WO2012043742A1 - Procédé de fabrication de substrat de boîtier pour montage d'éléments semi-conducteurs - Google Patents
Procédé de fabrication de substrat de boîtier pour montage d'éléments semi-conducteurs Download PDFInfo
- Publication number
- WO2012043742A1 WO2012043742A1 PCT/JP2011/072423 JP2011072423W WO2012043742A1 WO 2012043742 A1 WO2012043742 A1 WO 2012043742A1 JP 2011072423 W JP2011072423 W JP 2011072423W WO 2012043742 A1 WO2012043742 A1 WO 2012043742A1
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- WIPO (PCT)
- Prior art keywords
- metal foil
- carrier
- carrier metal
- multilayer
- plating
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 103
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000004065 semiconductor Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000011888 foil Substances 0.000 claims abstract description 391
- 229910052751 metal Inorganic materials 0.000 claims abstract description 334
- 239000002184 metal Substances 0.000 claims abstract description 334
- 238000007747 plating Methods 0.000 claims abstract description 114
- 239000010953 base metal Substances 0.000 claims abstract description 67
- 238000005530 etching Methods 0.000 claims abstract description 34
- 238000010030 laminating Methods 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 32
- 239000011889 copper foil Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 abstract description 17
- 239000011347 resin Substances 0.000 abstract description 17
- 239000000843 powder Substances 0.000 abstract description 11
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
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- 239000010410 layer Substances 0.000 description 156
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 53
- 229910044991 metal oxide Inorganic materials 0.000 description 32
- 150000004706 metal oxides Chemical class 0.000 description 32
- 239000011229 interlayer Substances 0.000 description 25
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 24
- 238000010438 heat treatment Methods 0.000 description 24
- 229910052750 molybdenum Inorganic materials 0.000 description 24
- 239000011733 molybdenum Substances 0.000 description 23
- 229910052759 nickel Inorganic materials 0.000 description 23
- 239000004020 conductor Substances 0.000 description 14
- 229910052802 copper Inorganic materials 0.000 description 13
- 239000010949 copper Substances 0.000 description 13
- 238000003825 pressing Methods 0.000 description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 238000009713 electroplating Methods 0.000 description 9
- 239000011521 glass Substances 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 239000004593 Epoxy Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 229920001721 polyimide Polymers 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910000365 copper sulfate Inorganic materials 0.000 description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 2
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910000457 iridium oxide Inorganic materials 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 229910003296 Ni-Mo Inorganic materials 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- JZCCFEFSEZPSOG-UHFFFAOYSA-L copper(II) sulfate pentahydrate Chemical compound O.O.O.O.O.[Cu+2].[O-]S([O-])(=O)=O JZCCFEFSEZPSOG-UHFFFAOYSA-L 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 description 1
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- RWVGQQGBQSJDQV-UHFFFAOYSA-M sodium;3-[[4-[(e)-[4-(4-ethoxyanilino)phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]-2-methylcyclohexa-2,5-dien-1-ylidene]methyl]-n-ethyl-3-methylanilino]methyl]benzenesulfonate Chemical compound [Na+].C1=CC(OCC)=CC=C1NC1=CC=C(C(=C2C(=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C)C=2C(=CC(=CC=2)N(CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C)C=C1 RWVGQQGBQSJDQV-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4682—Manufacture of core-less build-up multilayer circuits on a temporary carrier or on a metal foil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- 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
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4846—Leads on or in insulating or insulated substrates, e.g. metallisation
- H01L21/4857—Multilayer substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68345—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used as a support during the manufacture of self supporting substrates
-
- 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
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
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- 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
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2225/00—Details relating to assemblies covered by the group H01L25/00 but not provided for in its subgroups
- H01L2225/03—All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00
- H01L2225/04—All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00 the devices not having separate containers
- H01L2225/065—All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00 the devices not having separate containers the devices being of a type provided for in group H01L27/00
- H01L2225/06503—Stacked arrangements of devices
- H01L2225/06555—Geometry of the stack, e.g. form of the devices, geometry to facilitate stacking
- H01L2225/06568—Geometry of the stack, e.g. form of the devices, geometry to facilitate stacking the devices decreasing in size, e.g. pyramidical stack
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- 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
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0147—Carriers and holders
- H05K2203/0152—Temporary metallic carrier, e.g. for transferring material
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/15—Position of the PCB during processing
- H05K2203/1536—Temporarily stacked PCBs
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0097—Processing two or more printed circuits simultaneously, e.g. made from a common substrate, or temporarily stacked circuit boards
Definitions
- the present invention relates to a method for manufacturing a package substrate for mounting a semiconductor element capable of increasing the density.
- PoP Package on Package
- SiP System in Package
- an interlayer connection hole is provided in an insulating base material provided with a thin copper foil having a thickness of about 2 ⁇ m, and a thickness of about 0.1 ⁇ m is formed on the thin copper foil and in the interlayer connection hole.
