WO2001071805A1 - Semiconductor device, method of manufacture thereof, circuit board, and electronic device - Google Patents
Semiconductor device, method of manufacture thereof, circuit board, and electronic device Download PDFInfo
- Publication number
- WO2001071805A1 WO2001071805A1 PCT/JP2001/002325 JP0102325W WO0171805A1 WO 2001071805 A1 WO2001071805 A1 WO 2001071805A1 JP 0102325 W JP0102325 W JP 0102325W WO 0171805 A1 WO0171805 A1 WO 0171805A1
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- Prior art keywords
- resin layer
- semiconductor device
- manufacturing
- wiring
- external terminal
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 246
- 238000004519 manufacturing process Methods 0.000 title claims description 72
- 238000000034 method Methods 0.000 title claims description 54
- 239000011347 resin Substances 0.000 claims abstract description 285
- 229920005989 resin Polymers 0.000 claims abstract description 285
- 239000000463 material Substances 0.000 claims description 39
- 238000007639 printing Methods 0.000 claims description 4
- 238000000059 patterning Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 327
- 230000004048 modification Effects 0.000 description 23
- 238000012986 modification Methods 0.000 description 23
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- 238000010586 diagram Methods 0.000 description 16
- 238000002161 passivation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 230000008646 thermal stress Effects 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000007687 exposure technique Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- HBVFXTAPOLSOPB-UHFFFAOYSA-N nickel vanadium Chemical compound [V].[Ni] HBVFXTAPOLSOPB-UHFFFAOYSA-N 0.000 description 2
- 229920002577 polybenzoxazole Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000002507 cathodic stripping potentiometry Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H01L21/04—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
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/56—Encapsulations, e.g. encapsulation layers, coatings
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- H01L23/31—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape
- H01L23/3107—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed
- H01L23/3114—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the arrangement or shape the device being completely enclosed the device being a chip scale package, e.g. CSP
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- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
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Definitions
- the present invention relates to a semiconductor device and a method for manufacturing the same, a circuit board, and an electronic device.
- wafer-level CSPs which are manufactured at wafer-level, have attracted attention.
- the first level CSP a plurality of semiconductor elements having a resin layer and subjected to rewiring are formed in wafer units, and then cut into individual semiconductor elements to form a semiconductor device.
- the edge of the diced semiconductor device is chipped, which may cause the resin layer to peel off from the interface of the semiconductor element.
- the present invention has solved this problem, and an object of the present invention is to provide a highly reliable semiconductor device, a method for manufacturing the same, a circuit board, and an electronic device.
- a method of manufacturing a semiconductor device includes the steps of: providing a plurality of resin layers; a plurality of resin layers; a wiring electrically connected to the electrode of each semiconductor element; Forming an external terminal to be electrically connected to the semiconductor device, and cutting the assembly.
- At least one resin layer of the plurality of resin layers is formed so as to avoid a cut region of the assembly.
- At least one resin layer is formed in advance so as to avoid the cutting region of the aggregate, Cut the aggregate. Accordingly, chipping of the end of the semiconductor device can be suppressed, and peeling of the resin layer of the semiconductor device can be prevented. Therefore, a highly reliable semiconductor device can be manufactured.
- the at least one resin layer may be formed by an ink jet method or a printing method.
- the at least one resin layer may be formed in a separate member by patterning in advance, and then transferred to the aggregate.
- the cut region may be formed by providing a material made of a component that repels the at least one resin layer, and repelling the at least one resin layer with the material.
- the at least one resin layer is made of a photosensitive material
- the at least one resin layer may be formed by exposing to remove the portion of the cut region.
- At least one resin layer can be easily formed in an existing process.
- the plurality of resin layers include: a first resin layer below the wiring, and a second resin layer above the wiring,
- At least the first resin layer may be formed avoiding a cut region of the assembly.
- the first resin layer formed below the wiring is formed avoiding the cutting region. For example, it is effective when the first resin layer is formed relatively thick.
- the second resin layer may be formed avoiding a cutting region of the assembly.
- At least the uppermost layer of the second resin layer is provided so as to cover the external terminal and the cutting region, and then a part is removed to form at least a tip of the external terminal.
- the portion of the cutting region may be removed at the same time as exposing the portion.
- the second resin layer can be removed from the cutting region by the existing number of steps.
- the second resin layer may be formed of a plurality of layers, and at least an uppermost layer of the plurality of layers may be formed so as to cover a cut region of the assembly. According to this, the occurrence of chipping at the end of the semiconductor element at the time of cutting can be suppressed, its progress can be suppressed, and peeling of the resin layer can be effectively prevented.
