を有する構成でもよい。
ここで、異方導電性部材15の厚みhは、異方導電性部材15を、電界放出形走査型電子顕微鏡により20万倍の倍率で観察し、異方導電性部材15の輪郭形状を取得し、厚みhに相当する領域について10点測定した平均値のことである。
また、異方導電性部材15のTTV(Total Thickness Variation)は、異方導電性部材15をダイシングで支持基体46ごと切断し、異方導電性部材15の断面形状を観察して求めた値である。
支持基体46は、異方導電性部材15を支持するものであり、例えば、シリコン基板で構成されている。支持基体46としては、シリコン基板以外に、例えば、SiC、SiN、GaNおよびアルミナ(Al2O3)等のセラミックス基板、ガラス基板、繊維強化プラスチック基板、ならびに金属基板を用いることができる。繊維強化プラスチック基板には、プリント配線基板であるFR-4(Flame Retardant Type 4)基板等も含まれる。
ここで、透明とは、位置合せに使用する波長の光で透過率が80%以上であることをいう。このため、波長400~800nmの可視光全域で透過率が低くてもよいが、波長400~800nmの可視光全域で透過率が80%以上であることが好ましい。透過率は、分光光度計により測定される。
剥離剤49には、例えば、日東電工株式会社製リバアルファ(登録商標)、およびソマール株式会社製ソマタック(登録商標)等を用いることができる。
〔絶縁性基材〕
絶縁性基材は、無機材料からなり、従来公知の異方導電性フィルム等を構成する絶縁性基材と同程度の電気抵抗率(1014Ω・cm程度)を有するものであれば特に限定されない。
なお、「無機材料からなり」とは、後述する樹脂層を構成する高分子材料と区別するための規定であり、無機材料のみから構成された絶縁性基材に限定する規定ではなく、無機材料を主成分(50質量%以上)とする規定である。
ここで、バルブ金属としては、具体的には、例えば、アルミニウム、タンタル、ニオブ、チタン、ハフニウム、ジルコニウム、亜鉛、タングステン、ビスマス、アンチモン等が挙げられる。これらのうち、寸法安定性がよく、比較的安価であることからアルミニウムの陽極酸化膜(基材)であることが好ましい。
ここで、各導通路の間隔とは、隣接する導通路間の幅w(図46参照)をいい、異方導電性部材の断面を電界放出形走査型電子顕微鏡により20万倍の倍率で観察し、隣接する導通路間の幅を10点で測定した平均値をいう。
複数の導通路は、絶縁性基材の厚み方向に貫通し、互いに電気的に絶縁された状態で設けられた、導電材からなる。導通路は導電体である。
導通路は、絶縁性基材の表面から突出した突出部分を有しており、かつ、各導通路の突出部分の端部が後述する樹脂層に埋設されていてもよい。
導通路を構成する導電材は、電気抵抗率が103Ω・cm以下の材料であれば特に限定されず、その具体例としては、金(Au)、銀(Ag)、銅(Cu)、アルミニウム(Al)、マグネシウム(Mg)、ニッケル(Ni)、インジウムがドープされたスズ酸化物(ITO)等が好適に例示される。
中でも、電気伝導性の観点から、銅、金、アルミニウム、およびニッケルが好ましく、銅および金がより好ましい。上述の導通路、すなわち、導電体は、未酸化の金属で構成されることが好ましい。未酸化の金属は、例えば、遷移金属であり、遷移金属は、例えば、上述の銅である。
導通路の突出部分は、導通路が絶縁性基材の表面から突出した部分であり、また、突出部分の端部は、樹脂層に埋設している。
導通路の突出部分の高さは、異方導電性部材の断面を電界放出形走査型電子顕微鏡により2万倍の倍率で観察し、導通路の突出部分の高さを10点で測定した平均値をいう。
導通路の突出部分の直径は、異方導電性部材の断面を電界放出形走査型電子顕微鏡により観察し、導通路の突出部分の直径を10点で測定した平均値をいう。
導通路は柱状であり、導通路の直径d(図46参照)は、突出部分の直径と同様、5nm超10μm以下であることが好ましく、20nm~1000nmであることがより好ましく、100nm以下であることがさらに好ましい。
樹脂層は、絶縁性基材の表面に設けられ、上述の導通路を埋設するものである。すなわち、樹脂層は、絶縁性基材の表面、および絶縁性基材から突出した導通路の端部を被覆するものである。
樹脂層は、接続対象に対して接合性を付与するものである。樹脂層は、例えば、50℃~200℃の温度範囲で流動性を示し、200℃以上で硬化するものであることが好ましい。
以下、樹脂層の組成について説明する。樹脂層は、高分子材料を含有するものである。樹脂層は酸化防止材料を含有してもよい。
樹脂層に含まれる高分子材料としては特に限定されないが、半導体チップまたは半導体ウエハと異方導電性部材との隙間を効率よく埋めることができ、半導体チップまたは半導体ウエハとの密着性がより高くなる理由から、熱硬化性樹脂であることが好ましい。
熱硬化性樹脂としては、具体的には、例えば、エポキシ樹脂、フェノール樹脂、ポリイミド樹脂、ポリエステル樹脂、ポリウレタン樹脂、ビスマレイミド樹脂、メラミン樹脂、イソシアネート系樹脂等が挙げられる。
なかでも、絶縁信頼性がより向上し、耐薬品性に優れる理由から、ポリイミド樹脂および/またはエポキシ樹脂を用いるのが好ましい。
樹脂層に含まれる酸化防止材料としては、具体的には、例えば、1,2,3,4-テトラゾール、5-アミノ-1,2,3,4-テトラゾール、5-メチル-1,2,3,4-テトラゾール、1H-テトラゾール-5-酢酸、1H-テトラゾール-5-コハク酸、1,2,3-トリアゾール、4-アミノ-1,2,3-トリアゾール、4,5-ジアミノ-1,2,3-トリアゾール、4-カルボキシ-1H-1,2,3-トリアゾール、4,5-ジカルボキシ-1H-1,2,3-トリアゾール、1H-1,2,3-トリアゾール-4-酢酸、4-カルボキシ-5-カルボキシメチル-1H-1,2,3-トリアゾール、1,2,4-トリアゾール、3-アミノ-1,2,4-トリアゾール、3,5-ジアミノ-1,2,4-トリアゾール、3-カルボキシ-1,2,4-トリアゾール、3,5-ジカルボキシ-1,2,4-トリアゾール、1,2,4-トリアゾール-3-酢酸、1H-ベンゾトリアゾール、1H-ベンゾトリアゾール-5-カルボン酸、ベンゾフロキサン、2,1,3-ベンゾチアゾール、o-フェニレンジアミン、m-フェニレンジアミン、カテコール、o-アミノフェノール、2-メルカプトベンゾチアゾール、2-メルカプトベンゾイミダゾール、2-メルカプトベンゾオキサゾール、メラミン、およびこれらの誘導体が挙げられる。
