JP7323944B2 - 導電性ペースト - Google Patents
導電性ペースト Download PDFInfo
- Publication number
- JP7323944B2 JP7323944B2 JP2020549189A JP2020549189A JP7323944B2 JP 7323944 B2 JP7323944 B2 JP 7323944B2 JP 2020549189 A JP2020549189 A JP 2020549189A JP 2020549189 A JP2020549189 A JP 2020549189A JP 7323944 B2 JP7323944 B2 JP 7323944B2
- Authority
- JP
- Japan
- Prior art keywords
- copper
- particles
- mass
- conductive paste
- less
- 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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- 239000010949 copper Substances 0.000 claims description 151
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 146
- 229910052802 copper Inorganic materials 0.000 claims description 146
- 239000002245 particle Substances 0.000 claims description 99
- 239000010419 fine particle Substances 0.000 claims description 43
- -1 amine compound Chemical class 0.000 claims description 34
- 239000002904 solvent Substances 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 125000003277 amino group Chemical group 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 4
- 125000001424 substituent group Chemical group 0.000 claims description 4
- 150000001879 copper Chemical class 0.000 description 20
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- 239000011859 microparticle Substances 0.000 description 17
- 239000004020 conductor Substances 0.000 description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 14
- 239000000853 adhesive Substances 0.000 description 13
- 230000001070 adhesive effect Effects 0.000 description 13
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 13
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 12
- 239000003638 chemical reducing agent Substances 0.000 description 11
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- FAXDZWQIWUSWJH-UHFFFAOYSA-N 3-methoxypropan-1-amine Chemical compound COCCCN FAXDZWQIWUSWJH-UHFFFAOYSA-N 0.000 description 8
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 8
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000010304 firing Methods 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 239000002923 metal particle Substances 0.000 description 6
- 239000011164 primary particle Substances 0.000 description 6
- 239000011163 secondary particle Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000003139 primary aliphatic amines Chemical class 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- UODXCYZDMHPIJE-UHFFFAOYSA-N menthanol Chemical compound CC1CCC(C(C)(C)O)CC1 UODXCYZDMHPIJE-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 3
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 3
- HFDWIMBEIXDNQS-UHFFFAOYSA-L copper;diformate Chemical compound [Cu+2].[O-]C=O.[O-]C=O HFDWIMBEIXDNQS-UHFFFAOYSA-L 0.000 description 3
- 238000010908 decantation Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229940116411 terpineol Drugs 0.000 description 3
