JP4904252B2 - 半導体装置用ボンディングワイヤ - Google Patents
半導体装置用ボンディングワイヤ Download PDFInfo
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- JP4904252B2 JP4904252B2 JP2007312429A JP2007312429A JP4904252B2 JP 4904252 B2 JP4904252 B2 JP 4904252B2 JP 2007312429 A JP2007312429 A JP 2007312429A JP 2007312429 A JP2007312429 A JP 2007312429A JP 4904252 B2 JP4904252 B2 JP 4904252B2
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- bonding
- wire
- bonding wire
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- copper
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000010949 copper Substances 0.000 claims abstract description 45
- 229910052802 copper Inorganic materials 0.000 claims abstract description 44
- 239000011162 core material Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 230000003647 oxidation Effects 0.000 claims abstract description 24
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 24
- 239000013078 crystal Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 13
- 229910052763 palladium Inorganic materials 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- 229910052703 rhodium Inorganic materials 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 53
- 230000006378 damage Effects 0.000 description 45
- 238000000034 method Methods 0.000 description 34
- 238000011156 evaluation Methods 0.000 description 17
- 238000007747 plating Methods 0.000 description 17
- 239000010408 film Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 14
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 12
- 230000007423 decrease Effects 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 239000010931 gold Substances 0.000 description 9
- 230000007774 longterm Effects 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 230000002950 deficient Effects 0.000 description 8
- 239000000758 substrate Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 7
- 230000000996 additive effect Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000001953 recrystallisation Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 238000007772 electroless plating Methods 0.000 description 4
- 238000009713 electroplating Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000011295 pitch Substances 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 238000010301 surface-oxidation reaction Methods 0.000 description 4
- 238000005491 wire drawing Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 238000000682 scanning probe acoustic microscopy Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 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
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Description
であり、かつ
C断面の粒子数がN個/μm 2 以下であって、C断面の平均結晶粒径がGμm以上であり、前記N及びGは、
N=(−0.01×R+0.7)
G=(0.02×R+0.8)
であることを特徴とする半導体装置用ボンディングワイヤである。
以下、本発明の好適な実施形態について説明する。ボンディングワイヤについて、銅を主成分とする芯材と、耐酸化性金属を含有する外層で構成されたものを検討した結果、ワイヤの表面近傍に耐酸化性金属を含有することにより、ウェッジ接合性の向上などが期待できる反面、ボールの不安定形成、リフロー工程でのウェッジ接合部の破断が新たな問題となることなどが判明した。そこで、狭ピッチの小ボール接合などの新たな実装ニーズへの対応、量産性の更なる向上などにも対応できる銅系ボンディングワイヤを検討した結果、外層を有し、特定の厚さ範囲にすることが有効であることを見出した。更に、外層および芯材などの組成、構造などの制御が有効であることを見出した。
以下、本発明の実施例について説明する。実施例として、請求項1〜4に係るボンディングワイヤを、三種の線径(φ20μm、φ33μm、φ50μm)について作製し、作製したボンディングワイヤについて、平均結晶粒径G及び粒子数Nを測定した。また、上記実施例の効果を確認するため、比較例を作製した。実施例の作製方法及び分析方法は、以下の通りである。
Claims (3)
- 銅を主成分とする芯材と、
前記芯材の上に設けられた、20nm以上150nm以下の厚さの耐酸化性金属からなる外層と
を有する半導体装置用ボンディングワイヤであって、
0.2%耐力が0.07mN/μm2以上0.14mN/μm2以下、最大耐力が0.20mN/μm2以上0.28mN/μm2以下、及び、単位断面積当たりの伸び値(%/μm2)がε1以上ε2以下であり、前記ε1及び前記ε2は、ワイヤの線径をRとすると、
ε1=(−0.001×R+0.055)
ε2=(−0.001×R+0.068)
であり、かつ、
C断面の粒子数がN個/μm 2 以下であって、C断面の平均結晶粒径がGμm以上であり、前記N及びGは、
N=(−0.01×R+0.7)
G=(0.02×R+0.8)
であることを特徴とする半導体装置用ボンディングワイヤ。 - 前記耐酸化性金属が、Pd,Pt,及び、Rhから選ばれる1種以上の元素を主成分とすることを特徴とする請求項1記載の半導体装置用ボンディングワイヤ。
- 前記芯材が、P,B,Bi,Sn,Ag,及び、Mgから選ばれる1種以上の元素を含有し、ワイヤ全体に占める該元素濃度が総計で0.0001mol%以上0.03mol%以下の範囲であることを特徴とする請求項1記載の半導体装置用ボンディングワイヤ。
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SG2013016415A (en) * | 2013-03-05 | 2014-10-30 | Heraeus Materials Singapore Pte Ltd | Coated copper wire for bonding applications |
SG2013016381A (en) * | 2013-03-05 | 2014-10-30 | Heraeus Materials Singapore Pte Ltd | Coated copper wire for bonding applications |
SG2013016399A (en) * | 2013-03-05 | 2014-10-30 | Heraeus Materials Singapore Pte Ltd | Coated copper wire for bonding applications |
KR101989799B1 (ko) * | 2013-05-03 | 2019-06-17 | 헤라우스 매터리얼즈 싱가포르 피티이 엘티디 | 구리 본드 와이어 및 이를 만드는 방법 |
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