JP2011066152A - 半導体装置およびその製造方法 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 77
- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 230000001590 oxidative effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract 2
- 239000002070 nanowire Substances 0.000 description 47
- 229910004298 SiO 2 Inorganic materials 0.000 description 13
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 12
- 230000003071 parasitic effect Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
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- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000001020 plasma etching Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- JOHWNGGYGAVMGU-UHFFFAOYSA-N trifluorochlorine Chemical compound FCl(F)F JOHWNGGYGAVMGU-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Abstract
【解決手段】半導体装置は、半導体基板10と、前記半導体基板上のソース/ドレイン領域に形成された第1半導体層11と、前記第1半導体層上に形成された第1部分12aと、前記ソース/ドレイン領域の間に位置するチャネル領域に線状に形成された第2部分12bと、を有する第2半導体層12と、前記第2半導体層の前記第2部分の周囲に絶縁膜17を介して形成されたゲート電極18と、を具備し、前記第2半導体層の前記第2部分の膜厚は、前記第2半導体層の前記第1部分の膜厚より小さい。
【選択図】 図2
Description
まず、本発明の実施形態に係るGAAトランジスタの構造について説明する。図1は、GAAトランジスタの斜視図を示している。
次に、本発明の実施形態に係るGAAトランジスタの製造方法について説明する。図5および図6は、GAAトランジスタの製造工程の斜視図を示している。
本実施形態によれば、チャネル領域におけるSi膜12(Siナノワイヤー12b)の膜厚は、ソース/ドレイン領域S/DにおけるSi膜12(Si膜12a)の膜厚より小さい。すなわち、微細化されたSiナノワイヤー12bに対して、Si膜12aの膜厚はある程度の大きさを保っている。このように、Siナノワイヤー12bの膜厚を小さくすることにより、電界が集中しやすくバリスティック伝導になる。これにより、駆動電流を増大することができ、Si膜12のチャネルとしての機能を向上することができる。一方、微細化されたSiナノワイヤー12bに対して、Si膜12aの膜厚を大きくすることにより、ソース/ドレイン領域S/D(拡散層部分)の抵抗を小さくし、寄生抵抗を低減できる。すなわち、本実施形態では、チャネルのバリスティック伝導を向上させるとともに、ソース/ドレインの寄生抵抗を低減することができる。
Claims (5)
- 半導体基板と、
前記半導体基板上のソース/ドレイン領域に形成された第1半導体層と、
前記第1半導体層上に形成された第1部分と、前記ソース/ドレイン領域の間に位置するチャネル領域に線状に形成された第2部分とを有する第2半導体層と、
前記第2半導体層の前記第2部分の周囲に絶縁膜を介して形成されたゲート電極と、
を具備し、
前記第2半導体層の前記第2部分の膜厚は、前記第2半導体層の前記第1部分の膜厚より小さい
ことを特徴とする半導体装置。 - 前記第2半導体層の前記第2部分は円柱状に形成され、前記第2半導体層の前記第2部分の径は前記第2半導体層の前記第1部分の膜厚より小さいことを特徴とする請求項1に記載の半導体装置。
- 前記第2半導体層の前記第2部分の径は数nmであり、前記第2半導体層の前記第1部分の膜厚は10nmから100nmであることを特徴とする請求項2に記載の半導体装置。
- 半導体基板上に、第1半導体層を形成し、
前記第1半導体層上に、第2半導体層を形成し、
前記第2半導体層を加工して、前記第1および第2半導体層によるソース/ドレイン領域と、前記第1および第2半導体層による前記ソース/ドレイン領域の間に位置するチャネル形成領域と、を形成し、
前記チャネル形成領域の前記第1半導体層を除去して、前記第2半導体層による線状のチャネル領域と、を形成し、
前記チャネル領域の前記第2半導体層の表面を酸化し、
前記チャネル領域の酸化された前記第2半導体層の表面を除去して、前記チャネル領域の前記第2半導体層の膜厚を前記ソース/ドレイン領域の前記第2半導体層の膜厚より小さくし、
前記チャネル領域の前記第2半導体層の周囲に、絶縁膜を介して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。 - 前記チャネル領域の前記第2半導体層の表面を酸化する前に、
前記ソース/ドレイン領域の前記第2半導体層上に、酸化膜を形成し、
前記ソース/ドレイン領域の前記第2半導体層の側面に、窒化膜を形成する、
ことを特徴とする請求項4に記載の半導体装置の製造方法。
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JP2009214809A JP4991814B2 (ja) | 2009-09-16 | 2009-09-16 | 半導体装置およびその製造方法 |
US12/700,502 US8314464B2 (en) | 2009-09-16 | 2010-02-04 | Semiconductor device and manufacturing method thereof |
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JP2011066152A true JP2011066152A (ja) | 2011-03-31 |
JP4991814B2 JP4991814B2 (ja) | 2012-08-01 |
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CN103117266B (zh) * | 2011-11-17 | 2015-08-05 | 中芯国际集成电路制造(上海)有限公司 | 导电插塞及形成方法 |
US8987071B2 (en) * | 2011-12-21 | 2015-03-24 | National Applied Research Laboratories | Thin film transistor and fabricating method |
CN104137228A (zh) | 2011-12-23 | 2014-11-05 | 英特尔公司 | 具有环绕式接触部的纳米线结构 |
US9006829B2 (en) * | 2012-08-24 | 2015-04-14 | Taiwan Semiconductor Manufacturing Company, Ltd. | Aligned gate-all-around structure |
US8823059B2 (en) * | 2012-09-27 | 2014-09-02 | Intel Corporation | Non-planar semiconductor device having group III-V material active region with multi-dielectric gate stack |
US9184269B2 (en) * | 2013-08-20 | 2015-11-10 | Taiwan Semiconductor Manufacturing Company Limited | Silicon and silicon germanium nanowire formation |
US11404325B2 (en) | 2013-08-20 | 2022-08-02 | Taiwan Semiconductor Manufacturing Co., Ltd. | Silicon and silicon germanium nanowire formation |
CN104517847B (zh) * | 2013-09-29 | 2017-07-14 | 中芯国际集成电路制造(上海)有限公司 | 无结晶体管及其形成方法 |
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KR20170135115A (ko) * | 2016-05-30 | 2017-12-08 | 삼성전자주식회사 | 반도체 장치 및 그 제조 방법 |
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CN110729189B (zh) * | 2018-07-17 | 2023-06-30 | 中芯国际集成电路制造(天津)有限公司 | 半导体器件及其制造方法 |
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JP2016508669A (ja) * | 2013-01-24 | 2016-03-22 | インテル・コーポレーション | ゲルマニウム活性層またはiii−v族活性層を有する深いゲートオールアラウンド半導体デバイス |
US10026845B2 (en) | 2013-01-24 | 2018-07-17 | Intel Corporation | Deep gate-all-around semiconductor device having germanium or group III-V active layer |
US10950733B2 (en) | 2013-01-24 | 2021-03-16 | Google Llc | Deep gate-all-around semiconductor device having germanium or group III-V active layer |
US11894465B2 (en) | 2013-01-24 | 2024-02-06 | Google Llc | Deep gate-all-around semiconductor device having germanium or group III-V active layer |
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JP4991814B2 (ja) | 2012-08-01 |
US20110062421A1 (en) | 2011-03-17 |
US8314464B2 (en) | 2012-11-20 |
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