JP4327657B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP4327657B2 JP4327657B2 JP2004150726A JP2004150726A JP4327657B2 JP 4327657 B2 JP4327657 B2 JP 4327657B2 JP 2004150726 A JP2004150726 A JP 2004150726A JP 2004150726 A JP2004150726 A JP 2004150726A JP 4327657 B2 JP4327657 B2 JP 4327657B2
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- Prior art keywords
- film
- solder ball
- semiconductor device
- wiring
- conductive 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.)
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 44
- 229910000679 solder Inorganic materials 0.000 claims abstract description 110
- 239000011347 resin Substances 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims description 60
- 229910045601 alloy Inorganic materials 0.000 claims description 52
- 239000000956 alloy Substances 0.000 claims description 52
- 229910052751 metal Inorganic materials 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 41
- 230000004888 barrier function Effects 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 239000010953 base metal Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 229920002577 polybenzoxazole Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 33
- 230000008569 process Effects 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 17
- 239000000463 material Substances 0.000 description 10
- 238000002161 passivation Methods 0.000 description 10
- 238000005530 etching Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 6
- 229910052718 tin Inorganic materials 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 230000008646 thermal stress Effects 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- HBVFXTAPOLSOPB-UHFFFAOYSA-N nickel vanadium Chemical compound [V].[Ni] HBVFXTAPOLSOPB-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
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-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
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Description
図1は、第一の実施形態に係る半導体装置の要部を示す図である。
a:絶縁樹脂層105と接触する面における半田ボール108の端部とビア104の上部周縁との間の距離
b:ビア104の深さ(キャップ層102上面から絶縁樹脂層105上面までの距離)
c:UBM膜107の端部とビア104の上部周縁との間の距離
d:絶縁樹脂層105の厚み
0<a/b≦2
0<c/b≦1.3
dが、約7μmである。
TiW膜113:100〜500nm
Ti膜112:10〜200nm
本実施形態では、TiW膜113を200nm、Ti膜112を30nmとした。
また、図7に示したように、半田ボール108は、UBM膜107を含むパッド全体を覆うように形成され、UBM膜107、Cu膜111およびバリアメタル膜106の端面が半田ボール108により被覆される。上記工程で、マスクの開口を、パッドより広く設定することでこのような構造が実現される。
本実施形態では、第一の実施の形態と異なるプロセスによりバンプ構造を形成する例を示す。
TiW膜113:100〜500nm
Ti膜112:10〜200nm
Cu膜111:100〜500nm
Ni膜115:2〜5μm
Cu膜114:200〜500nm
また、上記実施の形態では、半田ボール108が合金層110を覆う構成としたが、図21に示すように、合金層110が半田ボール108に覆われず外部に露出する構成としてもよい。
半田材料:Sn、Ag、Cuを含む鉛フリー半田
