JP6425835B2 - ダイヤモンド−半導体複合基板を製造する方法 - Google Patents
ダイヤモンド−半導体複合基板を製造する方法 Download PDFInfo
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Description
(i)化合物半導体が上に配置されたネイティブ炭化ケイ素基板を有するネイティブ半導体ウエハから出発するステップと、
(ii)上記化合物半導体に炭化ケイ素キャリア基板を接合するステップと、
(iii)上記ネイティブ炭化ケイ素基板を除去するステップと、
(iv)上記化合物半導体の上に核生成層を形成するステップと、
(v)上記核生成層上に多結晶化学気相成長(CVD)ダイヤモンドを成長させて、複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを形成するステップと、
(vi)上記炭化ケイ素キャリア基板を除去して、上記核生成層を介して上記多結晶CVDダイヤモンドに接合された上記化合物半導体を有する層状構造を達成するステップと
を有し、
ステップ(ii)において、上記炭化ケイ素キャリア基板は、上記炭化ケイ素キャリア基板の厚さよりも短いコヒーレンス長のレーザ光を吸収するレーザ吸収材料を介して、上記化合物半導体に接合され、
ステップ(vi)において、上記炭化ケイ素キャリア基板は、
複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを少なくとも100℃の温度まで加熱し、
上記炭化ケイ素キャリア基板の厚さよりも短いコヒーレンス長を持つレーザ光を、上記炭化ケイ素キャリア基板を通じて導き、該レーザ光が上記レーザ吸収材料によって吸収され、そして
上記レーザ光への曝露後に上記複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを冷却して、上記化合物半導体からの上記炭化ケイ素キャリア基板の分離を生じさせる、
ことによって、上記化合物半導体から除去される。
複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを少なくとも100℃の温度(例えば、少なくとも150℃、200℃、300℃、400℃、又は450℃)まで加熱し、
炭化ケイ素キャリア基板の厚さよりも短いコヒーレンス長を持つレーザ光を、炭化ケイ素キャリア基板16を通じて導き、該レーザ光がレーザ吸収材料14によって吸収され、そして
レーザ光への曝露後に複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを冷却して、化合物半導体12からの炭化ケイ素キャリア基板16の分離を生じさせる、
ことを有する。
Lc=λ2/Δλ
によって与えられる。ここで、λは光の波長であり、Δλはスペクトル帯域幅である。ほぼ変形制限されたパルスでは、コヒーレンス長とパルス幅は直接的にLc≒cτによって関係付けられる。例えば、100fsレーザパルスは、およそ30μmのコヒーレンス長を有する。
Claims (15)
- 半導体・オン・ダイヤモンド複合基板を製造する方法であって、当該方法は、
(i)化合物半導体が上に配置されたネイティブ炭化ケイ素基板を有するネイティブ半導体ウエハから出発するステップと、
(ii)前記化合物半導体に炭化ケイ素キャリア基板を接合するステップと、
(iii)前記ネイティブ炭化ケイ素基板を除去するステップと、
(iv)前記化合物半導体の上に核生成層を形成するステップと、
(v)前記核生成層上に多結晶化学気相成長(CVD)ダイヤモンドを成長させて、複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを形成するステップと、
(vi)前記炭化ケイ素キャリア基板を除去して、前記核生成層を介して前記多結晶CVDダイヤモンドに接合された前記化合物半導体を有する層状構造を達成するステップと
を有し、
ステップ(ii)において、前記炭化ケイ素キャリア基板は、前記炭化ケイ素キャリア基板の厚さよりも短いコヒーレンス長のレーザ光を吸収するレーザ吸収材料を介して、前記化合物半導体に接合され、
ステップ(vi)において、前記炭化ケイ素キャリア基板は、
複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを少なくとも100℃の温度まで加熱し、
前記炭化ケイ素キャリア基板の厚さよりも短いコヒーレンス長を持つレーザ光を、前記炭化ケイ素キャリア基板を通じて導き、該レーザ光が前記レーザ吸収材料によって吸収され、そして
前記レーザ光への曝露後に前記複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハを冷却して、前記化合物半導体からの前記炭化ケイ素キャリア基板の分離を生じさせる、
ことによって、前記化合物半導体から除去される、
方法。 - 前記炭化ケイ素キャリア基板と前記化合物半導体との間に設けられる前記レーザ吸収材料はセラミック材料である、請求項1に記載の方法。
- 前記炭化ケイ素キャリア基板と前記化合物半導体との間に設けられる前記レーザ吸収材料は多結晶シリコン又は非晶質シリコンである、請求項1に記載の方法。
- 前記レーザ吸収材料は、前記炭化ケイ素キャリア基板を前記化合物半導体に接合するのに先立って、前記炭化ケイ素キャリア基板上にコーティングされる、請求項1乃至3の何れかに記載の方法。
- 前記炭化ケイ素キャリア基板は、100マイクロメートルから2000マイクロメートルの範囲内の厚さを有する、請求項1乃至4の何れかに記載の方法。
- 前記炭化ケイ素キャリア基板は、少なくとも50mmの直径を有する、請求項1乃至5の何れかに記載の方法。
- 前記ネイティブ炭化ケイ素基板は、
前記ネイティブ炭化ケイ素基板の大部分を機械的にラッピング又はポリッシングすることと、
前記ネイティブ炭化ケイ素基板の残部をドライエッチングすることと、
を有する二段階プロセスを用いて除去される、請求項1乃至6の何れかに記載の方法。 - 前記核生成層は、ナノ結晶ダイヤモンド、炭化ケイ素、シリコン、窒化ケイ素、二酸化ケイ素、窒化アルミニウム、酸化マグネシウム、窒化ホウ素、又は酸化ベリリウムのうちの1つ以上を有する、請求項1乃至7の何れかに記載の方法。
- 前記多結晶CVDダイヤモンドは、少なくとも50マイクロメートルの厚さまで成長される、請求項1乃至8の何れかに記載の方法。
- ステップ(vi)において、前記複合ダイヤモンド−化合物半導体−炭化ケイ素ウエハは、100℃から550℃の範囲内の温度まで加熱される、請求項1乃至9の何れかに記載の方法。
- 前記レーザ光の前記コヒーレンス長は、10マイクロメートルから400マイクロメートルの範囲内である、請求項1乃至10の何れかに記載の方法。
