JP2004193617A - 通常の低温核生成層なしでのミスマッチした基板上におけるiii族窒化物フィルムの成長 - Google Patents
通常の低温核生成層なしでのミスマッチした基板上におけるiii族窒化物フィルムの成長 Download PDFInfo
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Abstract
【解決手段】 サファイヤの基板を準備し、約1000℃と約1180℃の間の温度で、蒸着によりAl1-xGaxNの第1層を基板上で成長させ、第1層の上にあるIII族窒化物の第2層を成長させることを含む発光デバイスを形成する。第1層は、約500オングストロームと約500オングストロームとの間の厚さを有することができる。幾つかの実施形態においては、III族前駆体に対するV族前駆体の低いモル比で開始し、次に、第1層の成長においてこの比を増加させ、又は窒素を雰囲気ガスとして用いることによりV族前駆体と基板との間の反応が減らされる。
【選択図】 図1
Description
本発明の実施形態による高温核生成層を用いることは、低温核生成層に必要とされる温度サイクリング、成長停止、及び付加的な処理を排除することができ、該低温核生成層により必要とされる厳しい厚さ及び温度管理に起因する均一性についての問題を排除するため、該低温核生成層に好ましい。
12:核生成層
14:合体層
15:n型層
16:活性領域
17:p型領域
18:pコンタクト
19:nコンタクト
Claims (33)
- サファイヤの基板を準備する工程と、
約1000℃と約1180℃の間の温度で、蒸着により約500オングストロームと約5000オングストロームの間の厚さを有するAl1-xGaxN(0≦x<1)の第1層を前記基板上に成長させる工程と、
前記第1層の上にIII族窒化物の第2層を成長させる工程と、
を含む、発光デバイスを形成する方法。 - 前記第1層を約1060℃と約1160℃の間の温度で成長させる、請求項1に記載の方法。
- 前記第1層を約1080℃と約1100℃の間の温度で成長させる、請求項1に記載の方法。
- 前記第1層がAlNである請求項1に記載の方法。
- 前記第1層が約1000オングストロームと約3000オングストロームの間の厚さを有する請求項1に記載の方法。
- 前記第1層が約2000オングストロームと約2500オングストロームの間の厚さを有する請求項1に記載の方法。
- 前記xが0≦x≦0.5である請求項1に記載の方法。
- 前記第2層を前記第1層と同じ温度で成長させる請求項1に記載の方法。
- 前記第2層を前記第1層よりも低い温度で成長させる請求項1に記載の方法。
- 前記第2層がGaN、InGaN、AlGaN、及びAlInGaNのうちの1つである請求項1に記載の方法。
- 前記第2層をドープする請求項1に記載の方法。
- 前記第2層を、非ドープ状態から約5×1018cm-3までの範囲のドーパント濃度でSiによってドープする請求項1に記載の方法。
- 前記第2層を、非ドープ状態から約5×1019cm-3までの範囲のドーパント濃度を有するようp型ドーパントでドープする請求項1に記載の方法。
- 前記第2層が約500オングストロームと約2ミクロンとの間の厚さを有する請求項1に記載の方法。
- 前記第1層を成長させる工程が、
前記基板に隣接する前記第1層の第1部分を、III族前駆体に対するV族前駆体の比率が第1の比率になるように成長させる工程と、
前記第1層の第2部分を成長させながらIII族前駆体に対するV族前駆体の比率を前記第1の比率から第2の比率まで増加させる工程と、
を含む請求項1に記載の方法。 - 前記V族前駆体がNH3を含む請求項15に記載の方法。
- 前記III族前駆体が、トリメチル・アルミニウム、トリメチル・ガリウム、トリエチル・アルミニウム、及びトリエチル・ガリウムのうち少なくとも1つを含む請求項15に記載の方法。
- 前記第1の比率が約20と約100の間の範囲のモル比であり、前記第2の比率が約150より大きいモル比である請求項15に記載の方法。
- 前記第1層の第1部分を成長させる工程が、前記第1層を約100オングストロームと約500オングストロームの間に成長させることを含む請求項15に記載の方法。
- 前記III族前駆体及び前記V族前駆体を、実質的に同時に前記基板に与えることをさらに含む請求項15に記載の方法。
- 前記第1層を成長させる工程が、III族前駆体、V族前駆体、及び雰囲気を前記基板に与えることを含み、前記雰囲気が窒素である請求項1に記載の方法。
- 前記第2層を成長させる工程において、水素を与えることをさらに含む請求項21に記載の方法。
- 前記第2層の上にn型領域を成長させる工程と、
前記n型領域の上に活性領域を成長させる工程と、
前記活性領域の上にp型領域を成長させる工程と、
をさらに含む請求項1に記載の方法。 - 前記n型領域に電気的に接続する第1コンタクトを形成する工程と、
前記p型領域に電気的に接続する第2コンタクトを形成する工程と、
前記基板の側部の上に、前記第1層の反対側にレンズを設ける工程と、
をさらに含む請求項23に記載の方法。 - サファイヤの基板を準備する工程と、
