JP7201621B2 - キャリア付銅箔 - Google Patents
キャリア付銅箔 Download PDFInfo
- Publication number
- JP7201621B2 JP7201621B2 JP2019562900A JP2019562900A JP7201621B2 JP 7201621 B2 JP7201621 B2 JP 7201621B2 JP 2019562900 A JP2019562900 A JP 2019562900A JP 2019562900 A JP2019562900 A JP 2019562900A JP 7201621 B2 JP7201621 B2 JP 7201621B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- carrier
- copper foil
- metal oxide
- sputtering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims description 156
- 239000011889 copper foil Substances 0.000 title claims description 70
- 239000010949 copper Substances 0.000 claims description 115
- 229910052802 copper Inorganic materials 0.000 claims description 101
- 229910044991 metal oxide Inorganic materials 0.000 claims description 60
- 150000004706 metal oxides Chemical class 0.000 claims description 60
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 52
- 229910052799 carbon Inorganic materials 0.000 claims description 52
- 229910052751 metal Inorganic materials 0.000 claims description 45
- 238000005530 etching Methods 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 41
- 238000005240 physical vapour deposition Methods 0.000 claims description 39
- 239000011521 glass Substances 0.000 claims description 21
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 11
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical group [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 10
- 239000005751 Copper oxide Substances 0.000 claims description 10
- 229910000431 copper oxide Inorganic materials 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000010410 layer Substances 0.000 description 380
- 238000004544 sputter deposition Methods 0.000 description 69
- 230000015572 biosynthetic process Effects 0.000 description 43
- 238000000034 method Methods 0.000 description 36
- 239000010936 titanium Substances 0.000 description 36
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 28
- 229910052719 titanium Inorganic materials 0.000 description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 21
- 229910052782 aluminium Inorganic materials 0.000 description 21
- 239000007789 gas Substances 0.000 description 20
- 229910052759 nickel Inorganic materials 0.000 description 20
- 229910052804 chromium Inorganic materials 0.000 description 18
- 239000011651 chromium Substances 0.000 description 18
- 229910052750 molybdenum Inorganic materials 0.000 description 16
- 229910052786 argon Inorganic materials 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 13
- 229910052721 tungsten Inorganic materials 0.000 description 13
- 229910052726 zirconium Inorganic materials 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 11
