JP2016504752A - 遷移金属バッファ層を備えるナノワイヤを含む電子デバイス、少なくとも1つのナノワイヤを成長させる方法、及びデバイスの製造方法 - Google Patents
遷移金属バッファ層を備えるナノワイヤを含む電子デバイス、少なくとも1つのナノワイヤを成長させる方法、及びデバイスの製造方法 Download PDFInfo
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- JP2016504752A JP2016504752A JP2015538471A JP2015538471A JP2016504752A JP 2016504752 A JP2016504752 A JP 2016504752A JP 2015538471 A JP2015538471 A JP 2015538471A JP 2015538471 A JP2015538471 A JP 2015538471A JP 2016504752 A JP2016504752 A JP 2016504752A
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Abstract
Description
・定比化合物は、50〜100%の遷移金属の構成比を有する。
・定比化合物は、窒化ガリウムのエピタキシーに好適な結晶構造、特に、面心立方格子構造又は六方格子構造を有する。
・窒素濃度の公差ΔNは、10%以下である。
・定比化合物は、50〜100%の遷移金属の構成比を有する。
・定比化合物は、窒化ガリウムのエピタキシーに好適な結晶構造、特に、面心立方格子構造又は六方格子構造を有する。
・窒素濃度の公差ΔNは、10%以下である。
・定比化合物は、50〜100%の遷移金属の構成比を有する。
・定比化合物は、窒化ガリウムのエピタキシーに好適な結晶構造、特に、面心立方格子構造又は六方格子構造を有する。
・窒素濃度の公差ΔNが10%以下である(すなわち、定比化合物の最小窒素濃度と最大窒素濃度との間の差が10%以下であり、この値は、化学量差(stoichiometric difference)とも呼ばれる)。この公差によって、定比化合物の化学的及び熱的安定性を保証することができる。
Claims (19)
- 基板(1)と、少なくとも1つの半導体ナノワイヤ(2)と、前記基板(1)と前記ナノワイヤ(2)との間に介在するバッファ層(3)とを備え、前記バッファ層(3)は、少なくとも部分的に遷移金属窒化物からなる遷移金属窒化物層(9)によって形成され、ここから、前記ナノワイヤ(2)が延び出し、前記遷移金属窒化物は、窒化バナジウム、窒化クロム、窒化ジルコニウム、窒化ニオブ、窒化モリブデン、窒化ハフニウム及び窒化タンタルから選択され、前記バッファ層(3)は、導電性を有し、前記基板(1)の少なくとも1つの導電性部分と前記ナノワイヤ(2)とを電気的に接触させる電子デバイス。
- 前記遷移金属窒化物層(9)は、窒化遷移金属定比化合物であり、
前記定比化合物は、50乃至100%の遷移金属の構成比を有し、
前記定比化合物は、窒化ガリウムのエピタキシーに好適な結晶構造、特に、面心立方格子構造又は六方格子構造を有し、
窒素濃度の公差ΔNが10%以下である請求項1記載の電子デバイス。 - 前記基板(1)から遠位の前記ナノワイヤ(2)の端部(2b)が第1のタイプに電気的にドーピングされ、更に、前記基板(1)から遠位の前記ナノワイヤ(2)の端部(2b)に配設された、第2のタイプにドーピングされた導電性要素を更に備え、電気接合、特に発光ダイオード接合を形成する請求項1又は2記載の電子デバイス。
- 前記ナノワイヤ(2)を分極する要素を備え、前記ナノワイヤ(2)のレベルで光波を生成する請求項1乃至3何れか1項記載の電子デバイス。
- 少なくとも1つの半導体ナノワイヤ(2)を成長させる方法において、基板(1)上に少なくとも部分的に、ナノワイヤ(2)の成長のための核生成層(9)によって、バッファ層(3)を形成するステップと、前記核生成層から前記ナノワイヤ(2)を成長させるステップとを有し、前記核生成層は、窒化バナジウム、窒化クロム、窒化ジルコニウム、窒化ニオブ、窒化モリブデン、窒化ハフニウム及び窒化タンタルから選択される遷移金属窒化物の層(9)によって形成され、前記バッファ層(3)は、導電性を有し、前記基板(1)の少なくとも1つの導電性部分と、前記ナノワイヤ(2)との間の電気的接触を実現する方法。
- 前記バッファ層(3)は、窒素と、バナジウム、クロム、ジルコニウム、ニオブ、モリブデン、ハフニウム及びタンタルから選択される遷移金属とを含む気体混合物から、気相として堆積され、及び前記バッファ層(3)は、室温から400℃の間の温度で堆積される請求項5記載の方法。
- 前記バッファ層(3)は、
前記基板(1)に、バナジウム、クロム、ジルコニウム、ニオブ、モリブデン、ハフニウム及びタンタルから選択される遷移金属を材料とする遷移金属層(6)を、室温乃至400℃の温度で堆積させ、
前記堆積された遷移金属層(6)の少なくとも一部(9)を窒化させ、前記ナノワイヤ(2)を成長させることを意図した表面を有する遷移金属窒化物層(9)を形成することによって作成される請求項5記載の方法。 - 前記遷移金属窒化物層(9)は、窒化遷移金属定比化合物から形成され、
前記定比化合物は、50乃至100%の遷移金属の構成比を有し、
前記定比化合物は、窒化ガリウムのエピタキシーに好適な結晶構造、特に、面心立方格子構造又は六方格子構造を有し、