- the plurality of resin layers include: a first resin layer below the wiring, and a second resin layer above the wiring,
- At least the second resin layer may be formed so as to avoid a cut region of the assembly.
- the second resin layer formed on the wiring is formed avoiding the cutting region.
- it is effective when the second resin layer is formed relatively thick.
- the thermal expansion coefficient of the second resin layer may be larger than that of the first resin layer. Thereby, stress due to thermal stress can be effectively reduced.
- the second resin layer may be formed by exposing a part of the external terminal so that the external terminal is smaller in a plan view than a joint portion of the external terminal with the wiring.
- the stress can be further effectively reduced by increasing the contact area of the second resin layer with the external terminal.
- the external terminal may be formed on a portion of the wiring exposed from the second resin layer.
- the external terminals can be provided more easily.
- a plurality of the electrodes are formed on each of the semiconductor elements,
- the first resin layer may be formed in a region of the semiconductor element inside the electrode.
- the first resin layer can be provided so as to avoid the cutting region. Also, by reducing the area of the first resin layer, even when the coefficient of thermal expansion between the semiconductor element and the first resin layer is somewhat different, the stress applied to the external terminals can be effectively reduced. Can be.
- a semiconductor device according to the present invention is manufactured by the above-described method for manufacturing a semiconductor device.
- a semiconductor device includes: a semiconductor chip having electrodes;
- a plurality of resin layers provided on the surface of the semiconductor chip on which the electrodes are formed,
- At least one resin layer of the plurality of resin layers has an outer periphery of a planar shape positioned inside an outer periphery of the semiconductor chip.
- the outer periphery of the planar shape of at least one resin layer is located inside the outer periphery of the cut semiconductor element. That is, at least one resin layer of the plurality of resin layers is formed avoiding the end of the semiconductor element. This can prevent peeling of the resin layer from the cut surface.
- the at least one resin layer may be formed below the wiring.
- the semiconductor chip has a plurality of the electrodes
- the at least one resin layer may be formed in a region inside the electrode in the semiconductor chip in plan view.
- the plurality of resin layers include a resin layer provided so as to cover a periphery of a root of the external terminal on the wiring,
- a part of the external terminal may be exposed such that a portion of the external terminal exposed from the resin layer is smaller in plan view than a joint of the external terminal with the wiring.
- the stress can be more effectively reduced by increasing the contact area of the resin layer with the external terminal.
- a circuit board according to the present invention has the semiconductor device mounted thereon.
- An electronic apparatus includes the above-described semiconductor device.
- FIG. 1 is a diagram illustrating a semiconductor device according to a first embodiment of the present invention.
- FIG. 2 is a diagram for explaining the method for manufacturing the semiconductor device according to the first embodiment of the present invention.
- FIG. 3 is a view for explaining a method for manufacturing a semiconductor device according to the first embodiment of the present invention.
- FIG. 4 is a diagram for explaining the method for manufacturing the semiconductor device according to the first embodiment of the present invention.
- FIG. 5 is a diagram for explaining the method for manufacturing the semiconductor device according to the first embodiment of the present invention.
- FIG. 6 is a diagram for explaining the method for manufacturing the semiconductor device according to the first embodiment of the present invention.
- FIG. 7 is a diagram for explaining the method for manufacturing the semiconductor device according to the first embodiment of the present invention.
- FIG. 8 is a diagram for explaining the method for manufacturing the semiconductor device according to the first embodiment of the present invention.
- FIG. 9 is a view for explaining a first modification of the method for manufacturing a semiconductor device according to the first embodiment of the present invention.
- FIG. 10 is a view for explaining a second modification of the method for manufacturing a semiconductor device according to the first embodiment of the present invention.
- FIG. 11 is a view for explaining a third modification of the method for manufacturing a semiconductor device according to the first embodiment of the present invention.
- FIG. 12 is a view for explaining a fourth modification of the semiconductor device and the method of manufacturing the same according to the first embodiment of the present invention.
- FIG. 13 is a view for explaining a semiconductor device and a method of manufacturing the same according to the second embodiment of the present invention.
- FIG. 14 is a diagram for explaining a semiconductor device according to the second embodiment of the present invention.
- FIG. 15 is a diagram illustrating a semiconductor device and a method of manufacturing the same according to a modification of the second embodiment of the present invention.
- FIG. 16 is a view illustrating a semiconductor device and a method of manufacturing the semiconductor device according to the third embodiment of the present invention.
- FIG. 17 is a view for explaining a semiconductor device according to the third embodiment of the present invention.
- FIG. 18 shows a semiconductor device and a method of manufacturing the same according to a modification of the third embodiment of the present invention.
- FIG. 19 is a diagram showing a circuit board on which the semiconductor device according to the present embodiment is mounted.
