JP2008266668A - 無電解金めっき方法及び電子部品 - Google Patents
無電解金めっき方法及び電子部品 Download PDFInfo
- Publication number
- JP2008266668A JP2008266668A JP2007107198A JP2007107198A JP2008266668A JP 2008266668 A JP2008266668 A JP 2008266668A JP 2007107198 A JP2007107198 A JP 2007107198A JP 2007107198 A JP2007107198 A JP 2007107198A JP 2008266668 A JP2008266668 A JP 2008266668A
- Authority
- JP
- Japan
- Prior art keywords
- gold plating
- electroless
- electroless gold
- film
- plating film
- 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.)
- Granted
Links
- 238000007747 plating Methods 0.000 title claims abstract description 213
- 238000000034 method Methods 0.000 title claims abstract description 36
- 229910052737 gold Inorganic materials 0.000 claims abstract description 156
- 239000010931 gold Substances 0.000 claims abstract description 156
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 155
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 80
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 40
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 34
- DETXZQGDWUJKMO-UHFFFAOYSA-N 2-hydroxymethanesulfonic acid Chemical compound OCS(O)(=O)=O DETXZQGDWUJKMO-UHFFFAOYSA-N 0.000 claims abstract description 28
- -1 amine compound Chemical class 0.000 claims abstract description 21
- 239000008139 complexing agent Substances 0.000 claims abstract description 12
- 150000002344 gold compounds Chemical class 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 6
- 238000005476 soldering Methods 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract 2
- 239000000654 additive Substances 0.000 abstract 1
- 230000000996 additive effect Effects 0.000 abstract 1
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- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 10
- 230000008021 deposition Effects 0.000 description 10
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- 230000007423 decrease Effects 0.000 description 8
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- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
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- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 235000010338 boric acid Nutrition 0.000 description 2
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 2
- 229940018557 citraconic acid Drugs 0.000 description 2
- 235000015165 citric acid Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000001530 fumaric acid Substances 0.000 description 2
- IZLAVFWQHMDDGK-UHFFFAOYSA-N gold(1+);cyanide Chemical compound [Au+].N#[C-] IZLAVFWQHMDDGK-UHFFFAOYSA-N 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
