JP2013514663A - デュアル仕事関数ゲート構造 - Google Patents
デュアル仕事関数ゲート構造 Download PDFInfo
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- 230000009977 dual effect Effects 0.000 title description 11
- 239000000463 material Substances 0.000 claims abstract description 111
- 239000004065 semiconductor Substances 0.000 claims abstract description 29
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 230000006870 function Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 17
- 229920002120 photoresistant polymer Polymers 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 5
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000000059 patterning Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 15
- 230000005684 electric field Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 5
- 239000007769 metal material Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910026551 ZrC Inorganic materials 0.000 description 1
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 description 1
- CAVCGVPGBKGDTG-UHFFFAOYSA-N alumanylidynemethyl(alumanylidynemethylalumanylidenemethylidene)alumane Chemical compound [Al]#C[Al]=C=[Al]C#[Al] CAVCGVPGBKGDTG-UHFFFAOYSA-N 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
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- WHJFNYXPKGDKBB-UHFFFAOYSA-N hafnium;methane Chemical compound C.[Hf] WHJFNYXPKGDKBB-UHFFFAOYSA-N 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910003468 tantalcarbide Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 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 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
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
Description
図7Cにおいて観察されるように、フォトレジスト703a,bは、ウエハ上にコーティングされ、かつ、n型デバイスのゲート端部にわたって一対の開口部704を形成し、かつ、p型デバイスのゲート中心部にわたって1つの開口部705を形成するようにパターニングされる。開口部の各々は、下地のn型ゲート材料702a,bを曝露する。曝露されたn型ゲート材料は続いてエッチングされる。エッチングは、ドライエッチング−たとえばHCl又はSF6を基本とするエッチング−により行われてよい。
Claims (20)
- トランジスタを有する半導体チップであって、
前記トランジスタは、ゲート誘電体にわたって設けられるゲート電極を有し、
前記ゲート電極は、前記ゲート誘電体上に設けられる第1ゲート材料、及び、前記ゲート誘電体上に設けられる第2ゲート材料を有し、
前記第1ゲート材料は前記第2ゲート材料とは異なり、かつ、
前記第2ゲート材料は、前記ゲート電極のソース領域又はドレイン領域のいずれか一に設けられる、
半導体チップ。 - 前記トランジスタがn型デバイスで、かつ、
前記第1ゲート材料は、前記第2ゲート材料よりも小さな仕事関数を有する、
請求項1に記載の半導体チップ。 - 前記第1ゲート材料及び前記第2ゲート材料が、前記ゲート誘電体上で互いに横方向に隣接する、請求項1に記載の半導体チップ。
- 第2トランジスタを有する請求項3に記載の半導体チップであって、
前記第2トランジスタがp型デバイスで、
前記第2トランジスタは、前記p型デバイスのゲート誘電体上に設けられた前記第2ゲート材料を含むゲート電極を有する、
半導体チップ。 - 前記ゲート電極が、前記ゲート誘電体上に設けられた第3ゲート材料を有し、かつ、
前記第3ゲート材料は、前記ソース領域又は前記ドレイン領域のいずれか他に設けられる、
