JP5607781B2 - 大面積で均一な低転位密度GaN基板およびその製造プロセス - Google Patents
大面積で均一な低転位密度GaN基板およびその製造プロセス Download PDFInfo
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- C30B29/40—AIIIBV compounds wherein A is B, Al, Ga, In or Tl and B is N, P, As, Sb or Bi
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- Y10T428/00—Stock material or miscellaneous articles
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Description
本発明は、発光ダイオード、レーザダイオード、光電子センサ、光電子スイッチ、高電子移動度トランジスタなどのマイクロエレクトロニクスおよび光電子デバイスの製造に有用であるような、大面積で均一に低い転位密度の窒化ガリウム材料と、同様に、このような窒化ガリウム材料を製造する方法とに関する。
窒化ガリウム(GaN)および関連するIII−V族窒化物合金は、発光ダイオード(LED)およびレーザダイオード(LD)ならびにエレクトロニクスデバイスに用途がある。GaNベースのデバイスの性能は、デバイス層の結晶欠陥、特に貫通転位密度に強く依存する。青色およびUVレーザダイオードに関しては、3×106cm-2未満の転位密度が、より長い寿命のためには好ましい。さらに、ネイティブ窒化ガリウム基板上で成長されたGaNデバイスは、デバイス性能の改善ならびに設計および製作の単純化ために好ましい。
本発明は、大面積で均一な低転位密度窒化ガリウムおよびその製造プロセスに関する。
本発明は、均一な低転位密度で大面積の窒化ガリウム基板およびその製造方法に関する。
らピット化成長条件へ、成長条件を変化させる。
一般的な成長方向は、おおよそc軸成長だが、傾斜させるべきである。
単一ウエハプロセス
本実施例において、サファイア基板上の2ステップGaN HVPE成長を実行した。成長の第1ステージでは、成長温度は1010℃、NH3/HCl比率は17、成長速度は約160μm/時、成長したフィルムの厚さは約320μmだった。
GaNインゴットプロセス
本実施例では、2ステップHVPE GaN成長プロセスを実行して、比較的長いGaNインゴットを成長させた。
ザダイオード、光電子センサ、光電子スイッチ、高電子移動度トランジスタなどのマイクロエレクトロニクスおよび光電子デバイスの製造のために有用に用いられる。例として、III−V族窒化物材料は、ウエハまたは他の基板物品の形状で用いられるような単結晶GaNにすることができる。
Claims (5)
- ピット形成およびピット充填成長ステップの多数のサイクルによって形成され、自身のフェースに2cm2を超える大面積を有し、3×10 6 cm −2 を超えない転位密度を有し、かつ50%未満の転位密度標準偏差比率(DDSDR)を有する単結晶GaN材料であって、
前記単結晶GaN材料は、ピット形成およびピット充填成長ステップの最初のサイクルによって形成された第1の成長表面を有していて、より高い不純物濃度を有する複数の区別できる領域が、第1の成長表面の表面積の少なくとも50%を占めており、
前記単結晶GaN材料は、最初のサイクルの後に行われる、ピット形成およびピット充填成長ステップのサイクルによって形成された第2の成長表面を有していて、前記第2の成長表面をCMP仕上げした際に第2の成長表面の面積の10%未満の凹エリアを含む、単結晶GaN材料。 - 少なくとも2インチの直径を有する、請求項1に記載の材料。
- 請求項1又は2に記載の材料を成長後処理ステップにさらして得られるウエハであって、該ウエハ表面の凹エリアが全体的なウエハ表面積の10%未満であるウエハ。
- 請求項1又は2に記載の材料を含む物品。
- GaN材料の製造方法であって、
前記GaN材料の製造方法は、自身のフェースに2cm2を超える大面積を有する単結晶GaN材料を基板上に形成するための成長リアクタを利用する気相成長プロセスを含み、
前記プロセスは、各サイクルはそれぞれ第1段階の成長と第2段階の成長を含み、最初のサイクルとその後に行う少なくとも1つのサイクルを含み
第1段階の成長は、ピット化成長条件下で気相成長技術によって、GaN材料を前記基板に成長させる1つまたは複数のステップを含み、
第2段階の成長は、前記GaN材料の成長表面においてピットのクロージャおよび欠陥の消滅を達成するピット充填条件下で、前記気相成長技術によって前記GaN材料を成長させる1つまたは複数のステップを含み、
前記第1段階の成長および前記第2段階の成長のいずれもが、前記成長リアクタへのアンモニアおよび塩化水素のいずれものフローを含み、前記第2段階の成長が、前記第1段階の成長よりも、塩化水素に対して低いアンモニアフロー比を含み、
前記GaN材料の製造方法は、その後に行うサイクルにより形成されたGaN材料の第2の成長表面を、凹エリアが第2の成長表面の面積の10%未満となるようにCMP仕上げプロセスにより仕上げることを含み、
最初のサイクルによって形成される第1の成長表面は、下記(a)および(b)のいずれかの特徴を有する、より高い不純物濃度を有する複数の区別できる領域を含む、GaN材料の製造方法。
(a)前記第1の成長表面には、より高い不純物濃度を有する複数の区別できる領域が、第1の成長表面の表面積の少なくとも100領域/cm2で含まれている。
(b)より高い不純物濃度を有する複数の区別できる領域が、前記第1の成長表面の表面積の少なくとも50%を占めている。
