JP5004800B2 - 炭化ケイ素デバイス用のはんだ付け可能上部金属 - Google Patents
炭化ケイ素デバイス用のはんだ付け可能上部金属 Download PDFInfo
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- JP5004800B2 JP5004800B2 JP2007538120A JP2007538120A JP5004800B2 JP 5004800 B2 JP5004800 B2 JP 5004800B2 JP 2007538120 A JP2007538120 A JP 2007538120A JP 2007538120 A JP2007538120 A JP 2007538120A JP 5004800 B2 JP5004800 B2 JP 5004800B2
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- passivation layer
- semiconductor device
- contact
- solderable
- solderable contact
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- 229910052751 metal Inorganic materials 0.000 title claims description 55
- 239000002184 metal Substances 0.000 title claims description 55
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims description 31
- 229910010271 silicon carbide Inorganic materials 0.000 title claims description 30
- 238000002161 passivation Methods 0.000 claims description 101
- 239000004065 semiconductor Substances 0.000 claims description 45
- 229910000679 solder Inorganic materials 0.000 claims description 44
- 229910052709 silver Inorganic materials 0.000 claims description 30
- 239000004332 silver Substances 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 30
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 26
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 15
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 13
- 239000004642 Polyimide Substances 0.000 claims description 10
- 229920001721 polyimide Polymers 0.000 claims description 10
- 150000002739 metals Chemical class 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 5
- 238000005476 soldering Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 8
- 210000001787 dendrite Anatomy 0.000 description 7
- 239000010936 titanium Substances 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 239000005360 phosphosilicate glass Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- -1 silver ions Chemical class 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
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Description
102 SiC基板
104 ショットキーバリア金属
106 コンタクト金属
108 フィールド酸化膜リング
110 はんだ付け可能コンタクト
110a はんだ付け可能コンタクトの端部/側部
112 ガードリング
112a〜112d 多重ガードリング
114 フィールドプレート
116 パッシベーション層
116a パッシベーション層の端部/側部
116b パッシベーション層の端部
118 パッシベーション層
118a パッシベーション層の端部/側部
120 コンタクト金属
125 隙間
130 クリップ/ストラップ
132 はんだペースト
134 はんだ合金
136 はんだ付け可能上部金属
140 N+拡散
150 能動部分
152 ターミネーション領域
154 切断ストリート
400a〜400e SiCショットキーダイオード
Claims (20)
- 半導体デバイスであって、
上面を有する炭化ケイ素基板と、
コンタクト金属を有し、前記基板の上面を覆う少なくとも1つの電源電極と、
前記基板の上面の上で、前記電源電極の外周辺端部を囲むパッシベーション層と、
前記電源電極の上面の一部の上に配置され、銀を含有するはんだ付け可能コンタクトと
前記はんだ付け可能コンタクト上面の上、前記はんだ付け可能コンタクトの前記側面の上および前記電源電極の前記上面のはんだ付け可能コンタクトに隣接する部分の上に配置されるはんだ合金と
を備え、
前記はんだ付け可能コンタクトの側面は、前記パッシベーション層の側面から離間して配置され、前記はんだ付け可能コンタクトと前記パッシベーション層との間に隙間を形成し、
前記はんだ合金と前記コンタクト金属とは、前記はんだ付け可能コンタクトの前記銀を捕捉する拡散バリアを成すことを特徴とする半導体デバイス。 - 前記はんだ付け可能コンタクトの1つの上面および1つの側面の全体は、はんだ接続のために露出されている、請求項1に記載の半導体デバイス。
- はんだ付け後に、前記はんだ付け可能コンタクトの前記上面および前記側面の全体が、完全にはんだ合金に変わっている、請求項2に記載の半導体デバイス。
- 前記はんだ付け可能コンタクトと前記パッシベーション層との間の前記隙間の幅は、5μm〜80μmである、請求項1に記載の半導体デバイス。
- 前記はんだ付け可能コンタクトは、はんだ付け可能な3種類の金属からなり、かつ前記3種類から成る金属の上部は、銀から成っている、請求項1に記載の半導体デバイス。
- 前記パッシベーション層は、アモルファスシリコン層である、請求項1に記載の半導体デバイス。
- 前記パッシベーション層は第1パッシベーション層であり、前記第1パッシベーション層を覆うように配置された第2パッシベーション層をさらに備えている、請求項1に記載の半導体デバイス。
- 前記第2パッシベーション層が前記隙間にまで伸延して、前記第2パッシベーション層の側部がはんだ付け可能コンタクトの側部に近隣し、もって、前記隙間が、前記はんだ付け可能コンタクトと前記パッシベーション層との間に形成される請求項7に記載の半導体デバイス。
