JP2021527618A - グラフェンおよび/または六方晶窒化ホウ素を備えている層の上での炭化ケイ素の成長のためのシステムおよび方法ならびに関連物品 - Google Patents
グラフェンおよび/または六方晶窒化ホウ素を備えている層の上での炭化ケイ素の成長のためのシステムおよび方法ならびに関連物品 Download PDFInfo
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Abstract
Description
本願は、35 U.S.C. §119(e)の下で、あらゆる目的のために参照することによってその全体として本明細書に組み込まれる2018年6月22日に出願され、「REDUCTION OF BASAL PLANE DISLOCATIONS IN EPITAXIAL SIC USING AN IN−SITU ETCH PROCESS」と題された米国仮特許出願第62/688,472号の利益を主張する。
グラフェンおよび/または六方晶窒化ホウ素を備えている層の上での炭化ケイ素の成長のためのシステムおよび方法ならびに関連物品が、概して、説明される。
先進電子およびフォトニック技術では、デバイスが、通常、少なくとも2つの化学元素を含む化合物半導体等の機能的半導体から製作される。これらの機能的半導体の格子定数は、典型的に、シリコン基板の格子定数に合致しない。当技術分野で理解されるように、基板と基板上のエピタキシャル層(エピ層)との間の格子定数不一致は、エピタキシャル層の中に歪みを導入し、それによって、欠陥がないより厚い層のエピタキシャル成長を妨げ得る。したがって、非シリコン(非Si)基板が、通常、殆どの機能的半導体のエピタキシャル成長のための種晶として採用される。しかしながら、機能的材料のそれらに合致する格子定数を伴う非Si基板は、高価であり、したがって、非Si電子/フォトニックデバイスの開発を限定し得る。
グラフェンおよび/または六方晶窒化ホウ素を備えている層の上での炭化ケイ素の成長のためのシステムおよび方法ならびに関連物品が、概して、説明される。
グラフェンおよび/または六方晶窒化ホウ素を備えている層の上での炭化ケイ素の成長のためのシステムおよび方法ならびに関連物品が、概して、説明される。
本実施例は、概して、例えば、遠隔エピタキシによる、SiC膜の成長を説明する。
Claims (31)
- 方法であって、前記方法は、
基板の上にあるグラフェンおよび/または六方晶窒化ホウ素(hBN)を備えている層の上に炭化ケイ素(SiC)膜を形成することを含み、
前記SiC膜の形成の少なくとも一部は、不活性ガスを備えているガス状物質の存在下で生じる、方法。 - 前記不活性ガスは、アルゴン、ヘリウム、および/または窒素(N2)を備えている、請求項1に記載の方法。
- 前記SiC膜と前記基板とを分離することをさらに含む、請求項1−2のいずれかの請求項に記載の方法。
- 前記SiC膜は、結晶である、請求項1−3のいずれかの請求項に記載の方法。
- 前記SiC膜は、単結晶である、請求項1−4のいずれかの請求項に記載の方法。
- 前記基板の上に前記層を形成することをさらに含む、請求項1−5のいずれかの請求項に記載の方法。
- 前記基板の上に前記層を形成することは、前記基板の上に前記層を成長させることを含む、請求項6に記載の方法。
- 前記基板は、第1の基板であり、前記第1の基板の上に前記層を形成することは、第2の基板から前記第1の基板に前記層を転写することを含む、請求項6に記載の方法。
- 前記層は、グラフェンおよび/または六方晶窒化ホウ素(hBN)を備えている複数の層のうちの1つであり、前記SiC膜を形成することは、前記複数の層の上に前記SiC膜を形成することを含む、請求項1−8のいずれかの請求項に記載の方法。
- 前記層は、前記SiC膜と前記基板との間の唯一の層である、請求項1−9のいずれかの請求項に記載の方法。
- 前記層は、単結晶層である、請求項1−10のいずれかの請求項に記載の方法。
- 前記層は、多結晶層である、請求項1−11のいずれかの請求項に記載の方法。
- 前記層の上に前記SiC膜を形成することは、前記SiC膜のための種晶として前記基板を使用することを含む、請求項1−12のいずれかの請求項に記載の方法。
- 前記分離中、前記層は、解放層として使用される、請求項1−13のいずれかの請求項に記載の方法。
- 前記層の上に前記SiC膜を形成することは、前記SiC膜のための種晶として前記層を使用することを含む、請求項1−14のいずれかの請求項に記載の方法。
- 前記層の上に前記SiC膜を形成することは、前記SiC膜のための種晶として前記基板と前記層との組み合わせを使用することを含む、請求項1−15のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的にSiCから作製される、請求項1−16のいずれかの請求項に記載の方法。
- 前記層が成長中に位置付けられる前記基板の表面は、SiC表面である、請求項1−17のいずれかの請求項に記載の方法。
- 前記SiC膜と前記基板とを分離することは、前記SiC膜を剥離することを含む、請求項1−18のいずれかの請求項に記載の方法。
- 前記SiC膜は、第1のSiC膜であり、前記第1のSiC膜と前記基板とが分離された後、前記基板の上に第2のSiC膜を形成することをさらに含む、請求項1−19のいずれかの請求項に記載の方法。
- 前記基板は、半導体基板である、請求項1−20のいずれかの請求項に記載の方法。
- 前記層は、前記基板の直接上にある、請求項1−21のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的に0°〜10°のオフカット角を有するSiCから作製される、請求項1−22のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的に4°軸外SiCから作製される、請求項1−23のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的に2°軸外SiCから作製される、請求項1−24のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的に軸上SiCから作製される、請求項1−25のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的に(0001)4H−SiCおよび/または(0001)6H−SiCから作製される、請求項1−26のいずれかの請求項に記載の方法。
- 不活性ガスを備えているガス状物質を備えている環境を成長温度まで傾斜させることをさらに含み、前記環境は、前記基板上の前記グラフェンおよび/またはhBNを備えている前記層の環境であり、10標準リットル/分(slm)〜80slmの前記ガス状物質の流量を伴う、請求項1−27のいずれかの請求項に記載の方法。
- 前記炭化ケイ素膜の形成の少なくとも1つの部分は、前記基板上の前記グラフェンおよび/またはhBNを備えている前記層の環境の1,350℃〜1,800℃の成長温度において生じる、請求項1−28のいずれかの請求項に記載の方法。
- 前記不活性ガスを備えている前記ガス状物質は、3分〜90分にわたって、前記炭化ケイ素膜の形成の少なくとも1つの部分中に存在する、請求項1−29のいずれかの請求項に記載の方法。
- 前記基板は、全体的または部分的にIII族窒化物から作製される、請求項1−30のいずれかの請求項に記載の方法。
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