JP2007200972A - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 229910021332 silicide Inorganic materials 0.000 claims abstract description 33
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000005669 field effect Effects 0.000 claims abstract description 24
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 15
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 229910005883 NiSi Inorganic materials 0.000 claims description 3
- VLJQDHDVZJXNQL-UHFFFAOYSA-N 4-methyl-n-(oxomethylidene)benzenesulfonamide Chemical compound CC1=CC=C(S(=O)(=O)N=C=O)C=C1 VLJQDHDVZJXNQL-UHFFFAOYSA-N 0.000 claims description 2
- 229910019001 CoSi Inorganic materials 0.000 claims description 2
- 229910008484 TiSi Inorganic materials 0.000 claims description 2
- 229910021340 platinum monosilicide Inorganic materials 0.000 claims description 2
- 229910004541 SiN Inorganic materials 0.000 claims 2
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000002184 metal Substances 0.000 description 16
- 239000010410 layer Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 238000001039 wet etching Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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Abstract
【解決手段】半導体装置はゲート電極1、ゲート絶縁膜2、サイドウォール絶縁膜3、ソース領域4、ドレイン領域5、エアギャップ6、シリサイド7、半導体8を備えている。ここで、ソース領域4とドレイン領域5上の半導体8はエアギャップ6上面よりもせり上がっている。また、半導体8上のシリサイド7はサイドウォール絶縁膜3に接近している。両者は接触していてもよい。
【選択図】図1
Description
図1は、本実施の形態における半導体装置の構成の一部を示す断面図である。ゲート電極1、ゲート絶縁膜2、サイドウォール絶縁膜3(この場合、SiO29、SiN10、SiO29の3層構造から成る)、ソース領域4、ドレイン領域5、エアギャップ6、シリサイド7、半導体8とからなる。ここで、ソース領域4とドレイン領域5上の半導体8はエアギャップ6上面よりもせり上がっている。また、半導体8上のシリサイド7はサイドウォール絶縁膜3に接近している。両者は接触していてもよい。
以下、第2の実施の形態について、図面を用いて説明する。
本実施の形態は、ソース領域とドレイン領域上の半導体材料がSiである点、半導体材料がソース領域とドレイン領域中に埋込まれていない点において、他の実施例と異なる。
2 ゲート絶縁膜
3 絶縁膜
4 ソース領域
5 ドレイン領域
6 エアギャップ
7 シリサイド
8 半導体
9 SiO2
10 SiN
11 凹部
12 SiGeエピタキシャル膜
13 Siエピタキシャル膜
20 基板
Claims (15)
- 基板上に形成された電界効果トランジスタにおいて、
前記トランジスタは、ゲート電極に隣接する絶縁膜を備え、
前記絶縁膜とソース領域および前記絶縁膜とドレイン領域との間にエアギャップを有し、
前記エアギャップ外側のソース領域とドレイン領域上の半導体がエアギャップ上面よりも上に形成され、
少なくとも前記ソース領域と前記ドレイン領域の半導体上にシリサイドが形成され、
かつ前記エアギャップ下の領域にシリサイドが形成されていないことを特徴とする半導体装置。 - 前記ソース領域と前記ドレイン領域上の半導体が、SiGeまたはSiにより形成されていることを特徴とする請求項1に記載の半導体装置。
- 前記ソース領域と前記ドレイン領域上の半導体が、前記エアギャップに隣接するソース領域とドレイン領域の凹部に埋め込まれていることを特徴とする請求項1に記載の半導体装置。
- 前記絶縁膜が、SiNまたはSiO2であることを特徴とする請求項1に記載の半導体装置。
- 前記絶縁膜がSiO2とSiNの多層構造であることを特徴とする請求項1に記載の半導体装置。
- 前記絶縁膜がSiO2、SiN、SiO2の3層構造であり、
前記SiNが断面方向からみて、L字型に形成されていることを特徴とする請求項5に記載の半導体装置。 - 前記トランジスタがpチャネル型電界効果トランジスタであることを特徴とする請求項1に記載の半導体装置。
- 基板上に形成された電界効果トランジスタを有する半導体装置の製造方法において、
ゲート電極を形成する工程と、
前記ゲート電極を覆う絶縁膜を形成する工程と、