- Perform thin electroless copper plating form a plating resist on it, thicken the part that will become the outer layer circuit by pattern electroplating, then remove the plating resist and etch the entire surface to perform pattern electroplating.
- Patent Document 1 There is a method of forming an outer layer circuit by removing only a portion that is not (that is, only a thin portion of a conductor)
- a support substrate is formed by providing an insulating resin on the carrier copper foil surface of an ultrathin copper foil (thickness 1 to 5 ⁇ m) with a carrier copper foil that can be physically peeled, After forming a conductor pattern to be an outer layer circuit by pattern copper plating, forming an insulating resin and interlayer connection on it, the support substrate including the carrier copper foil is physically peeled off, and the ultrathin copper foil is removed by etching Thus, there is a method of forming a fine outer layer circuit (Patent Document 2).
- a wiring film having a predetermined pattern is formed on the surface of the intermediate film of the carrier film, conductive pillars are formed on the surface of the wiring film by pattern plating, and two wiring members on which an interlayer insulating film is formed are prepared.
- wiring is formed by stacking and integrating so that the end surfaces of pillars are in contact with each other, removing the carrier film by etching using the intermediate film as an etching stop layer, and further removing the intermediate film by etching (Patent Document 3).
- the carrier film is removed by etching using the intermediate film as an etching stop layer, and further the intermediate film is removed by etching.
- the yield is lowered because defects such as pinholes are likely to occur in the etching stop layer.
- etching is performed in two stages, the unevenness on the surface of the formed outer layer circuit may increase, and the connection reliability with the semiconductor element may decrease.
- connection terminal flip chip connection or wire bonding connection is used for electrical connection between the semiconductor element and the connection terminal of the package substrate.
- connection terminal becomes finer, the influence of surface irregularities on the connection reliability tends to increase. For this reason, flattening of the surface of the outer layer circuit to be the connection terminal is required.
- formation of bumps, pillars, etc. may be required depending on the connection form with the semiconductor element to be mounted.
- the present invention has been made in view of the above problems, yield can be improved by suppressing the adhesion of resin powder, there is fine and adhesive force by forming an embedded circuit without undercut, An outer layer circuit having a flat surface can be formed, and a method for manufacturing a package substrate for mounting a semiconductor element capable of forming various metal structures such as bumps and pillars by forming a three-dimensional circuit at an arbitrary position is provided. .
- the present invention relates to the following.
- a multilayer metal foil in which a first carrier metal foil, a second carrier metal foil, and a base metal foil are laminated in this order is prepared, and a base metal foil side of the multilayer metal foil and a base material are laminated to form a core substrate.
- a step of physically peeling the first carrier metal foil between the first carrier metal foil and the second carrier metal foil of the multilayer metal foil, and the second carrier remaining on the core substrate A step of performing a first pattern plating on the metal foil, a step of forming an insulating layer on the second carrier metal foil including the first pattern plating, and a second of the multilayer metal foil.
- a step of physically peeling the first carrier metal foil between the first carrier metal foil and the second carrier metal foil of the multilayer metal foil, and the second carrier remaining on the core substrate A step of performing a first pattern plating on the metal foil, a step of forming an insulating layer on the second carrier metal foil including the first pattern plating, and a second of the multilayer metal foil.
- Step of performing pattern plating of 2 and before A step of removing the second carrier metal foil other than the portion subjected to the second pattern plating by etching and forming a three-dimensional circuit on the first pattern plating or on the insulating layer.
- a manufacturing method of a package substrate (3) A multilayer metal foil in which a first carrier metal foil, a second carrier metal foil, and a base metal foil are laminated in this order is prepared, and the base metal foil side of the multilayer metal foil and the base material are laminated to form a core substrate.
- a step of physically peeling the first carrier metal layer between the first carrier metal foil and the second carrier metal foil of the multilayer metal foil, and the second carrier remaining on the core substrate A step of performing a first pattern plating on the metal foil, a step of forming an insulating layer on the second carrier metal foil including the first pattern plating, and a second of the multilayer metal foil.
- the multilayer metal foil has a peel strength between the second carrier metal foil and the base metal foil, the first carrier metal foil and the second carrier metal foil
- a method of manufacturing a package substrate for mounting a semiconductor element which is a multilayer metal foil formed larger than the peel strength between.
- the multilayer metal foil is formed on the surface of the second carrier copper foil provided with irregularities having an average roughness (Ra) of 0.3 ⁇ m to 1.2 ⁇ m in advance.
- Ra average roughness
- the present invention it is possible to improve the yield by suppressing the adhesion of the resin powder, and it is possible to form an outer layer circuit having a fine and adhesive force and a flat surface by forming an embedded circuit that does not cause an undercut.
