JP5456090B2 - 半導体装置およびその製造方法 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 239000012535 impurity Substances 0.000 claims description 93
- 239000000758 substrate Substances 0.000 claims description 93
- 238000005468 ion implantation Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000000059 patterning Methods 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 100
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- 238000000034 method Methods 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 12
- 229910052710 silicon Inorganic materials 0.000 description 12
- 239000010703 silicon Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 229910052814 silicon oxide Inorganic materials 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 8
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 8
- 229910021332 silicide Inorganic materials 0.000 description 8
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 7
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 6
- 229910052796 boron Inorganic materials 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
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- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
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- 229910052731 fluorine Inorganic materials 0.000 description 2
- -1 metal silicide Chemical class 0.000 description 2
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 2
- 229910021334 nickel silicide Inorganic materials 0.000 description 2
- RUFLMLWJRZAWLJ-UHFFFAOYSA-N nickel silicide Chemical compound [Ni]=[Si]=[Ni] RUFLMLWJRZAWLJ-UHFFFAOYSA-N 0.000 description 2
- 229910021339 platinum silicide Inorganic materials 0.000 description 2
- 238000004151 rapid thermal annealing Methods 0.000 description 2
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 2
- 229910003468 tantalcarbide Inorganic materials 0.000 description 2
- ZXEYZECDXFPJRJ-UHFFFAOYSA-N $l^{3}-silane;platinum Chemical compound [SiH3].[Pt] ZXEYZECDXFPJRJ-UHFFFAOYSA-N 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
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- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- PCLURTMBFDTLSK-UHFFFAOYSA-N nickel platinum Chemical compound [Ni].[Pt] PCLURTMBFDTLSK-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 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
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- 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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- Insulated Gate Type Field-Effect Transistor (AREA)
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Description
本実施の形態の半導体装置は、半導体基板と、半導体基板上に形成される埋め込み絶縁層と、埋め込み絶縁層上に形成され、狭窄部、狭窄部より幅が広く狭窄部の一端および他端にそれぞれ接続される2つの幅広部、を有する半導体層と、少なくとも狭窄部の側面に形成されるゲート絶縁膜と、ゲート絶縁膜上のゲート電極と、を備える。そして、狭窄部下の半導体基板の不純物濃度が、狭窄部の不純物濃度より高い。また、狭窄部下の半導体基板の不純物濃度が、幅広部下の半導体基板の不純物濃度より高い。
本実施の形態の半導体装置は、半導体基板の高濃度領域と低濃度領域の境界が、幅広部の端部の直下の位置にあること以外は、第1の実施の形態と同様である。したがって、第1の実施の形態と重複する内容については記述を省略する。
本実施の形態の半導体装置は、狭窄部が複数存在すること以外は、第1の実施の形態と同様である。したがって、第1の実施の形態と重複する内容については記述を省略する。
本実施の形態の半導体装置は、半導体装置が、狭窄部の側面上のみにゲート絶縁膜が形成されるフィン型トランジスタであること以外は、第1の実施の形態と同様である。したがって、第1の実施の形態と重複する内容については記述を省略する。
10a 高濃度領域
10b 低濃度領域
12 埋め込み絶縁層
14 半導体層
16 狭窄部
18a 幅広部
18b 幅広部
20 チャネル領域
22 ソース・ドレイン領域
24 ゲート絶縁膜
26 ゲート電極
28 ゲート側壁
30 マスク層
50 基板
Claims (6)
- 半導体基板と、
前記半導体基板上に形成される埋め込み絶縁層と、
前記埋め込み絶縁層上に形成され、狭窄部、前記狭窄部より幅が広く前記狭窄部の一端および他端にそれぞれ接続される2つの幅広部、を有する半導体層と、
前記狭窄部の側面に形成されるゲート絶縁膜と、
前記ゲート絶縁膜上のゲート電極と、を備え、
前記狭窄部下の前記半導体基板および前記幅広部下の前記半導体基板が第1導電型であり、
前記狭窄部下の前記半導体基板の第1導電型の不純物濃度が前記狭窄部の第1導電型の不純物濃度より高く、
前記狭窄部下の前記半導体基板の第1導電型の不純物濃度が前記幅広部下の前記半導体基板の第1導電型の不純物濃度より高いことを特徴とする半導体装置。 - 前記狭窄部下の前記半導体基板の不純物濃度が1E18cm−3以上1E21cm−3以下であることを特徴とする請求項1記載の半導体装置。
- 前記埋め込み絶縁層の膜厚が3nm以上25nm以下であることを特徴とする請求項1または請求項2記載の半導体装置。
- 半導体基板、前記半導体基板上の埋め込み絶縁層、前記埋め込み絶縁層上の半導体層、を有する基板を準備し、
前記半導体層上にマスク層を形成し、
前記マスク層をパターニングし、
パターニングされた前記マスク層をマスクに、狭窄部、前記狭窄部より幅が広く前記狭窄部の一端および他端にそれぞれ接続される2つの幅広部、を有するよう前記半導体層を、パターニングし、
前記マスク層をマスクに前記半導体基板中に不純物をイオン注入し、
前記不純物のイオン注入後に、熱処理を行って前記不純物を拡散させ、前記狭窄部下の前記半導体基板の不純物濃度を、前記幅広部下の前記半導体基板の不純物濃度よりも高くし、
前記不純物のイオン注入後に前記狭窄部上にゲート絶縁膜を形成し、
前記ゲート絶縁膜上にゲート電極を形成することを特徴とする半導体装置の製造方法。 - 前記不純物のイオン注入により、前記マスク層のパターニング後に前記マスク層がない領域の前記半導体基板の不純物濃度を、前記狭窄部の不純物濃度より高くすることを特徴とする請求項4記載の半導体装置の製造方法。
- 前記不純物のイオン注入が、前記半導体基板に対し略垂直に行われることを特徴とする請求項4または請求項5記載の半導体装置の製造方法。
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JP2012056326A JP5456090B2 (ja) | 2012-03-13 | 2012-03-13 | 半導体装置およびその製造方法 |
US13/729,959 US8907406B2 (en) | 2012-03-13 | 2012-12-28 | Transistor having impurity distribution controlled substrate and method of manufacturing the same |
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JP2013191698A JP2013191698A (ja) | 2013-09-26 |
JP5456090B2 true JP5456090B2 (ja) | 2014-03-26 |
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US9098666B2 (en) | 2012-11-28 | 2015-08-04 | Qualcomm Incorporated | Clock distribution network for 3D integrated circuit |
US9536840B2 (en) | 2013-02-12 | 2017-01-03 | Qualcomm Incorporated | Three-dimensional (3-D) integrated circuits (3DICS) with graphene shield, and related components and methods |
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