これらのうち、ベンゾトリアゾールおよびその誘導体が好ましい。
ベンゾトリアゾール誘導体としては、ベンゾトリアゾールのベンゼン環に、ヒドロキシル基、アルコキシ基(例えば、メトキシ基、エトキシ基等)、アミノ基、ニトロ基、アルキル基(例えば、メチル基、エチル基、ブチル基等)、ハロゲン原子(例えば、フッ素、塩素、臭素、ヨウ素等)等を有する置換ベンゾトリアゾールが挙げられる。また、ナフタレントリアゾール、ナフタレンビストリアゾール、と同様に置換された置換ナフタレントリアゾール、置換ナフタレンビストリアゾール等も挙げることができる。
樹脂層は、樹脂層に含有し得る金属イオン、ハロゲンイオン、ならびに半導体チップおよび半導体ウエハに由来する金属イオンをトラップすることによって絶縁信頼性がより向上する理由から、マイグレーション防止材料を含有しているのが好ましい。
ここで、陽イオン交換体および陰イオン交換体は、それぞれ、例えば、後述する無機イオン交換体および有機イオン交換体の中から適宜選択することができる。
無機イオン交換体としては、例えば、含水酸化ジルコニウムに代表される金属の含水酸化物が挙げられる。
金属の種類としては、例えば、ジルコニウムのほか、鉄、アルミニウム、錫、チタン、アンチモン、マグネシウム、ベリリウム、インジウム、クロム、ビスマス等が知られている。
これらの中でジルコニウム系のものは、陽イオンのCu2+、Al3+について交換能を有している。また、鉄系のものについても、Ag+、Cu2+について交換能を有している。
同様に、錫系、チタン系、アンチモン系のものは、陽イオン交換体である。
一方、ビスマス系のものは、陰イオンのCl-について交換能を有している。
また、ジルコニウム系のものは条件に製造条件によっては陰イオンの交換能を示す。アルミニウム系、錫系のものも同様である。
これら以外の無機イオン交換体としては、リン酸ジルコニウムに代表される多価金属の酸性塩、モリブドリン酸アンモニウムに代表されるヘテロポリ酸塩、不溶性フェロシアン化物等の合成物が知られている。
これらの無機イオン交換体の一部は既に市販されており、例えば、東亜合成株式会社の商品名イグゼ「IXE」における各種のグレードが知られている。
なお、合成品のほか、天然物のゼオライト、またはモンモリロン石のような無機イオン交換体の粉末も使用可能である。
有機イオン交換体には、陽イオン交換体としてスルホン酸基を有する架橋ポリスチレンが挙げられ、そのほかカルボン酸基、ホスホン酸基またはホスフィン酸基を有するものも挙げられる。
また、陰イオン交換体として四級アンモニウム基、四級ホスホニウム基または三級スルホニウム基を有する架橋ポリスチレンが挙げられる。
電子素子の製造工程では加熱するプロセスを含むため、無機イオン交換体が好ましい。
樹脂層は、無機充填剤を含有しているのが好ましい。
無機充填剤としては特に制限はなく、公知のものの中から適宜選択することができ、例えば、カオリン、硫酸バリウム、チタン酸バリウム、酸化ケイ素粉、微粉状酸化ケイ素、気相法シリカ、無定形シリカ、結晶性シリカ、溶融シリカ、球状シリカ、タルク、クレー、炭酸マグネシウム、炭酸カルシウム、酸化アルミニウム、水酸化アルミニウム、マイカ、窒化アルミニウム、酸化ジルコニウム、酸化イットリウム、炭化ケイ素、窒化ケイ素等が挙げられる。
無機充填剤の平均粒子径は、30nm~10μmであることが好ましく、80nm~1μmであることがより好ましい。
ここで、平均粒子径は、レーザー回折散乱式粒子径測定装置(日機装(株)製マイクロトラックMT3300)で測定される、一次粒子径を平均粒子径とする。
樹脂層は、硬化剤を含有していてもよい。
硬化剤を含有する場合、接続対象の半導体チップまたは半導体ウエハの表面形状との接合不良を抑制する観点から、常温で固体の硬化剤を用いず、常温で液体の硬化剤を含有しているのがより好ましい。
ここで、「常温で固体」とは、25℃で固体であることをいい、例えば、融点が25℃より高い温度である物質をいう。
異方導電性部材の導通路を保護する理由から、樹脂層の厚みは、導通路の突出部分の高さより大きく、1μm~5μmであることが好ましい。
透明絶縁体は、上述の〔樹脂層〕に挙げている材料から構成されるもののうち、可視光透過率が80%以上であるもので構成される。このため、各材料に関し、詳細な説明は省略する。
透明絶縁体において、主成分(高分子材料)が上述の〔樹脂層〕と同じである場合、透明絶縁体と樹脂層との間の密着性が良好となるため好ましい。
透明絶縁体は、電極等がない部分に形成するため、上述の〔樹脂層〕の<酸化防止材料>および上述の〔樹脂層〕の<マイグレーション防止材料>を含まないことが好ましい。
透明絶縁体はCTE(線膨張係数)がシリコン等の支持体に近い方が、異方導電材の反りが減るため、上述の〔樹脂層〕の<無機充填剤>を含むことが好ましい。
透明絶縁体において、高分子材料と硬化剤が、上述の〔樹脂層〕と同じである場合、温度および時間等の硬化条件が同じになるため好ましい。
なお、可視光透過率が80%以上とは、光透過率が波長400~800nmの可視光波長域において、80%以上のことをいう。光透過率は、JIS(日本工業規格) K 7375:2008に規定される「プラスチック--全光線透過率および全光線反射率の求め方」を用いて測定されるものである。
図45および図46に示す異方導電性部材15の製造方法は特に限定されないが、例えば、絶縁性基材に設けられた貫通路に導電材を存在させて導通路を形成する導通路形成工程と、本発明の被処理部材の製造方法を実施する工程とを有する。