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- HNEGQIOMVPPMNR-NSCUHMNNSA-N mesaconic acid Chemical compound OC(=O)C(/C)=C/C(O)=O HNEGQIOMVPPMNR-NSCUHMNNSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 2
- HNEGQIOMVPPMNR-UHFFFAOYSA-N methylfumaric acid Natural products OC(=O)C(C)=CC(O)=O HNEGQIOMVPPMNR-UHFFFAOYSA-N 0.000 description 2
- TXXHDPDFNKHHGW-UHFFFAOYSA-N muconic acid Chemical compound OC(=O)C=CC=CC(O)=O TXXHDPDFNKHHGW-UHFFFAOYSA-N 0.000 description 2
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- KIDHWZJUCRJVML-UHFFFAOYSA-N putrescine Chemical compound NCCCCN KIDHWZJUCRJVML-UHFFFAOYSA-N 0.000 description 2
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
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- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 235000013985 cinnamic acid Nutrition 0.000 description 1
- GTZCVFVGUGFEME-IWQZZHSRSA-N cis-aconitic acid Chemical compound OC(=O)C\C(C(O)=O)=C\C(O)=O GTZCVFVGUGFEME-IWQZZHSRSA-N 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229940075933 dithionate Drugs 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- BEFDCLMNVWHSGT-UHFFFAOYSA-N ethenylcyclopentane Chemical compound C=CC1CCCC1 BEFDCLMNVWHSGT-UHFFFAOYSA-N 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- DEFVIWRASFVYLL-UHFFFAOYSA-N ethylene glycol bis(2-aminoethyl)tetraacetic acid Chemical compound OC(=O)CN(CC(O)=O)CCOCCOCCN(CC(O)=O)CC(O)=O DEFVIWRASFVYLL-UHFFFAOYSA-N 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 235000013922 glutamic acid Nutrition 0.000 description 1
- 239000004220 glutamic acid Substances 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
- 150000004679 hydroxides Chemical class 0.000 description 1
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical compound OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- LDHQCZJRKDOVOX-IHWYPQMZSA-N isocrotonic acid Chemical compound C\C=C/C(O)=O LDHQCZJRKDOVOX-IHWYPQMZSA-N 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 229940046892 lead acetate Drugs 0.000 description 1
- LQBJWKCYZGMFEV-UHFFFAOYSA-N lead tin Chemical compound [Sn].[Pb] LQBJWKCYZGMFEV-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- RTWNYYOXLSILQN-UHFFFAOYSA-N methanediamine Chemical compound NCN RTWNYYOXLSILQN-UHFFFAOYSA-N 0.000 description 1
- AFVFQIVMOAPDHO-UHFFFAOYSA-M methanesulfonate group Chemical class CS(=O)(=O)[O-] AFVFQIVMOAPDHO-UHFFFAOYSA-M 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- IMAKHNTVDGLIRY-UHFFFAOYSA-N methyl prop-2-ynoate Chemical compound COC(=O)C#C IMAKHNTVDGLIRY-UHFFFAOYSA-N 0.000 description 1
