WO2004040604A1 - キャパシタ層形成用の誘電体層付銅箔並びにその誘電体層付銅箔を用いたキャパシタ層形成用の銅張積層板及びそのキャパシタ層形成用の誘電体層付銅箔の製造方法 - Google Patents
キャパシタ層形成用の誘電体層付銅箔並びにその誘電体層付銅箔を用いたキャパシタ層形成用の銅張積層板及びそのキャパシタ層形成用の誘電体層付銅箔の製造方法 Download PDFInfo
- Publication number
- WO2004040604A1 WO2004040604A1 PCT/JP2003/013818 JP0313818W WO2004040604A1 WO 2004040604 A1 WO2004040604 A1 WO 2004040604A1 JP 0313818 W JP0313818 W JP 0313818W WO 2004040604 A1 WO2004040604 A1 WO 2004040604A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- copper foil
- copper
- forming
- dielectric layer
- Prior art date
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 425
- 239000011889 copper foil Substances 0.000 title claims abstract description 358
- 239000003990 capacitor Substances 0.000 title claims abstract description 90
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 100
- 238000004544 sputter deposition Methods 0.000 claims abstract description 190
- 229920001721 polyimide Polymers 0.000 claims abstract description 108
- 238000000151 deposition Methods 0.000 claims abstract description 54
- 239000009719 polyimide resin Substances 0.000 claims abstract description 48
- 229910052809 inorganic oxide Inorganic materials 0.000 claims abstract description 42
- 230000007547 defect Effects 0.000 claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 claims description 217
- 239000002184 metal Substances 0.000 claims description 217
- 239000011230 binding agent Substances 0.000 claims description 110
- 238000002844 melting Methods 0.000 claims description 85
- 230000008018 melting Effects 0.000 claims description 80
- 239000002245 particle Substances 0.000 claims description 79
- 239000000945 filler Substances 0.000 claims description 73
- 229910052802 copper Inorganic materials 0.000 claims description 64
- 239000010949 copper Substances 0.000 claims description 64
- 238000004070 electrodeposition Methods 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 53
- 239000004642 Polyimide Substances 0.000 claims description 51
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 48
- 239000000843 powder Substances 0.000 claims description 42
- 239000003870 refractory metal Substances 0.000 claims description 36
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 26
- 229910052804 chromium Inorganic materials 0.000 claims description 26
- 239000011651 chromium Substances 0.000 claims description 26
- 229910052759 nickel Inorganic materials 0.000 claims description 24
- 238000000576 coating method Methods 0.000 claims description 23
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims description 23
- 229910001936 tantalum oxide Inorganic materials 0.000 claims description 23
- 239000011888 foil Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 15
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 13
- 229910002113 barium titanate Inorganic materials 0.000 claims description 12
- 230000001186 cumulative effect Effects 0.000 claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 238000007740 vapor deposition Methods 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 238000010191 image analysis Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 80
- 239000000243 solution Substances 0.000 description 31
- 230000008021 deposition Effects 0.000 description 24
- 230000002776 aggregation Effects 0.000 description 17
- 238000004381 surface treatment Methods 0.000 description 16
- 239000010409 thin film Substances 0.000 description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 238000005054 agglomeration Methods 0.000 description 9
- 238000004220 aggregation Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 238000005554 pickling Methods 0.000 description 9
- 229910052786 argon Inorganic materials 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910044991 metal oxide Inorganic materials 0.000 description 7
- 150000004706 metal oxides Chemical class 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000000356 contaminant Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910000531 Co alloy Inorganic materials 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- -1 argon ions Chemical class 0.000 description 4
- 229910001882 dioxygen Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007788 roughening Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 229920005575 poly(amic acid) Polymers 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 1
- 229940044175 cobalt sulfate Drugs 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
-
- 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
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/162—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed capacitors
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0154—Polyimide
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0179—Thin film deposited insulating layer, e.g. inorganic layer for printed capacitor
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0183—Dielectric layers
- H05K2201/0195—Dielectric or adhesive layers comprising a plurality of layers, e.g. in a multilayer structure
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/125—Deflectable by temperature change [e.g., thermostat element]
- Y10T428/12514—One component Cu-based
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12903—Cu-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T428/24926—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including ceramic, glass, porcelain or quartz layer
Definitions
- Copper foil with a dielectric layer for forming a capacitor layer a copper-clad laminate for forming a capacitor layer using the copper foil with a dielectric layer, and a method for producing the copper foil with a dielectric layer for forming a capacitor layer
- a capacity structure has been formed on the inner layer of printed wiring boards, especially multilayer printed wiring boards, in the same way as forming a circuit shape using a copper-clad laminate, and this is used as an embedded capacity. Things are becoming more common.
- a capacitor structure By forming a capacitor structure on the inner layer of the multilayer printed wiring board, it is possible to omit the capacitor arranged on the outer layer surface, and it is possible to miniaturize and increase the density of the outer layer circuit. The number of components has been reduced, making it easier to manufacture printed wiring boards with fine-pitch circuits.
- a thin film of tantalum oxide is formed as a dielectric layer on one side of a copper foil used as a lower electrode by a sputtering deposition method, and an upper electrode is formed directly on the dielectric layer to form a capacitor layer of a printed wiring board. It is assumed that it is used as a copper-clad laminate. In such a case, if a pit-like defect is present in the dielectric layer, the lower electrode and the upper electrode are short-circuited at the position of the pit, so that the function as a capacitor is not achieved and the product yield is reduced. It is a factor.
- FIG. 6 shows a schematic cross-sectional view of the copper foil with a dielectric layer according to the present invention.
- 2 and 6 exemplarily show a case where a copper foil with a carrier foil is used instead of the copper foil.
- Figures 7 to 22 show the variations of the copper-clad laminate for forming the capacity layer obtained using the copper foils with dielectric layers shown in Figures 1 to 6, respectively.
- FIG. 1 to 6 shows a schematic cross-sectional view of the copper foil with a dielectric layer according to the present invention.
- the present inventors have conducted intensive studies and found that the following copper foil with a dielectric layer for forming a capacitor layer and a copper-clad laminate for forming a capacitor layer using the copper foil with a dielectric layer are as shown below.
- the present inventors have conceived of a method of manufacturing a plate and a copper foil with a dielectric layer for forming the capacitor layer.
- the basic feature of the copper foil with a dielectric layer for forming a capacity layer according to the present invention is that a copper foil with a dielectric layer provided with a dielectric layer on one side of the copper foil layer, wherein the dielectric layer is a copper foil Is an inorganic oxide sputtered film having a thickness of 1.0 / m or less formed on one side of the substrate by a sputtering deposition method, and a pit-like defect generated in the inorganic oxide sputtered film is formed of a polyimide resin. Sealed. "
- Fig. 1 shows a schematic cross-sectional view of the copper foils 1A and 1A 'with a dielectric layer for forming the capacitor layer. That is, as shown in FIG. 1A, when the inorganic oxide sputtering film 3 is formed on one side of the copper foil 2, a pit-shaped defect portion 4 is generated there. Then, by sealing the pit-shaped defect portion 4 with a polyimide resin 5, a dielectric layer 6 composed of the inorganic oxide sputtering film 3 and the polyimide resin 5 is formed, and FIG. 1 (b_l) And the copper foil 1 with a dielectric layer in one of the forms shown in FIG. 1 (b-2).
- FIG. 1 shows a schematic cross-sectional view of the copper foils 1A and 1A 'with a dielectric layer for forming the capacitor layer. That is, as shown in FIG. 1A, when the inorganic oxide sputtering film 3 is formed on one side of the copper foil 2, a pit-shaped defect portion 4 is generated there. The
- FIG. 1 (b-1) shows an image in which only the pit-shaped defect portions 4 of the inorganic oxide sputtering film 3 are buried with polyimide resin 5 and sealed
- FIG. 1 (b-2) shows the polyimide.
- Resin 5 buries pit-shaped defects 4 of inorganic oxide sputter 3 and seals it, and has a thin polyimide resin layer covering the surface of inorganic oxide sputtering film 3.
- the copper foil constituting the copper foil with a dielectric layer for forming a capacitive layer according to the present invention will be described.
- the concept that can be used as copper foil includes both copper foil obtained by electrolytic method and copper foil obtained by rolling method. Further, regarding the copper foil, even if a so-called untreated copper foil that has not been subjected to any roughening treatment or anti-reflection treatment is used, the anchor effect of improving the adhesion to the dielectric layer 6 can be obtained. There is no problem with using so-called surface-treated copper foil that has been subjected to a surface treatment that appropriately combines a roughening treatment such as attaching fine copper particles for preventing There is no.
- the drawings in the present specification show a case where untreated copper foil that has not been subjected to any surface treatment is used.
- Electrolytic copper foil with carrier foil When thinning copper foil 2, copper foil with carrier foil 7 as shown in FIG. 2 (a) can be used.
- the copper foil with carrier foil 7 is a state in which the carrier foil 8 and the copper foil 2 are bonded together via the bonding interface layer 9, and when the copper foil with carrier foil 7 is used, the copper foil with carrier foil is used.