- 229910052758 niobium Inorganic materials 0.000 description 10
- 229910052709 silver Inorganic materials 0.000 description 10
- 229910052715 tantalum Inorganic materials 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 230000001590 oxidative effect Effects 0.000 description 8
- 238000007747 plating Methods 0.000 description 8
- 238000005546 reactive sputtering Methods 0.000 description 8
- 238000010301 surface-oxidation reaction Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 229910052738 indium Inorganic materials 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052718 tin Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000012159 carrier gas Substances 0.000 description 5
- 229910052733 gallium Inorganic materials 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 238000001755 magnetron sputter deposition Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 229910003481 amorphous carbon Inorganic materials 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 238000004299 exfoliation Methods 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000005361 soda-lime glass Substances 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- 238000000992 sputter etching Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 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
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000012764 semi-quantitative analysis Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- 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
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4682—Manufacture of core-less build-up multilayer circuits on a temporary carrier or on a metal foil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0005—Separation of the coating from the substrate
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/0021—Reactive sputtering or evaporation
- C23C14/0036—Reactive sputtering
- C23C14/0042—Controlling partial pressure or flow rate of reactive or inert gases with feedback of measurements
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/024—Deposition of sublayers, e.g. to promote adhesion of the coating
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C23C14/025—Metallic sublayers
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C23C14/085—Oxides of iron group metals
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
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- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/14—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using spraying techniques to apply the conductive material, e.g. vapour evaporation
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- H05K3/46—Manufacturing multilayer circuits
