JP2012114480A - 金属−炭化珪素オーミックコンタクトの局所的アニーリングおよびそのようにして形成された素子 - Google Patents
金属−炭化珪素オーミックコンタクトの局所的アニーリングおよびそのようにして形成された素子 Download PDFInfo
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 239
- 238000000137 annealing Methods 0.000 title abstract description 26
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 229910052751 metal Inorganic materials 0.000 claims abstract description 123
- 239000002184 metal Substances 0.000 claims abstract description 123
- 239000000758 substrate Substances 0.000 claims abstract description 121
- 239000000463 material Substances 0.000 claims abstract description 50
- 239000004065 semiconductor Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 30
- 229920002120 photoresistant polymer Polymers 0.000 claims description 25
- 238000005224 laser annealing Methods 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 229910002601 GaN Inorganic materials 0.000 abstract description 4
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 7
- 230000014509 gene expression Effects 0.000 description 6
- 229910021332 silicide Inorganic materials 0.000 description 6
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
- 238000005468 ion implantation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 230000008034 disappearance Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004380 Cholic acid Substances 0.000 description 1
- 229910002650 Ni-SiC Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 238000004151 rapid thermal annealing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
- H01L21/18—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 the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
- H01L33/40—Materials therefor
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- 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
- H01L21/0445—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 the devices having semiconductor bodies comprising crystalline silicon carbide
- H01L21/048—Making electrodes
- H01L21/0485—Ohmic electrodes
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- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/005—Processes
- H01L33/0095—Post-treatment of devices, e.g. annealing, recrystallisation or short-circuit elimination
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- 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
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0272—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers for lift-off processes
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- 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
- H01L21/18—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 the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/2636—Bombardment with radiation with high-energy radiation for heating, e.g. electron beam heating
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- 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
- H01L21/18—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 the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/268—Bombardment with radiation with high-energy radiation using electromagnetic radiation, e.g. laser radiation
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- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/34—Materials of the light emitting region containing only elements of Group IV of the Periodic Table
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Abstract
【解決手段】炭化珪素(SiC)基板上に金属を形成し、この金属とSiC基板との界面部をアニーリングして、そこに金属−SiC材を形成し、SiC基板上のある箇所ではアニーリングされないようにして、そこには金属−SiC材が形成されないようにすることによって半導体素子のコンタクトを形成することができる。
【選択図】図21
Description
本出願は、「Laser Annealing of Ohmic Contacts to SiC」と題され、2003年8月14日出願の米国特許仮出願番号60/495,189、および「Laser Annealing of Ohmic Contacts to SiC」と題され、2003年8月15日出願の米国特許仮出願番号60/495,284の利益を主張する。また、上記の出願は、共に本出願と共通の譲受人を持ち、その全体をここに参照して組み込むものとする。
本発明による一部の態様においては、半導体素子用のオーミックコンタクトの形成方法は、炭化珪素(SiC)層上に金属を形成し、この金属とSiC層とをレーザアニーリングして金属とSiC層との界面部に金属−SiC材を形成することを含むことができる。この金属−SiC材の一部を除去して、SiC層をパターンに従って露出し、半導体素子上に少なくとも1つのオーミックコンタクトを設けることができる。
Claims (14)