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US10/712,351 US7323256B2 (en) | 2003-11-13 | 2003-11-13 | Large area, uniformly low dislocation density GaN substrate and process for making the same |
US10/712,351 | 2003-11-13 |
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JP2010118675A Division JP5394322B2 (ja) | 2003-11-13 | 2010-05-24 | 単結晶iii−v族窒化物材料とその製造方法、物品およびウエハ |
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JP2013155108A JP2013155108A (ja) | 2013-08-15 |
JP2013155108A5 JP2013155108A5 (ja) | 2013-10-31 |
JP5607781B2 true JP5607781B2 (ja) | 2014-10-15 |
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JP2006540022A Expired - Lifetime JP4741506B2 (ja) | 2003-11-13 | 2004-11-12 | 大面積で均一な低転位密度GaN基板およびその製造プロセス |
JP2010118675A Expired - Lifetime JP5394322B2 (ja) | 2003-11-13 | 2010-05-24 | 単結晶iii−v族窒化物材料とその製造方法、物品およびウエハ |
JP2013085654A Expired - Lifetime JP5607781B2 (ja) | 2003-11-13 | 2013-04-16 | 大面積で均一な低転位密度GaN基板およびその製造プロセス |
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JP2006540022A Expired - Lifetime JP4741506B2 (ja) | 2003-11-13 | 2004-11-12 | 大面積で均一な低転位密度GaN基板およびその製造プロセス |
JP2010118675A Expired - Lifetime JP5394322B2 (ja) | 2003-11-13 | 2010-05-24 | 単結晶iii−v族窒化物材料とその製造方法、物品およびウエハ |
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US (4) | US7323256B2 (ja) |
EP (2) | EP2267190B1 (ja) |
JP (3) | JP4741506B2 (ja) |
KR (1) | KR101119728B1 (ja) |
CN (1) | CN100577894C (ja) |
AT (1) | ATE483834T1 (ja) |
CA (1) | CA2544878A1 (ja) |
DE (1) | DE602004029486D1 (ja) |
PL (1) | PL1682701T3 (ja) |
WO (1) | WO2005050709A2 (ja) |
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WO2005050709A2 (en) | 2005-06-02 |
JP4741506B2 (ja) | 2011-08-03 |
KR20070009976A (ko) | 2007-01-19 |
EP2267190A1 (en) | 2010-12-29 |
JP2007519591A (ja) | 2007-07-19 |
JP2013155108A (ja) | 2013-08-15 |
WO2005050709A3 (en) | 2005-12-29 |
US8728236B2 (en) | 2014-05-20 |
US20110140122A1 (en) | 2011-06-16 |
US20050103257A1 (en) | 2005-05-19 |
CN100577894C (zh) | 2010-01-06 |
JP5394322B2 (ja) | 2014-01-22 |
US20080003786A1 (en) | 2008-01-03 |
EP1682701B1 (en) | 2010-10-06 |
KR101119728B1 (ko) | 2012-03-23 |
EP1682701A4 (en) | 2007-02-14 |
US20080124510A1 (en) | 2008-05-29 |
DE602004029486D1 (de) | 2010-11-18 |
CN1894446A (zh) | 2007-01-10 |
ATE483834T1 (de) | 2010-10-15 |
EP1682701A2 (en) | 2006-07-26 |
PL1682701T3 (pl) | 2011-05-31 |
US7323256B2 (en) | 2008-01-29 |
JP2010215506A (ja) | 2010-09-30 |
EP2267190B1 (en) | 2015-08-12 |
US7879147B2 (en) | 2011-02-01 |
CA2544878A1 (en) | 2005-06-02 |
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