- a multilayer metal foil 9 formed by laminating a first carrier metal foil 10, a second carrier metal foil 11, and a base metal foil 12 in this order is prepared.
- the first carrier metal foil 10 is for protecting the surface of the second carrier metal foil 11 (the surface on the first carrier metal foil 10 side), and is physically separated from the second carrier metal foil 11. It is possible.
- the material and thickness are not particularly limited as long as the surface of the second carrier metal foil 11 can be protected. However, from the viewpoint of versatility and handleability, the material is preferably copper foil or aluminum foil, and the thickness is preferably 1 to 35 ⁇ m. Moreover, it is preferable to provide the peeling layer 13 between the 1st carrier metal foil 10 and the 2nd carrier metal foil 11 for stabilizing the peeling strength between these metal foils 10 and 11, and peeling.
- the layer 13 is preferably one in which the peel strength is stabilized even if the heating and pressurization at the time of laminating with the insulating resin are performed a plurality of times.
- a release layer 13 include those in which a metal oxide layer and an organic agent layer disclosed in JP-A-2003-181970 are formed, and Cu—Ni—Mo disclosed in JP-A-2003-094553. Examples thereof include those made of an alloy and those containing a metal oxide of Ni and W or a metal oxide of Ni and Mo shown in the republished patent WO 2006/013735.
- the second carrier metal foil 11 serves as a seed layer for supplying a current for performing the first pattern plating 18 on the surface after the first carrier metal foil 10 is peeled off.
- the material and thickness are not particularly limited. However, from the viewpoint of versatility and handleability, the material is preferably copper foil or aluminum foil, and the thickness is 1 to 18 ⁇ m. Can be used. However, as will be described later, when the outer layer circuit 2 is formed (FIG. 7 (n), FIG. 8 (n), FIG. 10 (m)), it is removed by etching, so variation in etching amount is reduced as much as possible.
- an ultrathin metal foil of 1 to 5 ⁇ m is preferable.
- the release layer 13 is preferably provided between the first carrier metal foil 10 and the base metal foil 12, in order to stabilize the peel strength between these metal foils 10, 12, the release layer 13, as described above.
- the release layer 14 is preferably conductive so that the second carrier metal foil 11 and the base metal foil 12 are integrated to act as a seed layer.
- the peeling layer 14 physically peels between the 2nd carrier metal foil 11 and the base metal foil 12, it is desirable to transfer to the base metal foil 12 side.
- the base metal foil 12 is positioned on the side laminated with the base material 16 when the multilayer metal foil 9 is laminated with the base material 16 to produce the core substrate 17. It can be physically peeled between.
- the material and the thickness are not particularly limited as long as they have adhesiveness with the base material 16, but the material is copper foil or aluminum foil in terms of versatility and handleability.
- the thickness is preferably 9 to 70 ⁇ m. Further, in order to stabilize the peel strength between the second carrier metal foil 11 and the metal foil 11, it is preferable to provide the peel layer 14 as described above.
- the multilayer metal foil 9 is a multilayer metal foil 9 having three or more layers of metal foils (for example, as described above, the first carrier metal foil 10, the second carrier metal foil 11, and the base metal foil 12), Physical separation between at least two locations (for example, as described above, between the first carrier metal foil 10 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the base metal foil 12) Use what is possible.
- foreign matter such as resin powder may adhere to the surface of the first carrier metal foil 10.
- the second carrier metal that is not affected by foreign matters such as resin powder is obtained by physically peeling the first carrier metal foil 10 from the second carrier metal foil 11. Since the surface of the foil 11 is formed, a high-quality metal foil surface can be secured. Therefore, even when the first pattern plating 18 is performed using the second carrier metal foil 11 as a seed layer, the occurrence of defects can be suppressed, so that the yield can be improved.
- the base metal foil 12 side of the multilayer metal foil 9 and the base material 16 are laminated to form a core substrate 17.
- the base material 16 is laminated and integrated with the multilayer metal foil 9 to form the core substrate 17.
- the base material 16 is generally used as the insulating layer 3 of the semiconductor element mounting package substrate 1. Can be used. Examples of the substrate 16 include glass epoxy and glass polyimide.
- the core substrate 17 serves as a support substrate when the package substrate 1 is manufactured using the multilayer metal foil 9. By ensuring rigidity, workability is improved and damage during handling is prevented. The main role is to improve the yield. For this reason, it is desirable that the substrate 16 has a reinforcing material such as glass fiber.
- a prepreg such as glass epoxy or glass polyimide is overlapped with the multilayer metal foil 9 and heated / heated using a hot press or the like. It can be formed by pressing and laminating and integrating.
- Multilayer metal foil 9 is laminated on both sides of substrate 16 (upper and lower sides in FIG. 2 (a)), and the subsequent steps are performed to advance the process of manufacturing two package substrates 1 in a single process. Therefore, man-hours can be reduced.