- a dielectric layer 6 is formed on the surface of the copper foil 2 of the foil 7 as shown in FIGS. 2 (b-1) and 2 (b-2), and a copper foil with a dielectric layer with a carrier foil 8 is provided. IB, 1 B '. Then, an upper electrode may be formed on the surface of the dielectric layer 6 by a method described later, and then the carrier foil may be removed.
- Copper foil provided with a binder metal layer The binder metal layer is used for improving the adhesion between the dielectric layer and the electrode forming layer. Therefore, the binder-metal layer 12 is disposed in contact with the dielectric layer 6, as is apparent from FIG. Then, a material having the best adhesion to the material used for forming the dielectric layer is appropriately and selectively used. However, the binder metal layer described here is thick If it becomes too thick, it will be difficult to remove it by etching, and it will be etched away, so it is desirable that it be as thin as possible.
- the binder metal layer 12 is a very thin metal layer having a thickness of about 30 nm to 0.5 zm, and it is also most suitable to form the binder metal layer by a dry method such as a sputtering deposition method. It is considered a way.
- the binder metal layer capable of improving the adhesion between the upper electrode forming layer and the metal oxide sputtering layer or the polyimide resin layer is made of cobalt, chromium, nickel, nickel-chromium alloy, zirconium alloy. It uses one of the following materials: palladium, molybdenum, tungsten, titanium, aluminum, and platinum.
- the binder metal layer 12 may be used in the form of a plurality of layers of any of the above-described materials in consideration of the consistency with the material of the layer to be contacted.
- FIG. 4 shows a schematic cross-sectional view of a copper foil with a dielectric layer when the high melting point metal layer 20 is provided.
- This high melting point metal layer prevents contact with the polyimide resin used in the sealing treatment described below, functions as a barrier to prevent copper from diffusing into the polyimide resin, and improves migration resistance. is there.
- nickel, chromium, molybdenum, platinum, titanium, tungsten, or an alloy thereof can be used.
- the refractory metal layer 20 only needs to function as a barrier for preventing the thermal diffusion of copper, and the thickness of the refractory metal layer 20 may be selected to be the minimum thickness that fulfills the barrier function. Although there is no particular limitation, a thickness of 20 nm or more seems to achieve the desired effect. If the thickness of the refractory metal layer 20 described above is too large, the load due to the etching process increases, so it is desirable that the thickness be as thin as possible.Thus, a thickness of 30 nm or less is adopted. It is preferable to do so.
- the components used to form the refractory metal layer and the binder metal layer described above are similar, but their thickness is different and their intended functions are also different. That is, the binder metal layer may function as an intermediate layer for improving the barrier and adhesion, but the refractory metal layer simply serves as a barrier. They differ in that they function as layers.
- Copper foil having refractory metal layer and binder metal layer: refractory metal layer and binder
- the role of the metal layer is as described above. Therefore, as shown in FIG. 5, it is possible to use a copper foil having both a low melting point metal layer and a binder metal layer. In such a case, it is a principle that different components are used for the components constituting the high melting point metal layer and the components constituting the binder metal layer. If the barrier function of the binder metal layer is not sufficient, it can be said that a high melting point metal layer is required. Components of dielectric layer>
- the inorganic oxide sputtering film 3 constituting the dielectric layer it is preferable to use one or more of aluminum oxide, tantalum oxide, and barium titanate.
- the inorganic oxide sputtering film 3 is not particularly limited as long as a metal oxide that can be used as a dielectric is used, but the uniformity of film thickness and the ease of handling when using a sputtering deposition method are considered. In consideration of the above, it is preferable to use one or more of aluminum oxide, tungsten oxide, and titanium titanate.
- the thickness of the inorganic oxide sputtering film 3 determines the thickness of the dielectric layer 6, and the final capacitance of the capacitor is Will also be decided. Therefore, the thinner the thickness, the better. However, in reality, unless the thickness is 0.1 m or more, the number of pit-like defects 4 in the inorganic oxide sputtering film 3 becomes extremely large, and the uniformity of the film thickness is increased. Is not good.
- the various conditions used in the sputtering evaporation method used here such as the degree of vacuum, target arrangement, sputter ion species, and the presence or absence of cleaning sputtering, may be arbitrarily determined in consideration of the characteristics of the apparatus. It is not a matter that needs to be limited.
- the thickness of the inorganic oxide sputtering film 3 is intended for a case where the thickness is 1.0 xm or less. This is because a pit-shaped defect portion 4 is likely to occur in the case of an inorganic oxide sputtering film of 1. ⁇ / im or less. In other words, if the thickness exceeds 1.0 m, it becomes difficult to generate the pit-shaped defect portion 4 at a level that requires sealing with polyimide resin. Furthermore, even if the polyimide resin used for sealing the pit-shaped defect portion 4 is composed of only the polyimide resin component, the dielectric filler is dispersed in the polyimide resin component. You can use the one you let them. By including the dielectric filler, it is possible to increase the dielectric constant of the dielectric layer 6 and increase the capacitance as a capacity. This dielectric filler will be described in detail in the following manufacturing method.
- Variation I A copper foil with a dielectric layer provided with a dielectric layer so as to be in direct contact with the surface of the copper foil.
- Variation II A copper foil with a dielectric layer in which a binder metal layer is provided on the surface of the copper foil and a dielectric layer is provided on the surface of the binder metal layer.
- Variation III A copper foil with a dielectric layer provided with a high melting point metal layer on the surface of the copper foil and a dielectric layer on the surface of the high melting point metal layer. This is a copper foil 1D, ID 'with a dielectric layer having a three-layer structure consisting of a melting point metal layer and a Z dielectric layer.
- Variation IV A copper foil with a dielectric layer in which a high melting point metal layer and a binder metal layer are provided on the surface of the copper foil, and a dielectric layer is provided on the surface of the binder metal layer. This is a copper foil with a dielectric layer IE, 1E 'consisting of four layers: foil layer / high melting point metal layer Z binder metal layer Z dielectric layer.
- Variation V A copper foil with a carrier foil is used instead of the above copper foil, and a copper foil with a dielectric layer 1 B, IB shown in FIG. 2 is provided with a dielectric layer on the surface of the copper foil. .
- this copper foil with a dielectric layer includes a carrier foil, it is also possible to provide a high melting point metal layer 20 and a binder metal layer 12 between the copper foil layer 2 and the dielectric layer 6. It is possible to adopt various variations as exemplified in FIG.
- the method for producing a copper foil with a dielectric layer according to the present invention basically includes the following I. and II. It goes through the process of. That is, I. An inorganic oxide sputtering film having a thickness of 1.0 m or less is formed on one surface of a copper foil by using a sputtering deposition method. II. Then, the pit-shaped defects generated in the inorganic oxide sputtered film are buried with polyimide resin and sealed by electrodeposition coating of polyimide resin.
- Manufacturing method related to copper foil The copper foil used here is not particularly limited as described above in terms of the manufacturing method, the presence or absence of roughening treatment, etc., but the binder metal layer 12 shown in FIG.
- Copper foil with dielectric layer 1C, 1C 'with a high melting point metal shown in FIG. 4 Copper foil with a dielectric layer with a layer 20, ID 1D', high melting point metal shown in FIG.
- a refractory metal layer or a binder metal layer is formed on the surface of the copper foil at this stage. Need to be kept.
- the formation of the refractory metal layer and the binder metal layer can be performed by a wet electrolytic method and an electroless method, a dry vapor deposition, a sputtering method, an ion plating method, a CVD method, or the like, depending on the components.
- the electrodeposition coating method of polyimide resin ensures that pit-like defects in the inorganic oxide sputtered film can be embedded (sealed) in complicated and fine concave shapes, and that the electrodeposition coating film of polyimide resin itself is uniform. The coating is free from defects such as pinholes.
- Polyimide resin used for sealing and sealing method In the present invention, it is preferable to use an electrodeposition polyimide method for the sealing treatment. Since the polyimide resin used in the electrodeposition polyimide method hardly dissolves in a solvent, the precursor of the polyamic acid, Electrodeposition coating was performed in this state, and the polyimide film was formed by dehydration cyclization by heating at a high temperature.
- a polyimide electrodeposition solution such as a composition for anion electrodeposition coating using a pendant carboxyl group-containing solvent-soluble multiblock polyimide. Therefore, such a kind of polyimide electrodeposition solution can be procured in the market, and some commercially available polyimide electrodeposition solutions have very excellent performance.
- the electrodeposition properties vary depending on the type of the inorganic oxide sputtering film.
- a polyimide electrodeposition solution depending on the type of the inorganic oxide sputtering film which is a coating for forming the polyimide coating.
- a polyimide film is to be formed on an inorganic oxide sputtering film by an electrodeposition coating method, as shown in Fig. 1 (b-1), a pit-like defect portion of the inorganic oxide sputtering film is formed. If only embedding is to be performed, it is considered that the smaller the colloidal particles of the multi-block polyimide in the polyimide electrodeposition solution, the better the embedding performance. It is necessary to plan. However, as shown in Fig.
