JP7059257B2 - 加工基板と統合された電子パワーデバイス - Google Patents
加工基板と統合された電子パワーデバイス Download PDFInfo
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- JP7059257B2 JP7059257B2 JP2019510893A JP2019510893A JP7059257B2 JP 7059257 B2 JP7059257 B2 JP 7059257B2 JP 2019510893 A JP2019510893 A JP 2019510893A JP 2019510893 A JP2019510893 A JP 2019510893A JP 7059257 B2 JP7059257 B2 JP 7059257B2
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- layer
- epitaxial
- gallium nitride
- type gallium
- forming
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- 239000010410 layer Substances 0.000 claims description 972
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 216
- 229910002601 GaN Inorganic materials 0.000 claims description 212
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- 238000005304 joining Methods 0.000 claims description 15
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical group [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 claims description 14
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- 238000001465 metallisation Methods 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- AUCDRFABNLOFRE-UHFFFAOYSA-N alumane;indium Chemical compound [AlH3].[In] AUCDRFABNLOFRE-UHFFFAOYSA-N 0.000 description 1
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- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 description 1
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/04—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body
- H01L27/10—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration
- H01L27/105—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being a semiconductor body including a plurality of individual components in a repetitive configuration including field-effect components
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
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Description
[0001]本出願は、2016年8月23日に出願された米国仮特許出願第62/378,382号の優先権を主張し、その開示はすべての目的のためにその全体が参照により本明細書に組み込まれる。
Claims (40)
- 基板であって、
多結晶セラミックコアと、
前記多結晶セラミックコアに結合された第1の接着層と、
前記第1の接着層に結合されたバリア層と、
前記バリア層に結合された接合層と、
前記接合層に結合された実質的単結晶層と、を含む基板と、
前記実質的単結晶層に結合されたバッファ層と、
前記バッファ層に結合されたチャネル領域であって、第1の端部、第2の端部、および前記第1の端部と前記第2の端部との間に配置された中央部分を含み、前記バッファ層に結合されたチャネル領域バリア層を含むチャネル領域と、
前記チャネル領域の前記第1の端部に配置されたソースコンタクトと、
前記チャネル領域の前記第2の端部に配置されたドレインコンタクトと、
前記チャネル領域に結合されたゲートコンタクトと、
を含むパワーデバイス。 - 前記チャネル領域バリア層に結合されたキャップ層をさらに含み、
前記ゲートコンタクトは前記キャップ層に結合され、かつ前記チャネル領域の前記中央部分に配置される、請求項1に記載のパワーデバイス。 - 前記チャネル領域バリア層に結合された絶縁層であって、前記ゲートコンタクトが結合される、絶縁層と、