- 減少させた厚さの炭化ケイ素(SiC)基板を供給するため、SiC基板を薄くするステップと、
前記減少させた厚さのSiC基板上に金属を供給するステップと、
前記金属と前記減少させた厚さのSiC基板の箇所を、そこにオーミックコンタクトを供給する金属−炭化ケイ素(SiC)材を形成するエネルギーレベルでレーザアニーリングするステップと
を有する半導体素子のオーミックコンタクトを形成する方法。 - 請求項1に記載の方法において、前記箇所が前記金属と前記減少させた厚さのSiC基板との第1の界面部を含み、
前記レーザアニーリングするステップは、前記金属と前記減少させた厚さのSiC基板との第2の箇所をアニーリングしないようにパターンに従ってアニーリングして、前記第2の箇所で前記金属−SiC材が形成されないようにするステップを含むことを特徴とする方法。 - 前記減少させた厚さのSiC基板上に前記オーミックコンタクトが残るように、前記金属を前記第2の箇所から除去するステップをさらに含むことを特徴とする請求項2に記載の方法。
- 請求項1に記載の方法において、前記箇所が前記金属と前記減少させた厚さのSiC基板との第1の界面部を含み、
前記レーザアニーリングするステップは、
マスクの開口部を通して、前記金属の前記第1の界面部にレーザ光を入射させ、前記金属と前記減少させた厚さのSiC基板との第2の界面部に対向した前記マスクで前記レーザ光を遮蔽して、前記第2の界面部ではアニーリングされないようにするするステップを
を含むことを特徴とする方法。 - 前記減少させた厚さのSiC基板上に前記オーミックコンタクトが残るように、前記金属を前記第2の界面部から除去するステップをさらに含むことを特徴とする請求項4に記載の方法。
- 請求項1に記載の方法であって、
前記減少させた厚さのSiC基板上に金属を供給するステップが、金属がないパターンの部分を含む金属パターンを、前記減少させた厚さのSiC基板上の前記金属から形成することを含み、
前記レーザアニーリングするステップは、前記金属−SiC材を形成するために、前記金属パターンと前記減少させた厚さのSiC基板を前記レーザアニーリングするステップを含むことを特徴とする方法。 - 請求項1に記載の方法であって、
パターンに従って前記減少させた厚さのSiC基板上にフォトレジストを形成して、前記減少させた厚さのSiC基板の第1の部分を露出し、かつ前記減少させた厚さのSiC基板の第2の部分を被覆するステップをさらに含み、
前記減少させた厚さのSiC基板上に金属を供給するステップは、前記第1の部分と前記フォトレジストの上にブランケット金属を形成するステップを含み、
前記レーザアニーリングするステップは、前記第1の部分に対応する前記ブランケット金属と前記減少させた厚さのSiC基板の部分にレーザ光を入射させて、そこに金属−SiC材を形成するステップと、前記第2の部分に対応する前記ブランケット金属にはレーザ光を入射させず、そこでは前記金属−SiC材は形成されないようにするステップとを含むことを特徴とする方法。 - 前記フォトレジストから前記ブランケット金属を除去して、前記金属−SiC材を残すステップと、
前記金属−SiC材上にオーバーレイを形成するステップと、
前記第2の部分から前記フォトレジストを除去するステップと
をさらに有することを特徴とする請求項7に記載の方法。 - 前記金属−SiC材上および前記フォトレジスト上にオーバーレイを形成するステップと、
前記第2の部分から前記フォトレジストを除去するステップと
をさらに有することを特徴とする請求項7に記載の方法。 - 前記フォトレジストと、その上の前記ブランケット金属とをリフトオフして、前記金属−SiC材を残すステップと、
前記金属−SiC材上にオーバーレイを形成するステップと
をさらに有することを特徴とする請求項7に記載の方法。 - 前記減少させた厚さのSiC基板をダイシングして、その上に前記オーミックコンタクトを有する分離された半導体素子を供給することを特徴とする請求項1に記載の方法。
- 前記レーザアニーリングするステップは
約10e−03ohm・cm2未満の固有コンタクト抵抗を有するオーミックコンタクトを形成するため、前記減少させた厚さのSiC基板のバンドギャップを超えるエネルギーレベルでレーザアニーリングするステップを含むことを特徴とする請求項1に記載の方法。 - 前記レーザアニーリングするステップは約10e−04ohm・cm2未満の固有コンタクト抵抗を有するオーミックコンタクトを形成するため、前記減少させた厚さのSiC基板のバンドギャップを超えるエネルギーレベルでレーザアニーリングするステップを含むことを特徴とする請求項1に記載の方法。
- 前記半導体素子は傾斜した部分および垂直部分を有する側壁を含むことを特徴とする請求項1に記載の方法。
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US49518903P | 2003-08-14 | 2003-08-14 | |
US60/495,189 | 2003-08-14 | ||
US49528403P | 2003-08-15 | 2003-08-15 | |
US60/495,284 | 2003-08-15 | ||
US10/916,113 | 2004-08-11 | ||
US10/916,113 US20050104072A1 (en) | 2003-08-14 | 2004-08-11 | Localized annealing of metal-silicon carbide ohmic contacts and devices so formed |
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JP2006523380A Division JP2007534143A (ja) | 2003-08-14 | 2004-08-12 | 金属−炭化珪素オーミックコンタクトの局所的アニーリングおよびそのようにして形成された素子 |
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JP2012114480A true JP2012114480A (ja) | 2012-06-14 |
JP5956209B2 JP5956209B2 (ja) | 2016-07-27 |
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JP2012065612A Expired - Lifetime JP5956209B2 (ja) | 2003-08-14 | 2012-03-22 | 金属−炭化珪素オーミックコンタクトの局所的アニーリングおよびそのようにして形成された素子 |
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US (2) | US20050104072A1 (ja) |
EP (2) | EP3522204B1 (ja) |
JP (2) | JP2007534143A (ja) |
KR (1) | KR20060057609A (ja) |
CA (1) | CA2535723A1 (ja) |
MY (1) | MY169522A (ja) |
TW (1) | TWI402997B (ja) |
WO (1) | WO2005020308A1 (ja) |
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- 2004-08-12 JP JP2006523380A patent/JP2007534143A/ja active Pending
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Also Published As
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US20120164765A1 (en) | 2012-06-28 |
EP3522204A2 (en) | 2019-08-07 |
TW200509423A (en) | 2005-03-01 |
MY169522A (en) | 2019-04-22 |
WO2005020308A1 (en) | 2005-03-03 |
KR20060057609A (ko) | 2006-05-26 |
CA2535723A1 (en) | 2005-03-03 |
US20050104072A1 (en) | 2005-05-19 |
EP3522204A3 (en) | 2019-08-21 |
US9608166B2 (en) | 2017-03-28 |
JP5956209B2 (ja) | 2016-07-27 |
JP2007534143A (ja) | 2007-11-22 |
EP1661170B1 (en) | 2019-04-03 |
EP1661170A1 (en) | 2006-05-31 |
EP3522204B1 (en) | 2020-07-29 |
TWI402997B (zh) | 2013-07-21 |
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