- 239000000178 monomer Substances 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
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 1
- 229960003330 pentetic acid Drugs 0.000 description 1
- QIWKUEJZZCOPFV-UHFFFAOYSA-N phenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1 QIWKUEJZZCOPFV-UHFFFAOYSA-N 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 150000003109 potassium Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- ALVGPPOPGPCDCG-UHFFFAOYSA-M potassium;formaldehyde;hydrogen sulfite Chemical compound [K+].O=C.OS([O-])=O ALVGPPOPGPCDCG-UHFFFAOYSA-M 0.000 description 1
- NRTDAKURTMLAFN-UHFFFAOYSA-N potassium;gold(3+);tetracyanide Chemical compound [K+].[Au+3].N#[C-].N#[C-].N#[C-].N#[C-] NRTDAKURTMLAFN-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- UORVCLMRJXCDCP-UHFFFAOYSA-N propynoic acid Chemical compound OC(=O)C#C UORVCLMRJXCDCP-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- VMDSWYDTKFSTQH-UHFFFAOYSA-N sodium;gold(1+);dicyanide Chemical compound [Na+].[Au+].N#[C-].N#[C-] VMDSWYDTKFSTQH-UHFFFAOYSA-N 0.000 description 1
- UOULCEYHQNCFFH-UHFFFAOYSA-M sodium;hydroxymethanesulfonate Chemical compound [Na+].OCS([O-])(=O)=O UOULCEYHQNCFFH-UHFFFAOYSA-M 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 150000003567 thiocyanates Chemical class 0.000 description 1
- UVZICZIVKIMRNE-UHFFFAOYSA-N thiodiacetic acid Chemical compound OC(=O)CSCC(O)=O UVZICZIVKIMRNE-UHFFFAOYSA-N 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- UIERETOOQGIECD-ONEGZZNKSA-N tiglic acid Chemical compound C\C=C(/C)C(O)=O UIERETOOQGIECD-ONEGZZNKSA-N 0.000 description 1
- UAXOELSVPTZZQG-UHFFFAOYSA-N tiglic acid Natural products CC(C)=C(C)C(O)=O UAXOELSVPTZZQG-UHFFFAOYSA-N 0.000 description 1
- GTZCVFVGUGFEME-UHFFFAOYSA-N trans-aconitic acid Natural products OC(=O)CC(C(O)=O)=CC(O)=O GTZCVFVGUGFEME-UHFFFAOYSA-N 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
- H05K3/244—Finish plating of conductors, especially of copper conductors, e.g. for pads or lands
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- 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
- H05K3/10—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
- H05K3/18—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 precipitation techniques to apply the conductive 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
- 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
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- C—CHEMISTRY; METALLURGY
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- 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
- C23C18/42—Coating with noble metals
