JP7011190B2 - 垂直輸送フィン電界効果トランジスタおよび垂直輸送フィン電界効果トランジスタの形成方法 - Google Patents
垂直輸送フィン電界効果トランジスタおよび垂直輸送フィン電界効果トランジスタの形成方法 Download PDFInfo
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 31
- 230000015572 biosynthetic process Effects 0.000 claims description 9
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- 230000008569 process Effects 0.000 description 19
- 238000000231 atomic layer deposition Methods 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 17
- 239000010703 silicon Substances 0.000 description 17
- 238000001020 plasma etching Methods 0.000 description 16
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- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 4
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 3
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- 229910052582 BN Inorganic materials 0.000 description 2
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- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 2
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- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
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- 238000007654 immersion Methods 0.000 description 1
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- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
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- 150000001247 metal acetylides Chemical class 0.000 description 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
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- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical class [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
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- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 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
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0642—Isolation within the component, i.e. internal isolation
- H01L29/0649—Dielectric regions, e.g. SiO2 regions, air gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66553—Unipolar field-effect transistors with an insulated gate, i.e. MISFET using inside spacers, permanent or not
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4966—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET the conductor material next to the insulator being a composite material, e.g. organic material, TiN, MoSi2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66666—Vertical transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7827—Vertical transistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78642—Vertical transistors
Description
Claims (19)
- 垂直輸送フィン電界効果トランジスタ(VT FinFET)であって、
基板の表面上の1つまたは複数の垂直フィンと、
前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンに隣接する前記基板上のL字形またはU字形のスペーサ溝であって、前記スペーサ溝の側壁が、前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの側壁上にある、前記スペーサ溝と、
前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの前記側壁上に且つ前記L字形またはU字形のスペーサ溝の内側側壁及び溝上に直接的に接するゲート誘電体層と
を備える、前記垂直輸送フィン電界効果トランジスタ。 - 前記L字形またはU字形のスペーサ溝の材料が窒化ケイ素(SiN)である、請求項1に記載の垂直輸送フィン電界効果トランジスタ。
- 前記L字形またはU字形のスペーサ溝と前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンとの間のライナを更に備える、請求項1または2に記載の垂直輸送フィン電界効果トランジスタ。
- 前記ライナの材料が酸化ケイ素(SiO)である、請求項3に記載の垂直輸送フィン電界効果トランジスタ。
- 前記L字形またはU字形のスペーサ溝が、1nm~5nmの範囲の溝面上方の高さを持つ内側側壁を有する、請求項1~4のいずれか1項に記載の垂直輸送フィン電界効果トランジスタ。
- 前記ライナがL字形またはU字形である、請求項3若しくは4に記載の、又は請求項3若しくは4に従属する場合の請求項5に記載の垂直輸送フィン電界効果トランジスタ。
- 前記ゲート誘電体層上の仕事関数層、および前記仕事関数層上のゲート・フィル層を更に備えてゲート構造を形成する、請求項1~6のいずれか1項に記載の垂直輸送フィン電界効果トランジスタ。
- 前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの上面上の上部ソース/ドレイン、および前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの下方の下部ソース/ドレインを更に備える、請求項1~7のいずれか1項に記載の垂直輸送フィン電界効果トランジスタ。
- 垂直輸送フィン電界効果トランジスタを形成する方法であって、
基板上に1つまたは複数の垂直フィンを形成すること、
前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの基部に拡張領域を形成すること、
前記基板および前記1つまたは複数の垂直フィンの露出面上にスペーサ層を形成すること、
前記スペーサ層上にゲージ層を形成すること、
前記ゲージ層の一部分を除去して前記スペーサ層上に1つまたは複数のゲージ部を形成することであって、前記ゲージ層の前記一部分を除去することによって前記1つまたは複数の垂直フィン上の前記スペーサ層の一部分が露出される、前記形成すること、及び
前記スペーサ層の前記露出された一部分を除去してL字形またはU字形のスペーサ溝を形成すること、
を含む、前記方法。 - 垂直輸送フィン電界効果トランジスタを形成する方法であって、
基板上に1つまたは複数の垂直フィンを形成すること、
前記基板および前記1つまたは複数の垂直フィンの露出面上にスペーサ層を形成すること、
前記スペーサ層上にゲージ層を形成すること、
前記ゲージ層の一部分を除去して前記スペーサ層上に1つまたは複数のゲージ部を形成することであって、前記ゲージ層の前記一部分を除去することによって前記1つまたは複数の垂直フィン上の前記スペーサ層の一部分が露出される、前記形成すること、
前記スペーサ層の前記露出された一部分を除去してL字形またはU字形のスペーサ溝を形成すること、
前記基板と前記スペーサ層との間におよび前記1つまたは複数の垂直フィンと前記スペーサ層との間にライナ層を形成すること、及び
前記スペーサ層の前記露出された一部分を除去することによって露出される前記1つまたは複数の垂直フィン上の前記ライナ層の一部分を除去すること
を含む、前記方法。 - 前記1つまたは複数のゲージ部を除去して前記L字形またはU字形のスペーサ溝の内側側壁を露出させることであって、前記内側側壁が1nm~5nmの範囲の溝面上方の高さを有する、前記露出させること
を更に含む、請求項9または10に記載の方法。 - 前記1つまたは複数の垂直フィンの前記露出面上および前記L字形またはU字形のスペーサ溝の内側側壁上にゲート誘電体層を形成することを更に含む、請求項11に記載の方法。
- 前記L字形またはU字形のスペーサ溝の材料が窒化ケイ素(SiN)である、請求項9~12のいずれか1項に記載の方法。
- 前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの上面上に上部ソース/ドレインを、および前記1つまたは複数の垂直フィンのうちの少なくとも1つの垂直フィンの下方に下部ソース/ドレインを形成すること
を更に含む、請求項9~13のいずれか1項に記載の方法。 - 垂直輸送フィン電界効果トランジスタを形成する方法であって、
基板上に1つまたは複数の垂直フィンを形成すること、
前記基板および前記1つまたは複数の垂直フィンの露出面上にライナ層を形成すること、
前記ライナ層の少なくとも一部分上にスペーサ層を形成すること、
前記スペーサ層上にゲージ層を形成すること、
前記ゲージ層の一部分を除去して前記スペーサ層上に1つまたは複数のゲージ部を形成することであって、前記ゲージ層の前記一部分を除去することによって前記1つまたは複数の垂直フィン上の前記スペーサ層の一部分が露出される、前記形成すること、
前記スペーサ層の前記露出された一部分を除去することであって、前記スペーサ層の前記露出された一部分を除去することが、下位のライナ層の一部分を露出させる、前記除去すること、
前記1つまたは複数の垂直フィン上の前記下位のライナ層の前記露出された一部分を除去すること
を含む、前記方法。 - 前記スペーサ層の前記露出された一部分を除去することがL字形またはU字形のスペーサ溝を形成する、請求項15に記載の方法。
- 前記下位のライナ層の前記露出された一部分を除去することがL字形またはU字形のライナを形成する、請求項15又は16に記載の方法。
- 前記L字形またはU字形のスペーサ溝および前記1つまたは複数の垂直フィンの前記露出面上にゲート誘電体を形成することを更に含む、請求項16または17に記載の方法。
- 前記スペーサ層が3nm~8nmの範囲の厚さを有する、請求項15~18のいずれか1項に記載の方法。
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