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- C—CHEMISTRY; METALLURGY
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- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
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- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
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- H05K2203/088—Using a vapour or mist, e.g. cleaning using water vapor
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- 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
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- 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
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Description
ガラス又はセラミックスで構成されるキャリアと、
前記キャリア上に設けられ、Cu、Ti、Al、Nb、Zr、Cr、W、Ta、Co、Ag、Ni、In、Sn、Zn、Ga及びMoからなる群から選択される少なくとも1種の金属で構成される中間層と、
前記中間層上に設けられ、炭素層及び金属酸化物層を含む、又は金属酸化物及び炭素を含む、剥離層と、
前記剥離層上に設けられる極薄銅層と、
を備えた、キャリア付銅箔が提供される。
本発明のキャリア付銅箔の一例が図1に模式的に示される。図1に示されるように、本発明のキャリア付銅箔10は、キャリア12と、中間層14と、剥離層16と、極薄銅層18とをこの順に備えたものである。キャリア12はガラス又はセラミックスで構成される。中間層14はキャリア12上に設けられ、Cu、Ti、Al、Nb、Zr、Cr、W、Ta、Co、Ag、Ni、In、Sn、Zn、Ga及びMoからなる群から選択される少なくとも1種の金属で構成される層である。剥離層16は、中間層14上に設けられる、金属酸化物層16a及び炭素層16bを含む(あるいは金属酸化物及び炭素を含む)層である。極薄銅層18は、剥離層16上に設けられる、銅からなる層である。所望により、本発明のキャリア付銅箔10は、剥離層16と極薄銅層18の間にエッチングストッパー層17をさらに有していてもよい。また、キャリア12の両面に上下対称となるように上述の各種層を順に備えてなる構成としてもよい。キャリア付銅箔10は、上述した中間層14及び剥離層16を備えること以外は、公知の層構成を採用すればよく特に限定されない。このように、キャリア付銅箔10の中間層14と極薄銅層18の間に、金属酸化物層16a及び炭素層16bを剥離層16として設けることで、350℃以上の高温で長時間(例えば2時間以上)加熱された後においても、安定した剥離性を保持することが可能となる。したがって、本発明のキャリア付銅箔は350℃以上で使用されるのが好ましい。
本発明によるキャリア付銅箔10は、上述したキャリア12を用意し、キャリア12上に、中間層14、剥離層16(すなわち順不同で金属酸化物層16a及び炭素層16b)、所望によりエッチングストッパー層17、及び極薄銅層18を形成することにより製造することができる。中間層14、剥離層16、エッチングストッパー層17(存在する場合)及び極薄銅層18の各層の形成は、極薄化によるファインピッチ化に対応しやすい観点から、物理気相堆積(PVD)法により行われるのが好ましい。物理気相堆積(PVD)法の例としては、スパッタリング法、真空蒸着法、及びイオンプレーティング法が挙げられるが、0.05nm~5000nmといった幅広い範囲で膜厚制御できる点、広い幅ないし面積にわたって膜厚均一性を確保できる点等から、最も好ましくはスパッタリング法である。特に、中間層14、剥離層16、エッチングストッパー層17(存在する場合)及び極薄銅層18の全ての層をスパッタリング法により形成することで、製造効率が格段に高くなる。物理気相堆積(PVD)法による成膜は公知の気相成膜装置を用いて公知の条件に従って行えばよく特に限定されない。例えば、スパッタリング法を採用する場合、スパッタリング方式は、マグネトロンスパッタリング、2極スパッタリング法、対向ターゲットスパッタリング法等、公知の種々の方法であってよいが、マグネトロンスパッタリングが、成膜速度が速く生産性が高い点で好ましい。スパッタリングはDC(直流)及びRF(高周波)のいずれの電源で行ってもよい。また、ターゲット形状も広く知られているプレート型ターゲットを使用することができるが、ターゲット使用効率の観点から円筒形ターゲットを用いることが望ましい。以下、中間層14、剥離層16(すなわち順不同で金属酸化物層16a及び炭素層16b)、エッチングストッパー層17(存在する場合)及び極薄銅層18の各層の物理気相堆積(PVD)法(好ましくはスパッタリング法)による成膜について説明する。
図1に示されるように、キャリア12としてのガラスシート上に、中間層14(Ti含有層及びCu含有層)、金属酸化物層16a、炭素層16b、エッチングストッパー層17、及び極薄銅層18をこの順に成膜してキャリア付銅箔10を作製した。具体的な手順は以下のとおりである。
厚さ1.1mmのガラスシート(材質:ソーダライムガラス、算術平均粗さRa:0.6nm、セントラル硝子株式会社製)を用意した。
キャリア12の表面に、Ti含有層として厚さ100nmのチタン層を以下の装置及び条件でスパッタリングにより形成した。
‐ 装置:枚葉式マグネロトンスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)のTiターゲット(純度99.999%)