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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
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- 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
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Abstract
【効果】フラッシュ金めっき浴と、厚付け金めっき浴の2種類の浴を準備する必要がなく、1種の金めっき浴で、はんだ接合向け又はワイヤボンディング向けとして好適とされる様々な膜厚の金めっき皮膜を形成することができ、特に、膜厚0.15μm以上の無電解金めっき皮膜を、1種のめっき浴で、1工程で効率よく、有効に形成することができることから、工程の簡略化が可能であり、コスト的に有利である。
【選択図】なし
Description
水溶性金化合物と、錯化剤と、ホルムアルデヒド及び/又はホルムアルデヒド重亜硫酸塩付加物と、下記一般式(1)又は(2)
R1−NH−C2H4−NH−R2 (1)
R3−(CH2−NH−C2H4−NH−CH2)n−R4 (2)
(式(1)及び(2)中、R1、R2、R3及びR4は−OH、−CH3、−CH2OH、−C2H4OH、−CH2N(CH3)2、−CH2NH(CH2OH)、−CH2NH(C2H4OH)、−C2H4NH(CH2OH)、−C2H4NH(C2H4OH)、−CH2N(CH2OH)2、−CH2N(C2H4OH)2、−C2H4N(CH2OH)2又は−C2H4N(C2H4OH)2を表し、同じであっても異なっていてもよい。nは1〜4の整数である。)
で表されるアミン化合物とを含有する無電解金めっき浴を用いた無電解金めっきにより形成することにより、無電解金めっき皮膜をはんだ接合向け又はワイヤボンディング向けとして好適とされる様々な膜厚に対して1種のめっき浴で効率よく形成することができ、特に、はんだ接合及びワイヤボンディング向け、又はワイヤボンディング向けとして好適な膜厚0.15μm以上の無電解金めっき皮膜を、1種のめっき浴で、1工程で効率よく、有効に形成することができることを見出し、本発明をなすに至った。
[1] プリント配線板、セラミクス基板又は半導体基板である電子部品の被めっき面上に、触媒を介して膜厚0.1〜20μmの無電解ニッケルめっき皮膜が形成され、該無電解ニッケルめっき皮膜上に膜厚0.001〜0.3μmの無電解パラジウムめっき皮膜が形成され、更に該無電解パラジウムめっき皮膜上に膜厚0.01〜1.0μmの無電解金めっき皮膜が形成されためっき皮膜積層体の上記無電解金めっき皮膜を形成する方法であって、
水溶性金化合物と、錯化剤と、ホルムアルデヒド及び/又はホルムアルデヒド重亜硫酸塩付加物と、下記一般式(1)又は(2)
R1−NH−C2H4−NH−R2 (1)
R3−(CH2−NH−C2H4−NH−CH2)n−R4 (2)
(式(1)及び(2)中、R1、R2、R3及びR4は−OH、−CH3、−CH2OH、−C2H4OH、−CH2N(CH3)2、−CH2NH(CH2OH)、−CH2NH(C2H4OH)、−C2H4NH(CH2OH)、−C2H4NH(C2H4OH)、−CH2N(CH2OH)2、−CH2N(C2H4OH)2、−C2H4N(CH2OH)2又は−C2H4N(C2H4OH)2を表し、同じであっても異なっていてもよい。nは1〜4の整数である。)
で表されるアミン化合物とを含有する無電解金めっき浴を用いた第1の無電解金めっきにより上記無電解金めっき皮膜の一部又は全部を形成することを特徴とする無電解金めっき方法。
[2] 上記第1の無電解金めっきのみにより、上記無電解金めっき皮膜の全部を膜厚0.15μm以上に形成することを特徴とする[1]記載の無電解金めっき方法。
[3] 上記第1の無電解金めっき浴を用いた無電解金めっきにより、上記無電解金めっき皮膜の一部を形成し、次いで、上記無電解金めっき浴と異なる還元型金めっき浴を用いた第2の無電解金めっきにより上記無電解金めっき皮膜の残部を形成することを特徴とする[1]記載の無電解金めっき方法。
[4] 上記無電解金めっき皮膜表面が、被はんだ接合面をなすことを特徴とする[1]〜[3]のいずれかに記載の無電解金めっき方法。
[5] 上記無電解金めっき皮膜表面が、ワイヤボンディング面をなすことを特徴とする[2]又は[3]記載の無電解金めっき方法。
[6] [1]〜[5]のいずれかに記載の無電解金めっき方法で無電解金めっき皮膜を形成したことを特徴とする電子部品。
本発明の無電解金めっき方法は、電子部品の被めっき面上に、触媒を介して膜厚0.1〜20μmの無電解ニッケルめっき皮膜が形成され、該無電解ニッケルめっき皮膜上に膜厚0.001〜0.3μmの無電解パラジウムめっき皮膜が形成され、更に該無電解パラジウムめっき皮膜上に膜厚0.01〜1.0μmの無電解金めっき皮膜が形成されためっき皮膜積層体の無電解金めっき皮膜を形成する方法である。
R1−NH−C2H4−NH−R2 (1)
R3−(CH2−NH−C2H4−NH−CH2)n−R4 (2)
(式(1)及び(2)中、R1、R2、R3及びR4は−OH、−CH3、−CH2OH、−C2H4OH、−CH2N(CH3)2、−CH2NH(CH2OH)、−CH2NH(C2H4OH)、−C2H4NH(CH2OH)、−C2H4NH(C2H4OH)、−CH2N(CH2OH)2、−CH2N(C2H4OH)2、−C2H4N(CH2OH)2又は−C2H4N(C2H4OH)2を表し、同じであっても異なっていてもよい。nは1〜4の整数である。)
で表されるアミン化合物とを含有する無電解金めっき浴を用いた第1の無電解金めっきにより上記無電解金めっき皮膜の一部又は全部を形成する。
R1−NH−C2H4−NH−R2 (1)
R3−(CH2−NH−C2H4−NH−CH2)n−R4 (2)
