JP7593324B2 - 積層体およびその製造方法 - Google Patents
積層体およびその製造方法 Download PDFInfo
- Publication number
- JP7593324B2 JP7593324B2 JP2021550540A JP2021550540A JP7593324B2 JP 7593324 B2 JP7593324 B2 JP 7593324B2 JP 2021550540 A JP2021550540 A JP 2021550540A JP 2021550540 A JP2021550540 A JP 2021550540A JP 7593324 B2 JP7593324 B2 JP 7593324B2
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- nickel
- film layer
- plating film
- layer
- mass
- 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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- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 238000007747 plating Methods 0.000 claims description 128
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 112
- 239000010931 gold Substances 0.000 claims description 60
- 229910052737 gold Inorganic materials 0.000 claims description 60
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 58
- 229910052759 nickel Inorganic materials 0.000 claims description 56
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 34
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 33
- 238000002161 passivation Methods 0.000 claims description 29
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims description 26
- 229910001096 P alloy Inorganic materials 0.000 claims description 23
- 229910052698 phosphorus Inorganic materials 0.000 claims description 17
- 239000011574 phosphorus Substances 0.000 claims description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 15
- 239000010935 stainless steel Substances 0.000 claims description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000006467 substitution reaction Methods 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 78
- 239000007789 gas Substances 0.000 description 18
- 230000007797 corrosion Effects 0.000 description 14
- 238000005260 corrosion Methods 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000003682 fluorination reaction Methods 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 229910001873 dinitrogen Inorganic materials 0.000 description 10
- 238000000576 coating method Methods 0.000 description 9
- 229910052731 fluorine Inorganic materials 0.000 description 9
- 239000011737 fluorine Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 5
- -1 degreasing Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000005238 degreasing Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- DBJLJFTWODWSOF-UHFFFAOYSA-L nickel(ii) fluoride Chemical compound F[Ni]F DBJLJFTWODWSOF-UHFFFAOYSA-L 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- JOHWNGGYGAVMGU-UHFFFAOYSA-N trifluorochlorine Chemical compound FCl(F)F JOHWNGGYGAVMGU-UHFFFAOYSA-N 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- QKCGXXHCELUCKW-UHFFFAOYSA-N n-[4-[4-(dinaphthalen-2-ylamino)phenyl]phenyl]-n-naphthalen-2-ylnaphthalen-2-amine Chemical compound C1=CC=CC2=CC(N(C=3C=CC(=CC=3)C=3C=CC(=CC=3)N(C=3C=C4C=CC=CC4=CC=3)C=3C=C4C=CC=CC4=CC=3)C3=CC4=CC=CC=C4C=C3)=CC=C21 QKCGXXHCELUCKW-UHFFFAOYSA-N 0.000 description 2