- the colloidal particles of the multi-block polyimide in the polyimide electrodeposition solution must have an appropriate particle size. Also, there is a close relationship between the particle diameter of the colloidal particles of the multi-block polyimide and the thickness of the film that can be formed. Therefore, taking these facts into consideration, when manufacturing the copper foil 1A ', IB', 1C, ID ', 1E, with a dielectric layer shown in Fig. 1 (b-2), etc. In other words, it is necessary to adjust the diameter of the colloid particles in the polyimide electrodeposition solution to an appropriate range in which the desired balance with the target polyimide film thickness, uniform electrodeposition property and embedding property can be maintained.
- a dielectric filler-containing polyimide electrodeposition liquid in which a dielectric filler is contained in the polyimide electrodeposition liquid can be used.
- the copper foil with dielectric layer 1A, 1B, 1C, ID, IE shown in Fig. 1 (b-1) In such a case, the dielectric filler does not necessarily have to enter the pit-shaped defect portion, and the dielectric layer shown in each of FIGS. 1 to 3 (b-2) in which the polyimide resin is a thin layer is not particularly necessary.
- average particle diameter D IA is from 0.05 to 1 a O m
- the mass accumulated by a laser diffraction scattering particle size distribution measurement method a particle size D s Q is 0. 1 ⁇ 2. 0 / X m, and is represented by DsoZD! a with an average particle diameter D IA obtained by a mass accumulated particle diameter D'5. and image analysis
- a “dielectric powder having a substantially spherical bevelskite structure” having a cohesion value of 4.5 or less.
- the solution properties of the polyimide electrolytic solution should be determined in consideration of the dispersibility of the dielectric filter dispersed and mixed in the polyimide electrolytic solution.
- the type of polyimide electrodeposition solution containing multiblock polyimide that can form a uniform polyimide film without defects, and the range of preparation of the composition is also limited. is there.
- the inventors of the present invention have improved the powder properties of the dielectric filler to ensure good dispersibility of the dielectric filler powder in the polyimide electrodeposition solution.
- the dielectric filler used in the present invention is dispersed and present in the dielectric filler-containing polyimide film.
- the dielectric filler finally functions as a dielectric layer of the capacitor and is formed into a capacitor when processed into a capacitor shape. It is used to increase the electricity capacity in the evening.
- This dielectric filler includes B aT i ⁇ 3 , S rT i OP b (Z r — T i) Os (commonly known as P ZT), PbL aT i Oa ⁇ PbL aZ rO (commonly known as P LZT), S r B i is to use a dielectric powder 2 Ta 2 ⁇ 9 (aka SBT) double coupling oxide having a perovskite structure, such as.
- the powder characteristics of the dielectric filler must have a particle size in the range of 0.05 to 1.0 ⁇ m.
- the particle size referred to here is an indirect value such as estimating the average particle size from the measured values of the laser diffraction scattering particle size distribution measurement method, BET method, etc., because the particles form a certain secondary aggregation state. Measurement cannot be used due to inferior accuracy, and dielectric filler is directly observed with a scanning electron microscope (SEM) The mean particle size obtained by image analysis of the SEM image. In this specification, the particle size at this time is indicated as DIA .
- the image analysis of the dielectric filler powder observed using a scanning electron microscope (SEM) in the present specification was performed using a circular threshold using an IP-1000 PC manufactured by Asahi Engineering Co., Ltd. Circular particle analysis was performed with a value of 10 and a degree of overlap of 20, and the average particle diameter DIA was determined. Further, the mass cumulative particle diameter D 5 by a laser diffraction scattering type particle size distribution measuring method. There 0. 1 2. a 0 xm, and the mass cumulative particle diameter D 5. D 5 with an average particle diameter D IA obtained by an image analysis. / Value of cohesion represented by D IA is it is required that a dielectric powder having a perovskite structure having a substantially shape spherical is 4.5 or less.
- Mass cumulative particle diameter D 5 by a laser diffraction scattering particle size distribution measuring method Is the particle size at 50% of the cumulative mass obtained by using the laser single scattering particle size distribution measurement method.
- the dielectric layer of the double-sided copper-clad laminate used to form the built-in capacity layer is usually 10 Am to 25 / xm in thickness. Since 2.0 Aim is the upper limit for,
- the dielectric filler powder is mixed and dispersed in Mechiruechi ketone, the solution a laser diffraction scattering particle size distribution measuring device M icro T rac HRA 9320- X 100 type (manufactured by Nikkiso Co., Ltd. Was put into the circulator and the measurement was performed.
- the cumulative mass particle diameter D 5 obtained by using a laser diffraction-scattering particle size distribution measuring method Values are not truly direct observations of individual particle diameters. You. This is because most of the particles constituting the dielectric powder are not so-called monodispersed powders in which individual particles are completely separated, but a state in which a plurality of particles are aggregated and aggregated. This is because the laser diffraction scattering type particle size distribution measurement method regards the agglomerated particles as one particle (agglomerated particles) and calculates the mass cumulative particle size.
- the average particle diameter D IA obtained by image processing the image of the dielectric powder observed using a scanning electron microscope is obtained directly from the SEM observation image. This means that they can be reliably captured, but on the other hand, they do not reflect the existence of the agglomeration state of the particles at all.
- the present inventors have determined that the cumulative mass particle size D5 of the laser diffraction / scattering particle size distribution measuring method.
- the value calculated by D 5 Q / D IA was determined as the degree of aggregation. That is, D 5 in the same lot of copper powder.
- D 5 to be reflected in the measured values that the aggregation state. Is likely to be greater than the value of DIA (similar results can be obtained in actual measurements).
- D 5 Values, if at all there is no granular state of aggregation of the dielectric filler powder, Yuki approaching the value of the infinitely D IA, D 5 is a degree of aggregation.
- the value of ZD IA will be close to 1. At the stage when the degree of agglomeration reaches 1, it can be said that this is a monodispersed powder in which the state of agglomeration of the powder particles has completely disappeared. However, in reality, the cohesion degree may show a value of less than 1. It is theoretically considered that in the case of a true sphere, the value does not become less than 1, but in reality, it seems that since the powder is not a true sphere, a value of less than 1 is obtained. is there.
- the dielectric filler powder is required to have an agglomeration degree of 4.5 or less. If the agglomeration degree exceeds 4.5, the level of agglomeration between the powder particles of the dielectric filler becomes too high, and it becomes difficult to uniformly mix the above-mentioned polyimide electrodeposition liquid.
- the dielectric filler powder which does not satisfy the above condition may be generated.
- the hydrothermal synthesis method which is a wet method
- formation of an aggregated state tends to occur easily. Therefore, by performing a deagglomeration process of separating the aggregated powder into individual particles, it is possible to set the aggregation state of the dielectric filler powder within the above-described aggregation degree. It is possible.
- the purpose is simply to perform the pulverization work, as a means to perform the pulverization, high-energy ball mill, high-speed conductor impingement type air flow type pulverizer, impact type pulverizer, gauge mill, medium stirring type mill, high water pressure It is possible to use various things such as a pulverizer.
- a pulverizer in order to ensure the mixability and dispersibility of the dielectric filler powder and the polyimide electrodeposition solution, it is necessary to consider the reduction in viscosity of the dielectric filler-containing polyimide electrodeposition solution described below. In order to reduce the viscosity of the dielectric filler-containing polyimide electrodeposition liquid, it is required that the specific surface area of the powder particles of the dielectric filler is small and smooth.
- the crushing method must not damage the surface of the granules during crushing and increase the specific surface area.
- the present inventors have conducted intensive studies and found that two methods are effective. What is common to these two methods is that it minimizes the contact between the particles of the dielectric filler powder and the parts such as the inner wall of the device, the stirring blades, and the crushing media.
- This is a method that can be sufficiently disaggregated by causing mutual collision. In other words, contact with the inner wall of the device, agitating blades, crushing media, etc. will damage the surface of the granules, increase the surface roughness, degrade the sphericity, and prevent it. is there. Then, by causing sufficient collision between the particles, it is possible to break down the particles in the agglomerated state and, at the same time, adopt a method capable of smoothing the surface of the particles due to the collision between the particles. is there.
- jet mill means using a high-speed airflow of air to put the dielectric filler powder into this airflow and cause the particles to collide with each other in this high-speed airflow to perform the pulverization work. is there.
- the slurry in which the dielectric filler powder in the agglomerated state is dispersed in a solvent that does not destroy its stoichiometry is subjected to deagglomeration using a fluid mill utilizing centrifugal force.
- a fluid mill using centrifugal force By using the “fluid mill using centrifugal force” here, The slurry is caused to flow at a high speed so as to follow a circular orbit, and powder particles agglomerated by centrifugal force generated at this time are caused to collide with each other in a solvent to perform a pulverizing operation. In this way, the slurry that has been pulverized is washed, filtered, and dried to obtain a dielectric filler powder that has been pulverized.
- the coagulation degree can be adjusted and the powder surface of the dielectric filler powder can be smoothed.
- a high-speed rotating thin film method which is a kind of wet disperser.
- This high-speed rotating thin-film method will be briefly described.