- the laminated board of a symmetrical structure can be comprised on both sides of the core board
- the first carrier metal foil is physically peeled between the first carrier metal foil 10 and the second carrier metal foil 11 of the multilayer metal foil 9.
- the first carrier metal foil 10 On the surface of the first carrier metal foil 10, there may be a case where foreign matters such as resin powder from a prepreg or the like that becomes a material of the base material 16 at the time of lamination adhere.
- foreign matter such as resin powder adhered to the surface may cause defects such as disconnection or short circuit in the circuit, leading to a decrease in yield. there is a possibility.
- the first carrier metal foil 10 is peeled and removed in this way, a circuit can be formed using the second carrier metal foil 11 to which no foreign matter such as resin powder adheres.
- the peeling work can be easily performed by adjusting the peel strength between the first carrier metal foil 10 and the second carrier metal foil 11. Can do.
- the surface of the 2nd carrier metal foil 11 is exposed to the 2nd carrier metal foil 11 side after peeling the 1st carrier metal foil 10, it is on the 2nd carrier metal foil 11 performed by a post process.
- the formation of the plating resist and the formation of the first pattern plating 18 are not hindered by the release layer 13.
- the peel strength between the second carrier metal foil 11 and the base metal foil 12 is greater than the peel strength between the first carrier metal foil 10 and the second carrier metal foil 11. It is desirable that the multilayer metal foil 9 be formed. This suppresses simultaneous peeling between the second carrier metal foil 11 and the base metal foil 12 when physically peeling between the first carrier metal foil 10 and the second carrier metal foil 11. be able to.
- the peel strength between the first carrier metal foil 10 and the second carrier metal foil 11 at the initial stage before heating and pressurization (before the core substrate 17 is formed by laminating the prepreg serving as the base material 16), 2 N / m to 50 N / m, 10 N / m to 70 N / m between the second carrier metal foil 11 and the base metal foil 12, and peeling between the first carrier metal foil 10 and the second carrier metal foil 11
- the strength is 5 N / m to 20 N / m less than the peel strength between the second carrier metal foil 11 and the base metal foil 12, and after heating and pressurizing (a prepreg serving as a base material 16 is laminated to form a core substrate
- the rate of change in peel strength after forming 17 is about 20% or less relative to the initial value, the peel does not peel off due to handling in the manufacturing process, but peels off even after heating and pressurizing. Easy to do, Upon the release of the first carrier metal foil 10 duck, good workability since the second carrier metal foil 11 can be prevented peeling is
- the adjustment of the peel strength is performed by using the second carrier metal foil 11 serving as the base of the release layer. This can be achieved by adjusting the roughness of the surface (the surface on the first carrier metal foil 10 side) or by adjusting the plating solution composition and conditions for forming a metal oxide or alloy plating layer to be a release layer. .
- the first pattern plating 18 is performed on the second carrier metal foil 11 remaining on the core substrate 17.
- the surface of the second carrier metal foil 11 (the surface on the first carrier metal foil 10 side) does not adhere to foreign matters such as resin powder from the prepreg used at the time of lamination, so the circuit resulting from this Defects can be suppressed.
- the first pattern plating 18 can be performed using electroplating after forming a plating resist (not shown) on the second carrier metal foil 11.
- a plating resist a photosensitive resist used in a general package substrate manufacturing process can be used.
- the electroplating copper sulfate plating used in a general package substrate manufacturing process can be used.
- the multilayer metal foil 9 is formed by laminating the first carrier metal foil 10 on the surface of the second carrier metal foil 11 provided with irregularities having an average roughness (Ra) of 0.3 ⁇ m to 1.2 ⁇ m in advance via a release layer 13.
- the multilayer metal foil 9 is desirable. Thereby, the surface of the second carrier metal foil 11 after the first carrier metal foil 10 is physically peeled off together with the peeling layer 13 has irregularities with an average roughness (Ra) provided in advance of 0.3 ⁇ m to 1.2 ⁇ m.
- the plating resist for the first pattern plating 18 is formed on the surface of the second carrier metal foil 11 (the surface on the first carrier metal foil 10 side), the adhesion and resolution of the plating resist are improved.
- the surface roughness of the irregularities provided on the surface of the second carrier metal foil 11 has an average roughness (Ra) of 0.3 to 1.2 ⁇ m, while improving the adhesion and resolution of the plating resist. It is desirable at the point which can ensure the peelability after 1 pattern plating 18.
- the average roughness (Ra) is less than 0.3 ⁇ m, the adhesion of the plating resist tends to be insufficient, and when the average roughness (Ra) exceeds 1.2 ⁇ m, the plating resist becomes difficult to follow and the adhesion is insufficient. Tend to occur.