- 150000002815 nickel Chemical class 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- MQRWBMAEBQOWAF-UHFFFAOYSA-N acetic acid;nickel Chemical compound [Ni].CC(O)=O.CC(O)=O MQRWBMAEBQOWAF-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 238000001636 atomic emission spectroscopy Methods 0.000 description 1
- RJTANRZEWTUVMA-UHFFFAOYSA-N boron;n-methylmethanamine Chemical compound [B].CNC RJTANRZEWTUVMA-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- ADPOBOOHCUVXGO-UHFFFAOYSA-H dioxido-oxo-sulfanylidene-$l^{6}-sulfane;gold(3+) Chemical compound [Au+3].[Au+3].[O-]S([O-])(=O)=S.[O-]S([O-])(=O)=S.[O-]S([O-])(=O)=S ADPOBOOHCUVXGO-UHFFFAOYSA-H 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 0.000 description 1
- SRCZENKQCOSNAI-UHFFFAOYSA-H gold(3+);trisulfite Chemical compound [Au+3].[Au+3].[O-]S([O-])=O.[O-]S([O-])=O.[O-]S([O-])=O SRCZENKQCOSNAI-UHFFFAOYSA-H 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229940078494 nickel acetate Drugs 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 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
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 description 1
- GVGCUCJTUSOZKP-UHFFFAOYSA-N nitrogen trifluoride Chemical compound FN(F)F GVGCUCJTUSOZKP-UHFFFAOYSA-N 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- CTSLXHKWHWQRSH-UHFFFAOYSA-N oxalyl chloride Substances ClC(=O)C(Cl)=O CTSLXHKWHWQRSH-UHFFFAOYSA-N 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229910001380 potassium hypophosphite Inorganic materials 0.000 description 1
- CRGPNLUFHHUKCM-UHFFFAOYSA-M potassium phosphinate Chemical compound [K+].[O-]P=O CRGPNLUFHHUKCM-UHFFFAOYSA-M 0.000 description 1
- XTFKWYDMKGAZKK-UHFFFAOYSA-N potassium;gold(1+);dicyanide Chemical compound [K+].[Au+].N#[C-].N#[C-] XTFKWYDMKGAZKK-UHFFFAOYSA-N 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
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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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
-
- 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
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
- B32B15/015—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium the said other metal being copper or nickel or an alloy thereof
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1635—Composition of the substrate
- C23C18/1637—Composition of the substrate metallic substrate
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
- C23C18/1651—Two or more layers only obtained by electroless plating