- the apparatus used in this method is a stirring apparatus having a stirring blade having a diameter substantially equal to the inner wall inside a cylindrical stirring tank, and a raw material slurry (in the present invention, “dielectric filler is dispersed”). Solvent)) and the stirring blades are rotated at high speed to create a cyclone flow, and the raw material slurry starts rotating, and the raw material slurry forms a rotating thin film along the inner wall surface of the stirring tank. .
- the revolving thin film is pressed against the inner wall of the container by receiving a large force due to the acceleration due to the centrifugal force, so that the particles of the dielectric filler roll on the inner wall surface of the container and disperse so that the particles are released from the surface of the aggregated particles. Processing becomes possible. In such a case, since the particles do not collide with the inner wall surface but come into contact with each other while rolling, damage to the surface of the particles is unlikely to occur, and the specific surface area of the particles does not increase. The surface smoothing effect can be expected.
- the effect of using the high-speed swirling thin-film method is as follows: a dispersion effect of eliminating the agglomeration state of the powder particles of the dielectric filler; an effect of sharpening the particle size distribution of the dielectric filler; Re-aggregation, which is often seen, is less likely to occur. As described above, the dispersibility of the dielectric filter can be improved.
- the above-described polyimide electrodeposition liquid and the dielectric filler are mixed to form a dielectric filler-containing polyimide electrodeposition liquid.
- the compounding ratio of the polyimide electrodeposition liquid and the dielectric filler was such that the content of the dielectric filler in the dielectric filler-containing polyimide electrodeposition liquid was 75 wt. % To 9 O wt%. If the content of the dielectric filler is less than 75 wt%, the effect of improving the dielectric constant when forming the capacity cannot be obtained, and the content of the dielectric filler is 90 wt%.
- dielectric filler-containing polyimide coating the content of the polyimide resin in the polyimide coating containing the dielectric filler to be formed (hereinafter referred to as “dielectric filler-containing polyimide coating”) becomes too low, and the dielectric filler-containing polyimide coating is formed.
- the material itself becomes brittle, and the strength of the dielectric layer decreases.
- barium titanate among composite oxides having a perovskite structure in consideration of the production accuracy as a powder at this stage.
- either calcined barium titanate or uncalcined barium titanate can be used for the dielectric film.
- calcined barium titanate it is preferable to use calcined barium titanate, but it is only necessary to select and use it according to the design quality of the capacity.
- the dielectric filler of barium titanate has a cubic crystal structure.
- Barium titanate has a cubic crystal structure and a tetragonal crystal structure, but a barium titanate dielectric filter having a cubic crystal structure is more likely to have a barium titanate structure having only a tetragonal structure.
- the value of the dielectric constant of the finally obtained dielectric layer is stabilized. Therefore, it can be said that it is necessary to use at least barium titanate powder having both cubic and tetragonal crystal structures.
- a dielectric filler-containing polyimide film is formed on the surface of the metal oxide sputtering film by an electrodeposition coating method, so that the dielectric filler-containing polyimide film is contained.
- the dielectric filler is uniformly dispersed without uneven distribution, and the polyimide film containing the dielectric filler itself has a smooth surface and a uniform film thickness, and is free from defects. is there.
- the copper-clad laminate for forming a capacitor layer according to the present invention relates to the above-described present invention.
- the copper foil layer of the copper foil with a dielectric layer is used as the lower electrode forming layer, and the upper electrode forming layer is provided on the dielectric layer.
- It is a copper-clad laminate having a basic layer configuration.
- FIG. 7 shows a schematic cross section of the copper clad laminate 1 OA, 1 OA ′ having this basic layer configuration.
- the term copper-clad laminate is used because a copper layer using copper foil is present on at least one surface, and the upper electrode forming layer 11 is not necessarily a layer formed of copper. There is no need to be.
- the upper electrode forming layer 11 uses any one of components of copper, aluminum, silver, and gold. Although it is conceivable to use other metal materials, at this stage, in consideration of the configurations shown in FIGS. 1 (b-1) and 1 (b-2), the upper electrode forming layer 11 is made of metal oxide. It is desirable to use a metal material that has excellent adhesion to both the sputter layer and the polyimide resin layer, and copper, aluminum, silver, and gold are excellent as those that meet these requirements and have excellent electrical characteristics. -ing
- copper can be formed by an electroless plating method or a method of laminating copper foil, but regardless of which metal material is used, a sputtering evaporation method is used. It is preferable that the substrate be manufactured in a dry manner by using a material from the viewpoint of keeping the thickness of the dielectric layer uniform.
- the high melting point metal layer and the binder metal layer described in the above description regarding the copper foil with the dielectric layer can be provided between the upper electrode forming layer 11 and the dielectric layer 6. . Therefore, the copper-clad laminate for forming the capacity layer according to the present invention has the following variations.
- the description and functions of the refractory metal layer and the binder metal layer are the same as those described above for the copper foil with the dielectric layer, and therefore, the following description will be omitted to avoid redundant description. I do.
- Variation 1 Using a copper foil with a dielectric layer provided with a dielectric layer so as to be in direct contact with the surface of the copper foil used as the lower electrode, as shown in Fig. 7, the lower electrode forming layer Z and the dielectric layer Z This is a copper-clad laminate 1 OA, 10 A ′ for forming a capacitor layer having a three-layer configuration of an upper electrode forming layer.
- Variation 2 Using a copper foil with a dielectric layer provided with a dielectric layer so as to be in direct contact with the surface of the copper foil used as the lower electrode, the lower electrode forming layer
- Variation 3 Using a copper foil with a dielectric layer provided with a dielectric layer to directly contact the surface of the copper foil used as the lower electrode, as shown in Fig. 9, the lower electrode forming layer / dielectric layer These are copper-clad laminates 10 C and 10 C for forming a capacity layer having a four-layer structure of a Z refractory metal layer and an upper electrode formation layer.
- Variation 4 Using a copper foil with a dielectric layer provided with a dielectric layer so as to be in direct contact with the surface of the copper foil used as the lower electrode, the lower electrode forming layer Z dielectric layer as shown in Fig. 10
- the copper-clad laminates 10D and 10D 'for forming the capacity layer have a five-layer structure of a binder-metal layer Z, a high-melting-point metal layer Z, and an upper-electrode-forming layer.
- Variation 5 Using a copper foil with a dielectric layer provided with a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 11, lower electrode forming layer Z binder metal layer Z
- the copper-clad laminates 10E and 10E 'for forming a capacitor layer having a four-layer structure of a dielectric layer Z and an upper electrode forming layer were used.
- Variation 6 Using a copper foil with a dielectric layer provided with a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 12, lower electrode forming layer / binder metal layer A copper-clad laminate 10 F, 10 F ′ for forming a capacity layer having a five-layer structure of a / dielectric layer / binder metal layer Z upper electrode forming layer.
- Variation 7 Using a copper foil with a dielectric layer provided with a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 13, lower electrode forming layer / binder metal layer / Dielectric layer / Refractory metal layer Z Copper-clad laminates 10G and 10G 'for forming a capacity layer having a five-layer structure of an upper electrode forming layer.
- Variation 8 Using a copper foil with a dielectric layer provided with a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 14, lower electrode forming layer / binder metal layer Z dielectric layer Binder metal layer Refractory metal layer Z Copper-clad laminate 1 OH, 10 H 'for forming a capacity layer having a six-layer structure consisting of a Z upper electrode layer.
- Variation 9 Using a copper foil with a dielectric layer provided with a high melting point metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 15, lower electrode forming layer / high melting point metal These are copper-clad laminates 10i, 10i for forming a capacitor layer having a four-layer structure of a layer / dielectric layer / upper electrode formation layer.
- Variation 10 Using a copper foil with a dielectric layer provided with a high melting point metal layer between the copper foil used as the lower electrode and the dielectric layer, the lower electrode formation layer Z height as shown in Fig. 16 A copper-clad laminate for forming a capacitive layer having a five-layer structure of a melting point metal layer / dielectric layer, a Z binder metal layer, and an upper electrode forming layer was formed as a copper-clad laminate ⁇ 10 J, 10 J ′.
- Variation 11 1 Using a copper foil with a dielectric layer with a high melting point metal layer provided between the copper foil used as the lower electrode and the dielectric layer, a lower electrode forming layer as shown in Fig. 17 Z High-melting-point metal layer / dielectric layer Z High-melting-point metal layer Z Copper-clad laminate 10 K, 1 OK ′ for forming a capacitor layer having a five-layer structure consisting of an upper electrode forming layer.
- Variation 1 2 Using a copper foil with a dielectric layer with a high melting point metal layer provided between the copper foil used as the lower electrode and the dielectric layer, the lower electrode forming layer Z height as shown in Fig. 18 Melting point metal layer Z Dielectric layer Z Binder metal layer Z High melting point metal layer Z Copper-clad laminates 10 L and 10 L 'for forming a capacity layer having a six-layer structure consisting of an upper electrode forming layer. .
- Variation 13 Using a copper foil with a dielectric layer provided with a high melting point metal layer and a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 19, Forming layer Z High melting point metal layer Z Binder metal layer Z Dielectric layer / upper electrode forming Copper clad laminates 10 M and 10 M 'for forming a capacity layer having a five-layer structure.