- はんだ付け可能コンタクトの側部は、基板の上面の上の第1高さまで伸び、第2パッシベーション層の側部は、前記基板の前記上面の上の第2高さまで伸び前記第2高さは、前記第1高さと等しいか、またはそれよりも大きい、請求項8に記載の半導体デバイス。
- 前記第2パッシベーション層は、感光性ポリイミド層、PSG酸化層、あるいは窒化シリコン層のいずれかである、請求項7に記載の半導体デバイス。
- 前記半導体デバイスはショットキーダイオードであり、少なくとも1つの電源電極は、アノード電極である、請求項1に記載の半導体デバイス。
- 少なくとも1つのガードリングを含むターミネーション領域をさらに備えている、請求項11に記載の半導体デバイス。
- 300V〜1600Vのブロッキング電圧に対応できるようになっている、請求項12に記載の半導体デバイス。
- 前記はんだ付け可能コンタクトに電気的に接続された導電性クリップ、またはリードフレームをさらに備えている、請求項1に記載の半導体デバイス。
- 半導体デバイスであって、
上面を有する炭化ケイ素基板と、
前記基板の上面の上のショットキーバリア金属と、
前記ショットキーバリア金属の上面の上のコンタクト金属と、
前記基板の上面の上で、前記ショットキーバリア金属の外周辺端部に隣接して、前記コンタクト金属の外周辺端部の一部の下に、配置される、第1パッシベーション層と、
前記第1パッシベーション層の上面の上および前記コンタクト金属の前記外周辺端部の一部の上に配置される第2パッシベーション層と、
前記コンタクト金属の上面の一部の上に配置され、銀を含有するはんだ付け可能コンタクトと、
前記はんだ付け可能コンタクト上面の上、前記はんだ付け可能コンタクトの前記側面の上および前記電源電極の前記上面のはんだ付け可能コンタクトに隣接する部分の上に配置されるはんだ合金と
を備え、
前記第1のパッシベーション層と、前記第2のパッシベーション層とは、前記コンタクト金属の前記外周辺端部を囲み、
前記はんだ付け可能コンタクトの前記側面は、前記第2のパッシベーション層の側面から離間され、前記はんだ付け可能コンタクトと前記第2のパッシベーション層との間に隙間を形成するようになっており、
前記コンタクト金属は、前記はんだ付け可能コンタクトの金属との相互作用から前記ショットキーバリア金属を保護する拡散バリアとして機能し、前記はんだ合金は、前記はんだ付け可能コンタクトから発した銀を捕捉することを特徴とする半導体デバイス。 - 前記はんだ付け可能コンタクトと前記第2のパッシベーション層との間の前記隙間の幅は、5μm〜80μmである、請求項15に記載の半導体デバイス。
- 前記第1パッシベーション層はアモルファスシリコン層であり、前記第2パッシベーション層は、感光性ポリイミド層、PSG酸化層、窒化シリコン層のいずれか1つである、請求項15に記載の半導体デバイス。
- はんだ付け可能コンタクト、および第2パッシベーション層の近接する側部は、前記はんだ付け可能コンタクトと前記第2のパッシベーション層との間の前記隙間の一部を形成し、前記近接する側部は、基板の上面と同じ高さまで伸びている、請求項15に記載の半導体デバイス。
- 前記はんだ付け可能コンタクトの上面および側面の全体は、はんだ接続のために露出され、はんだ付け後に、前記はんだ付け可能コンタクトの上面および側面の全体は、はんだ合金に完全に変わっている、請求項15に記載の半導体デバイス。
- リードフレーム、クリップ又はストラップの少なくとも1つと、
銀を含有する前記はんだ付け可能コンタクトの上に配置され、リフローされることで、リードフレーム、クリップ又はストラップの前記少なくとも1つを前記はんだ付け可能コンタクトに取り付ける、はんだの層と
を更に備え、
半導体デバイスは、少なくとも1つのガードリングを含むターミネーション領域を更に備え、
前記はんだの層のリフローにより、はんだ付け可能コンタクトの表面に沿って銀を溶かしてはんだ合金を形成し、
前記はんだ付け可能コンタクトと前記第2のパッシベーション層との間の隙間により、前記はんだの層が、リフローされる時に、前記ターミネーション領域内に拡がることが防止される請求項1又は16に記載の半導体デバイス。
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Application Number | Priority Date | Filing Date | Title |
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US62075604P | 2004-10-21 | 2004-10-21 | |
US60/620,756 | 2004-10-21 | ||
US11/255,021 | 2005-10-20 | ||
US11/255,021 US7394158B2 (en) | 2004-10-21 | 2005-10-20 | Solderable top metal for SiC device |
PCT/US2005/038118 WO2006047382A2 (en) | 2004-10-21 | 2005-10-21 | Solderable top metal for sic device |
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JP2008518445A JP2008518445A (ja) | 2008-05-29 |
JP5004800B2 true JP5004800B2 (ja) | 2012-08-22 |
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JP2007538120A Active JP5004800B2 (ja) | 2004-10-21 | 2005-10-21 | 炭化ケイ素デバイス用のはんだ付け可能上部金属 |
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US (2) | US7394158B2 (ja) |
EP (1) | EP1810338A4 (ja) |
JP (1) | JP5004800B2 (ja) |
KR (1) | KR100879814B1 (ja) |
CN (1) | CN101740382B (ja) |
TW (1) | TWI278090B (ja) |
WO (1) | WO2006047382A2 (ja) |
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US9496421B2 (en) | 2016-11-15 |
WO2006047382A2 (en) | 2006-05-04 |
KR20070083857A (ko) | 2007-08-24 |
EP1810338A4 (en) | 2011-02-23 |
US20080286968A1 (en) | 2008-11-20 |
CN101740382B (zh) | 2013-09-04 |
WO2006047382A9 (en) | 2009-12-17 |
WO2006047382A3 (en) | 2007-05-31 |
CN101740382A (zh) | 2010-06-16 |
JP2008518445A (ja) | 2008-05-29 |
KR100879814B1 (ko) | 2009-01-22 |
US20060086939A1 (en) | 2006-04-27 |
EP1810338A2 (en) | 2007-07-25 |
TWI278090B (en) | 2007-04-01 |
TW200620612A (en) | 2006-06-16 |
US7394158B2 (en) | 2008-07-01 |
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