JP5345552B2 - 複数の窒化物ナノワイヤとその製造方法 - Google Patents
複数の窒化物ナノワイヤとその製造方法 Download PDFInfo
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Description
報告された業績は、この技術の素晴らしい潜在能力を示すが、積層欠陥や転位などの結晶欠陥なしにエピタキシァルで垂直方向に直立するGaN膜ナノワイヤを製造する方法を提供するために、および、工業的製造までスケールアップするためによく適合した方法を提供するために、改良が必要である。
a)基板105上に成長マスク111を提供する。基板は、例えば、GaNであり、成長マスクはSiNxまたはSiOxなどである。
b)成長マスク中に複数の開口部113を生成する。複数の開口部は、好ましくは、開口部直径と開口部の相対的な位置の両方に対してよく制御されている。この手順に対して、当技術分野で知られている電子線リソグラフィー(EBL)、ナノインプリントリゾグラフィ、光学リソグラフィー、および反応イオンエッチング(RIE)または湿式化学的エッチング方法を含むいくつかの技術は、限定無しに利用することができる。好ましくは、複数の開口部の直径は100nmであり、0.5〜5μmのピッチ間隔を有する。複数の開口部は、生成するナノワイヤ105の位置と直径とを画定する。
c)CVD(化学蒸着法)によるナノワイヤの成長は、プレカーサ源流量が連続して存在しているプロセスに基づいている。プレカーサ源流量は、成長ゾーン中で低い過飽和度を達成するように調整されている。V/III比は、1〜100の範囲、好ましくは、1〜50の範囲、さらに好ましくは、5〜50の範囲である。このV/III比は、膜成長のために使用されるV/III比よりかなり低いものであることに注意すべきである。
Claims (10)
- 選択領域を成長させる技術をベースとする化学蒸着法(CVD)を利用して複数の窒化基半導体のナノワイヤを成長させる方法であって、
ナノワイヤの成長工程中に窒素源と有機金属源とが存在し、
前記方法は、
(a)基板(110)上に成長マスク(111)を提供する提供工程と、
(b)前記成長マスク(111)中に複数の開口(113)を生成する生成工程と、
(c)複数のナノワイヤを成長させる成長工程と、
を有し、
前記窒素源と前記有機金属のプレカーサ源とが連続して流れており、
前記方法は、前記ナノワイヤを成長させる成長工程(c)の後に、前記複数のナノワイヤ上にシェル層を形成する少なくとも1つの成長工程を含む平らな成長工程を実施する工程をさらに有し、
前記平らな成長工程中のV/III比は、前記ナノワイヤ成長工程のV/III比よりも高い、ことを特徴とする方法。 - 窒素源の流量と金属有機源の流量との比であるV/III比が1〜100の範囲内であることを特徴とする請求項1に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記V/III比が1〜50の範囲内であることを特徴とする請求項2に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記V/III比が5〜50の範囲内であることを特徴とする請求項3に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記V/III比が前記ナノワイヤの成長工程中、一定であることを特徴とする請求項1乃至請求項4のうちのいずれか1項に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記窒化基半導体がGaNであり、前記窒素源がアンモニア(NH3)であり、前記有機金属源がトリメチルガリウム(TMG)であることを特徴とする請求項1乃至請求項5のうちのいずれか1項に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記窒素源と前記有機金属のプレカーサ源とのうちの少なくとも1つが流れているが、ナノワイヤの成長が全く現れないような条件に調整されている前処理工程(C’)をさらに有することを特徴とする請求項1に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記前処理工程(C’)は、アニーリング工程を含むことを特徴とする請求項7に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記平らな成長工程のV/III比は、前記ナノワイヤ成長工程のV/III比よりも少なくとも10倍高いことを特徴とする請求項1に記載の窒化基半導体のナノワイヤを成長させる方法。
- 前記窒化基半導体のナノワイヤの成長条件を安定させるために、ドーピング源を導入することを特徴とする請求項1乃至請求項9のうちのいずれか1項に記載の窒化基半導体のナノワイヤを成長させる方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0700102 | 2007-01-12 | ||
| SE0700102-7 | 2007-01-12 | ||
| PCT/SE2008/050036 WO2008085129A1 (en) | 2007-01-12 | 2008-01-14 | Nitride nanowires and method of producing such |
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| JP2013168662A Division JP5807044B2 (ja) | 2007-01-12 | 2013-08-14 | 複数の窒化物ナノワイヤの製造方法 |