- FIG. 20 is a diagram illustrating an electronic device including the semiconductor device according to the present embodiment.
- FIG. 21 is a diagram illustrating an electronic apparatus including the semiconductor device according to the present embodiment.
- FIG. 1 is a diagram for explaining the semiconductor device according to the first embodiment.
- 2 to 12 are views for explaining the method for manufacturing the semiconductor device according to the present embodiment.
- FIG. 1 is a view specifically showing an aggregate of a semiconductor device including an aggregate 10 before being cut into individual semiconductor elements 12.
- the semiconductor device according to the present embodiment is obtained by cutting the semiconductor device shown in FIG.
- the semiconductor device 1 includes individual semiconductor elements (semiconductor chips) 12, wirings 20, external terminals 30, and a plurality of resin layers (the first resin layer 40 and the second resin layer 1 in FIG. 1). 0 0) and. Then, at least one of the plurality of resin layers (all the resin layers in FIG. 1) is formed so as to avoid the end of the semiconductor element 12.
- the semiconductor device 1 can be classified as CSP because its package size is almost equal to that of a semiconductor chip, or it can be said that the semiconductor device 1 is a flip chip having a stress relaxation function.
- the semiconductor element 12 has a plurality of electrodes 14 formed on one surface (active surface). In the case where the planar shape of the semiconductor element 12 is rectangular (square or rectangular), the plurality of electrodes 14 are formed along at least one side (including two opposing sides or all sides). Alternatively, a plurality of electrodes 14 may be formed at the center of one surface of the semiconductor element 12. Electric Avoiding the electrode 14, the semiconductor element 12, S iN, S i 0 2 , Mg_ ⁇ is Passhibe Chillon film 16, such as are formed.
- the passivation film 16 is an electrically insulating film.
- the passivation film 16 may be formed of a material other than the resin, unlike the plurality of resin layers in the present embodiment.
- the passivation film 16 may be formed on the entire surface of the semiconductor element 12 while avoiding at least a part of the electrode 14.
- the wiring 20 is electrically connected to the electrode 14 on the surface of the semiconductor element 12 where the electrode 14 is formed.
- the wiring 20 is often composed of a plurality of layers. For example, copper (Cu), chromium (Cr), titanium (Ti), nickel (Ni), titanium tungsten (TiW), gold (Au), aluminum (A1), nickel vanadium (NiV), tungsten
- the wiring 20 can be formed by laminating any of (W). When the electrode 14 is formed at the end of the semiconductor element 12, the wiring 20 is drawn toward the center of the semiconductor element 12. A wiring pattern is formed on the surface of the semiconductor element 12 by forming the wiring 20 by being connected to each electrode 14.
- the external terminal 30 is formed on the wiring 20 so as not to be directly above the electrode 14.
- the external terminal 30 is formed on the land portion 22 of the wiring 20, for example.
- the land portion 22 is formed to have a larger area than a portion (line) drawn from the electrode 14. Since the external terminal 30 is formed so as not to be directly above the electrode 14, the stress applied to the external terminal 30 is not directly applied to the electrode 14.
- the external terminal 30 is, for example, a solder ball, and is used for electrical connection with a circuit board.
- the first resin layer 40 may be formed of a plurality of layers, but is formed of a single layer in the example shown in FIG.
- the first resin layer 40 may have a stress relaxation function.
- the first resin layer 40 may be formed of polyimide resin, silicone-modified polyimide resin, epoxy resin, silicone-modified epoxy resin, benzocyclobutene (BCB), polybenzoxazole (PBO), or the like. Can be.
- the first resin layer 40 is formed in a region including below the wiring 20. More specifically, the first resin layer 40 is formed in the aggregate 10, and the land portions 22 and the lines connected thereto are formed on the first resin layer 40. In other words, the first resin layer 40 has a small At least it is formed between the wiring 20 and the semiconductor element 12.
- the second resin layer 100 is formed of one or more layers.
- the second resin layer 100 is formed in a region including above the wiring 20.
- the second resin layer 100 may be made of the same material as the first resin layer 40 described above, and at least one layer may have a stress relaxation function.
- second resin layer 100 may be formed of a material different from that of first resin layer 40.
- the second resin layer 100 includes an uppermost layer 60 and a lowermost layer 50.
- the uppermost layer 60 and the lowermost layer 50 may be formed of different materials.
- a material of the uppermost layer 60 it is preferable to use a material that can be used in the first resin layer 40 described above, and other materials constituting the first resin layer 40 and the second resin layer 100 are preferably used. It is particularly preferable to use a material having a lower Young's modulus than the material of the layer (the lowermost layer 50).