さらに、導通路を突出させるトリミング工程と、トリミング工程の後に絶縁性基材の表面および導通路の突出部分に樹脂層を形成する樹脂層形成工程とを有する。
絶縁性基材は、金属酸化物を有するものであることが好ましい。絶縁性基材は、導通路の開口径、および突出部分のアスペクト比を上述の範囲とする観点から、バルブ金属に対して陽極酸化処理を施して形成した基板が好ましい。
陽極酸化処理としては、例えば、絶縁性基材がアルミニウムの陽極酸化物で構成される場合、アルミニウム基板を陽極酸化する陽極酸化処理、および陽極酸化処理の後に、陽極酸化により生じたマイクロポアによる孔を貫通化する貫通化処理をこの順に施すことにより作製することができる。
絶縁性基材の作製に用いられるアルミニウム基板ならびにアルミニウム基板に施す各処理工程については、特開2008-270158号公報の<0041>~<0121>段落に記載したものと同様のものを採用することができる。
なお、金属酸化物は、未酸化の金属以外の金属元素を含むものであることが好ましい。金属酸化物は、例えば、卑金属の酸化物であり、卑金属の酸化物は、例えば、アルミニウムの酸化物である。なお、未酸化の金属は上述のように、例えば、銅である。
導通路形成工程は、絶縁性基材に設けられた貫通路に導電性材料を存在させる工程である。
ここで、貫通路に金属を存在させる方法としては、例えば、特開2008-270158号公報の<0123>~<0126>段落および[図4]に記載された各方法(電解めっき法または無電解めっき法)と同様の方法が挙げられる。
また、電解めっき法または無電解めっき法においては、金、ニッケル、銅等による電極層を予め設けることが好ましい。この電極層の形成方法としては、例えば、スパッタ等の気相処理、無電解めっき等の液層処理、およびこれらを組合せた処理等が挙げられる。
金属充填工程により、導通路の突出部分が形成される前の異方導電性部材が得られる。
陽極酸化処理工程は、アルミニウム基板の片面に陽極酸化処理を施すことにより、アルミニウム基板の片面に、厚み方向に存在するマイクロポアとマイクロポアの底部に存在するバリア層とを有する陽極酸化膜を形成する工程である。
陽極酸化処理は、従来公知の方法を用いることができるが、マイクロポア配列の規則性を高くし、異方導電性を担保する観点から、自己規則化法または定電圧処理を用いるのが好ましい。
ここで、陽極酸化処理の自己規則化法または定電圧処理については、特開2008-270158号公報の<0056>~<0108>段落および[図3]に記載された各処理と同様の処理を施すことができる。
バリア層除去工程は、陽極酸化処理工程の後に、陽極酸化膜のバリア層を除去する工程である。バリア層を除去することにより、マイクロポアを介してアルミニウム基板の一部が露出することになる。
バリア層を除去する方法は特に限定されず、例えば、陽極酸化処理工程の陽極酸化処理における電位よりも低い電位でバリア層を電気化学的に溶解する方法(以下、「電解除去処理」ともいう。);エッチングによりバリア層を除去する方法(以下、「エッチング除去処理」ともいう。);これらを組み合わせた方法(特に、電解除去処理を施した後に、残存するバリア層をエッチング除去処理で除去する方法);等が挙げられる。
電解除去処理は、陽極酸化処理工程の陽極酸化処理における電位(電解電位)よりも低い電位で施す電解処理であれば特に限定されない。
電解溶解処理は、例えば、陽極酸化処理工程の終了時に電解電位を降下させることにより、陽極酸化処理と連続して施すことができる。
特に、上述したように電解除去処理と陽極酸化処理とを連続して施す場合は、同様の電解液を用いて処理するのが好ましい。
電解除去処理における電解電位は、陽極酸化処理における電解電位よりも低い電位に、連続的または段階的(ステップ状)に降下させるのが好ましい。
ここで、電解電位を段階的に降下させる際の下げ幅(ステップ幅)は、バリア層の耐電圧の観点から、10V以下であることが好ましく、5V以下であることがより好ましく、2V以下であることがさらに好ましい。
また、電解電位を連続的または段階的に降下させる際の電圧降下速度は、生産性等の観点から、いずれも1V/秒以下が好ましく、0.5V/秒以下がより好ましく、0.2V/秒以下がさらに好ましい。
エッチング除去処理は特に限定されないが、酸水溶液またはアルカリ水溶液を用いて溶解する化学的エッチング処理であってもよく、ドライエッチング処理であってもよい。
化学エッチング処理によるバリア層の除去は、例えば、陽極酸化処理工程後の構造物を酸水溶液またはアルカリ水溶液に浸漬させ、マイクロポアの内部に酸水溶液またはアルカリ水溶液を充填させた後に、陽極酸化膜のマイクロポアの開口部側の表面にpH(水素イオン指数)緩衝液に接触させる方法等であり、バリア層のみを選択的に溶解させることができる。
一方、アルカリ水溶液を用いる場合は、水酸化ナトリウム、水酸化カリウムおよび水酸化リチウムからなる群から選ばれる少なくとも一つのアルカリの水溶液を用いることが好ましい。また、アルカリ水溶液の濃度は0.1質量%~5質量%であることが好ましい。アルカリ水溶液の温度は、10℃~60℃が好ましく、さらに15℃~45℃が好ましく、さらに20℃~35℃であることが好ましい。なお、アルカリ水溶液には、亜鉛および他の金属を含有していてもよい。
具体的には、例えば、50g/L、40℃のリン酸水溶液、0.5g/L、30℃の水酸化ナトリウム水溶液、0.5g/L、30℃の水酸化カリウム水溶液等が好適に用いられる。
なお、pH緩衝液としては、上述した酸水溶液またはアルカリ水溶液に対応した緩衝液を適宜使用することができる。
ドライエッチング処理は、例えば、Cl2/Ar混合ガス等のガス種を用いることが好ましい。
金属充填工程は、バリア層除去工程の後に、電解めっき処理を施して陽極酸化膜におけるマイクロポアの内部に金属を充填する工程であり、例えば、特開2008-270158号公報の<0123>~<0126>段落および[図4]に記載された各方法と同様の方法(電解めっき法または無電解めっき法)が挙げられる。