- the average roughness (Ra) is desirably 0.5 ⁇ m to 0.9 ⁇ m.
- the average roughness (Ra) is an average roughness (Ra) defined by JIS B 0601 (2001), and can be measured using a stylus type surface roughness meter or the like.
- adjustment of average roughness (Ra) is the composition (additive etc.) of the electro copper plating at the time of forming the copper foil as the 2nd carrier metal foil 11 if the 2nd carrier metal foil 11 is a copper foil. And the conditions (current density, time, etc.) can be adjusted.
- the insulating layer 3 is laminated on the second carrier metal foil 11 including the first pattern plating 18 to form a laminate 22.
- the insulating layer 3 one generally used as the insulating layer 3 of the package substrate 1 can be used.
- the insulating layer 3 include an epoxy resin and a polyimide resin.
- an epoxy or polyimide adhesive sheet, a glass epoxy or a glass polyimide prepreg is heated and heated using a hot press or the like. It can be formed by pressing and laminating and integrating.
- the laminated body 22 refers to one laminated on the second carrier metal foil 11 including the first pattern plating 18 among those laminated and integrated.
- this conductor layer 20 is also included.
- the inner layer circuit 6 is formed by the conductor layer 20 or the interlayer connection 5 for connecting the conductor layer 20 is formed, the inner layer circuit 6 and the interlayer connection 5 are also included.
- the interlayer connection hole 21 may be formed, and the interlayer connection 5 and the inner layer circuit 6 may be formed.
- the interlayer connection 5 can be formed, for example, by forming the interlayer connection hole 21 by using a so-called conformal method and then plating the interlayer connection hole 21.
- electroless copper plating, electrolytic copper plating, filled via plating, or the like can be used as the thick plating after thin electroless copper plating is performed as the base plating.
- the inner layer circuit 6 can be formed, for example, by plating the interlayer connection hole 21 and then removing the unnecessary conductor layer 20 by etching.
- the insulating layer 3 and the conductor layer 20 are further formed on the inner circuit 6 and the interlayer connection 5, Similarly to the case of FIGS. 3E and 3F, the inner layer circuit 6, the outer layer circuits 2 and 7, and the interlayer connection 5 can be formed so as to have a desired number of layers.
- the laminate 22 is physically separated from the core substrate 17 together with the second carrier metal foil 11. Exfoliate and separate.
- the peeling layer 14 between the second carrier metal foil 11 and the base metal foil 12 of the multilayer metal foil 9 is moved to the base metal foil 12 side.
- an etching resist 25 is formed on the second carrier metal foil 11 of the laminated body 22 that has been separated and peeled, and the second structure of the laminated body 22 is obtained.
- the two-carrier metal foil 11 is etched to expose the first pattern plating 18 on the surface of the insulating layer 3 and to form a three-dimensional circuit 24 on the first pattern plating 18 or on the insulating layer 3.
- the second pattern plating 23 is performed on the second carrier metal foil 11 of the laminated body 22 that has been separated and peeled, and the second pattern.
- the second carrier metal foil 11 other than the portion where the plating 23 has been performed is removed by etching to expose the first pattern plating 18 on the surface of the insulating layer 3, and on the first pattern plating 18 or the insulating layer 3.
- a three-dimensional circuit 24 can also be formed.
- the second carrier metal foil 11 of the separated laminate 22 is removed by etching or the like, and the first pattern plating 18 is replaced with the insulating layer 3.
- Expose to the surface of. 7 (l), (m), (n), FIG. 8 (l), (m), (n) and FIG. 10 (l), (m), (n) are shown in FIG. 6 (k). Only the lower part of the laminated body 22 separated as shown in FIG.
- the outer layer circuit 2 when the outer layer circuit 2 is formed, the side surface of the outer layer circuit 2 is not eroded by etching, so that no undercut occurs, so that the fine outer layer circuit 2 can be formed. Further, since the outer layer circuit 2 formed in the present invention is embedded in the insulating layer 3, not only the bottom surface of the outer layer circuit 2 but also the side surfaces on both sides are in close contact with the insulating layer 3, so that the fine circuit Even so, sufficient adhesion can be ensured. Further, when an ultrathin copper foil having a thickness of 1 ⁇ m to 5 ⁇ m is used as the second carrier metal foil 11, the second carrier metal foil 11 can be removed even with a slight etching amount, so that it is embedded in the insulating layer 3.
- connection terminal with the semiconductor element can be provided in the outer layer circuit 2 at a position overlapping the interlayer connection 5 in plan view, the connection terminal with the semiconductor element is provided directly above or immediately below the interlayer connection 5. It is possible to cope with downsizing and high density. Furthermore, it is possible to form various metal structures such as bumps and pillars by forming the solid circuit 24 at an arbitrary place, and by changing the thickness of the second carrier metal foil 11 and the second pattern plating 23, any metal structure can be formed. Therefore, it is possible to cope with various semiconductor elements (not shown) and connection forms with other package substrates. For example, as shown in FIG. 9, PoP can be configured without providing a cavity.
