JP6339230B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP6339230B2 JP6339230B2 JP2016563006A JP2016563006A JP6339230B2 JP 6339230 B2 JP6339230 B2 JP 6339230B2 JP 2016563006 A JP2016563006 A JP 2016563006A JP 2016563006 A JP2016563006 A JP 2016563006A JP 6339230 B2 JP6339230 B2 JP 6339230B2
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- 239000004065 semiconductor Substances 0.000 title claims description 80
- 229910052751 metal Inorganic materials 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 46
- 239000012212 insulator Substances 0.000 claims description 37
- 239000000758 substrate Substances 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 30
- 229910052710 silicon Inorganic materials 0.000 description 30
- 239000010703 silicon Substances 0.000 description 30
- 239000012535 impurity Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 6
- 240000004050 Pentaglottis sempervirens Species 0.000 description 4
- 235000004522 Pentaglottis sempervirens Nutrition 0.000 description 4
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000002070 nanowire Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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Description
例えば、柱状半導体層を柱状シリコン層とし、前記第1の仕事関数は、5.0eVから5.2eVの間とし、前記第2の仕事関数は、4.0eVから4.2eVの間とすると、p型シリコンの仕事関数5.15eVの近傍であるため、柱状半導体層の第1のゲートと第3のゲートに囲われた部分はp型シリコンとして機能し、n型シリコンの仕事関数4.05eVの近傍であるため、柱状半導体層の第2のゲートに囲われた部分はn型シリコンとして機能することにより、p型シリコンとして機能する部分とn型シリコンとして機能する部分とp型シリコンとして機能する部分とにより、金属と半導体との仕事関数差によって柱状半導体層に超格子もしくは量子井戸構造を形成することができる。
このとき、金属と半導体との仕事関数差によって柱状半導体層に超格子もしくは量子井戸構造を形成するから、p型シリコンとして機能する部分とn型シリコンとして機能する部分との間に界面は存在しないため、欠陥を減少させることができる。また、不純物を用いていないため、不純物の位置制御は不要であるし、不純物によるキャリアの散乱を抑制することができる。
例えば、柱状半導体層を柱状シリコン層とし、ソースもしくはドレインをn型とし、第1のゲートと第3のゲートの高さをバリスティック伝導が起こる程度の高さとし、前記第2の仕事関数は4.0eVから4.2eVの間とし、前記第1の仕事関数を前記第2の仕事関数以上の仕事関数とすると、柱状半導体層の第1のゲートと第3のゲートに囲われた部分はトランジスタのチャネルとして機能し、n型シリコンの仕事関数4.05eVの近傍であるため、柱状半導体層の第2のゲートに囲われた部分はn型シリコンとして機能することにより、チャネルとして機能する部分とn型シリコンとして機能する部分とチャネルとして機能する部分とにより、バリスティック伝導を有するトランジスタを2個直列することにより、バリスティック伝導を有し且つゲート長が長いトランジスタを可能とする。
102.柱状半導体層
103.第1の絶縁物
104.第1のゲート
105.第2のゲート
106.第3のゲート
107.第4のゲート
108.第5のゲート
109.ソースもしくはドレイン
110.ソースもしくはドレイン
211.第2の絶縁膜
212.第3の絶縁膜
213.第4の絶縁膜
214.第5の絶縁膜
Claims (13)
- 基板上に形成された柱状半導体層と、
前記柱状半導体層を囲む第1の絶縁物と、
前記第1の絶縁物を取り囲む第1の仕事関数を有する金属からなる第1のゲートと、
前記第1の絶縁物を取り囲む前記第1の仕事関数と異なる第2の仕事関数を有する金属からなる第2のゲートと、
前記第2のゲートは前記第1のゲートの下方に位置するのであって、
前記第1の絶縁物を取り囲む第1の仕事関数を有する金属からなる第3のゲートと、を有し、
前記第3のゲートは前記第2のゲートの下方に位置するのであって、
前記第1の絶縁物を取り囲む前記第1の仕事関数と異なる第2の仕事関数を有する金属からなる第4のゲートと、を有し、
前記第4のゲートは前記第3のゲートの下方に位置するのであって、
前記第1のゲートと前記第2のゲートと前記第3のゲートと前記第4のゲートは電気的に接続することを特徴とする半導体装置。 - 前記第1の絶縁物を取り囲む前記第1の仕事関数を有する金属からなる第5のゲートと、を有し、
前記第5のゲートは前記第4のゲートの下方に位置するのであって、
前記第1のゲートと前記第2のゲートと前記第3のゲートと前記第4のゲートと前記第5のゲートは電気的に接続する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の仕事関数は、4.0eVから4.2eVの間であることを特徴とする請求項1または2に記載の半導体装置。
- 前記第1の仕事関数は、4.2eV以上であることを特徴とする請求項3に記載の半導体装置。
- 前記第2の仕事関数は、5.0eVから5.2eVの間であることを特徴とする請求項1または2に記載の半導体装置。