なお、電解めっき法または無電解めっき法においては、上述したバリア層除去工程の後にマイクロポアを介して露出するアルミニウム基板を電極として利用することができる。
基板除去工程は、金属充填工程の後にアルミニウム基板を除去し、金属充填微細構造体を得る工程である。
アルミニウム基板を除去する方法としては、例えば、処理液を用いて、金属充填工程においてマイクロポアの内部に充填した金属および絶縁性基材としての陽極酸化膜を溶解せずに、アルミニウム基板のみを溶解させる方法等が挙げられる。
また、処理液の濃度としては、0.01mol/L~10mol/Lが好ましく、0.05mol/L~5mol/Lがより好ましい。
また、処理温度としては、-10℃~80℃が好ましく、0℃~60℃が好ましい。
トリミング工程は、導通路形成工程後の異方導電性部材表面の絶縁性基材のみを一部除去し、導通路を突出させる工程である。
なお、トリミング工程の前に、特定の形状に成形する工程を有していてもよい。この場合、例えば、トムソン刃を用いて特定の形状に成形される。
ここで、トリミング処理は、導通路を構成する金属を溶解しない条件であれば特に限定されず、例えば、酸水溶液を用いる場合は、硫酸、リン酸、硝酸、塩酸等の無機酸またはこれらの混合物の水溶液を用いることが好ましい。中でも、クロム酸を含有しない水溶液が安全性に優れる点で好ましい。酸水溶液の濃度は1質量%~10質量%であることが好ましい。酸水溶液の温度は、25℃~60℃であることが好ましい。
一方、アルカリ水溶液を用いる場合は、水酸化ナトリウム、水酸化カリウムおよび水酸化リチウムからなる群から選ばれる少なくとも一つのアルカリの水溶液を用いることが好ましい。アルカリ水溶液の濃度は0.1質量%~5質量%であることが好ましい。アルカリ水溶液の温度は、20℃~50℃であることが好ましい。
具体的には、例えば、50g/L、40℃のリン酸水溶液、0.5g/L、30℃の水酸化ナトリウム水溶液または0.5g/L、30℃の水酸化カリウム水溶液が好適に用いられる。
酸水溶液またはアルカリ水溶液への浸漬時間は、8分~120分であることが好ましく、10分~90分であることがより好ましく、15分~60分であることがさらに好ましい。ここで、浸漬時間は、短時間の浸漬処理(トリミング処理)を繰り返した場合には、各浸漬時間の合計をいう。なお、各浸漬処理の間には、洗浄処理を施してもよい。
ここで、同一平面状に加工する方法としては、例えば、物理的研磨(例えば、遊離砥粒研磨、バックグラインド、サーフェスプレーナー等)、電気化学的研磨、これらを組み合わせた研磨等が挙げられる。
加熱処理は、金属の酸化を抑制する観点から還元性雰囲気で施すことが好ましく、具体的には、酸素濃度が20Pa以下で行うことが好ましく、真空下で行うことがより好ましい。ここで、真空とは、大気よりも気体密度または気圧の低い空間の状態をいう。
また、加熱処理は、矯正の目的で、材料を加圧しながら行うことが好ましい。
樹脂層形成工程は、トリミング工程後に絶縁性基材の表面および導通路の突出部分に樹脂層を形成する工程である。
ここで、樹脂層を形成する方法としては、例えば、上述した酸化防止材料、高分子材料、溶媒(例えば、メチルエチルケトン等)等を含有する樹脂組成物を絶縁性基材の表面および導通路の突出部分に塗布し、乾燥させ、必要に応じて焼成する方法等が挙げられる。
樹脂組成物の塗布方法は特に限定されず、例えば、グラビアコート法、リバースコート法、ダイコート法、ブレードコーター、ロールコーター、エアナイフコーター、スクリーンコーター、バーコーター、カーテンコーター、スピンコーター等、従来公知のコーティング方法が使用できる。
また、塗布後の乾燥方法は特に限定されず、例えば、大気下において0℃~100℃の温度で、数秒~数十分間、加熱する処理、減圧下において0℃~80℃の温度で、十数分~数時間、加熱する処理等が挙げられる。
また、乾燥後の焼成方法は、使用する高分子材料により異なるため特に限定されないが、ポリイミド樹脂を用いる場合には、例えば、160℃~240℃の温度で2分間~60分間加熱する処理等が挙げられ、エポキシ樹脂を用いる場合には、例えば、30℃~80℃の温度で2分間~60分間加熱する処理等が挙げられる。
本実施例では、以下に示す実施例1~実施例20および比較例1の被処理部材の製造方法により、被処理部材を処理した。本実施例では、実施例1~実施例20および比較例1の被処理部材の製造方法における欠陥の発生および処理後の導電性を評価した。欠陥の発生および導電性の結果を下記表1~表4に示す。なお、下記表1~表4において、「-」はないことを示す。
また、実施例1~実施例20および比較例1の被処理部材の製造方法に用いた各部材を下記表1~表4に示す。なお、下記表1~表4に示す接着力は、剥離角度180°、引張速度300mm/分の条件にて測定した値である。
[欠陥の発生]
本発明に関わる工程の直前工程(後述の<円形加工工程>)の後から、2回目の研磨処理工程に至るまでに、被処理部材において発生した30μm以上のクラック等の欠陥の数で評価した。
欠陥は、以下に示すようにして測定した。
後に詳細に説明する被処理部材は赤外線を透過しないため、赤外線を用いると被処理部材のクラックを明確に検出できる。
赤外線顕微鏡を用いて被処理部材の平面視全域の検査画像を取得し、取得した検査画像に対して二値化処理を施し、検査画像の二値化画像を得た。二値化画像の黒色部の長さを測長した。黒色部のなかから、30μmを閾値として欠陥を抽出した。
なお、赤外線顕微鏡に、オリンパス株式会社製 半導体/FPD検査顕微鏡MX61(商品名)を使用した。レンズには、オリンパス株式会社製 近赤外領域(700nm~1300nm)観察用の対物レンズLMRLN5XIR(商品名)を用いた。また、ステージには、メルツホイザー社製 正立顕微鏡用自動XYステージを使用した。
欠陥の発生は、N個/100cm2で表され、以下の評価基準にて評価した。