‐ 到達真空度:1×10-4Pa未満
‐ キャリアガス:Ar(流量:100sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:1000W(3.1W/cm2)
‐ 成膜時温度:40℃
Ti含有層の上に、Cu含有層として厚さ100nmの銅層を以下の装置及び条件でスパッタリングにより形成した。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)の銅ターゲット(純度99.98%)
‐ 到達真空度:1×10-4Pa未満
‐ ガス:アルゴンガス(流量:100sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:1000W(6.2W/cm2)
‐ 成膜時温度:40℃
Ti含有層及びCu含有層が形成された試料を真空中から取り出し、1分間大気暴露することで、Cu含有層の表面酸化処理(自然酸化)を行った。この表面酸化処理により、金属酸化物層16aとして酸化銅層を形成した。これまでの経験によれば酸化銅層の厚さは約0.5~1.0nmと推定される。
金属酸化物層16a上に、炭素層16bとして厚さ6nmのアモルファスカーボン層を以下の装置及び条件でスパッタリングにより形成した。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)の炭素ターゲット(純度99.999%)
‐ 到達真空度:1×10-4Pa未満
‐ キャリアガス:Ar(流量:100sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:250W(0.7W/cm2)
‐ 成膜時温度:40℃
炭素層16bの表面に、エッチングストッパー層17として厚さ100nmのチタン層を以下の装置及び条件でスパッタリングにより形成した。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)のチタンターゲット(純度99.999%)
‐ キャリアガス:Ar(流量:100sccm)
‐ 到達真空度:1×10-4Pa未満
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:1000W(3.1W/cm2)
エッチングストッパー層17の上に、膜厚300nmの極薄銅層18を以下の装置及び条件でスパッタリングにより形成して、キャリア付銅箔10を得た。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)の銅ターゲット(純度99.98%)
‐ 到達真空度:1×10-4Pa未満
‐ キャリアガス:Ar(流量:100sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:1000W(3.1W/cm2)
‐ 成膜時温度:40℃
金属酸化物層16aとして、大気暴露によるCu含有層の表面酸化処理を行う代わりに、酸化銅層を以下のようにして反応性スパッタリングにより形成したこと以外は、例1と同様にしてキャリア付銅箔の作製を行った。
Cu含有層の表面に、狙いの厚さが約1nmの酸化銅層を以下の装置及び条件で反応性スパッタリングにより形成した。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)の銅ターゲット(純度99.98%)
‐ 到達真空度:1×10-4Pa未満
‐ ガス:アルゴンガス(流量:90sccm)及び酸素ガス(流量:10sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:100W(0.3W/cm2)
‐ 成膜時温度:40℃
金属酸化物層16a(酸化銅層)の狙いの厚さを約2nmとしたこと以外は、例2と同様にしてキャリア付銅箔の作製を行った。
金属酸化物層16aを形成しなかった(すなわち大気暴露によるCu含有層の表面酸化処理を行わなかった)こと以外は、例1と同様にしてキャリア付銅箔の作製を行った。
中間層14としてTi含有層及びCu含有層の2層の代わりにAl含有層の単層を以下のようにして形成したこと、及び金属酸化物層16aとして酸化銅層の代わりに酸化アルミニウム層を以下のようにして形成したこと以外は、例1と同様にしてキャリア付銅箔の作製を行った。
キャリア12の表面に、Al含有層として厚さ200nmのアルミニウム層を以下の装置及び条件でスパッタリングにより形成した。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)のAlターゲット(純度99.9%以上)
‐ 到達真空度:1×10-4Pa未満
‐ キャリアガス:Ar(流量:100sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:100W
‐ 成膜時温度:40℃
Al含有層を形成した試料を真空中から取り出し、1分間大気暴露することで、Al含有層の表面酸化処理(自然酸化)を行った。この表面酸化処理により、金属酸化物層16aとして酸化アルミニウム層を形成した。
金属酸化物層16aとして、大気暴露によるAl含有層の表面酸化処理を行う代わりに、酸化アルミニウム層を以下のようにして反応性スパッタリングにより形成したこと以外は、例5と同様にしてキャリア付銅箔の作製を行った。
Al含有層の表面に、金属酸化物層16aとして狙いの厚さが約1nmの酸化アルミニウム層を以下の装置及び条件で反応性スパッタリングにより形成した。
‐ 装置:枚葉式DCスパッタリング装置(キヤノントッキ株式会社製、MLS464)
‐ ターゲット:直径8インチ(203.2mm)のAlターゲット(純度99.99%)
‐ 到達真空度:1×10-4Pa未満
‐ ガス:アルゴンガス(流量:90sccm)及び酸素ガス(流量:10sccm)
‐ スパッタリング圧:0.35Pa
‐ スパッタリング電力:100W
‐ 成膜時温度:40℃
金属酸化物層16a(酸化アルミニウム層)の狙いの厚さを約2nmとしたこと以外は、例6と同様にしてキャリア付銅箔の作製を行った。
