JP4704679B2 - 半導体素子のアンダーバンプ金属 - Google Patents
半導体素子のアンダーバンプ金属 Download PDFInfo
- Publication number
- JP4704679B2 JP4704679B2 JP2003514622A JP2003514622A JP4704679B2 JP 4704679 B2 JP4704679 B2 JP 4704679B2 JP 2003514622 A JP2003514622 A JP 2003514622A JP 2003514622 A JP2003514622 A JP 2003514622A JP 4704679 B2 JP4704679 B2 JP 4704679B2
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- Prior art keywords
- copper
- layer
- tin
- nickel
- chromium
- 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 description 31
- 229910052751 metal Inorganic materials 0.000 title claims description 15
- 239000002184 metal Substances 0.000 title claims description 15
- 239000010949 copper Substances 0.000 claims description 60
- 239000010410 layer Substances 0.000 claims description 60
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 56
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 51
- 229910052802 copper Inorganic materials 0.000 claims description 48
- 229910000679 solder Inorganic materials 0.000 claims description 38
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 36
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 22
- 229910052804 chromium Inorganic materials 0.000 claims description 22
- 239000011651 chromium Substances 0.000 claims description 22
- 229910052759 nickel Inorganic materials 0.000 claims description 22
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 8
- 239000010931 gold Substances 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 17
- 239000000956 alloy Substances 0.000 description 16
- 239000000758 substrate Substances 0.000 description 16
- 229910045601 alloy Inorganic materials 0.000 description 15
- 239000000463 material Substances 0.000 description 15
- 230000004888 barrier function Effects 0.000 description 13
- 150000003624 transition metals Chemical class 0.000 description 13
- 239000011133 lead Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 11
- 229910001128 Sn alloy Inorganic materials 0.000 description 10
- 230000008901 benefit Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000003870 refractory metal Substances 0.000 description 8
- 229910000990 Ni alloy Inorganic materials 0.000 description 7
- 238000005253 cladding Methods 0.000 description 7
- 229910052723 transition metal Inorganic materials 0.000 description 7
- 229910017482 Cu 6 Sn 5 Inorganic materials 0.000 description 6
- 238000002161 passivation Methods 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- ZTXONRUJVYXVTJ-UHFFFAOYSA-N chromium copper Chemical compound [Cr][Cu][Cr] ZTXONRUJVYXVTJ-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 230000006911 nucleation Effects 0.000 description 4
- 238000010899 nucleation Methods 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 229910052787 antimony Inorganic materials 0.000 description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical class [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000007607 die coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005477 sputtering target Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010010957 Copper deficiency Diseases 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910018100 Ni-Sn Inorganic materials 0.000 description 1
- 229910018532 Ni—Sn Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- NCMAYWHYXSWFGB-UHFFFAOYSA-N [Si].[N+][O-] Chemical compound [Si].[N+][O-] NCMAYWHYXSWFGB-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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- H01L24/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
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Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Wire Bonding (AREA)
Description
上にC4はんだバンプが形成された構造からなる、UBM集積を使用する。次に、リフローのための加熱工程が使用されて、C4バンプ構造が形成される。その際金層は、下部の銅層の酸化防止の役割をする;銅層はC4バンプの主要濡れ面として機能する;クロム-
銅層は、次のリフロー工程の際に銅と合金(Cu3Sn)とが成長する核生成層として機能することによって、金属間の接着を促進する;クロム層は、下部の半導体チップ面への障壁と接着促進との機能をする。
全には防止しない。
図中の部品は、簡単化と明確化のために、必ずしもスケール通りには図示されていない。例えば、本発明の実施例の理解を容易にするために、幾つかの部品や図の寸法は、他の部品に比べて誇張して示されている。
のためのボンドパッド128を形成する。
の別々の成膜工程で成膜されるが、本発明ではそれは必ずしも必要ではない。最後に、はんだバンプ410の成膜後、金属マスクが除去され、はんだバンプ410はUBM上にリフローされ、それによって、図5に示すように、C4バンプ502が形成される。
アンチモン/3%銀/0.7%銅はんだ等の種々のはんだバンプ金属を組み合わせた、標
準プラットフォームを提供する。半導体工業が、共晶の錫/鉛はんだから離れて、クラッドとしては、より高温タイプの錫ベースはんだに移行し、バンプとしては、より低温の錫ベースはんだに移行するので、これは特に重要な考えである。
04全体で傾斜している。例えば初期に、段階的領域404と導電バンプ502との間で、低濃度の銅と高濃度のニッケルからなる合金の組合せを希望する場合は、段階的領域の最上面でのニッケル濃度を、銅濃度よりも高くし得る。それに対して、銅/錫合金の量を増やしたい場合は、段階的領域404中の銅の相対量を増やし得る。
Claims (4)
- 半導体素子と錫含有はんだバンプとの間に形成されるアンダーバンプ金属(414)の、銅、クロム、及びニッケルを含有する段階的領域層(404)であって、銅とニッケルとの濃度比が同段階的領域層(404)全体で傾斜しており、かつ、前記銅、クロム、及びニッケルを含有する同段階的領域層(404)の最上面でのニッケルの含有濃度が銅の含有濃度より高い半導体素子のアンダーバンプ金属(414)。
- 前記銅、クロム、及びニッケルを含有する段階的領域層(404)の厚さが約100〜300ナノメータである請求項1に記載の半導体素子のアンダーバンプ金属(414)。
- 前記銅、クロム、及びニッケルを含有する段階的領域層(404)の下部の接着層(402)と、
前記銅、クロム、及びニッケルを含有する段階的領域層(404)の上部の酸化防止層(406)と、
から更になる請求項1に記載の半導体素子のアンダーバンプ金属(414)。 - 前記接着層(402)が更に耐熱金属含有層であること、
前記酸化防止層(406)が更に金層からなることと、
からなる請求項3に記載の半導体素子のアンダーバンプ金属(414)。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/905,756 US6689680B2 (en) | 2001-07-14 | 2001-07-14 | Semiconductor device and method of formation |
US09/905,756 | 2001-07-14 | ||
PCT/US2002/018476 WO2003009379A2 (en) | 2001-07-14 | 2002-06-11 | Semiconductive device and method of formation |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005513759A JP2005513759A (ja) | 2005-05-12 |
JP4704679B2 true JP4704679B2 (ja) | 2011-06-15 |
Family
ID=25421410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003514622A Expired - Fee Related JP4704679B2 (ja) | 2001-07-14 | 2002-06-11 | 半導体素子のアンダーバンプ金属 |
Country Status (6)
Country | Link |
---|---|
US (2) | US6689680B2 (ja) |
EP (1) | EP1410439A2 (ja) |
JP (1) | JP4704679B2 (ja) |
CN (1) | CN1328789C (ja) |
TW (1) | TWI225270B (ja) |
WO (1) | WO2003009379A2 (ja) |
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- 2002-06-11 EP EP02746499A patent/EP1410439A2/en not_active Withdrawn
- 2002-06-11 JP JP2003514622A patent/JP4704679B2/ja not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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CN1328789C (zh) | 2007-07-25 |
EP1410439A2 (en) | 2004-04-21 |
US20040094837A1 (en) | 2004-05-20 |
WO2003009379A2 (en) | 2003-01-30 |
CN1561544A (zh) | 2005-01-05 |
US20030013290A1 (en) | 2003-01-16 |
TWI225270B (en) | 2004-12-11 |
JP2005513759A (ja) | 2005-05-12 |
WO2003009379A3 (en) | 2003-07-31 |
US6689680B2 (en) | 2004-02-10 |
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