請求項2に記載の半導体チップ。 - 前記第3ゲート材料が前記第2ゲート材料と同一である、請求項5に記載の半導体チップ。
- 前記トランジスタがp型デバイスで、かつ、
前記第1ゲート材料は、前記第2ゲート材料よりも小さな仕事関数を有する、
請求項1に記載の半導体チップ。 - 前記第2ゲート材料が金属で構成される、請求項1に記載の半導体チップ。
- 第2トランジスタを有する請求項8に記載の半導体チップであって、
前記第2トランジスタがn型デバイスで、
前記第2トランジスタは、前記n型デバイスのゲート誘電体上に設けられた前記第2ゲート材料を含むゲート電極を有する、
半導体チップ。 - トランジスタのゲート電極を形成する工程を有する方法であって、
前記トランジスタは、
ゲート誘電体の第1領域上に第1ゲート材料を堆積する工程、及び、
前記ゲート誘電体の第2領域上に第2ゲート材料を堆積する工程、
によって形成され、
前記第2ゲート材料は、前記ゲート電極のソース側又はドレイン側に存在し、
前記第1ゲート材料と前記第2ゲート材料は、それぞれ異なる仕事関数を有する、
方法。 - 前記第1ゲート材料を堆積する工程後であって、前記第2ゲート材料を堆積する工程前に:
前記第1ゲート材料をフォトレジストでコーティングする工程;
前記フォトレジストをパターニングすることで、前記フォトレジストの一部を除去して、前記第1ゲート材料の領域を曝露する工程;及び、
前記第1ゲート材料の領域をエッチングすることで、前記ゲート誘電体の第2領域を曝露する工程であって、前記第1ゲート材料と前記第2ゲート材料は、前記ゲート誘電体上で互いに横方向に隣接する、工程;
をさらに有する請求項10に記載の方法。 - 前記トランジスタがn型トランジスタで、かつ、
前記第1ゲート材料は、前記第2ゲート材料よりも小さな仕事関数を有する、
請求項10に記載の方法。 - 前記トランジスタがp型トランジスタで、かつ、
前記第1ゲート材料は、前記第2ゲート材料よりも大きな仕事関数を有する、
請求項10に記載の方法。 - 同一の半導体ダイ上に第2トランジスタの第2ゲート電極を形成する工程をさらに有する請求項10に記載の方法であって、前記ゲート電極は:
前記第2トランジスタのゲート誘電体の第1領域上に前記第2ゲート材料を堆積する工程;
前記第2トランジスタのゲート誘電体の第2領域上に前記第1ゲート材料を堆積する工程;
によって形成され、
前記第2トランジスタのゲート誘電体の第2領域上の第1ゲート材料は、前記第2ゲート電極のソース側又はドレイン側に存在する、
方法。 - n型トランジスタとp型トランジスタを有する半導体ダイであって、
前記n型トランジスタは、ゲート誘電体にわたって設けられるゲート電極を有し、
前記ゲート電極は、前記ゲート誘電体上に設けられる第1ゲート材料、及び、前記ゲート誘電体上に設けられる第2ゲート材料を有し、かつ、
前記第1ゲート材料は、前記第2ゲート材料よりも小さな仕事関数を有し、
前記第2ゲート材料は、前記ゲート電極のソース領域又はドレイン領域のいずれか一に設けられ、
前記p型トランジスタは、ゲート誘電体にわたって設けられるゲート電極を有し、
前記p型トランジスタのゲート電極は、前記p型トランジスタのゲート誘電体上に設けられる前記第1ゲート材料、及び、前記p型トランジスタのゲート誘電体上に設けられる前記第2ゲート材料を有し、かつ、
前記p型トランジスタの第1ゲート材料は、前記p型トランジスタのゲート電極のソース領域又はドレイン領域のいずれかに設けられる、
半導体ダイ。 - 前記n型トランジスタと前記p型トランジスタは非対称トランジスタである、請求項15に記載の半導体ダイ。
- 前記n型トランジスタが垂直ドレイン型トランジスタである、請求項15に記載の半導体ダイ。
- 前記n型トランジスタが横方向拡散トランジスタである、請求項15に記載の半導体ダイ。
- 前記n型トランジスタと前記p型トランジスタがアナログ回路又は混成信号回路で、かつ、
前記半導体ダイは論理回路をも有する、
請求項15に記載の半導体ダイ。 - 前記第1ゲート材料と前記第2ゲート材料が、各対応するトランジスタのゲート誘電体上で互いに横方向に隣接する、請求項15に記載の半導体ダイ。
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PCT/US2010/058661 WO2011087604A2 (en) | 2009-12-23 | 2010-12-02 | Dual work function gate structures |
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CN102714207B (zh) | 2016-03-09 |
JP5596172B2 (ja) | 2014-09-24 |
WO2011087604A2 (en) | 2011-07-21 |
WO2011087604A3 (en) | 2011-11-17 |
US20110147837A1 (en) | 2011-06-23 |
KR20120088002A (ko) | 2012-08-07 |
TW201133781A (en) | 2011-10-01 |
CN102714207A (zh) | 2012-10-03 |
KR101447430B1 (ko) | 2014-10-13 |
TWI521672B (zh) | 2016-02-11 |
EP2517244A4 (en) | 2014-05-07 |
EP2517244A2 (en) | 2012-10-31 |
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