- solder resist 4 and protective plating 8 may be formed as necessary.
- the protective plating 8 nickel plating and gold plating which are generally used as protective plating for connection terminals of the package substrate are desirable.
- a package substrate having a flat and fine embedded circuit at a position overlapping with an interlayer connection, which is suitable for wire bonding and flip chip connection.
- a package substrate can be formed.
- a package substrate having various metal structures such as bumps and pillars can be formed by forming a three-dimensional circuit at an arbitrary location.
- Example 1 First, as shown in FIG. 1, the multilayer metal foil 9 formed by laminating the first carrier metal foil 10, the second carrier metal foil 11, and the base metal foil 12 in this order was prepared.
- the first carrier metal foil 10 is a 9 ⁇ m copper foil
- the second carrier metal foil 11 is a 3 ⁇ m ultrathin copper foil
- the base metal foil 12 is an 18 ⁇ m copper foil.
- a release layer 14 was provided on the surface of the base metal foil 12 (the surface on the second carrier metal foil 11 side) so that physical peeling was possible. Further, the surface of the second carrier metal foil 11 (the surface on the first carrier metal foil 10 side) was provided with irregularities having an average roughness (Ra) of 0.7 ⁇ m in advance.
- a release layer 13 was provided on the unevenness, that is, between the first carrier metal foil 10 so as to allow physical peeling.
- the release layers 13 and 14 between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are both Ni (nickel) and Mo (molybdenum). ), And forming a metal oxide layer using a plating bath containing citric acid.
- the peel strength was adjusted by adjusting the current density and time to adjust the amount of metal oxide forming the peel layers 13 and 14. At this time, the initial peel strength before heating and pressurization (before forming the core substrate 17 by laminating the prepreg serving as the base material 16) is 47 N between the base metal foil 12 and the second carrier metal foil 11.
- the distance between the second carrier metal foil 11 and the first carrier metal foil 10 was 29 N / m. Note that the rate of change in peel strength after heating and pressing (after forming the core substrate 17 by laminating the prepreg serving as the base material 16) was about 10% higher than the initial level.
- the multilayer metal foil 9 shown in FIG. 1 was produced as follows. (1) As the base metal foil 12, an electrolytic copper foil having a thickness of 18 ⁇ m was used, immersed in sulfuric acid 30 g / L for 60 seconds, washed with acid and then washed with running water for 30 seconds.
- Nickel sulfate hexahydrate as a plating bath containing Ni (nickel), Mo (molybdenum), and citric acid, with the washed electrolytic copper foil as the cathode, the Ti electrode plate with iridium oxide coating as the anode, and Ni (nickel), Mo (molybdenum), and citric acid 30 g / L, sodium molybdate dihydrate 3.0 g / L, trisodium citrate dihydrate 30 g / L, pH 6.0, bath temperature of 30 ° C. Electrolytic treatment was performed at a current density of 20 A / dm 2 for 5 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum.
- a release layer 13 containing a metal oxide was formed.
- the surface after forming the release layer 13 is subjected to electrolytic plating at a current density of 4 A / dm 2 for 600 seconds using the same bath as the above (3), and the first carrier metal foil 10 having a thickness of 9 ⁇ m A metal layer was formed.
- Granular roughened particles were formed on the surface in contact with the substrate 16 by copper sulfate plating, and subjected to chromate treatment and silane coupling agent treatment. Further, the chromate treatment was applied to the surface not in contact with the substrate 16.
- the base metal foil 12 side of the multilayer metal foil 9 and the base material 16 were laminated to form a core substrate 17.
- a glass epoxy prepreg was used as the substrate 16, and the multilayer metal foils 9 were stacked on both upper and lower sides of the prepreg, and were laminated and integrated by heating and pressing using a hot press.
- the first carrier metal foil 10 was physically peeled between the first carrier metal foil 10 and the second carrier metal foil 11 of the multilayer metal foil 9.
- the first pattern plating 18 was performed on the second carrier metal foil 11 remaining on the core substrate 17.
- the first pattern plating 18 was formed using copper sulfate electroplating after forming a photosensitive plating resist on the second carrier metal foil 11.
- a copper foil (12 ⁇ m) is laminated as the insulating layer 3 and the conductor layer 20 on the second carrier metal foil 11 including the first pattern plating 18 to form a laminate 22.
- the insulating layer 3 was formed by laminating and integrating an epoxy adhesive sheet by heating and pressing using a hot press.
- the interlayer connection 5 was formed by forming the interlayer connection hole 21 using a conformal method and then plating the interior of the interlayer connection hole 21.