A:N<5
B:5≦N<20
C:20≦N<100
D:100≦N
2回目の研磨処理工程が終了した後の処理部材の表面と裏面に、金属接続部を介して、日置電機株式会社のRM3542を使用し、4端子法にて、2回目の研磨処理工程が終了した後の処理部材の厚み方向の抵抗率を算出した。導電性は、上述の抵抗率を用いて、以下の評価基準にて評価した。
A:安定して抵抗率が1×10-4Ω・m未満であるもの
B:安定して抵抗率が1×10-4Ω・m以上であるもの
C:抵抗率がばらついたり、安定した抵抗率を示さないもの
D:通電しないもの
<実施例1>
実施例1では、まず、直径200mm、厚さ1mmの円盤状の石英ガラス基板に自己剥離テープ(第1の接着剤、積水化学工業株式会社製セルファ)を貼り付けた。この上に、被処理部材を貼り合わせた。このとき、被処理部材の貼り合せには、真空貼り合せ装置(アユミ工業株式会社製を改造したもの)を使用した。その後、被処理部材の第1面を化学的機械的研磨で処理した。
一方、直径200mm、厚さ0.775mmの円盤状のシリコン(Si)基板に、熱剥離シート(第2の接着剤、日東電工株式会社製リバアルファ)を、マウンターにて貼り付けた後、化学的機械的研磨で処理をした被処理部材を、上述の真空貼り合せ装置で貼り合せた。この後、石英ガラス基板側から、紫外線照射(照射量3000mJ/cm2)して、自己剥離テープの接着力を低減させて被処理部材を剥離させ、露出した未処理面(第2面)を化学的機械的研磨で処理した。被処理部材については、後に説明する。なお、紫外線照射のことを下記表1~表4では、UV照射と記した。また、第1の接着剤が第1の接着層を構成し、第2の接着剤が第2の接着層を構成する。
上述の化学的機械的研磨の処理は、株式会社フジミインコーポレイテッド社製のPNANERLITE-7000のCMP(chemical mechanical polishing)スラリーを用い、4時間実施した。被処理部材の化学的機械的研磨の後の厚さは40μmであり、第1面および第2面の表面粗さは算術平均粗さで0.1μmであった。
実施例2では、まず、実施例1と同様に、石英ガラス基板に自己剥離テープ(第1の接着剤)を貼り付け被処理部材を貼り合せた後、第1面を化学的機械的研磨で処理した。
石英ガラス基板よりも十分大きな穴を持つ、厚さ1mmのステンレス鋼板で形成されたドーナツ状の枠体を準備し、枠体に上述の熱剥離シート(第2の接着剤)を貼り付けた。熱剥離シートを研磨処理した被処理部材に、マウンターを使用して貼り付けた後、石英ガラス基板側から紫外線照射(照射量3000mJ/cm2)して、自己剥離テープの接着力を低減させて被処理部材を剥離した。次に、枠体全体を反転させた後、上述のシリコン基板に、マウンターを使用して貼り付け、熱剥離シートをシリコン基板の大きさにカッターにて円形にカットした。この後、露出した未処理面を化学的機械的研磨で処理した。
化学的機械的研磨は、上述の<実施例1>に説明したとおりである。
実施例3では、まず、実施例1と同様に、石英ガラス基板に自己剥離テープ(第1の接着剤)を貼り付け、被処理部材を貼り合せた後、第1面を化学的機械的研磨で処理した。
石英ガラス基板よりも十分大きな穴を持つ、厚さ1mmのステンレス鋼板で形成されたドーナツ状の枠体を準備し、枠体に、中間仮着対象1(日東電工株式会社製SPV-200)を貼り付けた。中間仮着対象1を化学的機械的研磨で処理した被処理部材の第1面に、マウンターを使用して貼り付けた後、紫外線照射して、自己剥離テープの接着力を低減させて被処理部材を剥離した。さらに、枠体の裏側に中間仮着対象2(日東電工株式会社製リバアルファ)を、被処理部材の未処理面に貼り付けた。中間仮着対象2を未処理面に貼り付けることにより、中間仮着対象1と中間仮着対象2との接着力の差を利用して、中間仮着対象1および中間仮着対象2のうち、中間仮着対象1を剥離した。
一方、上述のシリコン基板に、上述の熱剥離シート(第2の接着剤)をマウンターにて貼り付けた。その後、枠体の中間仮着対象2に貼り付けられた状態の被処理部材の第1面に、熱剥離シートを介してシリコン基板をマウンターにより貼り付けた。さらに、石英ガラス基板側から紫外線照射(照射量3000mJ/cm2)して、中間仮着対象2を剥離した後、露出した未処理面を化学的機械的研磨で処理した。
化学的機械的研磨は、上述の<実施例1>に説明したとおりである。
実施例4では、まず、実施例1と同様に、石英ガラス基板に自己剥離テープ(第1の接着剤)を貼り付け、被処理部材を貼り合せた後、第1面を化学的機械的研磨で処理した。
真空貼り合せ装置内で、多孔質の第1の吸着板を、被処理部材の研磨面に接触させ吸着した後、紫外線照射して、自己剥離テープの接着力を低減させて被処理部材を剥離した。次に、第2の吸着板によって、被処理部材の未処置面を吸着させた後、第1の吸着板の吸着を外して、被処理部材から切り離した。
一方、上述のシリコン基板に、上述の熱剥離シート(第2の接着剤)をマウンターにて貼り付けた後、上述の真空貼り合せ装置内にて、第2の吸着板に吸着された被処理部材を、シリコン基板に、真空貼り合せ装置内で貼り合せた。そして、第2の吸着板の吸着を外して、被処理部材から切り離した。その後、露出した未処理面を化学的機械的研磨で処理した。
化学的機械的研磨は、上述の<実施例1>に説明したとおりである。
実施例5は、実施例1に比して、自己剥離テープ(第1の接着剤)にリンテック株式会社製SRL0759(品名)(両面微粘着シート)を用い、紫外線照射することなく、被処理部材を剥離させた点以外は実施例1と同じである。
<実施例6>
実施例6は、実施例1に比して、自己剥離テープ(第1の接着剤)に、ソマール株式会社製ソマタック(登録商標)PS-1151CR(製品品番)を用いた点以外は実施例1と同じである。実施例6に用いた自己剥離テープ(ソマール株式会社製ソマタック(登録商標)PS-1151CR(製品品番))は、温度60℃に加熱し続け、加熱を止めると接着力が低下する。このため、下記表2の「第1の支持体」の「接着層変質条件」の欄に「冷却(60℃→20℃)」と記した。
