JP6671371B2 - トンネル電界効果トランジスタ及びその製造方法 - Google Patents
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- 230000005669 field effect Effects 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 32
- 229910052710 silicon Inorganic materials 0.000 claims description 32
- 239000010703 silicon Substances 0.000 claims description 32
- 239000002019 doping agent Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 23
- 239000002070 nanowire Substances 0.000 claims description 22
- 239000012212 insulator Substances 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 17
- 230000005641 tunneling Effects 0.000 claims description 16
- 229910005939 Ge—Sn Inorganic materials 0.000 claims description 6
- 229910008310 Si—Ge Inorganic materials 0.000 claims description 5
- 239000010410 layer Substances 0.000 description 83
- 229910000577 Silicon-germanium Inorganic materials 0.000 description 45
- 239000002184 metal Substances 0.000 description 22
- 229910052751 metal Inorganic materials 0.000 description 22
- 229910021332 silicide Inorganic materials 0.000 description 19
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 19
- 239000000463 material Substances 0.000 description 13
- 230000005684 electric field Effects 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- -1 Boron ions Chemical class 0.000 description 4
- 229910019001 CoSi Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 229910052718 tin Inorganic materials 0.000 description 4
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 3
- 238000000231 atomic layer deposition Methods 0.000 description 3
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Description
102:エピタキシャル層、例えばSiGe層
103:ゲート電極のための絶縁体
104:ゲート電極
105:ドープされたドレイン領域
106:ドープされたポケット領域
107:側方に配置された酸化物スペーサ、例えばSiO2または窒化シリコンからなる
108:シリサイド、例えばCoSiまたはCoSi2
109:マスク
110:ドープされたシリコン
111:高ドープされた半導体領域、シリサイドからのドーパントの偏析により形成された領域
121:半導体材料からなるナノワイヤ
122:絶縁体
123:ドープされたエピタキシャル層、例えばSiGe層の形成するポケット領域
124:ゲート電極のための絶縁体
125:ゲート電極
126:側方に配置された酸化物スペーサ、例えばSiO2または窒化シリコンからなる
127:ドープされたドレイン領域
128:シリコン、例えばCoSiまたはCoSi2
129:高ドープされた半導体領域、シリサイドからのドーパントの偏析により形成された領域
Claims (16)
- ソース領域、チャネル領域及びドレイン領域を有するトンネル電界効果トランジスタ(TFET)を製造する方法であって、
−シリコン基板(101,121)上にエピタキシャル層(102,123)が配置され、
−この層の上に、ゲート電極(104,125)を有するゲート構造が着設され、ゲート絶縁体(103,124)がゲート電極とシリコン基板との間に配置され、
−ドープされたポケット領域(106,123)が、ゲート領域に隣接するようにゲート絶縁体(103,124)の下側に形成され
る工程を有する方法において、
−ソース領域には、選択的にシリサイド化された領域(108,128)がゲートの下側に至るまで形成されており、
−ソース領域にはさらに、ポケット領域(106,128)とは逆型にドープされた領域(111,129)が、シリサイド化された領域(108,128)からのドーパントの外方拡散によってポケット領域(106,128)に隣接して形成され、これにより、トンネル接合のトンネリングがゲート電極(104,125)の電気力線に平行に実現されることを特徴とする方法。 - エピタキシャル層にSi−Ge、Ge、Ge−SnまたはSi−Ge−Snが用いられる請求項1に記載の方法。