- DAFHKNAQFPVRKR-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylpropanoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)C DAFHKNAQFPVRKR-UHFFFAOYSA-N 0.000 description 2
- QMGJMGFZLXYHCR-UHFFFAOYSA-N 1-(2-butoxypropoxy)butane Chemical compound CCCCOCC(C)OCCCC QMGJMGFZLXYHCR-UHFFFAOYSA-N 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 2
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- WUGQZFFCHPXWKQ-UHFFFAOYSA-N Propanolamine Chemical compound NCCCO WUGQZFFCHPXWKQ-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- OTBHHUPVCYLGQO-UHFFFAOYSA-N bis(3-aminopropyl)amine Chemical compound NCCCNCCCN OTBHHUPVCYLGQO-UHFFFAOYSA-N 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 150000003141 primary amines Chemical class 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 2
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical compound CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 description 1
- 229940058020 2-amino-2-methyl-1-propanol Drugs 0.000 description 1
- ASUDFOJKTJLAIK-UHFFFAOYSA-N 2-methoxyethanamine Chemical compound COCCN ASUDFOJKTJLAIK-UHFFFAOYSA-N 0.000 description 1
- SOYBEXQHNURCGE-UHFFFAOYSA-N 3-ethoxypropan-1-amine Chemical compound CCOCCCN SOYBEXQHNURCGE-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical group COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical group CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- OPKOKAMJFNKNAS-UHFFFAOYSA-N N-methylethanolamine Chemical group CNCCO OPKOKAMJFNKNAS-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229920003006 Polybutadiene acrylonitrile Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- LHIJANUOQQMGNT-UHFFFAOYSA-N aminoethylethanolamine Chemical compound NCCNCCO LHIJANUOQQMGNT-UHFFFAOYSA-N 0.000 description 1
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 1
- PUHAKHQMSBQAKT-UHFFFAOYSA-L copper;butanoate Chemical compound [Cu+2].CCCC([O-])=O.CCCC([O-])=O PUHAKHQMSBQAKT-UHFFFAOYSA-L 0.000 description 1
- LZJJVTQGPPWQFS-UHFFFAOYSA-L copper;propanoate Chemical compound [Cu+2].CCC([O-])=O.CCC([O-])=O LZJJVTQGPPWQFS-UHFFFAOYSA-L 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- SSJXIUAHEKJCMH-UHFFFAOYSA-N cyclohexane-1,2-diamine Chemical compound NC1CCCCC1N SSJXIUAHEKJCMH-UHFFFAOYSA-N 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical group OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000004455 differential thermal analysis Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009791 electrochemical migration reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229940093915 gynecological organic acid Drugs 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 description 1