実施例7は、実施例1に比して、熱剥離シート(第2の接着剤)にリンテック株式会社製SRL0759(品名)(両面微粘着シート)を用いた点以外は実施例1と同じである。
<実施例8>
実施例8は、実施例1に比して、熱剥離シート(第2の接着剤)にソマール株式会社製ソマタック(登録商標)PS-1151CR(製品品番)を用いた点以外は実施例1と同じである。実施例8の熱剥離シートは、上述のように温度60℃に加熱し続け、加熱を止めると接着力が低下する。このため、下記表2の「第2の支持体」の「接着層変質条件」の欄に「冷却(60℃→20℃)」と記した。
実施例9は、実施例1に比して、被処理部材のマイクロポアに何も充填されていない点以外は実施例1と同じである。
<実施例10>
実施例10は、実施例1に比して、被処理部材のマイクロポアに銅に代えてITO(Indium Tin Oxide)が充填されている点以外は実施例1と同じである。なお、被処理部材のマイクロポアへのITO(Indium Tin Oxide)の充填には蒸着を用いた。また、下記表2で「導電体種」の欄に「ITO」と記した。
<実施例11>
実施例11は、実施例1に比して、被処理部材のマイクロポアに銅に代えてアルミニウムが充填されている点以外は実施例1と同じである。なお、被処理部材のマイクロポアへのアルミニウムの充填には蒸着を用いた。
<実施例12>
実施例12は、実施例1に比して、被処理部材のマイクロポアに銅に代えてマグネシウムが充填されている点以外は実施例1と同じである。なお、被処理部材のマイクロポアへのマグネシウムの充填には蒸着を用いた。
実施例13は、実施例1に比して、被処理部材の化学的機械的研磨の後の第1面および第2面の表面粗さが、算術平均粗さで0.5μmである点以外は実施例1と同じである。<実施例14>
実施例14は、実施例1に比して、直径200mm、厚さ1mmの石英ガラス基板に代えて、直径200mm、厚さ0.775mmのシリコン基板を用い、自己剥離テープ(第1の接着剤)に、ソマール株式会社製ソマタック(登録商標)PS-1151CR(製品品番)を用いた点、および直径200mm、厚さ0.775mmの円盤状のシリコン(Si)基板に代えて、直径200mm、厚さ1mmの石英ガラス基板を用い、熱剥離シート(第2の接着剤)として自己剥離テープ(積水化学工業株式会社製セルファ)を用いた点以外は実施例1と同じである。
<実施例15>
実施例15は、実施例1に比して、被処理部材の化学的機械的研磨の後の厚さを80μmとした点以外は実施例1と同じである。
実施例16は、実施例1に比して、自己剥離テープ(第1の接着剤)の接着力の低減にレーザー照射を用いた点以外は実施例1と同じである。レーザー照射には、キーエンス株式会社製MD-X1500(型式)を用いた。レーザー照射は、波長380nm、出力5W、スキャン速度3m/秒、送り巾50μmで実施した。
<実施例17>
実施例17は、実施例1に比して、直径200mm、厚さ0.775mmの円盤状のシリコン(Si)基板に代えて、直径200mm、厚さ1mmの円盤状の石英ガラス基板を用いた点、石英ガラス基板に熱剥離シート(第2の接着剤)として自己剥離テープ(積水化学工業株式会社製セルファ)を貼り付けた点以外は実施例1と同じである。
<実施例18>
実施例18は、実施例1に比して、マイクロポア孔径が100nmであり、マイクロポア密度が500万個/cm2である点以外は実施例1と同じである。実施例18は、後述の<陽極酸化処理工程>において、電圧を変化させた以外は実施例1と同様に作製した。
実施例19は、実施例1に比して、被処理部材の化学的機械的研磨に代えて、機械研磨を実施した点以外は実施例1と同じである。機械研磨は、CMPスラリーをダイヤモンド研磨剤に変更した以外は、上述の化学的機械的研磨の処理と同じである。被処理部材の化学的機械的研磨の後の第1面および第2面の表面粗さが、算術平均粗さで1μm以上であった。
<実施例20>
実施例19は、実施例1に比して、石英ガラス基板の厚みを2mmとし、シリコン基板の厚みを1.5mmとした点以外は実施例1と同じである。
比較例1は、実施例1に比して、実施例1の被処理部材を熱剥離シートに貼付する工程と、被処理部材を自己剥離テープから剥離する工程の順序を入れ替えた点以外は実施例1と同じである。
被処理部材である酸化アルミニウム材は、以下に示す工程により作製されたものである。
<電解研磨処理工程>
基板に、高純度のアルミニウム基板(住友軽金属社製(株式会社UACJ社製)、純度99.99質量%、0.2mm厚)を用いた。アルミニウム基板を直径220mmの面積で陽極酸化処理できるようカットし、以下に示す組成の電解研磨液を用い、電圧25V、液温度65℃、液流速3.0m/分の条件で電解研磨処理をした。陰極はカーボン電極とし、電源は、GP0110-30R(株式会社高砂製作所社製)を用いた。また、電解液の流速はアズワン株式会社製渦式フローモニターFLM22-10PCWを用いて計測した。
(電解研磨液組成)
・85質量%リン酸(和光純薬工業株式会社製試薬) 660mL(ミリリットル)
・純水 160mL
・硫酸 150mL
・エチレングリコール 30mL
次いで、電解研磨処理後のアルミニウム基板に、0.30mol/L(リットル)硫酸の電解液で、電圧25V、液温度15℃、液流速3.0m/分の条件で、5時間のプレ陽極酸化処理を施した。その後、プレ陽極酸化処理後のアルミニウム基板を、0.2mol/L無水クロム酸、0.6mol/Lリン酸の混合水溶液(液温:50℃)に12時間浸漬させる脱膜処理を施した。その後、0.30mol/L硫酸の電解液で、電圧25V、液温度15℃、液流速3.0m/分の条件で、1時間の再陽極酸化処理を施した。なお、プレ陽極酸化処理及び再陽極酸化処理は、いずれも陰極はステンレス電極とし、電源はGP0110-30R(株式会社高砂製作所社製)を用いた。また、冷却装置にはNeoCool BD36(ヤマト科学株式会社製)、撹拌加温装置にはペアスターラー PS-100(EYELA東京理化器械株式会社製)を用いた。更に、電解液の流速は、アズワン株式会社製渦式フローモニターFLM22-10PCWを用いて計測した。
