JP7074393B2 - 異なる歪み状態を有するフィン構造を含む半導体構造を作製するための方法及び関連する半導体構造 - Google Patents
異なる歪み状態を有するフィン構造を含む半導体構造を作製するための方法及び関連する半導体構造 Download PDFInfo
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- JP7074393B2 JP7074393B2 JP2020140933A JP2020140933A JP7074393B2 JP 7074393 B2 JP7074393 B2 JP 7074393B2 JP 2020140933 A JP2020140933 A JP 2020140933A JP 2020140933 A JP2020140933 A JP 2020140933A JP 7074393 B2 JP7074393 B2 JP 7074393B2
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Description
図1~図4は、本開示の実施形態により用いられてもよい多層基板の作製を示す簡略化された概略断面図である。
実施形態1
ベース基板、ベース基板の表面上の埋め込み酸化物層、ベース基板とは反対側の埋め込み酸化物層上の歪み主半導体層、及び埋め込み酸化物層とは反対側の歪み半導体層上のエピタキシャルベース層を含む、多層基板を用意するステップと、第1の領域内の主半導体層の歪み状態が第2の領域内の主半導体層の歪み状態と異なるように、元素をエピタキシャルベース層から多層基板の第2の領域内の歪み主半導体層へは拡散させずに、元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させ、第1の領域内の主半導体層の拡散させた元素の濃度を高くするステップと、多層基板の第1の領域内の主半導体層の一部をそれぞれが備える第1の複数のトランジスタチャネル構造、及び多層基板の第2の領域内の主半導体層の一部をそれぞれが備える第2の複数のトランジスタチャネル構造を形成するステップとを含む、半導体構造を作製する方法。
実施形態2
歪みシリコンを含むように歪み半導体層を選択するステップをさらに含む、実施形態1に記載の方法。
実施形態3
引張り歪みシリコンを含むように歪み半導体層を選択するステップをさらに含む、実施形態2に記載の方法。
実施形態4
SixGe1-xを含むようにエピタキシャルベース層を選択するステップであって、xが約0.01~約0.99であるステップをさらに含み、元素をエピタキシャルベース層から歪み主半導体層へ拡散させるステップが、多層基板の第1の領域内の歪み主半導体層へゲルマニウムを拡散させるステップを含む、ステップをさらに含む、実施形態1~3のいずれか一項に記載の方法。
実施形態5
第1の複数のトランジスタチャネル構造を形成するステップ及び第2の複数のトランジスタチャネル構造を形成するステップが、主半導体層を貫いてエッチングするステップ、及びそれぞれが主半導体層の一部を備え、それぞれがフィンFETで使用するためにサイズが調整され、構成されているフィン構造を規定するステップを含む、実施形態1~4のいずれか一項に記載の方法。
実施形態6
多層基板を用意するステップが、歪み半導体層をドナー基板上のエピタキシャルベース層にエピタキシャル成長させてドナー構造を形成するステップと、ドナー構造にイオンを注入し、ドナー構造内に脆弱ゾーンを形成するステップと、ドナー構造を、ベース基板を備えるレシーバ基板に接合するステップと、脆弱ゾーンに沿ってドナー構造を劈開して、歪み半導体層及びエピタキシャルベース層をベース基板に移しかえるステップと、を含む、実施形態1~5のいずれか一項に記載の方法。
実施形態7
ドナー構造をレシーバ基板に接合するステップが、ドナー構造及びレシーバ基板の1つ又は両方に酸化物層を設けるステップ、及び直接接合プロセスを使用してドナー構造をレシーバ基板に接合するステップを含む、実施形態6に記載の方法。
実施形態8
エピタキシャルベース層を備えるドナー基板の実質的に均質の領域内に脆弱ゾーンを配置するステップをさらに含む、実施形態6又は実施形態7に記載の方法。
実施形態9
元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させるステップが、多層基板の第1の領域内の主半導体層の歪みを緩和するステップを含む、実施形態1~8のいずれか一項に記載の方法。
実施形態10
元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させるステップが、多層基板の第1の領域内の主半導体層の圧縮歪みを引き起こすステップを含む、実施形態1~9のいずれか一項に記載の方法。
実施形態11
元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させるステップが、第1の領域内の主半導体層内の正孔移動度を増加させるステップを含む、実施形態1~10のいずれか一項に記載の方法。