- the wiring 20 is partially connected to the electrode 14, and is routed from there to the first resin layer 40.
- the land 22 is formed on the first resin layer 40.
- the first resin layer 40 is formed in the aggregate 10 exposing the electrodes 14. More specifically, a first resin layer 40 is formed on the passivation film 16 of the aggregate 10.
- the lowermost layer 50 is, for example, a solder resist and is formed so as to cover the wiring 20. In this case, the lowermost layer 50 is formed avoiding the land portion 22 of the wiring 20. Further, the lowermost layer 50 may be formed also on the first resin layer 40.
- the uppermost layer 60 may be formed so as to cover the wiring 20 instead of the lowermost layer 50.
- the uppermost layer 60 is formed around the root of the external terminal 30. Alternatively, it may be formed to cover the side of the external terminal 30 except for the tip of the external terminal 30. In any case, by removing a part of the uppermost layer 60, at least the tip of the external terminal 30 is exposed.
- the thermal expansion coefficient of the second resin layer 100 may be larger than that of the first resin layer 40. As a result, stress applied to the external terminals 30 due to thermal stress can be reduced.
- the first resin layer 40 has a planar shape of a semiconductor element. It is formed so as to be located inside the outer periphery of the child 12. Specifically, the first resin layer 40 is formed avoiding the end of the semiconductor element 12. In that case, as shown in FIG. 1, the second resin layer 100 may also be formed avoiding the end of the semiconductor element 12.
- the end faces of the first resin layer 40 and the second resin layer 100 of the semiconductor device 1 may be end faces formed by, for example, an exposure technique, a printing method, an ink jet method, or the like described later. .
- the end face may be a smooth end face different from the mechanically cut face, and as shown in FIG. 1, the planar shape of each resin layer decreases in a direction away from the semiconductor element 12. It may be a tapered inclined surface.
- the end faces of the first resin layer 40 and the second resin layer 100 are located inside the outer periphery of the semiconductor device 1, so that their separation from the semiconductor element 12 can be suppressed. Can be.
- the second resin layer 100 is formed at the end of the semiconductor element 12. It may be formed so as to cover the surface. That is, the cut surface of the second resin layer 100 may be located at the end of the semiconductor device 1. In that case, only the uppermost layer 60 of the second resin layer 100 may be formed so as to cover the end of the semiconductor element 12. In particular, if the uppermost layer 60 is formed using a material having a Young's modulus lower than that of the other resin layers (the lowermost layer 50 of the first resin layer 40 and the second resin layer 100), the cutting area is reduced.
- the semiconductor element 12 It is possible to prevent the semiconductor element 12 from being broken at 70 °, to suppress the progress of the chipping, and to prevent the first resin layer 40 and the second resin layer 100 from peeling from the semiconductor element 12. it can. Furthermore, since the uppermost layer 60 does not have to be provided avoiding the end of the semiconductor element 12, a semiconductor device can be manufactured by a simple process. Hereinafter, a method for manufacturing a semiconductor device according to the present embodiment will be described with reference to FIGS. In the present embodiment, at least one resin layer (for example, at least the first resin layer 40) of the plurality of resin layers is formed avoiding the cutting region 70.
- a lowermost layer 50 which is one of the first resin layer 40, the tori line 20, and the second resin layer 100, is formed.
- an assembly 10 (see FIG. 8) having a plurality of electrodes 14 and having a passivation film 16 formed avoiding at least a part of the electrodes 14 is prepared.
- a first resin layer 40 for forming the wiring 20 is formed.
- the first resin layer 40 may be formed by an exposure technique. For example, as shown in FIG. 2, a first resin layer 40 is provided on the entire surface of the electrode 14 and the assembly 10 (specifically, on the passivation film 16).
- a material of the first resin layer 40 a resin whose property is changed in response to energy (light, ultraviolet light, radiation, or the like) can be used.
- a photopolymer can be used.
- the material of the first resin layer 40 may be a material whose solubility increases when irradiated with energy (positive type) or a material whose solubility decreases (negative type). .
- a hole 44 for exposing the electrode 14 is formed, and an opening 42 is formed in the cutting region 70. Holes 4 4 are formed for each electrode 14.
- the opening 42 is formed so as to be integrally opened along the cut region 70 of the assembly 10. In other words, the opening 42 is formed along the boundary between the adjacent semiconductor elements 12 in the assembly 10.
- a mask 80 in which openings 82 and 84 are formed is arranged above the first resin layer 40, and energy 90 is applied.
- the material of the first resin layer 40 increases in solubility when irradiated with energy
- the material is formed on the region where the opening 42 and the hole 44 are formed.
- the openings 82, 84 are placed in the openings.