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
- C23C18/1653—Two or more layers with at least one layer obtained by electroless plating and one layer obtained by electroplating
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
- C23C18/1692—Heat-treatment
- C23C18/1696—Control of atmosphere
-
- 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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1848—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by electrochemical pretreatment
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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
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
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- C—CHEMISTRY; METALLURGY
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Description
[1]金属基材と、前記金属基材上に形成されたニッケル含有めっき被膜層と、前記ニッケル含有めっき被膜層上に形成された金めっき被膜層とを有し、かつ、前記金めっき被膜層のピンホールが厚さ8nm以上のフッ化不働態被膜によって封孔されている積層体。
[4]前記ニッケル含有めっき被膜層が、リン濃度が8質量%以上10質量%未満のニッケル-リン合金めっき層(1)と、リン濃度が10質量%以上12質量%以下のニッケル-リン合金めっき層(2)とを、前記金属基材側からこの順で含む、前記[1]~[3]のいずれかに記載の積層体。
[7]金属基材上にニッケル含有めっき被膜層を形成する工程(A)、前記ニッケル含有めっき被膜層上に金めっき被膜層を形成する工程(B)、および前記金めっき被膜層のピンホールに、厚さ8nm以上のフッ化不働態被膜を形成する封孔処理工程(C)を含む、積層体の製造方法。
[9]前記金属基材が、ステンレス鋼、鉄、アルミニウム、アルミニウム合金、銅および銅合金からなる群より選ばれる少なくとも1つの金属を含む、前記[7]または[8]に記載の積層体の製造方法。
本発明の一実施形態の積層体は、金属基材と、前記金属基材上に形成されたニッケル含有めっき被膜層と、前記ニッケル含有めっき被膜層上に形成された金めっき被膜層とを有し、かつ、前記金めっき被膜層のピンホールが厚さ8nm以上のフッ化不働態被膜によって封孔されている。
本発明の一実施形態に用いられる金属基材は、少なくとも表面が金属からなる基材である。前記金属基材としては、特に限定されず、半導体製造装置の構成部材に一般的に用いられる金属が挙げられ、好ましくはステンレス鋼、鉄、アルミニウム、アルミニウム合金、銅および銅合金である。
ニッケル含有めっき被膜層は、工程(A)により前記金属基材上に形成される。なお、前記金属基材にニッケルストライク処理を施した場合、金属基材とニッケルめっき被膜層の間にニッケルストライク層を有する。
ニッケル含有めっき被膜層は、ニッケル塩と、還元剤としてリン化合物とを含む無電解メッキ浴を用いて金属基材上に形成することができる。ニッケル塩としては、例えば、硫酸ニッケル、塩化ニッケル、酢酸ニッケル、炭酸ニッケルなどが挙げられる。リン化合物としては、例えば、次亜リン酸ナトリウム、次亜リン酸カリウムなどが挙げられる。
金めっき被膜層は、工程(B)により前記ニッケル含有めっき被膜層上に形成される。
前記金めっき被膜層の形成方法としては、特に限定されないが、無電解金めっき法が好ましい。無電解金めっき法では、置換型金めっきを行った後、還元型金めっきを行うことが好ましい。すなわち、前記工程(B)は、置換型金めっき被膜層を形成させる工程(b1)と、該工程(b1)の後に、還元型金めっき被膜層を形成させる工程(b2)とを含むことが好ましい。
前記金めっき被膜層表面を工程(C)にてフッ化処理することにより、前記金めっき被膜層のピンホールがフッ化不働態被膜によって封孔される。
工程(C)では、前記工程(A)および(B)を経た金めっき被膜層のピンホールから露出するニッケル含有めっき被膜層表面を、フッ化ガスを使用して強制フッ化することでフッ化不働態被膜を形成させ、ピンホールを封孔処理する。
前記フッ化ガスを希釈して使用する場合、その濃度は反応条件によって適宜設定することができる。例えば、フッ素の場合には、コスト等を考慮して10%程度の濃度で使用することが好ましい。
<工程(A)>
縦15mm×横15mm×厚さ1mmの試験片サイズに加工したステンレス鋼(SUS316L)の表面に、前処理として、脱脂、酸洗浄およびニッケルストライク処理を施した。前記酸洗浄は、洗浄剤として塩酸を用い、室温で25秒間行った。該ニッケルストライク処理を施したステンレス鋼の表面に、無電解ニッケル-リンめっき薬剤「ニムデン(商標)NSX」(上村工業(株)製)を使用して、めっき温度90℃、pH4.5~4.8の条件下、成膜速度10μm/25分で、成膜時のリン含有量が8質量%以上10質量%未満の無電解ニッケル-リン合金めっき被膜層(1)を形成した。次いで、無電解ニッケル-リンめっき薬剤「ニムデン(商標)HDX」(上村工業(株)製)を使用して、成膜速度10μm/50分で、成膜時のリン含有量が10質量%以上12質量%以下の無電解ニッケル―リン合金めっき被膜層(2)を形成した。これにより、ニッケルストライク処理を施したステンレス鋼上に、合計20μm厚のニッケル含有めっき被膜層を形成させた。