- thin electroless copper plating was performed as a base plating
- a photosensitive plating resist was formed
- thick plating was performed by copper sulfate electroplating.
- the inner layer circuit 6 was formed by removing the unnecessary conductor layer 20 by etching.
- the insulating layer 3 and the conductor layer 20 are further formed on the inner circuit 6 and the interlayer connection 5,
- the inner layer circuit 6, the outer layer circuits 2 and 7, and the interlayer connection 5 were formed to form a laminate 22 having four conductor layers 20.
- the laminate 22 is physically separated from the core substrate 17 together with the second carrier metal foil 11. Peeled off and separated.
- an etching resist is formed on the second carrier metal foil 11 of the laminated body 22 that has been separated and peeled, and the second of the laminated body 22 is formed.
- the carrier metal foil 11 was etched to expose the first pattern plating 18 on the surface of the insulating layer 3 and to form a three-dimensional circuit 24 on the first pattern plating 18 or on the insulating layer 3.
- the peel strengths between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are all Ni (nickel), Mo (molybdenum), and quencher.
- the amount of the metal oxide forming the release layers 13 and 14 was adjusted and changed. Specifically, electrolytic treatment is performed at a current density of 10 A / dm 2 for 10 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum, and electrolytic treatment is performed at a current density of 7.5 A / dm 2 for 15 seconds.
- a release layer 13 containing a metal oxide made of nickel and molybdenum was formed.
- the initial peel strength before heating and pressurization at this time is 23 N / m between the base metal foil 12 and the second carrier metal foil 11, and between the second carrier metal foil 11 and the first carrier metal foil 10.
- the peel strength after heating / pressurizing was about 10 to 20% higher than the initial level.
- a package substrate was fabricated in the same manner as in Example 1 except for this.
- the peel strengths between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are all Ni (nickel), Mo (molybdenum), and quencher.
- the amount of the metal oxide forming the release layers 13 and 14 was adjusted and changed by changing the current when forming the metal oxide layer using a plating bath containing an acid. Specifically, electrolytic treatment is performed at a current density of 5 A / dm 2 for 20 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum, and electrolytic treatment is performed at a current density of 2 A / dm 2 for 20 seconds. And a release layer 13 containing a metal oxide made of molybdenum.
- the initial peel strength before heating and pressing at this time is 15 N / m between the base metal foil 12 and the second carrier metal foil 11, and between the second carrier metal foil 11 and the first carrier metal foil 10.
- the peel strength after heating / pressurizing was about 10 to 20% higher than the initial level.
- a package substrate was fabricated in the same manner as in Example 1 except for this.
- Example 4 The peel strengths between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are all Ni (nickel), Mo (molybdenum), and quencher.
- the amount of the metal oxide forming the release layers 13 and 14 was adjusted and changed by changing the current when forming the metal oxide layer using a plating bath containing an acid. Specifically, electrolytic treatment is performed at a current density of 25 A / dm 2 for 4 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum, and electrolytic treatment is performed at a current density of 20 A / dm 2 for 4 seconds. And a release layer 13 containing a metal oxide made of molybdenum.
- the initial peel strength before heating and pressurization at this time is 68 N / m between the base metal foil 12 and the second carrier metal foil 11, and between the second carrier metal foil 11 and the first carrier metal foil 10.
- the peel strength after heating / pressurizing was about 5 to 10% higher than the initial value.
- the multilayer metal foil 9 prepared above instead of the steps shown in FIGS. 7 (l), (m), and (n) of Example 1, it is shown in FIGS. 8 (l), (m), and (n).
- the second pattern metal plating 23 is performed on the second carrier metal foil 11 of the laminate 22 separated and peeled, and the second carrier metal foil 11 other than the portion where the second pattern metal plating 23 is performed is etched.
- the first pattern plating 18 was exposed on the surface of the insulating layer 3 and the three-dimensional circuit 24 was formed on the first pattern plating 18 or the insulating layer 3.
- a package substrate was fabricated in the same manner as in Example 1 except for this step.
- the peel strengths between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are all Ni (nickel), Mo (molybdenum), and quencher.
- the amount of the metal oxide forming the release layers 13 and 14 was adjusted and changed by changing the current when forming the metal oxide layer using a plating bath containing an acid. Specifically, electrolytic treatment is performed at a current density of 20 A / dm 2 for 5 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum, and electrolytic treatment is performed at a current density of 10 A / dm 2 for 10 seconds. And a release layer 13 containing a metal oxide made of molybdenum.
- the initial peel strength before heating and pressurization at this time is 43 N / m between the base metal foil 12 and the second carrier metal foil 11, and between the second carrier metal foil 11 and the first carrier metal foil 10.
- the peel strength after heating and pressing was about 10 to 15% higher than the initial value.
- a package substrate was fabricated in the same manner as in Example 4 except for this.