- the material of the first resin layer 40 decreases in solubility when irradiated with energy, it covers the area where the opening 42 and the hole 44 are formed and covers the area. Place the opening on the other area. Thereafter, by developing, as shown in FIG.
- an opening 42 is formed corresponding to the opening 82, and a hole 44 exposing the electrode 14 is formed corresponding to the opening 84.
- the wiring 20 is formed on the first resin layer 40 from the electrode 14.
- the wiring 20 may be formed by photolithography, spattering, plating, or the like.
- the land portion 22 is formed in a part of the wiring 20, the land portion 22 is formed on the first resin layer 40.
- the wiring 20 is also formed on the inner surface of the hole 44 of the first resin layer 40.
- the external terminal 30 By drawing the wiring 20 from the electrode 14, the external terminal 30 is placed directly above the electrode 14. It can be formed avoiding. Further, this allows the external terminal 30 to be provided in the active region of the semiconductor element 12. That is, pitch conversion can be performed. Therefore, when the external terminals 30 are arranged, an area within the active area, that is, an area as a fixed surface can be provided, and the degree of freedom of the setting positions of the external terminals 30 is greatly increased. For example, the external terminals 30 may be arranged in a lattice by bending the wiring 20 at a required position.
- a lowermost layer 50 is formed.
- the lowermost layer 50 is provided on the entire surface of the first resin layer 40 and the wiring 20. In this case, the opening formed in the first resin layer 40
- This step is preferably performed after the first resin layer 40 is cured.
- a part of the wiring 20 (land part 22) is exposed, and an opening 52 is formed to avoid the cutting region 70.
- This may be performed by the same method as the step performed in the first resin layer 40.
- a mask 180 in which openings 18 2 and 18 4 are formed is arranged above the lowermost layer 50, and energy 90 is applied.
- the opening 1 is formed on the region where the opening 52 and the hole 54 are formed. 8 2 and 1 8 4 are arranged.
- the material of the lowermost layer 50 whose solubility decreases when irradiated with energy may be used. Thereafter, by developing, as shown in FIG. 5, the portion filled in the opening 42 is also removed and the opening 52 is formed corresponding to the opening 18 2. Further, a hole 54 exposing a part (land portion 22) of the wiring 20 is formed corresponding to the opening 184.
- the uppermost layer 60 described later may be formed on the wiring 20 by omitting the step of forming 50. As shown in FIGS. 6 and 7, the external terminals 30 and the uppermost layer 60 are formed. An external terminal 30 is formed on the wiring 20. More specifically, the external terminals 30 are formed on a part (land portion 22) of the wiring 20 formed on the first resin layer 40. When the lowermost layer 50 is formed, an external terminal 30 is provided on a part (land portion) of the wiring 20 exposed by the lowermost layer 50. By forming the lowermost layer 50, the external terminals 30 can be easily provided. Outside By arranging the terminals 30 on the first resin layer 40, the stress applied to the external terminals 30 can be reduced by using the first resin layer 40 as a stress relaxation layer. An external terminal 30 may be formed by providing a solder ball or the like on the land portion 22. Alternatively, a solder cream may be provided on the land 22 and melted to form a ball by surface tension.
- an uppermost layer 60 is formed.
- the uppermost layer 60 is formed by exposing at least the tip of the external terminal 30.
- the uppermost layer 60 may be provided at least around the root of the external terminal 30. Thereby, the stress (thermal stress) applied to the external terminals 30 can be reduced by using the uppermost layer 60 as a stress relaxation layer.
- an uppermost layer 60 made of a non-photosensitive resin is provided on the lowermost layer 50 and the external terminals 30 over the entire surface.
- the openings 42, 52 are also filled with the material of the uppermost layer 60.
- the portions filled in the openings 42 and 52 are also removed, and the openings 62 are further formed.
- the openings 42, 52, and 62 are vertically communicated to avoid the cutting area 70. be able to.
- the openings 52 and 62 of the lowermost layer 50 and the uppermost layer 60 are formed separately, but the cutting region 70 is formed after the lowermost layer 50 and the uppermost layer 60 are laminated. The opening to avoid this may be formed at once.
- the uppermost layer 60 may be formed only around the base of the external terminal 30. That is, the cut regions 70 may be avoided by connecting the openings 42 and 52 in the vertical direction. Note that, apart from the example described above, the uppermost layer 60 may be formed by applying an exposure technique in the same manner as the first resin layer 40.
- both the first resin layer 40 and the second resin layer 100 are formed so as to avoid the cutting region 70, but the present embodiment is not limited to this. That is, when the lowermost layer 50 and the uppermost layer 60 which are the second resin layer 100 are layers of a material having a lower Young's modulus than the first resin layer 40, the lowermost layer 50 and The uppermost layer 60 may be formed so as to cover the cutting region 70. In particular, the uppermost part that reinforces the periphery of the external terminals 30 Preferably, only the layer 60 is provided so as to cover the cutting region 70 (see the second embodiment).