前記絶縁膜とソース領域および前記絶縁膜とドレイン領域との間にエアギャップを形成する工程と、
前記ソース領域と前記ドレイン領域中のエアギャップに隣接した領域に選択的に半導体材料を形成し、前記エアギャップ上面よりもせり上げる工程と、
少なくとも前記ソース領域と前記ドレイン領域上にシリサイドを形成する工程と、
を含むことを特徴とする半導体装置の製造方法。 - 前記ソース領域と前記ドレイン領域上に選択的に半導体材料を形成する前に、
前記エアギャップに隣接するソース領域とドレイン領域に凹部を形成し、
前記半導体材料を前記凹部に形成すること、をさらに含むことを特徴とする請求項8に記載の半導体装置の製造方法。 - 前記ソース領域と前記ドレイン領域に選択的に形成された半導体材料がSiGeまたはSiであることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記絶縁膜がSiNまたはSiO2であることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記絶縁膜がSiO2とSiNの多層構造であることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記絶縁膜がSiO2、SiN、SiO2の3層構造であることを特徴とする請求項12に記載の半導体装置の製造方法。
- 前記シリサイドがTiSi2、PtSi、CoSi2またはNiSiであることを特徴とする請求項8に記載の半導体装置の製造方法。
- 前記トランジスタがpチャネル型電界効果トランジスタであることを特徴とする請求項9に記載の半導体装置の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006014941A JP2007200972A (ja) | 2006-01-24 | 2006-01-24 | 半導体装置およびその製造方法 |
US11/656,564 US20070181950A1 (en) | 2006-01-24 | 2007-01-23 | Semiconductor device and its manufacturing method capable of suppressing junction leakage current |
Applications Claiming Priority (1)
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Cited By (6)
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JP2009094300A (ja) * | 2007-10-09 | 2009-04-30 | Fujitsu Microelectronics Ltd | 半導体装置及びその製造方法 |
JP2009164364A (ja) * | 2008-01-08 | 2009-07-23 | Renesas Technology Corp | 半導体装置およびその製造方法 |
JP2011035217A (ja) * | 2009-08-04 | 2011-02-17 | Fujitsu Semiconductor Ltd | 半導体装置の製造方法 |
JP5168274B2 (ja) * | 2007-05-14 | 2013-03-21 | 富士通セミコンダクター株式会社 | 半導体装置の製造方法 |
JP2017512383A (ja) * | 2014-03-10 | 2017-05-18 | クアルコム,インコーポレイテッド | 中にギャップが画定されている半導体デバイス |
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US20110309416A1 (en) * | 2010-06-21 | 2011-12-22 | International Business Machines Corporation | Structure and method to reduce fringe capacitance in semiconductor devices |
CN102299154B (zh) * | 2010-06-22 | 2013-06-12 | 中国科学院微电子研究所 | 半导体结构及其制作方法 |
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JP5168274B2 (ja) * | 2007-05-14 | 2013-03-21 | 富士通セミコンダクター株式会社 | 半導体装置の製造方法 |
JP2009094300A (ja) * | 2007-10-09 | 2009-04-30 | Fujitsu Microelectronics Ltd | 半導体装置及びその製造方法 |
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JP2017512383A (ja) * | 2014-03-10 | 2017-05-18 | クアルコム,インコーポレイテッド | 中にギャップが画定されている半導体デバイス |
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CN109478534A (zh) * | 2016-08-09 | 2019-03-15 | 国际商业机器公司 | 纳米尺度的半导体器件的气隙间隔物构造 |
CN109478534B (zh) * | 2016-08-09 | 2023-10-27 | 泰塞拉公司 | 纳米尺度的半导体器件的气隙间隔物构造 |
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