- ドープされた領域(111,129)は、ソース領域(108,128)の選択的なシリサイド化、続いてドーピング、さらに続いてドーパントの外方拡散によって生成される請求項1から2のいずれか一項に記載の方法。
- ドープされた領域(111,129)は、ソース領域(110)のドーピング、続いて選択的シリサイド化、さらに続いてドーパントの外方拡散によって生成される請求項1から2のいずれか一項に記載の方法。
- ドーパントの外方拡散は、シリサイド化された領域(108,128)からポケット領域(106,128)内に至るまで行われる請求項1から4のいずれか一項に記載の方法。
- ドープ領域(111,129)は、シリサイド化された領域(108,128)に対して自己整合的に形成される請求項1から5のいずれか一項に記載の方法。
- プレーナ型のSi基板が使用され、逆型にドープされた領域(111)が、ドープされたポケット領域の下に形成される請求項1から6のいずれか一項に記載の方法。
- 逆型にドープされた領域(129)が、周囲のドープされたポケット領域(123)の中心に形成される請求項1から6のいずれか一項に記載の方法。
- ドレイン領域(105)は、ドープされたポケット領域(106,123)と同じ導電型にドープされる請求項1から8のいずれか一項に記載の方法。
- トンネル電界効果トランジスタ(TFET)であって、
−Si基板(101,121)と、
−その上に配置されたエピタキシャル層(102,123)と、
−その上に配置された、ゲート電極(104,125)と、当該ゲート電極とSi基板との間に配置されたゲート絶縁体(103,124)とを有するゲート構造と、
−ゲート絶縁体の下側に配置されたチャネル(102,121)及び当該チャネルに隣接するドレイン領域(105,127)と、
−ゲート絶縁体(103,124)の下側且つチャネル(102,121)に隣接して配置されたドープされたポケット領域(106,123)及び当該ポケット領域に隣接するソース領域と、
を有するトンネル電界効果トランジスタにおいて、
−ソース領域は、少なくとも部分的にゲート構造の下側に配置されているシリサイド化された領域(108,128)を有し、
−ソース領域は、ポケット領域(106,123)とは逆型にドープされた第一の領域(111,129)を有し、当該領域が、カウンタドープされたポケットに隣接するとともに少なくとも部分的に当該ポケットの下側に配置され、シリサイド化された領域に隣接して配置されており、縦型トンネル接合がゲート電極(104,125)の電気力線に平行に存在し、このトンネル接合を通して、ゲート電極の電気力線に平行にトンネリングを行なうことができる
ことを特徴とするトンネル電界効果トランジスタ。 - Si−Ge、Ge、Ge−SnまたはSi−Ge−Snを含むエピタキシャル層を有する請求項10に記載のトンネル電界効果トランジスタ(TFET)。
- ポケット領域(106,123)とは逆型にドープされた領域(111,129)は、3nmから5nmの間の層厚を有する請求項10から11のいずれか一項に記載のトンネル電界効果トランジスタ(TFET)。
- プレーナ型のSi基板(101)を有し、ポケット領域(106)とは逆型にドープされた領域(111)がポケット領域の下側に配置されている請求項10から12のいずれか一項に記載のトンネル電界効果トランジスタ(TFET)。
- Si基板としてのナノワイヤ(121)と、環状のポケット領域(123)と、環状に配置されたゲート構造(124,125)とを有し、環状のポケット領域とは逆型にドープされた領域(129)が、ポケット領域(123)の中央に配置されている請求項10から12のいずれか一項に記載のトンネル電界効果トランジスタ(TFET)。
- ソース領域(128,129)、チャネル領域(121)およびドレイン領域(127)は、ナノワイヤの内部に形成されている請求項11から14のいずれか一項に記載のトンネル電界効果トランジスタ(TFET)。
- 逆型にドープされたポケットは、1018cm−3〜1020cm−3の間のドーパント密度を有している請求項11から15のいずれか一項に記載のトンネル電界効果トランジスタ(TFET)。
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DE102014018382.3 | 2014-12-15 | ||
DE102014018382.3A DE102014018382B4 (de) | 2014-12-15 | 2014-12-15 | Tunnel-Feldeffekttransistor sowie Verfahren zu dessen Herstellung |
PCT/DE2015/000531 WO2016095885A1 (de) | 2014-12-15 | 2015-11-04 | Tunnel-feldeffekttransistor sowie verfahren zu dessen herstellung |
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CN107924941B (zh) * | 2015-09-01 | 2020-09-04 | 华为技术有限公司 | 隧穿场效应晶体管及其制备方法 |
WO2017171824A1 (en) * | 2016-03-31 | 2017-10-05 | Intel Corporation | High mobility asymmetric field effect transistors with a band-offset semiconductor drain spacer |
US11004985B2 (en) | 2016-05-30 | 2021-05-11 | Samsung Electronics Co., Ltd. | Semiconductor device having multi-thickness nanowire |