- the material of the second resin layer 100 covering the cutting region 70 is younger than the material of the other layers (the lowermost layer 50) constituting the first resin layer 40 and the second resin layer 100. If the material has a low ratio, the occurrence and progress of chipping at the end of the semiconductor element 12 that occurs when the assembly 10 is cut are suppressed, and the first resin layer 40 and the second resin layer 1 are prevented from being chipped. Separation of the semiconductor element 100 from the semiconductor element 12 can be suppressed.
- the aggregate 10 is cut into individual pieces along the cutting region 70 c, that is, an aggregate of a plurality of semiconductor devices including an aggregate 10 of the plurality of semiconductor elements 12.
- the body is singulated to form a semiconductor device 1 for each semiconductor element 12.
- FIG. 7 is a diagram showing a cross section of the assembly 10 at the time of cutting
- FIG. 8 is a diagram showing the entire assembly 10 at the time of cutting.
- the assembly 10 is cut from the side on which the electrode 14 is formed.
- a blade 110 is arranged in a cutting region 70 formed at least so as to avoid the first resin layer 40, and cutting is performed.
- the assembly 110 can be cut by rotating the blade 110 at high speed.
- the aggregate 10 may be cut and attached to a tape (not shown) or the like.
- At least one resin layer (for example, at least the first resin layer 40) formed avoiding the cutting region 70 is formed by an inkjet method.
- the first resin layer 40 is provided so as to avoid the cutting region 70 and the electrode 14. According to the ink jet method, it is possible to fill the ink at high speed and economically without waste by applying the technology practically used for ink jet printing.
- the ink jet head 112 shown in FIG. 9 is used, for example, for an ink jet printer, and is a piezoelectric type using a piezoelectric element, or an electrothermal converter as an energy generating element.
- a bubble jet type or the like can be used. This makes it possible to freely set the discharge area and discharge pattern of the paste 46 to be the first resin layer 40.
- a material 114 composed of a component that repels the paste 46 of the first resin layer 40 is provided in the cutting region 70, and the first resin layer 40 is formed. Is also good.
- the material 114 may be, for example, a fluorine-based compound. Thereby, the first resin layer 40 can be formed reliably avoiding the cutting region 70.
- At least one resin layer (for example, at least the first resin layer 40) formed avoiding the cutting region 70 is formed by a printing method.
- the first resin layer 40 can be provided in a necessary region avoiding the cutting region 70 by a simple process.
- the first resin layer 40 is provided so as to avoid the cutting region 70 and the electrode 14.
- the cut region 70 and each electrode 14 are covered with a mask 122.
- the area other than the cutting area 70 and the electrode 14 becomes the opening of the mask 122.
- a paste 46 serving as a material of the first resin layer 40 is provided on the entire surface of the aggregate 10, and is uniformly applied to the opening area of the mask 122 at the height of the mask 122. Fill the paste 46.
- the opening 46 may be filled with the paste 46 using a squeegee 120.
- the first resin layer 40 can be formed in a necessary region avoiding the cutting region 70 and the electrode 14.
- At least one resin layer (for example, at least the first resin layer 40) is patterned in advance to form another member 130, and And formed in a region avoiding the cutting region 70.
- the first resin layer 40 can be formed in a region avoiding the cutting region 70.
- the first resin layer 40 is provided so as to avoid the cutting region 70 and the electrode 14.
- the material 114 may be provided and the first resin layer 40 may be removed.
- the first resin layer 40 can be surely formed avoiding the cutting region 70.
- FIG. 12 is a diagram showing the periphery of the external terminal 30 according to the present modification.
- This modification is a modification of the semiconductor device according to the present embodiment.
- the form of a portion provided around the external terminal 30 in the second resin layer 102 including the uppermost layer 160 is different from that described above.
- a diameter D 2 in a plan view of a joint portion of the external terminal 30 provided on the land portion 22 and a diameter D of the external terminal 30 are:
- the uppermost layer 160 is formed so as to have the following relationship. That is, the uppermost layer 160 may be formed so as to cover the periphery of the external terminal 30 to such an extent that the external terminal 30 does not hinder the electrical connection with the circuit board. In this case, as shown in FIG. 12, the portion of the uppermost layer 160 covering the external terminals 30 may be higher than the other surface of the uppermost layer 160.
- the external terminal 30 when the external terminal 30 is electrically connected to the circuit board, the electrical connection between them can be reliably protected.