前記チャネル領域の前記中央部分にある凹部であって、前記凹部に前記絶縁層および前記ゲートコンタクトが配置される、凹部と、をさらに含む、請求項1に記載のパワーデバイス。 - 前記チャネル領域バリア層に結合されたエピタキシャルゲート構造をさらに含み、前記ゲートコンタクトは前記エピタキシャルゲート構造に結合され、かつ前記チャネル領域の前記中央部分に配置される、請求項1に記載のパワーデバイス。
- 前記エピタキシャルゲート構造は、P型窒化ガリウムエピタキシャル層を含む、請求項4に記載のパワーデバイス。
- 前記エピタキシャルゲート構造は複数のエピタキシャル層を含み、前記複数のエピタキシャル層の各層は層特有のドーパント濃度と関連付けられる、請求項4に記載のパワーデバイス。
- 前記バッファ層および前記チャネル領域バリア層は、前記基板の熱膨張率(CTE)に実質的に等しいCTEによって特徴付けられる、請求項1に記載のパワーデバイス。
- 前記実質的単結晶層に結合された導電性エピタキシャル層をさらに含む、請求項1に記載のパワーデバイス。
- 前記ソースコンタクトと、前記導電性エピタキシャル層および前記実質的単結晶層のうちの少なくとも一方と、の間に接続されたビアをさらに含む、請求項8に記載のパワーデバイス。
- 前記導電性エピタキシャル層に結合された背面コンタクトをさらに含み、前記基板は前記パワーデバイスから除去される、請求項8に記載のパワーデバイス。
- 前記バッファ層はエピタキシャル成長によって形成される、請求項1に記載のパワーデバイス。
- 前記バッファ層は、約20ミクロンを超える厚さを有する、請求項11に記載のパワーデバイス。
- 前記基板は、前記実質的単結晶層に結合された核形成層をさらに含む、請求項1に記載のパワーデバイス。
- パワーデバイスを形成する方法であって、
基板を形成するステップであって、
多結晶セラミックコアを提供するステップと、
前記多結晶セラミックコアを第1の接着シェルで封入するステップと、
前記第1の接着シェルをバリア層で封入するステップと、
前記バリア層上に接合層を形成するステップと、
前記接合層に実質的単結晶層を接合するステップと、によって前記基板を形成するステップと、
前記実質的単結晶層上にバッファ層を形成するステップと、
前記バッファ層上にチャネル領域を形成するステップであって、
前記バッファ層上にエピタキシャルチャネル領域バリア層を形成するステップであり、前記チャネル領域は、第1の端部、第2の端部、および前記第1の端部と前記第2の端部との間の中央部分を有する、ステップと、
前記チャネル領域の前記第1の端部にソースコンタクトを形成するステップと、
前記チャネル領域の前記第2の端部にドレインコンタクトを形成するステップと、
前記チャネル領域上にゲートコンタクトを形成するステップと、
を含む方法。 - 前記エピタキシャルチャネル領域バリア層上にキャップ層を形成するステップと、
前記チャネル領域の前記中央部分の前記キャップ層上に前記ゲートコンタクトを形成するステップと、
をさらに含む、請求項14に記載の方法。 - 前記エピタキシャルチャネル領域バリア層に凹部を形成するステップと、
前記エピタキシャルチャネル領域バリア層に結合された絶縁層を前記凹部に形成するステップと、
前記チャネル領域の前記中央部分の前記凹部の前記絶縁層上に前記ゲートコンタクトを形成するステップと、
をさらに含む、請求項14に記載の方法。 - 前記エピタキシャルチャネル領域バリア層に結合されたエピタキシャルゲート構造を前記チャネル領域の前記中央部分に形成するステップと、
前記チャネル領域の前記中央部分の前記エピタキシャルゲート構造上に前記ゲートコンタクトを形成するステップと、
をさらに含む、請求項14に記載の方法。 - 前記エピタキシャルゲート構造は、P型窒化ガリウムエピタキシャル層を含む、請求項17に記載の方法。
- 前記エピタキシャルゲート構造を形成するステップは、複数のエピタキシャル層を形成するステップを含み、前記複数のエピタキシャル層の各層は、層特有のドーパント濃度と関連付けられる、請求項17に記載の方法。
- 前記バッファ層および前記エピタキシャルチャネル領域バリア層は、前記基板の熱膨張率(CTE)に実質的に等しいCTEによって特徴付けられる、請求項14に記載の方法。
- 基板であって、
多結晶セラミックコアと、
前記多結晶セラミックコアに結合された第1の接着層と、
前記第1の接着層に結合されたバリア層と、
前記バリア層に結合された接合層と、
前記接合層に結合された実質的単結晶層と、を含む基板と、
前記実質的単結晶層に結合されたバッファ層と、
前記バッファ層に結合された半絶縁層と、
前記半絶縁層に結合され、第1のドーピング濃度を有する第1のN型窒化ガリウム層と、
前記第1のN型窒化ガリウム層に結合され、前記第1のドーピング濃度より低い第2のドーピング濃度を有する第2のN型窒化ガリウム層と、
前記第2のN型窒化ガリウム層に結合されたP型窒化ガリウム層と、
前記P型窒化ガリウム層に結合されたアノードコンタクトと、
前記第1のN型窒化ガリウム層の一部分に結合されカソードコンタクトと、
を含む半導体ダイオード。 - 前記バッファ層は、
前記実質的単結晶層に結合された窒化アルミニウム層と、
前記窒化アルミニウム層に結合された窒化アルミニウムガリウム層と、
前記窒化アルミニウムガリウム層に結合された窒化ガリウム層と、
を含む、請求項21に記載の半導体ダイオード。 - 前記半絶縁層は窒化ガリウムを含む、請求項21に記載の半導体ダイオード。