- the peel strengths between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are all Ni (nickel), Mo (molybdenum), and quencher.
- the amount of the metal oxide forming the release layers 13 and 14 was adjusted and changed by changing the current when forming the metal oxide layer using a plating bath containing an acid. Specifically, electrolytic treatment is performed at a current density of 10 A / dm 2 for 10 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum, and electrolytic treatment is performed at a current density of 2.5 A / dm 2 for 40 seconds. A release layer 13 containing a metal oxide made of nickel and molybdenum was formed.
- the initial peel strength before heating and pressurization at this time is 22 N / m between the base metal foil 12 and the second carrier metal foil 11, and between the second carrier metal foil 11 and the first carrier metal foil 10.
- the peel strength after heating and pressing was about 5 to 15% higher than the initial level.
- a package substrate was fabricated in the same manner as in Example 4 except for this.
- the peel strengths between the base metal foil 12 and the second carrier metal foil 11 and between the second carrier metal foil 11 and the first carrier metal foil 10 are all Ni (nickel), Mo (molybdenum), and quencher.
- the amount of the metal oxide forming the release layers 13 and 14 was adjusted and changed by changing the current when forming the metal oxide layer using a plating bath containing an acid. Specifically, electrolytic treatment is performed at a current density of 20 A / dm 2 for 5 seconds to form a release layer 14 containing a metal oxide composed of nickel and molybdenum, and electrolytic treatment is performed at a current density of 10 A / dm 2 for 10 seconds. And a release layer 13 containing a metal oxide made of molybdenum.
- the initial peel strength before heating and pressurization at this time is 45 N / m between the base metal foil 12 and the second carrier metal foil 11, and between the second carrier metal foil 11 and the first carrier metal foil 10.
- Table 1 shows the finished state of the outer layer circuit 2 embedded in the insulating layer 3 for Examples 1 to 7, the peel strength between the first carrier metal foil 10 and the second carrier metal foil 11, the second The peel strength between the carrier metal foil 11 and the base metal foil 12 and the presence or absence of peeling of the carrier metal foil during handling are shown.
- ⁇ in Table 1 indicates no undercut.
- no undercut had occurred.
- the second carrier metal foil 11 is made of ultra-thin copper having a thickness of 3 ⁇ m, the second carrier metal foil 11 was uniformly removed with a slight etching amount, and the surface of the outer circuit 2 was almost flat. Also, in all of Examples 1 to 6, there is a gap between the first carrier metal foil 10 and the second carrier metal foil 11 or between the second carrier metal foil 11 and the base metal foil 12 by handling in the manufacturing process. There was no peeling (“ ⁇ ” in Table 1 indicates no peeling). Further, when peeling between the first carrier metal foil 10 and the second carrier metal foil 11, there was no peeling between the second carrier metal foil 11 and the base metal foil 12.
- Measurement of the initial peel strength (N / m) before heating / pressurization (before forming the core substrate 17 by laminating the prepreg to be the base material 16) is made of a multilayer metal foil sample cut to a width of 10 mm. Then, using Tensilon RTM-100 (made by Orientec Co., Ltd., trade name, “Tensilon” is a registered trademark), according to JIS Z 0237 90 degree peeling method, One carrier metal foil was peeled off at a speed of 300 mm / min in the 90 ° direction, and then the second carrier metal foil was peeled off at a speed of 300 mm / min in the 90 ° direction.
- the peel strength after heating and pressurization (after forming the core substrate 17 by laminating the prepreg as the base material 16) was also measured in the same manner as the initial peel strength, and the rate of change relative to the initial value was obtained.
- the conditions of the heating and pressurization when laminating the multilayer metal foil 9 and the glass epoxy prepreg serving as the base material 16 to form the core substrate 17 are as follows: a pressure of 3 MPa, a temperature of 175.degree. The time is 1.5 hr.
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Abstract
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CN201180045417.4A CN103119710B (zh) | 2010-09-29 | 2011-09-29 | 半导体元件搭载用封装基板的制造方法 |
KR1020137005647A KR101466524B1 (ko) | 2010-09-29 | 2011-09-29 | 반도체소자 탑재용 패키지 기판의 제조 방법 |
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JP2011207249A JP5896200B2 (ja) | 2010-09-29 | 2011-09-22 | 半導体素子搭載用パッケージ基板の製造方法 |
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KR (1) | KR101466524B1 (fr) |
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JP5896200B2 (ja) | 2016-03-30 |
JP2012094840A (ja) | 2012-05-17 |
TW201218323A (en) | 2012-05-01 |
CN103119710A (zh) | 2013-05-22 |
CN103119710B (zh) | 2015-11-25 |
TWI601245B (zh) | 2017-10-01 |
KR101466524B1 (ko) | 2014-11-27 |
KR20130043684A (ko) | 2013-04-30 |
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