- QHJABUZHRJTCAR-UHFFFAOYSA-N n'-methylpropane-1,3-diamine Chemical compound CNCCCN QHJABUZHRJTCAR-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000768 polyamine Chemical class 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000006254 rheological additive Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/562—Protection against mechanical damage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/052—Metallic powder characterised by the size or surface area of the particles characterised by a mixture of particles of different sizes or by the particle size distribution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
- B22F1/056—Submicron particles having a size above 100 nm up to 300 nm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/07—Metallic powder characterised by particles having a nanoscale microstructure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/107—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0425—Copper-based alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/52—Mounting semiconductor bodies in containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L24/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L24/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L24/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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Description
本発明の第一の実施形態は、
(A)平均粒子径が50nm以上400nm以下であり、かつ、結晶子径が20nm以上50nm以下である銅微粒子と、
(B)平均粒子径が0.8μm以上5μm以下であり、かつ、(A)銅微粒子の結晶子径に対する結晶子径の比が1.0以上2.0以下である銅粒子と、
(C)溶剤と、
を含む導電性ペーストである。
本発明の第二の実施形態は、第一の実施形態の導電性ペーストを含む、ダイアタッチ剤である。
本発明の第三の実施形態は、第二の実施形態のダイアタッチ剤を用いて作製された半導体装置である。
本発明の第一の実施形態である導電性ペーストは、(A)平均粒子径が50nm以上400nm以下であり、かつ、結晶子径が20nm以上50nm以下である銅微粒子と、(B)平均粒子径が0.8μm以上5μm以下であり、かつ、(A)銅微粒子の結晶子径に対する結晶子径の比が1.0以上2.0以下である銅粒子と、(C)溶剤とを含む。そのメカニズムは明らかではないが、(A)銅微粒子と(B)銅粒子とを併用し、かつ、(A)銅微粒子の結晶子径と(B)銅粒子の結晶子径との比を特定の値とすることで、得られる導電体にクラックが生じることなく(耐クラック性の向上)、かつ、低抵抗及び高接着強度(ダイシェア強度)の両立を実現することができる。
また、本明細書において、結晶子径は、CuのKα線を線源とした粉末X線回折法による測定から、面指数(111)面ピークの半値幅を求め、Scherrerの式より計算した結果をいう。
また、本明細書において、アスペクト比は、走査型電子顕微鏡(SEM)にて粒子50個を観察した際の粒子の長径と短径との比の平均値をいう。粒子が、板状、鱗片状(フレーク状)等の平板状の形状である場合には、アスペクト比は、粒子の長径と厚さとの比の平均値をいう。
本発明の導電性ペーストは、(A)平均粒子径が50nm以上400nm以下であり、かつ、結晶子径が20nm以上50nm以下である銅微粒子を含む。
本発明の導電性ペーストは、(B)銅粒子を含む。この(B)銅粒子は、平均粒子径が0.8μm以上5μm以下であり、かつ、(A)銅微粒子の結晶子径に対する結晶子径の比が1.0以上2.0以下である。
本発明の導電性ペーストは、(C)溶剤を含む。(C)溶剤は、導電性ペーストの粘度調整等のために含むことができ、これは、導電性ペーストの焼成時に蒸発・気化するものである。
本発明の導電性ペーストは、好ましくは、(D)アミン化合物を含むことができる。(D)アミン化合物を含むことにより、(A)銅微粒子同士の凝集を防ぐことができる。
本発明の導電性ペーストは、本発明の効果を損なわない限り、銅以外の金属粒子をさらに含んでいてもよい。(E)銅以外の金属粒子を構成する金属としては、銀(Ag)、ニッケル(Ni)、パラジウム(Pd)、金(Au)、白金(Pt)及びこれらの合金等が挙げられる。
本発明の導電性ペーストは、その他の添加剤、例えば、分散剤、レオロジー調整剤、顔料などを含有してもよい。
本発明の第二の実施形態であるダイアタッチ剤は、上記第一の実施形態の導電性ペーストを含む。本発明の導電性ペーストをダイアタッチ剤として使用する場合は、リードフレームや基板等に適用し、半導体素子や放熱部材等をマウントし、熱処理することにより、接着を行うことができる。
本発明の第三の実施形態である半導体装置は、上記第二の実施形態のダイアタッチ剤を用いて作製されたものであり、ダイアタッチ剤を熱処理して得られた導電体を含む。第二の実施形態のダイアタッチ剤を、リードフレームや基板等に適用し、半導体素子や放熱部材等をマウントし、熱処理することにより、接着を行なうことができる。熱処理の条件は、上記第一の実施形態である導電性ペーストの欄で記載した条件を適用することができる。次いで、ワイヤボンディングを経て、封止することにより、半導体装置を得ることができる。この半導体装置は、プリント配線基板上にはんだ実装して、各種の電子部品とすることができる。本実施形態において、ダイアタッチ剤を適用した表面が銅であることが、高接着強度(ダイシェア強度)の効果を一層発揮することができるので、好ましい。