- Variation 14 Using a copper foil with a dielectric layer provided with a refractory metal layer and a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in FIG. Forming layer Z High melting point metal layer Nobinder one metal layer / Dielectric layer Z Binder metal layer Z Copper-clad laminate 10 N, 1 ON 'for forming capacitor layer with 6 layers of upper electrode forming layer is there.
- Variation 15 Using a copper foil with a dielectric layer provided with a high melting point metal layer and a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Fig. 21 A copper-clad laminate for forming a capacitor layer having a six-layer structure consisting of a lower electrode forming layer / high melting point metal layer / binder monometal layer / dielectric layer / high melting point metal layer / upper electrode forming layer 10 P, 1 0 P '.
- Variation 16 Using a copper foil with a dielectric layer provided with a high melting point metal layer and a binder metal layer between the copper foil used as the lower electrode and the dielectric layer, as shown in Figure 22 Forming layer Z High melting point metal layer Z Binder single metal layer / Dielectric layer / Binder metal layer / High melting point metal layer Z Copper-clad laminate for forming a capacitor layer with 7 layers of upper electrode forming layer 10 Q, 1 0 Q '.
- the copper foil with a dielectric layer according to the present invention is buried by the polyimide resin having pit-like defects generated in the sputtering film even when a metal oxide sputtered film having a high dielectric constant is used for the dielectric layer. Therefore, a short circuit between the upper electrode and the lower electrode of the capacitance circuit obtained by using the copper foil with the dielectric layer can be completely prevented.
- the polyimide resin film covers the metal oxide sputtering film, it is possible to prevent the metal oxide sputtering film constituting the dielectric layer from being damaged.
- the copper-clad laminate for forming the capacitor layer manufactured using this copper foil with a dielectric layer has a thin and uniform thickness of the dielectric layer and is effective in generating a short circuit between the lower electrode and the upper electrode. Can be prevented. Therefore, it has a high dielectric constant, can improve the capacitance as a capacitor, and has few defects, so that the quality stability when a capacitor circuit is formed is remarkably improved.
- the above-mentioned high melting point metal layer is present, migration resistance is excellent, and the presence of the binder metal layer improves the adhesion between the dielectric layer and the electrode forming layer.
- the copper foil 1A ′ with a dielectric layer shown in FIG. 1 (b-2) was manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG. A copper clad laminate 1 OA 'for production was produced.
- the copper foil 2 to be the lower electrode forming layer a non-surface-treated, low-profile (VLP) copper foil having a nominal thickness of 18 m was used.
- VLP low-profile
- the surface of a copper foil of 7 Omm ⁇ 7 Omm size was pickled with a 2 N sulfuric acid solution (room temperature) to remove contaminants and excess oxides, and dried. Then, the copper foil that had been subjected to the pickling treatment was placed in a chamber of a sputtering deposition apparatus (CFS-12P-100). Sputtering conditions are as follows.
- oxygen gas is slowly leaked into the chamber of the sputtering deposition apparatus at a flow rate of 29 cm 3 / min, using a tantalum sunset target as a target and a sputtering power of 1500 W, With a press pad time of 8 min. And a sputtering time of 749.6 min., A tantalum oxide film as an inorganic oxide sputter film having a thickness of about 1.0 / xm was formed on the surface of the copper foil.
- the copper foil having the tantalum oxide film formed on one side was taken out of the chamber of the sputtering evaporation apparatus, and the pit-like defect portion of the tantalum oxide film was sealed with a polyimide resin.
- a polyimide electrodeposition solution GNW-100 manufactured by PI Technology Research Institute Co., Ltd. was used as the polyimide electrodeposition solution. Using this polyimide electrodeposition solution, pit-like defects of the tantalum oxide film were buried, and a polyimide resin film was formed on the surface.
- the electrodeposition conditions at this time were as follows: the temperature of the polyimide electrodeposition solution was 25 ° C, the copper foil 2 on which the tantalum oxide film was formed was the anode, the stainless steel plate was the cathode, and a direct voltage of 15 V was applied. Then, the polyimide resin is electrodeposited by electrolysis for 5 minutes to bury the pit-like defect portion of the tantalum oxide film, and to form a polyimide resin film having a thickness of about 0. 0 on the surface thereof.
- the surface of the dielectric layer 6 is formed by sputtering evaporation on the surface of the dielectric layer 6 to a thickness of 0.6 m to become the upper electrode forming layer 11. A copper layer was formed.
- the sputtering deposition apparatus and basic sputtering conditions used at this time are the same as described above, but cleaning by reverse sputtering was omitted. Then, using a copper target as the target placed in the chamber of the sputtering deposition apparatus, press-packing (press-press power 1000 W, press-pump time 10 min.) was performed, and the film forming sputter (sputter power) was performed. At 300 W, a sputter time of 9. lm in.), A copper layer serving as an upper electrode forming layer 11 having a thickness of about 0.5 m was formed on the surface of the dielectric layer 6.
- the copper foil 1A 'with a dielectric layer shown in FIG. 1 (b-2) is manufactured according to the manufacturing flow shown below, and is used to form the capacitor layer shown in FIG. 8 (b).
- a copper-clad laminate 10 B 'for production was produced.
- the copper foil 2 to be the lower electrode forming layer a non-surface-treated, low-profile (VLP) copper foil having a nominal thickness of 18 m was used. Manufacturing of copper foil with dielectric layer>
- the production of the copper foil 1A 'with a dielectric layer shown in FIG. 1 (b-2) is the same as that of the first embodiment, and therefore, the description is omitted here to avoid duplicating description.
- a binder-metal layer 12 was formed on the surface of the dielectric layer 6 by a sputtering deposition method.
- This binder metal layer 12 was formed using a sputtering deposition method.
- the sputtering apparatus and the basic sputtering conditions used at this time were such that cleaning by reverse sputtering was not performed as in the case of forming the upper electrode forming layer 11 of Example 1.
- a press sputtering (press power 2000 W, press sputtering time 8 min.) was performed, and a film forming sputtering (sputter power 2000 W) was performed.
- the sputtering time was 1.3 min.
- a chromium layer having a thickness of about 30 nm was formed on the surface of the dielectric layer 6.
- a 0.5-m-thick copper layer serving as the upper electrode forming layer 11 was formed by using the same sputtering method as in Example 1.
- the copper-clad laminate for forming the four-layer capacity layer shown in FIG. 8 (b), ie, the lower electrode forming layer 2 / dielectric layer 6Z binder metal layer 12 / upper electrode forming layer 11 I got 10 B '.
- the state of the copper-clad laminate thus manufactured it was examined whether or not a short circuit occurred between the copper foil 2 as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. I could't find what happened.
- the copper foil 1A 'with a dielectric layer shown in FIG. 1 (b-2) is manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG. 9 (b) is formed using the same.
- a copper-clad laminate 10 C ′ for use was manufactured.
- a copper foil 2 having a nominal thickness of 18 and having not been subjected to surface treatment was used as the copper foil 2 serving as the lower electrode forming layer. Manufacturing of copper foil with dielectric layer>
- the production of the copper foil 1A 'with a dielectric layer shown in FIG. 1 (b-2) is the same as that of the first embodiment, and therefore, the description is omitted here to avoid duplicating description.
- a high melting point metal layer 20 was formed on the surface of the dielectric layer 6 by a sputtering deposition method.
- This high melting point metal layer 20 was formed using a sputtering deposition method.
- the sputtering apparatus and the basic sputtering conditions used at this time were such that cleaning by reverse sputtering as in the case of forming the upper electrode forming layer 11 of Example 1 was omitted, and the sputtering apparatus was used.
- Pre-sputtering (pre-sputtering power: 2000 W, pre-sputtering time: 5 min) was performed using Nigger-Nuget, which was placed in the chamber, and film forming sputters (sputtering power: 2000 W, sputter time) 1.5 min.) To form a nickel layer with a thickness of about 30 nm on the surface of the dielectric layer 6. did.
- a copper layer having a thickness of 0.5 m to be the upper electrode forming layer 11 was formed by using the same sputtering method as in Example 1.
- the copper clad laminate 10 C for forming the four-layer capacity layer of the lower electrode forming layer 2 / dielectric layer 6 / high melting point metal layer 20Z upper electrode forming layer 11 shown in FIG. I got it.
- the state of the copper-clad laminate thus manufactured it was examined whether or not a short circuit occurred between the copper foil 2 as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. I could't find the place where it happened.
- a copper foil 1A ′ with a dielectric layer shown in FIG. 1 (b_2) was manufactured according to the manufacturing flow shown below, and was used to form a capacitor layer shown in FIG. 10 (b).
- a copper-clad laminate 10D ' was manufactured.
- a copper foil 2 having a nominal thickness of 18 m and having not been subjected to a surface treatment was used as the copper foil 2 serving as the lower electrode forming layer.
- the production of the copper foil 1A 'with a dielectric layer shown in FIG. 1 (b-2) is the same as that of the first embodiment, so that the description is omitted here to avoid duplication.
- the surface of the dielectric layer 6 was sputter-deposited using a sputtering method in the same manner as in Example 2 to form a binder metal layer 12 having a thickness of 30 nm.
- a chromium layer was formed.