KR20170135115A (ko) * | 2016-05-30 | 2017-12-08 | 삼성전자주식회사 | 반도체 장치 및 그 제조 방법 |
US10276663B2 (en) * | 2016-07-18 | 2019-04-30 | United Microelectronics Corp. | Tunneling transistor and method of fabricating the same |
DE102016010106A1 (de) | 2016-08-20 | 2018-02-22 | Forschungszentrum Jülich GmbH | Feldeffekttransistor zur Erzeugung von Tunnelströmen mit vertikalem Strompfad durch dünne Schichten |
US20180138307A1 (en) * | 2016-11-17 | 2018-05-17 | Globalfoundries Inc. | Tunnel finfet with self-aligned gate |
WO2018148909A1 (zh) * | 2017-02-16 | 2018-08-23 | 华为技术有限公司 | 制作隧穿场效应晶体管的方法 |
WO2018161206A1 (zh) * | 2017-03-06 | 2018-09-13 | 华为技术有限公司 | 制作隧穿场效应晶体管的方法与制作反相器的方法 |
US10644150B2 (en) * | 2018-06-04 | 2020-05-05 | International Business Machines Corporation | Tunnel field-effect transistor with reduced subthreshold swing |
KR20210035553A (ko) * | 2019-09-24 | 2021-04-01 | 삼성전자주식회사 | 도메인 스위칭 소자 및 그 제조방법 |
CN110729355B (zh) * | 2019-10-23 | 2021-04-27 | 电子科技大学 | 一种改善亚阈值摆幅的纵向隧穿场效应晶体管 |
KR102370148B1 (ko) * | 2020-08-05 | 2022-03-04 | 한국과학기술원 | 스팁-슬롭 전계 효과 트랜지스터와 그 제조 방법 |
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US20090101972A1 (en) * | 2007-10-17 | 2009-04-23 | Gaines R Stockton | Process for fabricating a field-effect transistor with doping segregation used in source and/or drain |
US8384122B1 (en) | 2008-04-17 | 2013-02-26 | The Regents Of The University Of California | Tunneling transistor suitable for low voltage operation |
US9577079B2 (en) * | 2009-12-17 | 2017-02-21 | Infineon Technologies Ag | Tunnel field effect transistors |
US8343815B2 (en) * | 2010-05-11 | 2013-01-01 | International Business Machines Corporation | TFET with nanowire source |
US8258031B2 (en) * | 2010-06-15 | 2012-09-04 | International Business Machines Corporation | Fabrication of a vertical heterojunction tunnel-FET |
JP2012164699A (ja) * | 2011-02-03 | 2012-08-30 | Toshiba Corp | 半導体装置 |
JP5383732B2 (ja) * | 2011-03-09 | 2014-01-08 | 株式会社東芝 | 半導体装置 |
CN102751325B (zh) * | 2011-04-21 | 2015-09-16 | 中国科学院微电子研究所 | 一种隧穿场效应晶体管及其制造方法 |
DE102011119497B4 (de) | 2011-11-26 | 2013-07-04 | Forschungszentrum Jülich GmbH | Band zu Band Tunnel-Feldeffekttransistor mit gradierter Halbleiterheterostruktur im Tunnelübergang und Verfahren zu dessen Herstellung |
JP5728444B2 (ja) * | 2012-08-23 | 2015-06-03 | 株式会社東芝 | 半導体装置およびその製造方法 |
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CN107004701A (zh) | 2017-08-01 |
EP3235002B1 (de) | 2020-01-29 |
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DE102014018382A1 (de) | 2016-06-16 |
CN107004701B (zh) | 2020-10-09 |
US10153343B2 (en) | 2018-12-11 |
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