以下の成分を、表1に記載した実施例1~4並びに比較例1及び2の割合で混合して導電性ペーストを調製した。なお、表1に示す各成分の割合は、全て質量部で示しており、空欄は未配合であることを意味する。
(A)銅微粒子
反応容器に3-メトキシプロピルアミン400g(4.5mol)を入れ、撹拌しながら反応温度を40℃以下に保持しつつ、ギ酸銅450g(2.0mol)を添加すると、ギ酸銅は濃青色な溶液となって溶解した。そこへヒドラジン100g(2.0mol)をゆっくり滴下し、その間、反応温度を5~60℃に保持すると、ヒドラジンの添加とともに銅微粒子が生成していき、濃青色な溶液が次第に濃茶褐色へと変化した。ヒドラジンを全量滴下して反応を終了させた後、得られた反応混合物に撹拌しながらメタノールを添加し、その後25℃で静置すると二層に分かれた。上層は淡黄色澄明な液であり、下層には茶褐色の(A)銅微粒子が沈降した。上層の液をデカンテーションで除去し、更にメタノール添加と静置、そしてデカンテーションを繰り返して得られたペーストに、2-エチル-1,3-ヘキサンジオール10gを加えて混合し、エバポレーターによって残存するメタノールを留去して、(A)銅微粒子を含む銅含有率90質量%の銅微粒子スラリーを得た。なお、表1に示す(A)銅微粒子の量は、銅成分の量である。また、この銅微粒子スラリーの残り10質量%のうち、2質量%が3-メトキシプロピルアミン、8質量%が2-エチル-1,3-ヘキサンジオールである。このことを、熱重量示差熱分析(TG/DTA)装置を用いて確認した。
EFC-09(福田金属箔粉工業株式会社製)
(B)銅粒子2
CS-10D(三井金属鉱業株式会社製)
(B)銅粒子3
HXR-Cu(日本アトマイズ加工株式会社製)
(B)銅粒子4
DCX-99(DOWAエレクトロニクス株式会社製)
(C)溶剤
2-エチル-1,3-ヘキサンジオール(富士フイルム和光純薬株式会社製)
表1には、上記(A)銅微粒子を含む銅含有率90質量%の銅微粒子スラリー中に含まれる2-エチル-1,3-ヘキサンジオールの他、溶剤が必要な場合には別途添加した2-エチル-1,3-ヘキサンジオールの合計量を記載している。
(D)アミン化合物
3-メトキシプロピルアミン(東京化成工業株式会社)
表1には、上記(A)銅微粒子を含む銅含有率90質量%の銅微粒子スラリー中に含まれる3-メトキシプロピルアミン量を記載している。
平均粒子径は、走査型電子顕微鏡(SEM)にて任意の粒子200個を観察した際の粒子の径の平均値(個数平均値)である。走査型電子顕微鏡(SEM)はS-3400N(株式会社日立ハイテクノロジーズ製)を用いた。
[結晶子径]
結晶子径は、CuのKα線を線源とした粉末X線回折法による測定から、面指数(111)面ピークの半値幅を求め、Scherrerの式より計算した。なお、Scherrer定数は1.33を用いた。X線回折装置としては、Ultima IV(株式会社リガク製)を用いた。
実施例及び比較例の導電性ペーストを、幅5mm、長さ50mm、厚さ0.05mmの形状でガラス基板上に塗布し、非酸化性雰囲気下(窒素水素混合ガス(水素濃度約3~5%))において、室温(25℃)から250℃まで10℃/分の昇温速度で昇温し、250℃で20分間保持することにより焼成して、導電体を形成した。導電体中のクラック発生の有無(薄膜中の収縮の有無)を目視にて観察した。
無:導電体中のクラックの個数が0。
有:導電体中のクラックの個数が1以上。
上記クラック発生の測定で作製した試験片を、比抵抗の測定に使用した。LCRメーターを用い、4端子法で比抵抗(抵抗率)を測定した。
1mm×1mmの金コートシリコンチップを、実施例及び比較例の導電性ペーストを用いて、銅リードフレーム上にマウントし、非酸化性雰囲気下(窒素水素混合ガス(水素濃度約3~5%))において、室温(25℃)から250℃まで10℃/分の昇温速度で昇温し、250℃で20分間保持することにより、焼成した。焼成後、ボンドテスターを用いて、室温(25℃)でダイシェア強度を測定した。ボンドテスターは4000万能型ボンドテスター(Nordson DAGE社製)を用いた。
本明細書に記載された全ての文献、特許出願、および技術規格は、個々の文献、特許出願、および技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書に参照により取り込まれる。
Claims (9)
- (A)平均粒子径が50nm以上400nm以下であり、かつ、結晶子径が20nm以上40nm以下である銅微粒子と、
(B)平均粒子径が0.8μm以上5μm以下であり、かつ、(A)銅微粒子の結晶子径に対する結晶子径の比が1.0以上2.0以下である銅粒子と、
(C)溶剤と、
を含む導電性ペースト。 - (B)銅粒子のアスペクト比が1.0以上2.0以下である、請求項1に記載の導電性ペースト。
- さらに(D)アミン化合物を含む、請求項1又は2に記載の導電性ペースト。
- (B)銅粒子の含有量が、(A)銅微粒子及び(B)銅粒子の合計100質量部に対して、20質量部以上80質量部以下である、請求項1~3のいずれか1項に記載の導電性ペースト。
- (C)溶剤の含有量が、(A)銅微粒子及び(B)銅粒子の合計100質量部に対して、3質量部以上60質量部以下である、請求項1~4のいずれか1項に記載の導電性ペースト。
- (D)アミン化合物が、式:NHR 1 R 4 (式中、R 1 は、水酸基、メトキシ基、エトキシ基及びアミノ基からなる群より選択される置換基の1個で置換されている炭素数2~4の直鎖状又は分岐状のアルキル基を表し、R 4 は、水素であるか、又はアミノ基で置換されていてもよい炭素数1~3のアルキル基を表す。)で示されるアミン化合物である、請求項3に記載の導電性ペースト。
- 請求項1~5のいずれか1項に記載の導電性ペーストを含む、ダイアタッチ剤。
- 請求項7に記載のダイアタッチ剤を用いて作製された半導体装置。
- 請求項7に記載のダイアタッチ剤を適用した表面が銅である、請求項8記載の半導体装置。
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US11817398B2 (en) | 2023-11-14 |
EP3859751A4 (en) | 2022-07-06 |
EP3859751A1 (en) | 2021-08-04 |
TW202018017A (zh) | 2020-05-16 |
KR20210066836A (ko) | 2021-06-07 |
CN112771628B (zh) | 2022-09-13 |
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