JP7205912B2 - Nfet及びpfetナノワイヤデバイスを製造する方法 - Google Patents
Nfet及びpfetナノワイヤデバイスを製造する方法 Download PDFInfo
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- JP7205912B2 JP7205912B2 JP2019558614A JP2019558614A JP7205912B2 JP 7205912 B2 JP7205912 B2 JP 7205912B2 JP 2019558614 A JP2019558614 A JP 2019558614A JP 2019558614 A JP2019558614 A JP 2019558614A JP 7205912 B2 JP7205912 B2 JP 7205912B2
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Description
Claims (18)
- 基板上にナノワイヤトランジスタを形成する方法であって、
Si層、SiGe層、及び前記Si層と前記SiGe層との間に位置するGe層、を含む膜スタックを用意し、
前記Si層及び前記SiGe層に対して選択的なエッチングによって前記Ge層を選択的に除去し、それにより、前記Si層と前記SiGe層との間に隙間を形成し、
前記Si層及び前記SiGe層を封入する誘電体層を堆積させ、
前記Si層と前記SiGe層との間の前記隙間を完全に充填する金属含有ゲート電極層を堆積させる、
ことを有する方法。 - 前記選択的に除去することは、熱支援又はプラズマ支援ハロゲン系気相エッチングを含む、請求項1に記載の方法。
- 前記プラズマ支援ハロゲン系気相エッチングはリモートプラズマ源を使用する、請求項2に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、塩素含有ガス、フッ素含有ガス、塩素含有ガスとフッ素含有ガス、又は塩素及びフッ素含有ガスを含む、請求項2に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、Cl2、F2、ClF3、又はこれらの組み合わせを含む、請求項2に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、F2及びNH3を含む、請求項2に記載の方法。
- 基板上にナノワイヤトランジスタを形成する方法であって、
Si層、SiGe層、及び前記Si層と前記SiGe層との間に位置するGe層、を含む膜スタックを用意し、
前記Si層及び前記SiGe層に対して選択的なエッチングによって前記Ge層を選択的に除去し、それにより、前記Si層と前記SiGe層との間に隙間を形成する、
ことを有し、
前記Si層は、n型電界効果トランジスタ(NFET)の一部を形成し、前記SiGe層は、p型電界効果トランジスタ(PFET)の一部を形成し、前記Si層及び前記SiGe層は、一方が他方の上にと、上下に積層される、
方法。 - 前記選択的に除去することは、熱支援又はプラズマ支援ハロゲン系気相エッチングを含む、請求項7に記載の方法。
- n型電界効果トランジスタ(NFET)を形成する方法であって、
交互のSi層及びGe層を含む基板を用意し、
前記Si層に対して選択的なエッチングによって前記Ge層を選択的に除去し、それにより、前記Si層同士の間に隙間を形成し、
前記Si層を封入する誘電体層を堆積させ、
前記Si層同士の間の前記隙間を完全に充填する金属含有ゲート電極層を堆積させる、
ことを有し、
前記選択的に除去することは、熱支援又はプラズマ支援ハロゲン系気相エッチングを含む、
方法。 - 前記プラズマ支援ハロゲン系気相エッチングはリモートプラズマ源を使用する、請求項9に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、塩素含有ガス、フッ素含有ガス、塩素含有ガスとフッ素含有ガス、又は塩素及びフッ素含有ガスを含む、請求項9に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、Cl2、F2、ClF3、又はこれらの組み合わせを含む、請求項9に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、F2及びNH3を含む、請求項9に記載の方法。
- p型電界効果トランジスタ(PFET)を形成する方法であって、
複数の交互のSiGe層及びGe層を含む基板を用意し、
前記SiGe層に対して選択的なエッチングによって前記複数のGe層を選択的に除去し、それにより、前記SiGe層同士の間に隙間を形成し、
前記SiGe層を封入する誘電体層を堆積させ、
前記SiGe層同士の間の前記隙間を完全に充填する金属含有ゲート電極層を堆積させる、
ことを有し、
前記選択的に除去することは、熱支援又はプラズマ支援ハロゲン系気相エッチングを含む、
方法。 - 前記プラズマ支援ハロゲン系気相エッチングはリモートプラズマ源を使用する、請求項14に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、塩素含有ガス、フッ素含有ガス、塩素含有ガスとフッ素含有ガス、又は塩素及びフッ素含有ガスを含む、請求項14に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、Cl2、F2、ClF3、又はこれらの組み合わせを含む、請求項14に記載の方法。
- 前記熱支援又はプラズマ支援ハロゲン系気相エッチングは、F2及びNH3を含む、請求項14に記載の方法。
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US11664420B2 (en) | 2019-12-26 | 2023-05-30 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device and method |
US20210257462A1 (en) * | 2020-02-19 | 2021-08-19 | Taiwan Semiconductor Manufacturing Co., Ltd. | Silicon-Germanium Fins and Methods of Processing the Same in Field-Effect Transistors |
US11581415B2 (en) * | 2020-04-24 | 2023-02-14 | Taiwan Semiconductor Manufacturing Co., Ltd. | Multi-layer channel structures and methods of fabricating the same in field-effect transistors |
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