2種類の無電解金めっき液「フラッシュゴールドNC(置換型)」および「セルフゴールドOTK-IT(還元型)」(いずれも奥野製薬工業(株)製)をこの順で使用して、工程(A)で形成したニッケル含有めっき被膜層上に、それぞれ置換型めっき温度70℃で5分および還元型めっき温度60℃で10分の処理をこの順で行い、合計0.6μm厚の金めっき被膜層を形成させた。
工程(A)および(B)で形成したニッケル含有めっき被膜層および金めっき被膜層を有するステンレス鋼を常圧気相流通式反応炉の内部に装着し、炉内温度を115℃まで昇温させた。その後、大気を窒素ガスで置換し、続いて窒素ガスで希釈された10体積%フッ素ガスを導入して反応炉内の窒素ガスを10体積%フッ素ガスに置換した。完全置換後、その状態を36時間保持し、金めっきを施工したときに発生したピンホールによる下地の無電解ニッケル-リン被膜の露出部分を強制フッ化して、フッ化不働態被膜を形成させた。得られたフッ化不働態被膜をW-SEM「JSM-IT200」(日本電子株(製))で分析したところ、フッ化不働態被膜の膜厚は10nmであることを確認した。なお、ここでのフッ化不働態被膜の膜厚とは、得られる積層体の積層方向の長さであり、例えば、図1(b)におけるフッ化不働態被膜5の上下方向の長さである。
実施例1の工程(C)において窒素ガスで希釈された10体積%フッ素ガスを用いた強制フッ化時間を72時間に変更した以外は実施例1と同様の方法で、フッ化不働態被膜を形成させた。得られたフッ化不働態被膜を実施例1と同様にして膜厚を求めたところ、13nmであることを確認した。
実施例1においてステンレス鋼(SUS316L)の代わりにアルミニウム合金(A5052)を用いて、前処理として、脱脂、活性化処理、酸洗浄および亜鉛置換処理を施した後、実施例1と同様の方法で工程(A)および(B)を実施した。
実施例1の工程(A)のみを実施し、ステンレス鋼の表面にニッケル含有めっき被膜層合計20μmを形成させた。
実施例1の工程(A)および(B)を実施後、ニッケル含有めっき被膜層および金めっき被膜層を有するステンレス鋼を大気に露出させて自然酸化被膜を形成させた。得られた自然酸化被膜を実施例1と同様にして膜厚を求めたところ、7nmであることを確認した。
実施例1の工程(A)を実施した後に以下の処理を行った。ニッケル含有めっき被膜層を有するステンレス鋼を常圧気相流通式反応炉の内部に装着し、炉内温度を300℃まで昇温させた。その後、大気を窒素ガスで置換し、続いて100体積%酸素ガスを導入して窒素ガスを酸素ガスに置換した。完全置換後、その状態を12時間保持した。次いで、窒素ガスで希釈された10体積%フッ素ガスを導入し、その状態を12時間保持することにより、ニッケル含有めっき被膜層上にフッ化ニッケル(NiF2)膜を形成させた。その後、成膜安定化を図るため窒素ガスを12時間注入した。
上記実施例1~3および比較例1~3で得られた金属基材表面上の被膜について、下記の方法で評価を行った。評価結果を表1に示す。
縦15mm×横15mm×厚さ1mmの試験片を35質量%塩酸溶液に25℃で5時間浸漬させた。浸漬前後の質量減少量[mg/dm2]に基づいて下記基準で塩酸耐食性を評価した。
(評価基準)
A:0.1mg/dm2未満
B:0.1mg/dm2以上3mg/dm2未満
C:3mg/dm2以上
2・・・ニッケル含有めっき被膜層
2a・・・ニッケル-リン合金めっき層(1)
2b・・・ニッケル-リン合金めっき層(2)
3・・・金めっき被膜層
4・・・ピンホール
5・・・フッ化不働態被膜
Claims (12)
- 金属基材と、前記金属基材上に形成されたニッケル含有めっき被膜層と、前記ニッケル含有めっき被膜層上に形成された金めっき被膜層とを有し、かつ、
厚さ8nm以上のフッ化不働態被膜が前記ニッケル含有めっき被膜層露出面にのみ形成されている積層体。 - 前記金属基材が、ステンレス鋼、鉄、アルミニウム、アルミニウム合金、銅および銅合金からなる群より選ばれる少なくとも1つの金属を含む、請求項1に記載の積層体。
- 前記金属基材と前記ニッケル含有めっき被膜層の間に、ニッケルストライク層を有する、請求項1または2に記載の積層体。
- 前記ニッケル含有めっき被膜層が、リン濃度が8質量%以上10質量%未満のニッケル-リン合金めっき層(1)と、リン濃度が10質量%以上12質量%以下のニッケル-リン合金めっき層(2)とを、前記金属基材側からこの順で含む、請求項1~3のいずれか1項に記載の積層体。
- 前記金めっき被膜層が、置換型金めっき被膜層および還元型金めっき被膜層を、前記ニッケル含有めっき被膜層側からこの順で含む、請求項1~4のいずれか1項に記載の積層体。
- 請求項1~5のいずれか1項に記載の積層体からなる、半導体製造装置の構成部材。
- 金属基材上にニッケル含有めっき被膜層を形成する工程(A)、
前記ニッケル含有めっき被膜層上に金めっき被膜層を形成する工程(B)、および
厚さ8nm以上のフッ化不働態被膜を前記ニッケル含有めっき被膜層露出面にのみ形成する封孔処理工程(C)を含む、積層体の製造方法。 - 前記封孔処理工程(C)が、フッ化ガス濃度8体積%以上および温度100~150℃の雰囲気下で行われる、請求項7に記載の積層体の製造方法。
- 前記金属基材が、ステンレス鋼、鉄、アルミニウム、アルミニウム合金、銅および銅合金からなる群より選ばれる少なくとも1つの金属を含む、請求項7または8に記載の積層体の製造方法。
- 前記工程(A)の前に、金属基材に対し電流密度5~20A/dm2の条件でニッケルストライク処理を施す工程を含む、請求項7~9のいずれか1項に記載の積層体の製造方法。
- 前記工程(A)が、リン濃度が8質量%以上10質量%未満のニッケル-リン合金めっき層(1)を形成させる工程(a1)と、該工程(a1)の後に、リン濃度が10質量%以上12質量%以下のニッケル-リン合金めっき層(2)を形成させる工程(a2)とを含む、請求項7~10のいずれか1項に記載の積層体の製造方法。
- 前記工程(B)が、置換型金めっき被膜層を形成させる工程(b1)と、該工程(b1)の後に、還元型金めっき被膜層を形成させる工程(b2)とを含む、請求項7~11のいずれか1項に記載の積層体の製造方法。
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