- the stress applied to the joint between the external terminal 30 and the wiring 20 can be further alleviated, and the occurrence of cracks at the joint can be prevented. Therefore, a more reliable semiconductor device can be provided.
- the method of manufacturing the semiconductor device according to the present modification may be the same as described above.
- FIGS. 13 to 15 are views for explaining the semiconductor device and the method of manufacturing the same according to the present embodiment.
- FIG. 13 is a cross-sectional view of an assembly (semiconductor ⁇ wafer) including the semiconductor device according to the present embodiment.
- FIG. 14 is a plan view of the semiconductor device according to the present embodiment. Yes, specifically, it is a plan view of a semiconductor chip in which the assembly shown in FIG. 13 is cut into individual sides. In FIG. 14, the wiring 220 and the second resin layer 104 are omitted.
- FIG. 15 is a sectional view of an assembly (semiconductor wafer) including a semiconductor device according to a modification of the present embodiment.
- the semiconductor device includes an individual semiconductor element (semiconductor chip) 12, a wiring 220, an external terminal 30, and a plurality of resin layers (in FIG. 13, a first resin layer 2). 40 and the second resin layer 104). At least one of the resin layers (all the resin layers in FIG. 13) is formed so as to avoid the end of the semiconductor element 12 c.
- the form of the resin layer 24 is different from that of the first embodiment.
- the second resin layer 104 may be formed as a single layer. However, in the example shown in FIG. 13, the second resin layer 104 includes a plurality of uppermost layers 60 and lowermost layers 250.
- the semiconductor device 2 is obtained by cutting the semiconductor device shown in FIG. Except for the following description, the embodiment may be the same as the first embodiment.
- the electrode 14 is formed at an end.
- the first resin layer 240 is formed at the center of the semiconductor element 12. In other words, the first resin layer 240 is formed in a region inside the electrode 14 in the semiconductor element 12.
- the first resin layer 240 is formed of the electrodes 14 arranged on each side. It is formed in the area sandwiched by.
- the first resin layer 240 is formed in a region surrounded by the electrodes 14 arranged on each side. Is done.
- the first resin layer 240 formed on the semiconductor element 12 may be integrally formed in one region as shown in FIG. 14 in a plan view of the semiconductor element 12. Alternatively, it may be formed by dividing into a plurality of regions.
- the thermal expansion coefficient of the first resin layer 240 is different from the semiconductor element 12 to some extent, the formation region of the first resin layer 240 can be kept small. Therefore, the stress applied to the external terminal 30 can be reduced.
- the first resin layer 240 can be formed avoiding the cutting region 70.
- the wiring 220 is the same as that of the first embodiment.
- the electrode 14 may be formed on the first resin layer 240.
- the coefficient of thermal expansion of the first resin layer 240 may be smaller than that of the second resin layer 104. As a result, stress applied to the external terminals 30 due to thermal stress can be reduced.
- second resin layer 104 is formed such that its planar shape is located inside the outer periphery of semiconductor element 12. Specifically, the second resin layer 104 is formed avoiding the end of the semiconductor element 12. Other aspects may be the same as those of the first embodiment.
- the uppermost layer 60 of the second resin layer 104 may be formed so as to cover the end of the semiconductor element 12.
- the uppermost layer 60 is made of a material having a lower Young's modulus than the material of the other layers (the lowermost layer 250) constituting the first resin layer 240 and the second resin layer 104.
- it is used. That is, even if the uppermost layer 60 of the second resin layer 104 is formed up to the edge of the semiconductor element 12 among the plurality of resin layers, the chip of the edge of the semiconductor element 12 is effectively removed. Generation can be prevented, its progress can be suppressed, and peeling of the resin layer from the end of the semiconductor element 12 can be prevented.
- the first resin layer 240 is provided on the entire surface of the assembly 10 including the electrodes 14, exposure technology or the like is applied to the first resin layer 240 so that the plurality of electrodes 14 of each of the semiconductor elements 12 are formed. Formed in the inner area.
- the first resin layer 240 can be formed avoiding the cutting region 70.
- the lowermost layer 250 is formed if necessary. By forming a hole 254 exposing the land portion 222 in the lowermost layer 250, the external terminal 30 can be easily provided. Also, the bottom layer
- the step of forming 250 may be omitted.
- the external terminals 30 and the uppermost layer 60 are formed in the same manner as in the first embodiment, and the openings 25 2 and 62 are formed in the cut region 70. Thereafter, the aggregate 10 is cut along the cutting region 70. Thus, the separation of the plurality of resin layers of the semiconductor device can be suppressed.
- the external terminals of the top layer 60 are provided on the entire surface of the aggregate 10.
- the uppermost layer 60 can be formed by a simple process.