- 前記レーザ光は、400nmから1200nmの範囲内の波長を有する、請求項1乃至11の何れかに記載の方法。
- 前記レーザ光は、1フェムト秒から1000フェムト秒の範囲内のパルス幅を有する、請求項1乃至12の何れかに記載の方法。
- 前記レーザ吸収材料によって吸収されるように前記レーザ光を前記炭化ケイ素キャリア基板を通じて導くステップは、冷却に先立って前記レーザ吸収材料の層全体がレーザ光に曝されるまで前記炭化ケイ素キャリア基板の上でレーザビームを移動させることを有する、請求項1乃至13の何れかに記載の方法。
- 前記化合物半導体は、窒化ガリウム、窒化アルミニウム、窒化アルミニウムガリウム、及び窒化インジウムアルミニウムガリウムのうちの1つ以上を有する、請求項1乃至14の何れかに記載の方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562161636P | 2015-05-14 | 2015-05-14 | |
| US62/161,636 | 2015-05-14 | ||
| GBGB1509766.0A GB201509766D0 (en) | 2015-06-05 | 2015-06-05 | Method of fabricating diamond-semiconductor composite substrates |
| GB1509766.0 | 2015-06-05 | ||
| PCT/EP2016/060493 WO2016180849A1 (en) | 2015-05-14 | 2016-05-11 | Method of fabricating diamond-semiconductor composite substrates |
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| JP2018514498A JP2018514498A (ja) | 2018-06-07 |
| JP6425835B2 true JP6425835B2 (ja) | 2018-11-21 |
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| JP (1) | JP6425835B2 (ja) |
| KR (1) | KR102020432B1 (ja) |
| CN (1) | CN107636800B (ja) |
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| JP6638823B2 (ja) * | 2016-10-24 | 2020-01-29 | 三菱電機株式会社 | 半導体装置 |
| US10128107B1 (en) * | 2017-08-31 | 2018-11-13 | Rfhic Corporation | Wafers having III-Nitride and diamond layers |
| EP3556454B1 (en) | 2018-04-16 | 2024-05-29 | IMEC vzw | Formation of diamond membranes |
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| JP4524953B2 (ja) * | 2001-05-18 | 2010-08-18 | パナソニック株式会社 | 窒化物半導体基板の製造方法および窒化物半導体装置の製造方法 |
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| TWI275566B (en) * | 2005-04-27 | 2007-03-11 | Kinik Co | A diamond substrate and the process method of the same |
| JP4809632B2 (ja) * | 2005-06-01 | 2011-11-09 | ルネサスエレクトロニクス株式会社 | 半導体装置の製造方法 |
| KR101438818B1 (ko) * | 2008-04-01 | 2014-09-05 | 엘지이노텍 주식회사 | 발광다이오드 소자 |
| DE102009057566A1 (de) * | 2009-12-09 | 2011-06-16 | Osram Opto Semiconductors Gmbh | Vorrichtung für ein Laserabhebeverfahren und Laserabhebeverfahren |
| GB2484506A (en) * | 2010-10-13 | 2012-04-18 | Univ Warwick | Heterogrowth |
| JP2013118272A (ja) * | 2011-12-02 | 2013-06-13 | Sumitomo Electric Ind Ltd | Iii族窒化物半導体デバイスの製造方法 |
| CN104285001A (zh) * | 2012-02-29 | 2015-01-14 | 六号元素技术美国公司 | 金刚石载氮化镓晶片以及制造设备和制造方法 |
| CN102664221B (zh) * | 2012-05-18 | 2015-05-27 | 杭州士兰明芯科技有限公司 | Led衬底的剥离方法 |
| CN102699537B (zh) * | 2012-05-18 | 2015-11-04 | 杭州士兰明芯科技有限公司 | 激光剥离led衬底的系统及方法 |
| CN202655797U (zh) * | 2012-05-18 | 2013-01-09 | 杭州士兰明芯科技有限公司 | 激光剥离led衬底的系统 |
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| GB201608216D0 (en) | 2016-06-22 |
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| KR20170137180A (ko) | 2017-12-12 |
| CN107636800A (zh) | 2018-01-26 |
| US10043700B2 (en) | 2018-08-07 |
| CN107636800B (zh) | 2020-11-20 |
| GB2539780B (en) | 2017-06-07 |
| US20180151404A1 (en) | 2018-05-31 |
| GB201509766D0 (en) | 2015-07-22 |
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