- 前記第1の仕事関数は、5.0eV以下であることを特徴とする請求項5に記載の半導体装置。
- 前記柱状半導体層の上部と下部にソースもしくはドレインを有することを特徴とする請求項1に記載の半導体装置。
- 前記ソースもしくはドレインは拡散層からなることを特徴とする請求項7に記載の半導体装置。
- 前記第1のゲートと前記第2のゲートとの間に形成された第2の絶縁膜と、
前記第2のゲートと前記第3のゲートとの間に形成された第3の絶縁膜と、
前記第3のゲートと前記第4のゲートとの間に形成された第4の絶縁膜を有することを特徴とする請求項1に記載の半導体装置。 - 前記第4のゲートと前記第5のゲートとの間に形成された第5の絶縁膜を有することを特徴とする請求項2に記載の半導体装置。
- 基板上に形成された柱状半導体層と、
前記柱状半導体層を囲む第1の絶縁物と、
前記第1の絶縁物を取り囲む第1の仕事関数を有する金属からなる第1のゲートと、
前記第1の絶縁物を取り囲む前記第1の仕事関数と異なる第2の仕事関数を有する金属からなる第2のゲートと、
前記第2のゲートは前記第1のゲートの下方に位置するのであって、
前記第1の絶縁物を取り囲む第1の仕事関数を有する金属からなる第3のゲートと、を有し、
前記第3のゲートは前記第2のゲートの下方に位置するのであって、
前記第1のゲートと前記第2のゲートと前記第3のゲートは電気的に接続することを特徴とし、
前記第1の仕事関数は、4.2eV以上であることを特徴とし、
前記柱状半導体層の上部と下部にn型のソースもしくはドレインを有することを特徴とする半導体装置。 - 前記ソースもしくはドレインは拡散層からなることを特徴とする請求項11に記載の半導体装置。
- 前記第2の仕事関数は、4.0eVから4.2eVの間であることを特徴とする請求項11に記載の半導体装置。
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PCT/JP2015/078821 WO2017061050A1 (ja) | 2015-10-09 | 2015-10-09 | 半導体装置 |
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WO2017085788A1 (ja) * | 2015-11-17 | 2017-05-26 | ユニサンティス エレクトロニクス シンガポール プライベート リミテッド | 半導体装置及び半導体装置の製造方法 |
WO2019132883A1 (en) * | 2017-12-27 | 2019-07-04 | Intel Corporation | Vertical transistor-based logic gate |
CN113228241B (zh) * | 2018-12-21 | 2024-10-18 | 新加坡优尼山帝斯电子私人有限公司 | 三维半导体装置的制造方法 |
US11804532B2 (en) * | 2021-08-27 | 2023-10-31 | Taiwan Semiconductor Manufacturing Co., Ltd. | Gate-all-around devices with superlattice channel |
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JPH09298296A (ja) | 1996-04-23 | 1997-11-18 | Taiwan Moshii Denshi Kofun Yugenkoshi | 導電性側壁間隙を備えたmos電界効果トランジスタ及びその製造方法 |
FR2830124B1 (fr) * | 2001-09-26 | 2005-03-04 | St Microelectronics Sa | Memoire vive |
JP4108537B2 (ja) | 2003-05-28 | 2008-06-25 | 富士雄 舛岡 | 半導体装置 |
KR100526889B1 (ko) * | 2004-02-10 | 2005-11-09 | 삼성전자주식회사 | 핀 트랜지스터 구조 |
JP2006269520A (ja) * | 2005-03-22 | 2006-10-05 | Renesas Technology Corp | 半導体装置およびその製造方法 |
JP2006310651A (ja) | 2005-04-28 | 2006-11-09 | Toshiba Corp | 半導体装置の製造方法 |
JP2008172164A (ja) | 2007-01-15 | 2008-07-24 | Toshiba Corp | 半導体装置 |
KR100861236B1 (ko) * | 2007-04-10 | 2008-10-02 | 경북대학교 산학협력단 | 낮은 누설전류를 갖는 기둥형 전계효과트랜지스터 |
JP2009200434A (ja) | 2008-02-25 | 2009-09-03 | Fujitsu Ltd | バリスティックmosトランジスタ |
US8273591B2 (en) | 2008-03-25 | 2012-09-25 | International Business Machines Corporation | Super lattice/quantum well nanowires |
GB201012236D0 (en) * | 2010-07-21 | 2010-09-08 | Qinetiq Ltd | Method of fabrication of semiconductor device |
US9997656B2 (en) * | 2014-12-17 | 2018-06-12 | Manjeri P. Anantram | Photodetector cell and solar panel with dual metal contacts and related methods |
US9419003B1 (en) * | 2015-05-15 | 2016-08-16 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor devices and methods of manufacture thereof |
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US10381451B2 (en) | 2019-08-13 |
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