実施形態12
元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させるステップが、多層基板の第1の領域内の主半導体層に対する凝縮プロセスを実行するステップを含む、実施形態1~11のいずれか一項に記載の方法。
実施形態13
多層基板の第1の領域内の主半導体層に対する凝縮プロセスを実行するステップが、多層基板の第1の領域内の主半導体層の一部を酸化させるステップを含む、実施形態12に記載の方法。
実施形態14
第1の複数のトランジスタチャネル構造を備える複数のp型FETトランジスタを形成するステップ、及び第2の複数のトランジスタチャネル構造を備える複数のn型FETトランジスタを形成するステップをさらに含む、実施形態1~13のいずれか一項に記載の方法。
実施形態15
ベース基板、ベース基板の表面上の埋め込み酸化物層、ベース基板とは反対側の埋め込み酸化物層上の歪み主半導体層、及び埋め込み酸化物層とは反対側の歪み半導体層上のエピタキシャルベース層を含む、多層基板を用意するステップと、第1のマスク層によって多層基板の第1の領域をマスクし多層基板の第2の領域からエピタキシャルベース層の一部を除去するステップと、多層基板の第1の領域から第1のマスク層を除去し第2のマスク層によって多層基板の第2の領域をマスクするステップと、元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させ、元素を多層基板の第2の領域内の歪み主半導体層へは拡散させずに多層基板の第1の領域内の主半導体層の歪み状態を変えるステップと、多層基板の第1の領域内の主半導体層の一部をそれぞれが備える第1の複数のトランジスタチャネル構造、及び多層基板の第2の領域内の主半導体層の一部をそれぞれが備える第2の複数のトランジスタチャネル構造を形成するステップと、を含む、半導体構造を作製する方法。
実施形態16
引張り歪みシリコンを含むように歪み半導体層を選択するステップをさらに含む、実施形態15に記載の方法。
実施形態17
少なくとも実質的に緩和したSixGe1-xを含むようにエピタキシャルベース層を選択するステップであって、xが約0.01~約0.99であるステップをさらに含み、元素をエピタキシャルベース層から多層基板の第1の領域内の歪み主半導体層へ拡散させるステップが、多層基板の第1の領域内の歪み主半導体層へゲルマニウムを拡散させるステップを含む、実施形態15又は実施形態16に記載の方法。
実施形態18
第1の複数のトランジスタチャネル構造を備える複数のp型FETトランジスタを形成するステップ、及び第2の複数のトランジスタチャネル構造を備える複数のn型FETトランジスタを形成するステップをさらに含む、実施形態15~17のいずれか一項に記載の方法。
実施形態19
ベース基板、ベース基板の表面上の埋め込み酸化物層、及びベース基板とは反対側の埋め込み酸化物層上の主半導体層であって、多層基板の第1の領域内の主半導体層の一部が、yが約0.20~約0.99であるSiyGe1-yを含み、多層基板の第2の領域内の主半導体層の一部が引張り歪みSiを含む、主半導体層と、を備え、多層基板の第1の領域内の主半導体層の一部が、多層基板の第2の領域内の主半導体層の一部の結晶学的な歪みと異なる結晶学的な歪みを有する、多層基板を含む半導体構造。
実施形態20
多層基板の第1の領域内の主半導体層の一部をそれぞれが備える第1の複数のp型FETトランジスタ、及び多層基板の第2の領域内の主半導体層の一部をそれぞれが備える第2の複数のn型FETトランジスタをさらに備える、実施形態19に記載の半導体構造。
102 バルク材料
104 エピタキシャルベース層
106 歪み半導体層
108 バッファ層
109 矢印
110 レシーバ基板
112 脆弱ゾーン
114 埋め込み酸化物層
120 多層基板
122 マスク層
124A 第1の領域
124B 第2の領域
126 マスク層
136 酸化物層
Claims (13)
- ベース基板、
前記ベース基板の表面上の埋め込み酸化物層、
前記ベース基板とは反対側の前記埋め込み酸化物層上の歪み主半導体層、及び
前記埋め込み酸化物層とは反対側の前記歪み主半導体層上のエピタキシャルベース層
を含む、多層基板を用意するステップであって、前記歪み主半導体層は、50nm以下の平均の層厚を有し、前記エピタキシャルベース層は、前記エピタキシャルベース層が、下に重なる前記歪み主半導体層の結晶格子の歪みを保持することができる特定の層厚を有する、ステップと、
第1の領域内の前記歪み主半導体層の歪み状態が第2の領域内の前記歪み主半導体層の歪み状態と異なるように、元素を前記多層基板の前記第2の領域内の前記エピタキシャルベース層から前記多層基板の前記第2の領域内の前記歪み主半導体層へは拡散させずに、元素を前記多層基板の前記第1の領域内の前記エピタキシャルベース層から前記多層基板の前記第1の領域内の前記歪み主半導体層へ拡散させ、前記第1の領域内の前記歪み主半導体層の前記拡散させた元素の濃度を高くするステップと、