約1000℃と約1180℃の間の温度で、1ミリトールより大きい圧力で、約500オングストロームと約5000オングストロームの間の厚さを有するAl1-xGaxN(0≦x<1)の第1層を前記基板上に成長させる工程と、
前記第1層の上にIII族窒化物の第2層を成長させる工程と、
を含む、発光デバイスを形成する方法。 - 前記第1層が約1060℃と約1160℃の間の温度で成長される請求項25に記載の方法。
- 前記第1層がAlNである請求項25に記載の方法。
- III族窒化物層を形成する方法であって、
基板を準備する工程と、
前記基板に隣接する前記III族窒化物層の第1部分を、III族前駆体に対するV族前駆体の比率を第1の比率として成長させる工程と、
前記III族窒化物層の第2部分を成長させている際に、III族前駆体に対するV族前駆体の比率を前記第1の比率から第2の比率に増加させる工程と、
を含む方法。 - 前記V族前駆体がNH3を含む、請求項28に記載の方法。
- 前記III族前駆体が、トリメチル・アルミニウム、トリメチル・ガリウム、トリエチル・アルミニウム、及びトリエチル・ガリウムのうち少なくとも1つを含む請求項28に記載の方法。
- 前記第1の比率が約20と約100の間の範囲のモル比であり、前記第2の比率が約150と約1500の間の範囲のモル比である請求項28に記載の方法。
- 発光デバイスを形成する方法であって、
基板を準備する工程と、
III族前駆体、V族前駆体、及び窒素である雰囲気を前記基板に与える工程と、
前記基板の上にある第1のIII族窒化物層を成長させる工程と、
を含む方法。 - 前記第1のIII族窒化物層を成長させた後に水素を与える工程と、
前記第1のIII族窒化物層の上に第2のIII族窒化物層を成長させる工程と、
をさらに含む請求項32に記載の方法。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/317309 | 2002-12-11 | ||
| US10/317,309 US6900067B2 (en) | 2002-12-11 | 2002-12-11 | Growth of III-nitride films on mismatched substrates without conventional low temperature nucleation layers |
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| Publication Number | Publication Date |
|---|---|
| JP2004193617A true JP2004193617A (ja) | 2004-07-08 |
| JP2004193617A5 JP2004193617A5 (ja) | 2007-02-01 |
| JP4757441B2 JP4757441B2 (ja) | 2011-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2003411387A Expired - Lifetime JP4757441B2 (ja) | 2002-12-11 | 2003-12-10 | 通常の低温核生成層なしでのミスマッチした基板上におけるiii族窒化物フィルムの成長 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6900067B2 (ja) |
| EP (1) | EP1429374A3 (ja) |
| JP (1) | JP4757441B2 (ja) |
| TW (1) | TWI336958B (ja) |
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| JP2013225692A (ja) * | 2005-03-14 | 2013-10-31 | Philips Lumileds Lightng Co Llc | 波長変換型半導体発光デバイス |
| JP2014154838A (ja) * | 2013-02-13 | 2014-08-25 | Toyoda Gosei Co Ltd | Iii族窒化物半導体の製造方法 |
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| JP2014154838A (ja) * | 2013-02-13 | 2014-08-25 | Toyoda Gosei Co Ltd | Iii族窒化物半導体の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI336958B (en) | 2011-02-01 |
| TW200501451A (en) | 2005-01-01 |
| EP1429374A2 (en) | 2004-06-16 |
| US6900067B2 (en) | 2005-05-31 |
| JP4757441B2 (ja) | 2011-08-24 |
| US20040115853A1 (en) | 2004-06-17 |
| EP1429374A3 (en) | 2009-11-04 |
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