(式(1)及び(2)中、R1、R2、R3及びR4は−OH、−CH3、−CH2OH、−C2H4OH、−CH2N(CH3)2、−CH2NH(CH2OH)、−CH2NH(C2H4OH)、−C2H4NH(CH2OH)、−C2H4NH(C2H4OH)、−CH2N(CH2OH)2、−CH2N(C2H4OH)2、−C2H4N(CH2OH)2又は−C2H4N(C2H4OH)2を表し、同じであっても異なっていてもよい。nは1〜4の整数である。)
で表されるアミン化合物を含有する。本発明のホルムアルデヒド及び/又はホルムアルデヒド重亜硫酸塩付加物は、ホルムアルデヒド及び/又はホルムアルデヒド重亜硫酸塩付加物みでは還元剤として作用せず、このアミン化合物と共存することで還元作用が生じる。
表1に示される無電解ニッケルめっき浴、無電解パラジウムめっき浴及び無電解金めっき浴を用いて、表2に示される条件で、基板に各めっきを施して形成しためっき皮膜積層体のワイヤボンディング特性とはんだ接合性を下記の方法で評価した。各皮膜の膜厚並びにワイヤボンディング特性及びはんだ接合性の評価結果を表1に示す。
Dage社製ボンドテスタSERIES4000により1条件につき20点評価した。破壊モードのはんだ破断率を表1に示す。なお、測定条件は以下のとおりである。通常、はんだ破断率が85%以上が「良」、85%未満が「不良」とされる。
測定方式:ボールプルテスト
基板:上村工業(株)製BGA基板(パット径 φ0.5mm)
半田ボール:千住金属製 φ0.6mm Sn−3.0Ag−0.5Cu
リフロー装置:タムラ製作所製 TMR−15−22LH
リフロー条件:Top 260℃
リフロー環境:Air
リフロー回数:1回及び5回
フラックス:千住金属製 529D−1(RMAタイプ)
テストスピード:5000μm/秒
半田マウント後エージング:1時間
TPT社製セミオートマチックワイヤボンダHB16によりワイヤボンディングを行い、Dage社製ボンドテスタSERIES4000により1条件につき20点評価した。W/B(ワイヤボンディング)平均強度および変動係数を表1に示す。なお、測定条件は以下のとおりである。通常、W/B平均強度においては、8g以上が「良」、8g未満が「不良」とされ、CVにおいては、15%以下が「良」、15%を超えると「不良」とされる。
キャピラリー:B1014−51−18−12(PECO)
ワイヤ:1Mil−Gold
ステージ温度:150℃
超音波(mW):250(1st),250(2nd)
ボンディング時間:(ミリ秒):200(1st),50(2nd)
引っ張り力(gf):25(1st),50(2nd)
ステップ(第1から第2への長さ):0.700mm
測定方式:ワイヤープルテスト
基板:上村工業(株)BGA基板
テストスピード:170μm/秒
Claims (6)
- プリント配線板、セラミクス基板又は半導体基板である電子部品の被めっき面上に、触媒を介して膜厚0.1〜20μmの無電解ニッケルめっき皮膜が形成され、該無電解ニッケルめっき皮膜上に膜厚0.001〜0.3μmの無電解パラジウムめっき皮膜が形成され、更に該無電解パラジウムめっき皮膜上に膜厚0.01〜1.0μmの無電解金めっき皮膜が形成されためっき皮膜積層体の上記無電解金めっき皮膜を形成する方法であって、
水溶性金化合物と、錯化剤と、ホルムアルデヒド及び/又はホルムアルデヒド重亜硫酸塩付加物と、下記一般式(1)又は(2)
R1−NH−C2H4−NH−R2 (1)
R3−(CH2−NH−C2H4−NH−CH2)n−R4 (2)
(式(1)及び(2)中、R1、R2、R3及びR4は−OH、−CH3、−CH2OH、−C2H4OH、−CH2N(CH3)2、−CH2NH(CH2OH)、−CH2NH(C2H4OH)、−C2H4NH(CH2OH)、−C2H4NH(C2H4OH)、−CH2N(CH2OH)2、−CH2N(C2H4OH)2、−C2H4N(CH2OH)2又は−C2H4N(C2H4OH)2を表し、同じであっても異なっていてもよい。nは1〜4の整数である。)
で表されるアミン化合物とを含有する無電解金めっき浴を用いた第1の無電解金めっきにより上記無電解金めっき皮膜の一部又は全部を形成することを特徴とする無電解金めっき方法。 - 上記第1の無電解金めっきのみにより、上記無電解金めっき皮膜の全部を膜厚0.15μm以上に形成することを特徴とする請求項1記載の無電解金めっき方法。
- 上記第1の無電解金めっき浴を用いた無電解金めっきにより、上記無電解金めっき皮膜の一部を形成し、次いで、上記無電解金めっき浴と異なる還元型金めっき浴を用いた第2の無電解金めっきにより上記無電解金めっき皮膜の残部を形成することを特徴とする請求項1記載の無電解金めっき方法。
- 上記無電解金めっき皮膜表面が、被はんだ接合面をなすことを特徴とする請求項1〜3のいずれか1項記載の無電解金めっき方法。
- 上記無電解金めっき皮膜表面が、ワイヤボンディング面をなすことを特徴とする請求項2又は3記載の無電解金めっき方法。
- 請求項1〜5のいずれか1項記載の無電解金めっき方法で無電解金めっき皮膜を形成したことを特徴とする電子部品。
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CN101469420B (zh) | 2012-10-03 |
CN101469420A (zh) | 2009-07-01 |
JP5013077B2 (ja) | 2012-08-29 |
US20080277140A1 (en) | 2008-11-13 |
TW200905013A (en) | 2009-02-01 |
KR20080093366A (ko) | 2008-10-21 |
KR101431491B1 (ko) | 2014-08-20 |
TWI424085B (zh) | 2014-01-21 |
US8124174B2 (en) | 2012-02-28 |
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