窒素濃度の公差ΔNが10%以下である請求項5乃至7何れか1項記載の方法。 - 前記遷移金属層(6)の少なくとも一部の窒化のステップが実行されることによって、前記遷移金属層の結晶構造の少なくとも一部が、面心立方格子構造又は六方格子構造に沿って配向するように変更される請求項7、又は請求項7及び8記載の方法。
- 前記窒化ステップは、
第1の流量で窒化ガスを注入することによって少なくとも部分的に第1の温度で実行される第1の窒化サブステップ(En1)と、
前記第1の流量と異なる又は等しい第2の流量で窒化ガスを注入し、少なくとも部分的に前記第1の温度以下の第2の温度で実行される第2の窒化サブステップ(En2)とを含む請求項7、又は請求項7及び請求項8又は9記載の方法。 - 前記注入される窒化ガスは、アンモニアであり、
前記第1の温度は、1000℃乃至1050℃、特に1050℃であり、
対応する窒化チャンバの総容積をリットルで表した値をVとして、
前記第1の流量は、500*V/8sccm乃至2500*V/8sccm、特に1600*V/8sccmであり、
前記第2の温度は、950℃乃至1050℃、特に1000℃であり、
前記第2の流量は、500*V/8sccm乃至2500*V/8sccm、特に500*V/8sccmである請求項10記載の方法。 - 前記窒化ステップは、
第1の流量で窒化ガスを注入することによって少なくとも部分的に第1の温度で実行される第1の窒化サブステップ(En1)と、
前記第1の流量と異なる又は等しい第2の流量で窒化ガスを注入し、少なくとも部分的に前記第1の温度以上の第2の温度で実行される第2の窒化サブステップ(En2)とを含む請求項7、又は請求項7及び請求項8又は9記載の方法。 - 前記窒化ステップは、50mbar乃至800mbar、特に100mbarの圧力に調整された窒化チャンバで実行される請求項10乃至12何れか1項記載の方法。
- 前記ナノワイヤ(3)の成長ステップは、前記第2の窒化サブステップ(En2)の後に実行され、又は前記第2の窒化サブステップ(En2)の間に開始される請求項10乃至13何れか1項記載の方法。
- 前記基板(1)は、シリコンであり、前記遷移金属層(6)を堆積させるステップは、前記堆積される遷移金属層への前記シリコンの相互拡散が10nmより小さくなるように、及び/又は少なくとも2nmの前記遷移金属層の非珪化スライスが残存するように構成される請求項7、又は請求項7及び8乃至14何れか1項記載の方法。
- 前記堆積される遷移金属は、Cr及びVから選択され、前記遷移金属は、100℃未満の温度で堆積される請求項7、又は請求項7及び8乃至15何れか1項記載の方法。
- 前記基板は、シリコン系の基板であり、
前記遷移金属層(6)を堆積させるステップは、堆積させる遷移金属層(6)の厚さを決定する予備的ステップを含み、前記予備的ステップは、
使用される前記遷移金属及び堆積温度の関数として、前記遷移金属層(6)の将来の堆積の間の前記遷移金属層(6)へのシリコンの第1の拡散距離を判定するステップと、
将来の前記遷移金属層(6)の窒化のステップの間の前記遷移金属層(6)へのシリコンの第2の拡散距離を判定するステップとを含み、
前記堆積される遷移金属窒化物層の厚さは、前記遷移金属層(6)の所望の厚さと、前記判定された第1及び第2の拡散距離から将来の前記遷移金属層(6)に生じる遷移金属の珪化スライスの厚さとに基づいて決定される請求項7、又は請求項7及び8乃至16何れか1項記載の方法。 - 請求項1乃至4記載のデバイスを製造する方法において、
請求項5乃至17何れか1項記載の成長方法を実行するステップを有する方法。 - 前記基板(1)の反対側の前記ナノワイヤ(2)の少なくとも1つの端部(2b)に第1のタイプの電気的ドーピングを行うステップと、
前記基板(1)の反対側の前記ナノワイヤ(2)の端部(2b)に、前記第1のタイプとは逆の第2のタイプに電気的にドーピングされた要素(5)を形成するステップとを有する請求項18記載の方法。
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US9991342B2 (en) | 2018-06-05 |
CN104904016A (zh) | 2015-09-09 |
FR2997557A1 (fr) | 2014-05-02 |
US9679966B2 (en) | 2017-06-13 |
US20140117308A1 (en) | 2014-05-01 |
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CN104904016B (zh) | 2019-10-11 |
JP6429783B2 (ja) | 2018-11-28 |
BR112015009307A2 (pt) | 2017-08-22 |
WO2014064264A2 (fr) | 2014-05-01 |
KR102205120B1 (ko) | 2021-01-20 |
FR2997557B1 (fr) | 2016-01-01 |
KR20150082346A (ko) | 2015-07-15 |
WO2014064264A3 (fr) | 2014-07-17 |
EP2912691B1 (fr) | 2022-08-24 |
EP2912691A2 (fr) | 2015-09-02 |
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