- a nickel layer having a thickness of 50 nm was formed as the high melting point metal layer 20 in the same manner as in Example 3. Further, a copper layer having a thickness of 0.5 / m to be the upper electrode forming layer 11 was formed on the refractory metal layer 20 by using the same sputtering method as in Example 1. Thus, the lower electrode forming layer 2 / dielectric layer 6 / binder metal layer 12 refractory metal layer 20Z upper electrode forming layer 11 shown in FIG. 10 (b) Thus, a copper-clad laminate 10D ′ was obtained. In the state of the copper-clad laminate thus manufactured, it was examined whether or not a short circuit occurred between the copper foil 2 as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. I could't find out where it happened.
- the copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) is manufactured according to the manufacturing flow shown below, and the capacitor shown in FIG. A copper-clad laminate 10E 'for forming a layer was manufactured.
- a copper foil 2 having a nominal thickness of 18 and having not been subjected to surface treatment was used as the copper foil 2 to be the lower electrode forming layer.
- the surface of a copper foil having a size of 70 mm ⁇ 70 mm was pickled with a 2N sulfuric acid solution (room temperature) to remove contaminants and excess oxides, and dried. Then, the copper foil that had been subjected to the pickling treatment was placed in a chamber of a sputtering deposition apparatus (CFS-12P-100). The sputtering conditions, the inside of the chamber one as ultimate vacuum 1. 2 X 1 0 one 3 P a, was set to supply argon gas at a flow rate of 87 CMVM in the ion gun. Then, the surface of the copper foil, which had been subjected to the pickling treatment, was cleaned by reverse sputtering with argon ions. The reverse sputtering conditions were as follows: reverse sputtering power 1 000 W, reverse sputtering time 1 Omin.
- a chromium target is used as the target placed in the chamber of the sputtering ring vapor deposition apparatus, and the press sputtering is performed. 1000 W of power, 5 min. In press time, and sputter deposition (2000 W, 1.3 m in time), about 30 nm thick on the surface of copper foil 2 was formed as the binder metal layer 12.
- a tantalum oxide film as an inorganic oxide sputtered film having a thickness of about 1.0 im was formed on the surface of the binder-metal layer 12.
- the copper foil having the binder metal layer 12 and the tantalum oxide film formed on one side is taken out of the chamber of the sputtering deposition apparatus, and the pit-like defect portion of the tantalum oxide film is sealed with a polyimide resin. Performed in the same manner as 1. Thus, a copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) was obtained.
- the surface of the dielectric layer 6 is formed by sputtering deposition on the surface of the dielectric layer 6 into a 0.5- A copper layer was formed.
- the sputtering deposition apparatus and basic sputtering conditions used here are the same as in Example 1.
- the copper-clad laminate 10 for forming the four capacitor layers of the lower electrode forming layer 2 / binder metal layer 12 / dielectric layer 6 / upper electrode forming layer 11 shown in FIG. I got E '.
- FIG. 3 (b-2) the process shown in FIG. 3 (b-2) was performed according to the manufacturing flow shown below.
- a copper foil 1 C ′ with a dielectric layer was manufactured, and a copper-clad laminate 10 F ′ for forming a capacitor layer shown in FIG. 12 (b) was manufactured using the same.
- a copper foil 2 having a nominal thickness of 18 im and not subjected to surface treatment and having a nominal thickness of 18 im was used as the copper foil 2 serving as the lower electrode forming layer.
- the production of the copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) is the same as that of the fifth embodiment, so that the description is omitted here to avoid duplication.
- a binder metal layer 12 was formed on the surface of the dielectric layer 6 by a sputtering deposition method.
- This binder metal layer 12 formed a chromium layer having a thickness of about 30 nm on the surface of the dielectric layer 6 in the same manner as in Example 2.
- a copper layer having a thickness of 1.0 Aim to be the upper electrode forming layer 11 was formed by using the same sputtering method as in Example 1.
- a copper-clad laminate 10 F ′ was obtained.
- the copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) was manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG.
- a copper clad laminate 10 G 'for forming was produced.
- the copper foil 2 serving as the lower electrode forming layer a veri-buccal-profile (VLP) copper foil having a nominal thickness of 18 m and not subjected to surface treatment was used.
- VLP veri-buccal-profile
- the production of the copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) is the same as that of the fifth embodiment, so that the description is omitted here to avoid duplication.
- a high melting point metal layer 20 was formed on the surface of the dielectric layer 6 by a sputtering deposition method.
- This high melting point metal layer 20 was formed using a sputtering deposition method.
- the sputtering apparatus and the basic sputtering conditions used at this time were such that cleaning by reverse sputtering as in the case of forming the upper electrode forming layer 11 of Example 1 was omitted, and the sputtering apparatus was used.
- press-pressing press-press power 2000 W, pre-sputtering time 5 min
- film forming sputtering sputtering power 2000 W, sputtering time 1.5 min
- Example 8 On the nickel layer formed as the high melting point metal layer 20, a copper layer having a thickness of 1.0 m to be the upper electrode forming layer 11 was formed by the same sputtering method as in Example 1. Thus, the lower electrode forming layer 2 binder-metal layer 12 / dielectric layer 6Z refractory metal layer 20Z upper electrode forming layer 11 shown in FIG. A copper clad laminate 10G 'was obtained. In the state of the copper-clad laminate thus manufactured, it was examined whether or not a short circuit occurred between the copper foil 2 as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. I could't find out what happened. [Example 8]
- the copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) is manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG. A copper-clad laminate 10H 'for forming was produced.
- a copper foil 2 having a nominal thickness of 18 and having not been subjected to surface treatment was used as the copper foil 2 to be the lower electrode forming layer. Manufacturing of copper foil with dielectric layer>
- the production of the copper foil 1 C ′ with a dielectric layer shown in FIG. 3 (b-2) is the same as that of the fifth embodiment, so that the description is omitted here to avoid duplication.
- the surface of the dielectric layer 6 is formed by sputtering vapor deposition, and the sputtering method is used in the same manner as in Example 2 to form a binder metal layer 12 having a thickness of 30 nm. Was formed.
- Example 3 a 30-nm-thick nickel layer was formed as the high-melting-point metal layer 20 on the chromium layer formed as the binder metal layer 12 in the same manner as in Example 3. Further, a copper layer having a thickness of 0.5 zm to be the upper electrode forming layer 11 was formed on the refractory metal layer 20 by using the same sputtering method as in Example 1. In this way, the lower electrode forming layer 2 Z binder metal layer 12 Z dielectric layer 6 Z binder metal layer 12 Z high melting point metal layer 20 / upper electrode forming layer 11 shown in FIG. Thus, a copper-clad laminate 10H 'for forming a capacitor layer was obtained.
- the copper foil 1D ′ with a dielectric layer shown in FIG. 4 (b-2) was manufactured according to the manufacturing flow shown below, and was used to form the capacitor layer shown in FIG. 15 (b).
- a copper-clad laminate 10 i ′ was used as the copper foil 2 serving as the lower electrode forming layer.
- the surface of a copper foil having a size of 70 mm ⁇ 70 mm was pickled with a 2.N sulfuric acid solution (room temperature) to remove contaminants and excess oxides, and dried. Then, the copper foil that had been subjected to the pickling treatment was placed in a chamber of a sputtering deposition apparatus (CFS-12P-100). The sputtering conditions, the inside of the chamber one as ultimate vacuum 1. 2X 1 0 one 3 P a, was set to supply argon gas at a flow rate of 87 CMVM in the ion gun. Then, the surface of the copper foil, which had been subjected to the pickling treatment, was cleaned by reverse sputtering with argon ions. The reverse spatter conditions were set to 1000 W of reverse sputter power and 1 Omin.
- a nickel target is used as the target placed in the chamber of the sputtering deposition apparatus, and a press sputtering (press power 2000 W, pre-sputtering time 5 min.) Is performed.
- a nickel layer was formed on the surface of the dielectric layer 6 as a refractory metal layer 20 having a thickness of about 30 nm on the surface of the dielectric layer 6 by performing film sputtering (sputtering power 2000 W, spatter time 1.5 min.).
- a tantalum target was used as the target, with a sputtering power of 1500 W, a press pad time of 8 min.
- a tantalum oxide film as an inorganic oxide sputtering film having a thickness of about 1.0 was formed on the surface of the refractory metal layer 20.
- the copper foil having the refractory metal layer 20 and the tantalum oxide film formed on one side is taken out of the chamber 1 of the sputtering deposition apparatus, and the tantalum oxide film is formed.
- the pit-like defect was sealed with a polyimide resin in the same manner as in Example 1.
- a copper foil 1D 'with a dielectric layer shown in FIG. 3 (b-2) was obtained.
- the upper electrode forming layer 11 is formed to a thickness of 0.5 ⁇ m on the surface of the dielectric layer 6 by using a sputtering deposition method.
- a copper layer was formed.
- the sputtering deposition apparatus and basic sputtering conditions used here are the same as in Example 1.
- the copper-clad laminate 1 for forming the four-capacity layer, the lower electrode forming layer 2 the high-melting point metal layer 20 the Z dielectric layer 6 the Z upper electrode forming layer 11 shown in FIG. We got 0 i '.