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| JP2010515651A JP2010515651A (ja) | 2010-05-13 |
| JP5345552B2 true JP5345552B2 (ja) | 2013-11-20 |
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| US (6) | US7829443B2 (ja) |
| EP (1) | EP2102899B1 (ja) |
| JP (2) | JP5345552B2 (ja) |
| KR (2) | KR101549270B1 (ja) |
| CN (1) | CN101681813B (ja) |
| AU (1) | AU2008203934C1 (ja) |
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| JP5345552B2 (ja) | 2007-01-12 | 2013-11-20 | クナノ アーベー | 複数の窒化物ナノワイヤとその製造方法 |
| EP2175480A4 (en) * | 2007-07-19 | 2012-12-19 | Mitsubishi Chem Corp | GROUP III NITRIDE SEMICONDUCTOR SUBSTRATE AND METHOD FOR CLEANING THE SAME |
| US8668833B2 (en) * | 2008-05-21 | 2014-03-11 | Globalfoundries Singapore Pte. Ltd. | Method of forming a nanostructure |
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| JP5014403B2 (ja) * | 2009-11-19 | 2012-08-29 | シャープ株式会社 | 棒状構造発光素子、発光装置、発光装置の製造方法、バックライト、照明装置および表示装置 |
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| JP5094824B2 (ja) * | 2009-10-19 | 2012-12-12 | シャープ株式会社 | 棒状構造発光素子、バックライト、照明装置および表示装置 |
| US8563395B2 (en) * | 2009-11-30 | 2013-10-22 | The Royal Institute For The Advancement Of Learning/Mcgill University | Method of growing uniform semiconductor nanowires without foreign metal catalyst and devices thereof |
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| AU2008203934A2 (en) | 2009-09-03 |
| AU2008203934B2 (en) | 2013-11-07 |
| JP2010515651A (ja) | 2010-05-13 |
| US8309439B2 (en) | 2012-11-13 |
| AU2008203934C1 (en) | 2014-03-13 |
| US20140061586A1 (en) | 2014-03-06 |
| EP2102899A4 (en) | 2015-04-01 |
| US20170229613A1 (en) | 2017-08-10 |
| JP5807044B2 (ja) | 2015-11-10 |
| CN101681813A (zh) | 2010-03-24 |
| US20130072001A1 (en) | 2013-03-21 |
| US9947831B2 (en) | 2018-04-17 |
| WO2008085129A1 (en) | 2008-07-17 |
| US9660136B2 (en) | 2017-05-23 |
| EP2102899B1 (en) | 2020-11-11 |
| KR101549270B1 (ko) | 2015-09-01 |
| US20100163840A1 (en) | 2010-07-01 |
| KR20090101960A (ko) | 2009-09-29 |
| CA2674448A1 (en) | 2008-07-17 |
| CN101681813B (zh) | 2012-07-11 |
| US8664094B2 (en) | 2014-03-04 |
| US9024338B2 (en) | 2015-05-05 |
| US20110143472A1 (en) | 2011-06-16 |
| HK1142717A1 (en) | 2010-12-10 |
| US7829443B2 (en) | 2010-11-09 |
| EP2102899A1 (en) | 2009-09-23 |
| JP2014001135A (ja) | 2014-01-09 |
| KR20150052343A (ko) | 2015-05-13 |
| AU2008203934A1 (en) | 2008-07-17 |
| US20150221817A1 (en) | 2015-08-06 |
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