リフロー条件:
ピーク温度を260℃、ピーク温度保持時間を1分、入炉から出炉までの時間を15分とした。
なお、ピーク温度は220〜260℃、入炉から出炉までの時間は10〜15分の範囲から適宜選択することができる。
a:絶縁樹脂層105と接触する面における半田ボール108の端部とビア104の上部周縁との間の距離
b:ビア104の深さ(キャップ層102上面から絶縁樹脂層105上面までの距離)
c:UBM膜107の端部とビア104の上部周縁との間の距離
d:絶縁樹脂層105の厚み
0<a/b≦2、
0<c/b≦1.3
を満たすとき、良好な結果が得られることが明らかになった。
103 パッシベーション膜
104 ビア
105 絶縁樹脂層
106 バリアメタル膜
107 UBM膜
108 半田ボール
110 合金層
111 Cu膜
112 Ti膜
113 TiW膜
114 Cu膜
115 Ni膜
Claims (7)
- 配線と、
該配線上に設けられ、前記配線に到達する孔の設けられた絶縁膜と、
前記孔の底部において前記配線に接するとともに前記孔の底部から前記孔の外部にわたって形成された導電膜と、
前記導電膜を覆うように形成され、且つ、前記導電膜に接して設けられた半田ボールと、
を備え、
前記導電膜は、前記半田ボールと接するボール下地金属膜と、前記配線と前記ボール下地金属膜との間に設けられたバリアメタル膜とを含み、
前記絶縁膜と接触する面における半田ボールの端部と前記孔の上部周縁との間の距離をaとし、前記孔の深さをbとしたとき、a/bの値が2以下であり、
前記半田ボールと前記導電膜との間に、前記半田ボールに含まれる第一の金属元素と前記導電膜に含まれる第二の金属元素とを含む合金層を有し、
前記合金層は、前記ボール下地金属膜の側面にも形成され、
前記半田ボールが前記合金層の全体を覆い、且つ、該半田ボールの端部が前記合金層及び前記導電膜の周囲において前記絶縁膜に接していることを特徴とする半導体装置。 - 配線と、
該配線上に設けられた保護膜と該保護膜上に設けられた応力緩和樹脂層とがこの順で積層してなり、前記配線に到達する孔の設けられた絶縁膜と、
前記孔の底部において前記配線に接するとともに前記孔の底部から前記孔の外部にわたって形成された導電膜と、
前記導電膜を覆うように形成され、且つ、前記導電膜に接して設けられた半田ボールと、
を備え、
前記導電膜は、前記半田ボールと接するボール下地金属膜と、前記配線と前記ボール下地金属膜との間に設けられたバリアメタル膜とを含み、
前記ボール下地金属膜の端部と前記孔の上部周縁との間の距離をcとし、前記孔の深さをbとしたとき、c/bの値が1.3以下であり、
前記半田ボールと前記導電膜との間に、前記半田ボールに含まれる第一の金属元素と前記導電膜に含まれる第二の金属元素とを含む合金層を有し、
前記合金層は、前記ボール下地金属膜の側面にも形成され、
前記半田ボールが前記合金層の全体を覆い、且つ、該半田ボールの端部が前記合金層及び前記導電膜の周囲において前記絶縁膜の前記応力緩和樹脂層に接していることを特徴とする半導体装置。 - 請求項1または2に記載の半導体装置において、
前記絶縁膜は、前記配線上に設けられた保護膜と、該保護膜の上に設けられた応力緩和樹脂層とを含み、前記応力緩和樹脂層の弾性率が、1GPa以上5GPa以下であることを特徴とする半導体装置。 - 請求項3に記載の半導体装置において、
前記応力緩和樹脂層が、ポリイミドまたはポリベンゾオキサゾールであることを特徴とする半導体装置。 - 請求項3または4に記載の半導体装置において、
前記応力緩和樹脂層の厚みが、1μm以上10μm以下であることを特徴とする半導体装置。 - 請求項1乃至5いずれかに記載の半導体装置において、
前記半田ボールがSnを含む鉛フリー半田からなることを特徴とする半導体装置。 - 請求項1乃至6いずれかに記載の半導体装置において、
前記導電膜の表面部分は、銅またはニッケルを含むことを特徴とする半導体装置。
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JP2004150726A JP4327657B2 (ja) | 2004-05-20 | 2004-05-20 | 半導体装置 |
TW094115814A TWI278901B (en) | 2004-05-20 | 2005-05-16 | Semiconductor device |
KR1020050041643A KR100687274B1 (ko) | 2004-05-20 | 2005-05-18 | 반도체장치 |
CNB200510072745XA CN100438003C (zh) | 2004-05-20 | 2005-05-19 | 半导体器件 |
US11/133,279 US7221054B2 (en) | 2004-05-20 | 2005-05-20 | Bump structure |
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JP4611943B2 (ja) * | 2006-07-13 | 2011-01-12 | Okiセミコンダクタ株式会社 | 半導体装置 |
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US7713860B2 (en) * | 2007-10-13 | 2010-05-11 | Wan-Ling Yu | Method of forming metallic bump on I/O pad |
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JP5126002B2 (ja) * | 2008-11-11 | 2013-01-23 | セイコーエプソン株式会社 | 半導体装置及び半導体装置の製造方法 |
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