前記多層基板の前記第1の領域内の前記歪み主半導体層の一部をそれぞれが備える第1の複数のトランジスタチャネル構造、及び前記多層基板の前記第2の領域内の前記歪み主半導体層の一部をそれぞれが備える第2の複数のトランジスタチャネル構造を形成するステップと、
を含む、半導体構造を作製する方法。 - 歪みシリコンを含むように前記歪み主半導体層を選択するステップをさらに含む、請求項1に記載の方法。
- 引張り歪みシリコンを含むように前記歪み主半導体層を選択するステップをさらに含む、請求項2記載の方法。
- SixGe1-xを含むように前記エピタキシャルベース層を選択するステップであって、xが0.01~0.99であるステップをさらに含み、元素を前記エピタキシャルベース層から前記歪み主半導体層へ拡散させるステップが、前記多層基板の前記第1の領域内の前記歪み主半導体層へゲルマニウムを拡散させるステップを含む、請求項2に記載の方法。
- 第1の複数のトランジスタチャネル構造を形成するステップ及び前記第2の複数のトランジスタチャネル構造を形成するステップが、前記歪み主半導体層を貫いてエッチングするステップ及びそれぞれが前記歪み主半導体層の一部を備え、それぞれがフィンFETで使用するためにサイズが調整され、構成されているフィン構造を規定するステップを含む、請求項1に記載の方法。
- 元素を前記エピタキシャルベース層から前記多層基板の前記第1の領域内の前記歪み主半導体層へ拡散させるステップが、前記多層基板の前記第1の領域内の前記歪み主半導体層の歪みを緩和するステップを含む、請求項1に記載の方法。
- 元素を前記エピタキシャルベース層から前記多層基板の前記第1の領域内の前記歪み主半導体層へ拡散させるステップが、前記多層基板の前記第1の領域内の前記歪み主半導体層の圧縮歪みを引き起こすステップを含む、請求項1に記載の方法。
- 元素を前記エピタキシャルベース層から前記多層基板の前記第1の領域内の前記歪み主半導体層へ拡散させるステップが、前記第1の領域内の前記歪み主半導体層内の正孔移動度を増加させるステップを含む、請求項1に記載の方法。
- 元素を前記エピタキシャルベース層から前記多層基板の前記第1の領域内の前記歪み主半導体層へ拡散させるステップが、前記多層基板の前記第1の領域内の前記歪み主半導体層に対する凝縮プロセスを実行するステップを含む、請求項1に記載の方法。
- 前記多層基板の前記第1の領域内の前記歪み主半導体層に対する凝縮プロセスを実行するステップが、前記多層基板の前記第1の領域内の前記歪み主半導体層の一部を酸化させるステップを含む、請求項9に記載の方法。
- 前記第1の複数のトランジスタチャネル構造を備える複数のp型FETトランジスタを形成するステップ、及び前記第2の複数のトランジスタチャネル構造を備える複数のn型FETトランジスタを形成するステップをさらに含む、請求項1に記載の方法。
- 多層基板を含む半導体構造であって、
ベース基板、
前記ベース基板の表面上の埋め込み酸化物層、及び、
前記ベース基板とは反対側の前記埋め込み酸化物層上の主半導体層であって、前記多層基板の第1の領域内の前記主半導体層の一部が、yが0.20~0.99であるSiyGe1-yを含み、前記多層基板の第2の領域内の前記主半導体層の一部が引張り歪みSiを含む、主半導体層、
を備え、
前記主半導体層は、50nm以下の平均の層厚を有し、
前記多層基板の前記第1の領域内の前記主半導体層の前記一部が、前記多層基板の前記第2の領域内の前記主半導体層の前記一部の結晶学的な歪みと異なる結晶学的な歪みを有する、
半導体構造。 - 前記多層基板の前記第1の領域内の前記主半導体層の一部をそれぞれが備える第1の複数のp型FETトランジスタ、及び前記多層基板の前記第2の領域内の前記主半導体層の一部をそれぞれが備える第2の複数のn型FETトランジスタをさらに備える、請求項12に記載の半導体構造。
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US9219150B1 (en) | 2015-12-22 |
JP6786755B2 (ja) | 2020-11-18 |
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TW201622106A (zh) | 2016-06-16 |
DE102015217930A1 (de) | 2016-04-07 |
US9818874B2 (en) | 2017-11-14 |
TWI668840B (zh) | 2019-08-11 |
US9349865B2 (en) | 2016-05-24 |
FR3026224B1 (fr) | 2018-06-01 |
KR102465268B1 (ko) | 2022-11-10 |
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