金属酸化物層16aとして酸化アルミニウム層を形成しなかった(すなわち大気暴露によるAl含有層の表面酸化処理を行わなかった)こと以外は、例5と同様にしてキャリア付銅箔の作製を行った。
例1~8のキャリア付銅箔について、以下に示されるとおり、各種評価を行った。評価結果は表1に示されるとおりであった。また、表1には中間層14及び剥離層16の組成、並びに金属酸化物層16aの形成条件も併せて示してある。
例3及び4につき、作製したキャリア付銅箔の深さ方向元素分析を以下の測定条件及び解析条件に基づきXPSにより行った。この分析は、キャリア付銅箔を極薄銅層表面から深さ方向に向かって、以下の条件でArイオンエッチングによって掘り下げながら行った。
‐ 加速電圧:500V
‐ エッチングエリア:2mm×2mm
‐ エッチング速度:SiO2換算で1.4nm/min
‐ 装置:X線光電子分光装置(アルバック・ファイ株式会社製、Quantum2000)
‐ 励起X線:単色化Al-Kα線(1486.6eV)
‐ 出力:100W
‐ 加速電圧:15kV
‐ X線照射径:直径100μm
‐ 測定面積:直径100μm×1mm
‐ パスエネルギー:23.5eV
‐ エネルギーステップ:0.1eV
‐ 中和銃:有
‐ 測定元素及び軌道:(sweep数:Ratio:Cycle数)
O 1s:(5:6:1)
Cu 2p3:(2:6:1)
C 1s:(3:6:1)
Ti 2p:(2:6:1)
Si 2p:(1:6:1)
データ解析ソフト(アルバック・ファイ株式会社製「マルチパックVer9.4.0.7」)を用いてXPSデータの解析を行った。スムージングは9点で行い、バックグラウンドモードはShirleyを使用した。なお、半定量算出における各元素のバックグラウンド範囲は以下のとおりである。
‐ O 1s:528.0~540.0eV
‐ Cu 2p3:927.0~939.0eV
‐ C1 s:280.0~292.0eV
‐ Ti 2p:451.2~464.5eV
‐ Si 2p:ピークが検出下限以下であったため、0とした。
キャリア付銅箔10における熱履歴としての真空熱プレスを行った後の剥離強度の測定を以下のように行った。キャリア付銅箔10の極薄銅層18側に、厚さ18μmのパネル電解銅めっきを施した後、熱履歴として350℃で2時間30kgf/cm2の圧力でプレスした。得られた銅張積層板に対して、JIS C 6481-1996に準拠して、極薄銅層18と一体となった電気銅めっき層を剥離した時の剥離強度(gf/cm)を測定した。このとき、測定幅は50mmとし、測定長さは20mmとした。こうして得られた剥離強度(平均値)を以下の基準で格付けした。
評価A:自然剥離せず、かつ、剥離強度が50gf/cm以下
評価B:剥離強度が50gf/cm超150gf/cm以下
評価C:自然剥離が起こるか又は150gf/cm超(剥離不可を含む)
各キャリア付銅箔10の極薄銅層18の表面を1.8mol/Lの希硫酸で処理して表面の酸化膜の除去を行い、その後、水洗及び乾燥を行った。その後、極薄銅層18の表面に感光性ドライフィルムを貼り付け、ライン/スペース(L/S)=5μm/5μmのパターンを与えるように露光及び現像を行った。現像は、現像液として1.0重量%炭酸ナトリウム水溶液を用いて、25℃で2分間、シャワー方式により行った。こうして得られた配線層付コアレス支持体(パターン形成された配線間に極薄銅層18が露出した状態のもの)を硫酸-過酸化水素混合液を含むエッチング液に23℃で5分間、シャワー圧力0.1MPaにて浸漬することにより銅フラッシュエッチングを行った。こうして、パターン形成された配線間に露出した極薄銅層18を除去した。フラッシュエッチング後の配線層付コアレス支持体を観察することによりエッチングストッパー層17の耐薬品性を評価した。得られた評価結果を以下の基準で格付けした。
評価A:エッチングストッパー層が一切溶解することなく残留していた。
評価B:エッチングストッパー層がわずかに溶解し、後工程に悪影響を及ぼす可能性がある。
評価C:エッチングストッパー層が一部溶解し、後工程に悪影響を及ぼす可能性が高い。
Claims (9)
- ガラス又はセラミックスで構成されるキャリアと、
前記キャリア上に設けられる中間層と、
前記中間層上に設けられ、金属酸化物層及び炭素層を含む、剥離層と、
前記剥離層上に設けられる極薄銅層と、
を備え、
前記剥離層と前記極薄銅層の間に、Tiで構成されるエッチングストッパー層をさらに備え、
前記金属酸化物層が前記中間層に隣接し、かつ、前記炭素層が前記極薄銅層に近い側に設けられ、
前記中間層が、前記キャリアに隣接するTi含有層と、前記剥離層に隣接するCu含有層とを含み、かつ、前記金属酸化物層が酸化銅層である、又は
前記中間層がAl含有層であり、かつ、前記金属酸化物層が酸化アルミニウム層であり、
前記中間層、前記炭素層、前記金属酸化物層、前記エッチングストッパー層、及び前記極薄銅層はいずれも物理気相堆積(PVD)膜である、キャリア付銅箔。 - 前記中間層を構成する金属の標準電極電位が、前記エッチングストッパー層を構成する金属の標準電極電位以上である、請求項1に記載のキャリア付銅箔。
- 前記中間層の厚さが10~1000nmである、請求項1又は2に記載のキャリア付銅箔。
- 前記金属酸化物層の厚さが100nm以下である、請求項1~3のいずれか一項に記載のキャリア付銅箔。
- 前記炭素層の厚さが1~20nmである、請求項1~4のいずれか一項に記載のキャリア付銅箔。
- 前記エッチングストッパー層の厚さが1~500nmである、請求項1~5のいずれか一項に記載のキャリア付銅箔。
- 前記極薄銅層の厚さが10~1000nmである、請求項1~6のいずれか一項に記載のキャリア付銅箔。
- 350℃以上で使用される、請求項1~7のいずれか一項に記載のキャリア付銅箔。
- 前記キャリア上に、前記中間層、前記炭素層、前記金属酸化物層、前記エッチングストッパー層、及び前記極薄銅層をいずれも物理気相堆積(PVD)法によって作製することを特徴とする、請求項1~8のいずれか一項に記載のキャリア付銅箔の製造方法。
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