JP2016526788A - リプレースメントメタルゲートトランジスタ - Google Patents
リプレースメントメタルゲートトランジスタ Download PDFInfo
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- JP2016526788A JP2016526788A JP2016521477A JP2016521477A JP2016526788A JP 2016526788 A JP2016526788 A JP 2016526788A JP 2016521477 A JP2016521477 A JP 2016521477A JP 2016521477 A JP2016521477 A JP 2016521477A JP 2016526788 A JP2016526788 A JP 2016526788A
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- layer
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- gate transistor
- metal gate
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 69
- 239000002184 metal Substances 0.000 title claims abstract description 69
- 239000000463 material Substances 0.000 claims description 71
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 claims description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052735 hafnium Inorganic materials 0.000 claims description 2
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 186
- 238000010884 ion-beam technique Methods 0.000 description 56
- 238000010586 diagram Methods 0.000 description 34
- 238000000151 deposition Methods 0.000 description 26
- 150000002500 ions Chemical class 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 22
- 230000008021 deposition Effects 0.000 description 21
- 238000000034 method Methods 0.000 description 11
- 239000000758 substrate Substances 0.000 description 8
- 238000005530 etching Methods 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- 239000003989 dielectric material Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000231 atomic layer deposition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 238000007736 thin film deposition technique Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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- Chemical & Material Sciences (AREA)
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Abstract
Description
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Claims (15)
- 底部、第1の側壁及び第2の側壁を有するトレンチと、
該トレンチ内に配置された層であって、このトレンチの前記底部上に配置された底部区分と前記第1の側壁及び前記第2の側壁上に配置された側壁区分とを有する前記層と
を具えるリプレースメントメタルゲートトランジスタにおいて、
前記層の前記側壁区分が前記層の前記底部区分よりも少なくとも50%だけ薄肉となっているリプレースメントメタルゲートトランジスタ。 - 請求項1に記載のリプレースメントメタルゲートトランジスタにおいて、前記層は第1の層であり、前記リプレースメントメタルゲートトランジスタが更に、前記トレンチ内に配置された第2の層を具えており、該第2の層は、前記第1の層の前記底部区分上に配置された底部区分と前記第1の層の前記側壁区分上に配置された側壁区分とを有しているリプレースメントメタルゲートトランジスタ。
- 請求項2に記載のリプレースメントメタルゲートトランジスタにおいて、前記第2の層は前記第1の層の下側に配置されているリプレースメントメタルゲートトランジスタ。
- 請求項3に記載のリプレースメントメタルゲートトランジスタにおいて、前記第2の層は、ケイ酸ハフニウム、ケイ酸ジルコニウム、二酸化ハフニウム及び二酸化ジルコニウムの群から選択した材料から形成されているリプレースメントメタルゲートトランジスタ。
- 請求項3に記載のリプレースメントメタルゲートトランジスタにおいて、前記リプレースメントメタルゲートトランジスタが更に、前記トレンチ内に配置された接点層を具えているリプレースメントメタルゲートトランジスタ。
- 請求項1に記載のリプレースメントメタルゲートトランジスタにおいて、前記層の前記底部区分の厚さが少なくとも2ナノメートルであり、前記層の前記側壁区分の厚さが1ナノメートル以下であるリプレースメントメタルゲートトランジスタ。
- 請求項1に記載のリプレースメントメタルゲートトランジスタにおいて、前記層が窒化チタンを含む材料から形成されているリプレースメントメタルゲートトランジスタ。
- 底部、第1の側壁及び第2の側壁を有するトレンチと、
該トレンチ内に配置された誘電体層であって、前記トレンチの前記底部上に配置された底部区分と前記第1の側壁及び前記第2の側壁上に配置された側壁区分とを有する前記誘電体層と、
前記トレンチ内に配置された金属層であって、前記誘電体層の前記底部区分上に配置された底部区分及び前記誘電体層の前記側壁区分上に配置された側壁区分を有する前記金属層と
を具えるリプレースメントメタルゲートトランジスタにおいて、
前記金属層の前記側壁区分が部分的に前記第1の側壁及び前記第2の側壁の上方に延在し、前記誘電体層の前記側壁区分の少なくとも一部分が前記金属層により被覆されないようになっているリプレースメントメタルゲートトランジスタ。 - 請求項8に記載のリプレースメントメタルゲートトランジスタにおいて、前記金属層が第1の金属層であり、前記リプレースメントメタルゲートトランジスタが更に、前記トレンチ内に配置された第2の金属層を具えており、該第2の金属層は前記第1の金属層の前記底部区分上に配置された底部区分と前記第1の金属層の前記側壁区分上に配置された側壁区分とを有しており、前記第2の金属層の前記側壁区分が部分的に前記第1の側壁及び前記第2の側壁の上方に延在し、前記誘電体層の前記側壁区分の少なくとも一部分が前記第1の金属層又は前記第2の金属層により被覆されないようになっているリプレースメントメタルゲートトランジスタ。
- 請求項9に記載のリプレースメントメタルゲートトランジスタにおいて、該リプレースメントメタルゲートトランジスタが更に、前記トレンチ内に配置された接点層を具えているリプレースメントメタルゲートトランジスタ。
- 請求項10に記載のリプレースメントメタルゲートトランジスタにおいて、前記接点層が前記第2の金属層の前記底部区分と、部分的に前記第1の側壁及び前記第2の側壁の上方に延在する前記第2の金属層の前記側壁区分と、前記第2の金属層により被覆されていない前記誘電体層の前記側壁区分との上に配置されているリプレースメントメタルゲートトランジスタ。
- 請求項8に記載のリプレースメントメタルゲートトランジスタにおいて、前記金属層の前記側壁区分は前記金属層の前記底部区分よりも少なくとも50%だけ薄肉となっているリプレースメントメタルゲートトランジスタ。
- 請求項12に記載のリプレースメントメタルゲートトランジスタにおいて、前記金属層の前記底部区分の厚さは少なくとも2ナノメートルであり、前記金属層の前記側壁区分の厚さは1ナノメートル以下であるリプレースメントメタルゲートトランジスタ。
- 請求項9に記載のリプレースメントメタルゲートトランジスタにおいて、前記第2の金属層の前記側壁区分は前記第2の金属層の前記底部区分よりも少なくとも50%だけ薄肉となっているリプレースメントメタルゲートトランジスタ。
- 請求項14に記載のリプレースメントメタルゲートトランジスタにおいて、前記第2の金属層の前記底部区分の厚さは少なくとも2ナノメートルであり、前記第2の金属層の前記側壁区分の厚さは1ナノメートル以下であるリプレースメントメタルゲートトランジスタ。
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