- the copper foil 1D 'with a dielectric layer shown in FIG. 4 (b-2) is manufactured according to the manufacturing flow shown below, and is used to form the capacitor layer shown in FIG. 16 (b).
- a copper-clad laminate 10 J ′ was manufactured.
- a copper foil 2 having a nominal thickness of 18 m and having not been subjected to surface treatment was used as the copper foil 2 serving as the lower electrode forming layer. Manufacturing of copper foil with dielectric layer>
- the production of the copper foil 1D 'with a dielectric layer shown in FIG. 4 (b-2) is the same as that of the ninth embodiment, and therefore, description thereof is omitted here to avoid duplication.
- Manufacture of copper-clad laminates for forming sieve layers> Using the dielectric layer-attached copper foil 1D 'obtained as described above, a binder-metal layer 12 was formed on the surface of the dielectric layer 6 by a sputtering deposition method. This binder-metal layer 12 formed a chromium layer having a thickness of about 30 ⁇ m on the surface of the dielectric layer 6 in the same manner as in Example 2.
- a 0.5-m-thick copper layer serving as the upper electrode forming layer 11 was formed by using the same sputtering method as in Example 1.
- a copper-clad laminate 10 J ' was obtained.
- the copper foil 1D 'with a dielectric layer shown in FIG. 4 (b-2) was manufactured according to the manufacturing flow not described below, and the capacity shown in FIG. A copper-clad laminate 10K 'for forming a layer was produced.
- a copper foil 2 having a nominal thickness of 18 and having not been subjected to surface treatment was used as the copper foil 2 serving as the lower electrode forming layer. Manufacturing of copper foil with dielectric layer>
- the production of the copper foil 1D ′ with a dielectric layer shown in FIG. 4 (b-2) is the same as that of the ninth embodiment, and therefore, the description is omitted here to avoid duplicating description.
- the refractory metal layer 20 was formed on the surface by sputtering deposition.
- This high melting point metal layer 20 was formed using a sputtering deposition method.
- the sputtering deposition apparatus and the basic sputtering conditions used at this time were such that cleaning by reverse sputtering as in the case of forming the upper electrode forming layer 11 in Example 1 was omitted, and Pre-sputtering (press sputtering power 2000W, pre-sputtering time 5 min.) was performed using a nickel target as the target placed in the chamber of the ring deposition apparatus, and film forming sputtering (sputtering power 2000 W, sputter time). 1.5 min.) To form a nickel layer with a thickness of about 30 nm on the surface of the dielectric layer 6.
- a copper layer having a thickness of 0.5 m to be the upper electrode forming layer 11 was formed by using the same sputtering method as in Example 1.
- the resulting copper clad laminate 10K ' was obtained.
- the copper foil 1D 'with a dielectric layer shown in FIG. 4 (b-2) was manufactured according to the manufacturing flow shown below, and was used to form the capacitor layer shown in FIG. 18 (b).
- a copper-clad laminate 10L ' was manufactured.
- a copper foil 2 having a nominal thickness of 18 m and having not been subjected to a surface treatment was used as the copper foil 2 serving as the lower electrode forming layer.
- Manufacturing of copper foil with dielectric layer> The production of the copper foil 1D ′ with a dielectric layer shown in FIG. 4 (b-2) is the same as that of the ninth embodiment, and therefore, the description is omitted here to avoid duplicating description.
- the surface of the dielectric layer 6 was sputter-deposited using a sputtering method in the same manner as in Example 2 to form a binder metal layer 12 having a thickness of 30 nm. A chromium layer was formed.
- Example 3 a 30-nm-thick nickel layer was formed as the high-melting-point metal layer 20 on the chromium layer formed as the binder metal layer 12 in the same manner as in Example 3. Further, a copper layer having a thickness of 0.5 m to be the upper electrode forming layer 11 was formed on the refractory metal layer 20 by using the same sputtering method as in Example 1. In this way, the lower electrode forming layer 2 Z refractory metal layer 20 / dielectric layer 6 Z binder metal layer 12 Z refractory metal layer 20 Z upper electrode forming layer 11 shown in FIG. A copper-clad laminate 10 L ′ for forming a six-layer capacity layer was obtained. In the state of the copper-clad laminate thus manufactured, it was examined whether or not a short circuit occurred between the copper foil 2 as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. Can not be found.
- the copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) was manufactured in accordance with the manufacturing flow shown below, and the capacitor shown in FIG. A copper-clad laminate 10M 'for forming a layer was produced.
- a copper foil 2 having a nominal thickness of 18 and not subjected to surface treatment and having a nominal thickness of 18 was used as the copper foil 2 serving as the lower electrode forming layer.
- the surface of the copper foil of 7 OmmX 70 mm size is pickled with 2 N sulfuric acid solution (room temperature). Treated to remove contaminants and excess oxides and dried. Then, the copper foil that had been subjected to the pickling treatment was placed in a chamber of a sputtering deposition apparatus (CFS-12P-100). Sputtering conditions are as follows.
- 0 one 3 P a was set to supply argon gas at a flow rate of 87 CMVM in the ion gun. Then, the surface of the copper foil, which had been subjected to the pickling treatment, was cleaned by reverse sputtering with argon ions.
- the reverse sputtering conditions were reverse sputtering power of 1000 W and reverse sputtering time of 1 Omin.
- pre-sputtering press-pattern power 1000W, press-pattern time 5m i ⁇
- a nickel layer was formed on the surface of the dielectric layer 6 as a refractory metal layer 20 having a thickness of about 30 nm on the surface of the dielectric layer 6 by film sputtering (sputter power 2000 W, sputter time 1.5 min.).
- oxygen gas was introduced into the chamber of the sputtering deposition apparatus at 29 cm 3 Zm
- a tantalum oxide film as an inorganic oxide sputter film having a thickness of about 1.0 m was formed on the surface of the substrate.
- the copper foil having the refractory metal layer 20, the binder metal layer 12, and the tan oxide film formed on one surface is taken out of the chamber of the sputtering deposition apparatus, and the pit-like defect portion of the tantalum oxide film is removed.
- Sealing treatment with a polyimide resin was performed in the same manner as in Example 1.
- a copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) was obtained.
- the upper electrode forming layer 11 is formed on the surface of the dielectric layer 6 by a sputtering deposition method with a thickness of 0.5 ⁇ m. A copper layer was formed. The sputtering deposition equipment and basic sputtering The evening ring conditions are the same as in the first embodiment. In this way, the lower electrode forming layer 2 Z refractory metal layer 20 Z binder metal layer 12 Z dielectric layer 6 / upper electrode forming layer 11 shown in FIG. Copper-clad laminate 10M 'was obtained. In the state of the copper-clad laminate thus manufactured, it was examined whether or not a short circuit occurred between the copper foil 2 as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. I could't find out what happened.
- the copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) is manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG. Copper-clad laminate 1 ON 'was manufactured.
- a copper foil 2 having a nominal thickness of 18 m and having not been subjected to surface treatment was used as the copper foil 2 serving as the lower electrode forming layer.
- the production of the copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) is the same as that of the embodiment 13, so that the description is omitted here to avoid redundant description.
- the binder metal layer 12 was formed on the surface of the dielectric layer 6 by sputtering deposition using the dielectric layer-attached copper foil 1E 'obtained as described above.
- This binder metal layer 12 formed a chromium layer having a thickness of about 30 nm on the surface of the dielectric layer 6 in the same manner as in Example 2.
- a copper layer having a thickness of 0.5 _im and serving as the upper electrode forming layer 11 was formed by using the same sputtering method as in Example 1.
- a copper-clad laminate 10 N 'for forming the capacity layer was obtained.
- the copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) was manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG. A copper clad laminate 10 P 'for forming was produced.
- a copper foil 2 having a nominal thickness of 18 m and having not been subjected to surface treatment and having a nominal thickness of 18 m was used as the copper foil 2 serving as the lower electrode forming layer.
- the production of the copper foil 1E ′ with a dielectric layer shown in FIG. 5 (b-2) is the same as that of the embodiment 13, so that the description is omitted here to avoid redundant description.
- a high melting point metal layer 20 was formed on the surface of the dielectric layer 6 by a sputtering deposition method.
- This high melting point metal layer 20 was formed using a sputtering deposition method.
- the sputtering apparatus and the basic sputtering conditions used at this time were such that cleaning by reverse sputtering as in the case of forming the upper electrode forming layer 11 of Example 1 was omitted, and the sputtering apparatus was used.
- pre-sputtering pre-sputter power 2000 W, pre-sputtering time 5 min.
- a film forming sputter sputter power 2000 W, sputter time 1.5 min.
- a copper layer having a thickness of 1.0 m to be the upper electrode forming layer 11 was formed by the same sputtering method as in Example 1.
- a copper clad laminate 10P 'for forming the capacity layer was obtained.
- the copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) was manufactured according to the manufacturing flow shown below, and the capacitor layer shown in FIG. 22 (b) was used by using it.
- a copper-clad laminate 10Q 'for forming was produced.