次いで、20質量%塩化水銀水溶液(昇汞)に20℃、3時間浸漬させることによりアルミニウム基板を溶解し、更に、5質量%リン酸に温度30℃、30分間浸漬させることにより陽極酸化皮膜の底部を除去し、マイクロポアからなる貫通孔を有する陽極酸化皮膜からなる構造体(絶縁性基材)を作製した。なお、マイクロポア孔径が70nmであり、マイクロポア密度が1000万個/cm2であった。
次いで、上述の貫通化処理後の構造体の一方の表面に銅電極を密着させ、銅電極を陰極にし、白金を正極にして電解めっきを行なった。硫酸銅/硫酸/塩酸=200/50/15(g/L)の混合溶液を温度25℃に保った状態で電解液として使用し、定電圧パルス電解を実施することにより、貫通孔に銅が充填された構造体(異方導電性部材前駆体)を製造した。ここで、定電圧パルス電解は、株式会社 山本鍍金試験器社製のめっき装置を用い、北斗電工株式会社製の電源(HZ-3000)を用い、めっき液中でサイクリックボルタンメトリを行なって析出電位を確認した後、皮膜側の電位を-2Vに設定して行った。また、定電圧パルス電解のパルス波形は矩形波であった。具体的には、電解の総処理時間が300秒になるように、1回の電解時間が60秒の電解処理を、各電解処理の間に40秒の休止時間を設けて5回施した。
金属充填処理した部材を水洗し、乾燥した後、富士商工マシナリー株式会社製UDP-3000を使用して、トムソン刃にて、直径199mmの円形に打抜いた。
実施例5、6は、実施例1とは第1の接着剤が異なり、実施例1に比して欠陥の数がわずかに多かった。
実施例7、8は、実施例1とは第2の接着剤が異なり、実施例1に比して欠陥の数が多かった。
実施例9は、実施例1とは導電体種がない点で異なり、実施例1に比して欠陥の数がわずかに多く、かつ導電性が劣った。
実施例10~12は、実施例1とは導電体種が異なり、実施例1に比して欠陥の数がわずかに多く、かつ導電性がわずかに劣った。
実施例13および実施例19は、実施例1よりも算術平均粗さが粗く、実施例1に比して導電性がわずかに劣った。
10a、12a、16a、40a、104a 表面
12 第1の接着層
14,104 基板
14a 第1面
14b 第2面
15 異方導電性部材
16、106 第2の支持体
17 積層体
18 第2の接着層
20、21 仮支持体
22 枠体
22a 開口部
24 接着シート
25 カッター
26 接着シート
28 異方導電材
30 第1の転写支持体
32 第2の転写支持体
40 絶縁性基材
40b、104b 裏面
41 貫通路
42 導通路
42a、42b 突出部分
43 基部
44 樹脂層
46 支持基体
47 剥離層
48 支持層
49 剥離剤
50 部位
102 第1の仮接着層
108 第2の仮接着層
Dt 距離
Z 厚み方向
h 厚み
p 中心間距離
x 方向
Claims (26)
- 金属酸化物を含有する被処理部材と第1の支持体とを第1の接着層を用いて接合する第1接合工程と、
前記被処理部材を加工して第1加工面を形成する第1面加工工程と、
接着性を有する支持体、前記被処理部材を吸着する吸着支持体、および第2の接着層のうち、1つと、前記第1加工面とを接触させる第1面接触工程と、
前記被処理部材と第2の支持体とを前記第1加工面と接する前記第2の接着層を用いて接合する第2接合工程と、
前記被処理部材を加工して前記第1加工面の裏面に第2加工面を形成する第2面加工工程とを、この順番で含み、
前記第1面接触工程において、前記接着性を有する支持体または前記吸着支持体と、前記第1加工面とを接触させた場合、前記接着性を有する支持体または前記吸着支持体を除去する工程を含み、
前記第1面接触工程と前記第2接合工程との間、または前記第2接合工程と前記第2面加工工程との間に、前記被処理部材から前記第1の接着層を除去する第1の接着層除去工程を含む、被処理部材の製造方法。 - 前記第1面接触工程は、前記接着性を有する支持体または前記吸着支持体を用いて、前記第1加工面を支持する工程を含み、
前記第1加工面が支持された状態で、前記第1の接着層が除去される請求項1に記載の被処理部材の製造方法。 - 前記第1面加工工程と前記第1の接着層除去工程との間に、前記第1の接着層の接着力を低減させる第1の接着層変質工程を含む、請求項1または2に記載の被処理部材の製造方法。
- 前記第1の接着層変質工程が露光および加熱のうち少なくとも一方を含む、請求項3に記載の被処理部材の製造方法。
- 前記第2面加工工程の後に、前記第2の接着層の接着力を低減させる第2の接着層変質工程を含む、請求項1~4のいずれか1項に記載の被処理部材の製造方法。
- 前記第2の接着層変質工程が露光および加熱のうち少なくとも一方を含む、請求項5に記載の被処理部材の製造方法。
- 前記第2接合工程と前記第2面加工工程との間に前記第1の接着層除去工程を含む、請求項1~6のいずれか1項に記載の被処理部材の製造方法。
- 前記第1面加工工程と前記第2接合工程との間に、
前記被処理部材の前記第1加工面を第1の転写支持体に転写する第1転写工程と、
前記第1の接着層除去工程と、
前記第1の転写支持体による前記第1加工面の転写した状態を解除し、前記被処理部材の前記第1加工面以外の部分を第2の転写支持体に転写する第2転写工程と、をこの順に含む、請求項1~7のいずれか1項に記載の被処理部材の製造方法。 - 前記第1の転写支持体および前記第2の転写支持体のうち少なくとも一方が、接着性を有する仮支持体である、請求項8に記載の被処理部材の製造方法。
- 前記第1の転写支持体および前記第2の転写支持体のうち少なくとも一方が、前記被処理部材を吸着する吸着支持体である、請求項8または9に記載の被処理部材の製造方法。