- a semiconductor device can be manufactured by applying the first to fourth modifications of the above-described embodiment.
- FIGS. 16 to 18 are views for explaining the semiconductor device and the method of manufacturing the same according to the present embodiment.
- FIG. 16 is a cross-sectional view of an assembly (semiconductor 1C) including the semiconductor device according to the present embodiment.
- FIG. 17 is a plan view of the semiconductor device according to the present embodiment. More specifically, FIG. 17 is a plan view of a semiconductor chip in which the assembly shown in FIG. In FIG. 16, the wiring 220 and the second resin layer 104 are omitted.
- FIG. 18 is a cross-sectional view of an assembly (semiconductor wafer) including a semiconductor device according to a modification of the present embodiment.
- the semiconductor device includes an individual semiconductor element (semiconductor chip) 12, a wiring 220, an external terminal 30, and a plurality of resin layers (the first resin layer 3 in FIG. 16). 40 and the second resin layer 104). At least one resin layer (all resin layers in FIG. 16) of the plurality of resin layers is formed avoiding the end of the semiconductor element 12.
- the semiconductor device 3 is different from the above-described embodiment in the form of the first resin layer 340.
- the semiconductor device 3 is obtained by cutting the semiconductor device shown in FIG. Except for the following description, the embodiment may be the same as in the first and second embodiments.
- the first resin layer 340 according to the present embodiment is formed only under the external terminal 30.
- One of the first resin layers 340 is formed under each external terminal 30 formed on the semiconductor element 12. That is, the first resin layers 340 are formed so that the number thereof is the same as the number of the external terminals 30.
- the outer shape of the first resin layer 340 is formed larger than the outer shape of the external terminal 30 in plan view of the semiconductor element 12.
- the outer shape of the first resin layer 340 may be circular or rectangular.
- the formation region of the first resin layer 340 is further reduced, so that the first resin layer 340 has a different thermal expansion coefficient from the semiconductor element 12 to some extent. / JP01 / 5
- the uppermost layer 60 of the second resin layer 104 may be formed so as to cover the end of the semiconductor element 12.
- the uppermost layer 60 is made of a material having a lower Young's modulus than the material of the other layers (the lowermost layer 250) constituting the first resin layer 340 and the second resin layer 104.
- it is used. That is, even if the uppermost layer 60 of the second resin layer 104 is formed up to the edge of the semiconductor element 12 among the plurality of resin layers, the chip of the edge of the semiconductor element 12 is effectively removed. Generation can be prevented, its progress can be suppressed, and peeling of the resin layer from the end of the semiconductor element 12 can be prevented.
- the first resin layer 3400 may be formed only under the external terminals 30 by the same method as in the second embodiment. Note that also in the present embodiment, a semiconductor device can be manufactured by applying the first to fourth modifications of the first embodiment.
- FIG. 19 shows a circuit board 1000 on which the semiconductor device 1 according to the present embodiment is mounted.
- an organic substrate such as a glass epoxy substrate is used for the circuit board 100.
- Wiring patterns made of, for example, copper are formed on the circuit board 100 so as to form a desired circuit, and these wiring patterns and the external terminals 30 of the semiconductor device 1 are mechanically connected to each other. Electrical continuity.
- FIG. 20 shows a notebook personal computer
- FIG. 21 shows a mobile phone 1200.
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Description
Claims
Priority Applications (1)
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EP01915722.1A EP1198003B1 (en) | 2000-03-23 | 2001-03-23 | Method of manufacturing a semiconductor device and electronic device |
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JP2000-81999 | 2000-03-23 | ||
JP2000081999 | 2000-03-23 |
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WO2001071805A1 true WO2001071805A1 (en) | 2001-09-27 |
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PCT/JP2001/002325 WO2001071805A1 (en) | 2000-03-23 | 2001-03-23 | Semiconductor device, method of manufacture thereof, circuit board, and electronic device |
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US (1) | US6707153B2 (ja) |
EP (1) | EP1198003B1 (ja) |
KR (1) | KR100440507B1 (ja) |
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TW (1) | TW515064B (ja) |
WO (1) | WO2001071805A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CN1381070A (zh) | 2002-11-20 |
EP1198003B1 (en) | 2013-08-28 |
TW515064B (en) | 2002-12-21 |
EP1198003A1 (en) | 2002-04-17 |
KR20020008181A (ko) | 2002-01-29 |
US6707153B2 (en) | 2004-03-16 |
US20020008320A1 (en) | 2002-01-24 |
CN1311547C (zh) | 2007-04-18 |
EP1198003A4 (en) | 2005-12-14 |
KR100440507B1 (ko) | 2004-07-15 |
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