- a copper foil 2 having a nominal thickness of 18 and having not been subjected to a surface treatment was used as the copper foil 2 serving as the lower electrode forming layer. Manufacturing of copper foil with dielectric layer>
- the production of the copper foil 1E 'with a dielectric layer shown in FIG. 5 (b-2) is the same as that of the embodiment 13, so that the description is omitted here to avoid redundant description.
- a sputtering metallization method was used on the surface of the dielectric layer 6 using a sputtering method in the same manner as in Example 2 to form a binder metal layer 12 having a thickness of 30 nm.
- a chromium layer was formed.
- a nickel layer having a thickness of 30 nm was formed as the high melting point metal layer 20 on the chromium layer formed as the binder metal layer 12 in the same manner as in Example 15.
- a copper layer having a thickness of 0.5 im and serving as the upper electrode forming layer 11 was formed on the refractory metal layer 20 by using the same sputtering method as in Example 1.
- the dielectric filler was dispersed and used in the polyimide electrodeposition solution used for sealing with the polyimide resin of Examples 1 to 16. Therefore, Embodiments 17 to 32 were changed to the following methods with the sealing of Embodiments 1 to 16.
- the polyimide resin was electrodeposited, the pit-like defect portion of the tantalum oxide film was buried, and a polyimide resin film having a thickness of about 0.4 zm was formed on the surface thereof.
- copper foils 1A ', IB', 1C, ID ', and IE' with dielectric layers described in Examples 1 to 16 were obtained. .
- the present embodiment is different from the first embodiment only in that chromium is used for the upper electrode forming layer. Therefore, description of the same parts as those in the first embodiment will be omitted.
- a chromium layer having a thickness of 30 nm was formed as the upper electrode forming layer 11 on the surface of the dielectric layer 6 by using a sputtering deposition method.
- the sputtering evaporation apparatus and the basic sputtering conditions used at this time were the same as those described above, but cleaning by reverse sputtering was omitted. Then, using a chromium target as a target to be placed in one chamber of the sputtering deposition apparatus, press-pressing (press-press power 1000 W, press-press time 5 min.) Was performed, and film forming sputter (sputter power) was performed. 2000 W, a sputtering time of 1.3 min.) was performed, and a chromium layer serving as an upper electrode forming layer 11 having a thickness of about 30 nm was formed on the surface of the dielectric layer 6.
- a copper-clad laminate 1 OA ′ for forming a three-layered capacitor layer of the lower electrode forming layer 2 Z dielectric layer 6 Z upper electrode forming layer 11 shown in FIG. 7B was obtained. It is. Then, in a state of the copper-clad laminate in the same manner as in Example 1, it was examined whether or not a short circuit occurred between the copper foil 2 serving as the lower electrode forming layer and the upper electrode forming layer 11 at 20 places. The location where the short circuit occurred could not be found.
- a nickel-cobalt alloy film was applied as the high melting point metal layer 20 of the ninth to sixteenth embodiments.
- the surface of a copper foil of 7 Omm ⁇ 7 Omm size was pickled with a 2N sulfuric acid solution (room temperature) to remove contaminants and excess oxides, and dried. Then, a nickel-cobalt alloy film is formed as a high melting point metal layer on the surface of the copper foil which has been pickled by electrolysis. Was formed. At this time, the nickel-cobalt alloy film was made of 130 g of cobalt sulfate, 100 g of nickel sulfate, 30 g of boric acid, 12.5 g of potassium chloride, 12.5 g of potassium chloride, and dihydrogen phosphate. sodium 8 g / 1, at a liquid temperature of 4 0, p H 4.
- Example 2 a copper-clad laminate for forming a cap layer was produced according to a production flow substantially similar to that in Example 1.
- This comparative example differs from Example 1 in that the dielectric layer was not subjected to a sealing treatment with a polyimide resin. Therefore, the dielectric layer is composed of only the tantalum oxide thin film.
- the pickling treatment of the copper foil 2 and the formation of the tantalum oxide film by the sputtering deposition method are the same as in Example 1. Then, the copper foil on which the tantalum oxide film was formed was taken out of one chamber of the sputtering ring vapor deposition apparatus. In this state, it was used as a copper foil with a dielectric layer.
- the upper electrode forming layer is formed on the surface of the dielectric layer by sputtering in the same manner as in Example 1 to form an upper electrode 0.5.
- An m-thick copper layer was formed.
- the copper foil with a dielectric layer according to the present invention is suitable for use in manufacturing a built-in capacity substrate for a printed wiring board.
- the copper-clad laminate for forming the capacitor layer manufactured using this copper foil with a dielectric layer has a uniform thickness even if the dielectric layer is thin, and the lower part after the capacitor circuit is formed. Since the occurrence of a short circuit between the electrode and the upper electrode can be effectively prevented, the production yield of the copper-clad laminate having the capacitor circuit can be dramatically improved.
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JP2004548062A JPWO2004040604A1 (ja) | 2002-10-30 | 2003-10-29 | キャパシタ層形成用の誘電体層付銅箔並びにその誘電体層付銅箔を用いたキャパシタ層形成用の銅張積層板及びそのキャパシタ層形成用の誘電体層付銅箔の製造方法 |
US10/532,717 US7524552B2 (en) | 2002-10-30 | 2003-10-29 | Copper foil provided with dielectric layer for forming capacitor layer, copper clad laminate for formation of capacitor layer using such copper foil with dielectric layer, and method for manufacturing producing such copper foil with dielectric layer for formation of capacitor layer |
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JP2007189199A (ja) * | 2005-12-12 | 2007-07-26 | Tdk Corp | キャパシタおよびその製造方法 |
JP2008103630A (ja) * | 2006-10-20 | 2008-05-01 | Hitachi Chem Co Ltd | 樹脂基板内蔵用キャパシタ材料の製造方法 |
JP2008117985A (ja) * | 2006-11-07 | 2008-05-22 | Sumitomo Metal Mining Co Ltd | バルブ金属複合電極箔の製造方法 |
JP2008160040A (ja) * | 2006-12-26 | 2008-07-10 | Tdk Corp | キャパシタの製造方法 |
US7737529B2 (en) | 2005-10-19 | 2010-06-15 | Samsung Electro-Mechanics Co., Ltd. | Printed circuit board with film capacitor embedded therein and method for manufacturing the same |
JP2013042181A (ja) * | 2005-12-12 | 2013-02-28 | Tdk Corp | キャパシタの製造方法 |
JP2015126155A (ja) * | 2013-12-27 | 2015-07-06 | Tdk株式会社 | 薄膜キャパシタ |
JP2015126156A (ja) * | 2013-12-27 | 2015-07-06 | Tdk株式会社 | 薄膜キャパシタ |
WO2018038094A1 (ja) * | 2016-08-22 | 2018-03-01 | 重信 三浦 | キャパシタの製造方法及びキャパシタ内蔵基板の製造方法並びにキャパシタ内蔵基板及び半導体装置実装部品 |
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US7886436B2 (en) | 2005-11-07 | 2011-02-15 | Samsung Electro-Mechanics Co., Ltd. | Thin film capacitor-embedded printed circuit board and method of manufacturing the same |
JP2013062531A (ja) * | 2005-12-12 | 2013-04-04 | Tdk Corp | キャパシタおよびその製造方法 |
JP2007189199A (ja) * | 2005-12-12 | 2007-07-26 | Tdk Corp | キャパシタおよびその製造方法 |
JP2013042181A (ja) * | 2005-12-12 | 2013-02-28 | Tdk Corp | キャパシタの製造方法 |
JP2008103630A (ja) * | 2006-10-20 | 2008-05-01 | Hitachi Chem Co Ltd | 樹脂基板内蔵用キャパシタ材料の製造方法 |
JP2008117985A (ja) * | 2006-11-07 | 2008-05-22 | Sumitomo Metal Mining Co Ltd | バルブ金属複合電極箔の製造方法 |
JP4665889B2 (ja) * | 2006-11-07 | 2011-04-06 | 住友金属鉱山株式会社 | バルブ金属複合電極箔の製造方法 |
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JP2015126155A (ja) * | 2013-12-27 | 2015-07-06 | Tdk株式会社 | 薄膜キャパシタ |
JP2015126156A (ja) * | 2013-12-27 | 2015-07-06 | Tdk株式会社 | 薄膜キャパシタ |
WO2018038094A1 (ja) * | 2016-08-22 | 2018-03-01 | 重信 三浦 | キャパシタの製造方法及びキャパシタ内蔵基板の製造方法並びにキャパシタ内蔵基板及び半導体装置実装部品 |
JPWO2018038094A1 (ja) * | 2016-08-22 | 2019-07-25 | 重信 三浦 | キャパシタの製造方法及びキャパシタ内蔵基板の製造方法並びにキャパシタ内蔵基板及び半導体装置実装部品 |
CN108456858A (zh) * | 2018-03-08 | 2018-08-28 | 合肥开泰机电科技有限公司 | 电路基板钻孔干法金属化方法 |
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JPWO2004040604A1 (ja) | 2006-03-02 |
US20060057420A1 (en) | 2006-03-16 |
US7524552B2 (en) | 2009-04-28 |
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