- 前記第2接合工程が、前記被処理部材の前記第1加工面に設けられた前記第2の接着層に前記第2の支持体を貼付する工程である、請求項1~10のいずれか1項に記載の被処理部材の製造方法。
- 前記第2接合工程が、前記第2の支持体に設けられた前記第2の接着層に前記被処理部材を貼付する工程である、請求項1~11のいずれか1項に記載の被処理部材の製造方法。
- 前記第1接合工程が、前記第1の支持体に設けられた前記第1の接着層に前記被処理部材を貼付する工程である、請求項1~12のいずれか1項に記載の被処理部材の製造方法。
- 前記被処理部材が導電体を含む、請求項1~13のいずれか1項に記載の被処理部材の製造方法。
- 前記導電体が未酸化の金属を含む、請求項14に記載の被処理部材の製造方法。
- 前記金属酸化物が前記未酸化の金属以外の金属元素を含む、請求項15に記載の被処理部材の製造方法。
- 前記未酸化の金属が遷移金属である、請求項15または16に記載の被処理部材の製造方法。
- 前記金属酸化物が卑金属の酸化物である、請求項1~17のいずれか1項に記載の被処理部材の製造方法。
- 前記第1加工面および前記第2加工面が、ともに算術平均粗さが1μm以下の面である、請求項1~18のいずれか1項に記載の被処理部材の製造方法。
- 前記第2面加工工程が、前記被処理部材の面のうち前記第1の接着層と接していた面を加工する工程である、請求項1~19のいずれか1項に記載の被処理部材の製造方法。
- 前記第1の接着層の接着力が前記第2の接着層の接着力よりも常に小さい、請求項1~20のいずれか1項に記載の被処理部材の製造方法。
- 前記第1の支持体および前記第2の支持体のうち少なくとも一方が、透過領域を少なくとも1ヶ所有し、前記透過領域は、透過率が200~500nmの波長範囲において70%以上である、請求項1~21のいずれか1項に記載の被処理部材の製造方法。
- 前記被処理部材における前記第1加工面と前記第2加工面の間の距離が50μm以下である、請求項1~22のいずれか1項に記載の被処理部材の製造方法。
- 前記露光がレーザー照射または紫外線照射である、請求項4または6に記載の被処理部材の製造方法。
- 前記第1の接着層および前記第2の接着層のうち少なくとも一方が、加熱により接着層の接着性を低減させる材料を含む、請求項1~24のいずれか1項に記載の被処理部材の製造方法。
- 前記第1の支持体、前記第1の接着層および前記被処理部材をこの順に有する、請求項1~25のいずれか1項に記載の被処理部材の製造方法に用いられる積層体。
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TWI425066B (zh) * | 2010-09-09 | 2014-02-01 | Hitachi Chemical Co Ltd | Preparation method of adhesive composition, circuit board for connecting circuit member, and manufacturing method of semiconductor device |
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2018
- 2018-04-27 WO PCT/JP2018/017195 patent/WO2018216433A1/ja active Application Filing
- 2018-04-27 KR KR1020197029502A patent/KR102281480B1/ko active IP Right Grant
- 2018-04-27 JP JP2019519536A patent/JP6991206B2/ja active Active
- 2018-05-04 TW TW107115307A patent/TWI754053B/zh active
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2019
- 2019-09-20 US US16/577,002 patent/US20200009845A1/en not_active Abandoned
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JPH04210361A (ja) * | 1990-12-14 | 1992-07-31 | Seiko Electronic Components Ltd | ウエハの両面加工方法 |
JP2003206451A (ja) * | 2002-01-15 | 2003-07-22 | Nitto Denko Corp | 熱剥離型粘着シートを用いた易損傷性被加工物の両面加工方法 |
JP2008251781A (ja) * | 2007-03-30 | 2008-10-16 | Oki Electric Ind Co Ltd | 半導体装置の製造方法 |
JP2015098565A (ja) * | 2013-11-20 | 2015-05-28 | 東京応化工業株式会社 | 処理方法 |
JP2015201548A (ja) * | 2014-04-08 | 2015-11-12 | 株式会社ソシオネクスト | 半導体装置の製造方法 |
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KR20190126852A (ko) | 2019-11-12 |
JP6991206B2 (ja) | 2022-01-12 |
US20200009845A1 (en) | 2020-01-09 |
TWI754053B (zh) | 2022-02-01 |
JPWO2018216433A1 (ja) | 2020-04-09 |
KR102281480B1 (ko) | 2021-07-26 |
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