- 前記基板は、
前記第1の接着層に結合された導電層と、
前記導電層に結合された第2の接着層と、をさらに含み、前記導電層および前記第2の接着層は、前記第1の接着層と前記バリア層との間に配置される、請求項21に記載の半導体ダイオード。 - 前記第1のN型窒化ガリウム層、前記第2のN型窒化ガリウム層、および前記P型窒化ガリウム層は、エピタキシャル成長によって形成される、請求項21に記載の半導体ダイオード。
- 前記第2のN型窒化ガリウム層は、約20μmを超える厚さを有する、請求項25に記載の半導体ダイオード。
- 前記第1のN型窒化ガリウム層、前記第2のN型窒化ガリウム層、および前記P型窒化ガリウム層は、前記基板の熱膨張率(CTE)に実質的に等しいCTEによって特徴付けられる、請求項25に記載の半導体ダイオード。
- 半導体ダイオードを形成する方法であって、
基板を形成するステップであって、
多結晶セラミックコアを提供するステップと、
前記多結晶セラミックコアを第1の接着シェルで封入するステップと、
前記第1の接着シェルをバリア層で封入するステップと、
前記バリア層上に接合層を形成するステップと、
前記接合層に実質的単結晶層を接合するステップと、によって前記基板を形成するステップと、
前記実質的単結晶層上にバッファ層を形成するステップと、
前記バッファ層上に半絶縁層を形成するステップと、
第1のドーピング濃度を有する第1のエピタキシャルN型窒化ガリウム層を前記半絶縁層上に形成するステップと、
前記第1のドーピング濃度より低い第2のドーピング濃度を有する第2のエピタキシャルN型窒化ガリウム層を前記第1のエピタキシャルN型窒化ガリウム層上に形成するステップと、
前記第2のエピタキシャルN型窒化ガリウム層上にエピタキシャルP型窒化ガリウム層を形成するステップと、
前記第2のエピタキシャルN型窒化ガリウム層の一部分および前記エピタキシャルP型窒化ガリウム層の一部分を除去して、前記第1のエピタキシャルN型窒化ガリウム層の一部分を露出させるステップと、
前記エピタキシャルP型窒化ガリウム層の残りの部分にアノードコンタクトを形成するステップと、
前記第1のエピタキシャルN型窒化ガリウム層の露出部分上にカソードコンタクトを形成するステップと、
を含む方法。 - 前記基板を形成するステップは、
前記第1の接着シェルを導電性シェルで封入するステップと、
前記導電性シェルを第2の接着シェルで封入するステップであって、前記バリア層が前記導電性シェルを封入する、ステップと、
をさらに含む、請求項28に記載の方法。 - 前記第2のエピタキシャルN型窒化ガリウム層は、約20ミクロンを超える厚さを有する、請求項28に記載の方法。
- 前記第1のエピタキシャルN型窒化ガリウム層、前記第2のエピタキシャルN型窒化ガリウム層、および前記エピタキシャルP型窒化ガリウム層は、前記基板の熱膨張率(CTE)に実質的に等しいCTEによって特徴付けられる、請求項28に記載の方法。
- 前記多結晶セラミックコアは窒化アルミニウムを含む、請求項28に記載の方法。
- 前記実質的単結晶層は実質的に単結晶のシリコン層を含む、請求項28に記載の方法。
- 半導体ダイオードを形成する方法であって、
基板を形成するステップであって、
多結晶セラミックコアを提供するステップと、
前記多結晶セラミックコアを第1の接着シェルで封入するステップと、
前記第1の接着シェルをバリア層で封入するステップと、
前記バリア層上に接合層を形成するステップと、
前記接合層に実質的単結晶層を接合するステップと、によって前記基板を形成するステップと、
第1のドーピング濃度を有する第1のエピタキシャルN型窒化ガリウム層を前記実質的単結晶層上に形成するステップと、
前記第1のドーピング濃度より低い第2のドーピング濃度を有する第2のエピタキシャルN型窒化ガリウム層を前記第1のエピタキシャルN型窒化ガリウム層上に形成するステップと、
前記第2のエピタキシャルN型窒化ガリウム層上にエピタキシャルP型窒化ガリウム層を形成するステップと、
前記基板の一部分を除去して前記第1のエピタキシャルN型窒化ガリウム層の表面を露出させるステップと、
前記エピタキシャルP型窒化ガリウム層上にアノードコンタクトを形成するステップと、
前記第1のエピタキシャルN型窒化ガリウム層の前記露出表面上にカソードコンタクトを形成するステップと、
を含む方法。 - 前記基板の前記一部分を除去して前記第1のエピタキシャルN型窒化ガリウム層の前記表面を露出させるステップは、
前記第1のエピタキシャルN型窒化ガリウム層の一部分を除去するステップをさらに含む、請求項34に記載の方法。 - 前記基板を形成するステップは、
前記第1の接着シェルを導電性シェルで封入するステップと、
前記導電性シェルを第2の接着シェルで封入するステップであって、前記バリア層が前記導電性シェルを封入する、ステップと、
をさらに含む、請求項34に記載の方法。 - 前記第2のエピタキシャルN型窒化ガリウム層は、約20ミクロンを超える厚さを有する、請求項34に記載の方法。
- 前記第1のエピタキシャルN型窒化ガリウム層、前記第2のエピタキシャルN型窒化ガリウム層、および前記エピタキシャルP型窒化ガリウム層は、前記基板の熱膨張率(CTE)に実質的に等しいCTEによって特徴付けられる、請求項34に記載の方法。
- 前記多結晶セラミックコアは窒化アルミニウムを含む、請求項34に記載の方法。
- 前記実質的単結晶層は実質的に単結晶のシリコン層を含む、請求項34に記載の方法。
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