JP6549208B2 - 非平面ゲルマニウム量子井戸デバイス - Google Patents
非平面ゲルマニウム量子井戸デバイス Download PDFInfo
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- JP6549208B2 JP6549208B2 JP2017229213A JP2017229213A JP6549208B2 JP 6549208 B2 JP6549208 B2 JP 6549208B2 JP 2017229213 A JP2017229213 A JP 2017229213A JP 2017229213 A JP2017229213 A JP 2017229213A JP 6549208 B2 JP6549208 B2 JP 6549208B2
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- Prior art keywords
- germanium
- quantum well
- semiconductor
- gate
- layer
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- 229910052732 germanium Inorganic materials 0.000 title claims description 55
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 title claims description 53
- 239000000463 material Substances 0.000 claims description 59
- 239000004065 semiconductor Substances 0.000 claims description 43
- 239000000758 substrate Substances 0.000 claims description 24
- 238000002955 isolation Methods 0.000 claims description 23
- 239000003989 dielectric material Substances 0.000 claims description 21
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims 2
- 229910052785 arsenic Inorganic materials 0.000 claims 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims 2
- 230000003796 beauty Effects 0.000 claims 2
- 229910052733 gallium Inorganic materials 0.000 claims 2
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- 229910000577 Silicon-germanium Inorganic materials 0.000 description 13
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- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 1
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- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- ILCYGSITMBHYNK-UHFFFAOYSA-N [Si]=O.[Hf] Chemical compound [Si]=O.[Hf] ILCYGSITMBHYNK-UHFFFAOYSA-N 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- FTWRSWRBSVXQPI-UHFFFAOYSA-N alumanylidynearsane;gallanylidynearsane Chemical compound [As]#[Al].[As]#[Ga] FTWRSWRBSVXQPI-UHFFFAOYSA-N 0.000 description 1
- MDPILPRLPQYEEN-UHFFFAOYSA-N aluminium arsenide Chemical compound [As]#[Al] MDPILPRLPQYEEN-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- VKJLWXGJGDEGSO-UHFFFAOYSA-N barium(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[Ti+4].[Ba+2] VKJLWXGJGDEGSO-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
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- 238000005229 chemical vapour deposition Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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- 239000010931 gold Substances 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- -1 lanthanum aluminate Chemical class 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- KJXBRHIPHIVJCS-UHFFFAOYSA-N oxo(oxoalumanyloxy)lanthanum Chemical compound O=[Al]O[La]=O KJXBRHIPHIVJCS-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- CZXRMHUWVGPWRM-UHFFFAOYSA-N strontium;barium(2+);oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[Ti+4].[Sr+2].[Ba+2] CZXRMHUWVGPWRM-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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Description
上述のように、典型的にIII−V族材料系のエピタキシャル成長半導体ヘテロ構造内に形成された量子井戸トランジスタデバイスは、低い有効質量と変調デルタドーピングによる抑制された不純物散乱とによって、トランジスタチャネルに非常に高いキャリア移動度をもたらす。これらの従来デバイスは非常に高い駆動電流性能を提供する。このような量子井戸システムは典型的に、プレーナアーキテクチャを用いて製造される。
図1は、本発明の一実施形態に係る非平面ゲルマニウム量子井戸デバイスを製造するのに使用され得るGe量子井戸成長構造の一例の断面図を示している。量子井戸成長構造は、例えば、従来の、キャップ層を備えたSiGe/Ge又はGaAs/Ge量子井戸構造とし得る。しかしながら、上述のように、本発明の一実施形態に従って形成される変調/デルタドープ非平面Ge量子井戸トランジスタデバイスは、この開示を受けて明らかになるように、様々なIV族若しくはIII−V族材料、ドーピング層及びバッファ層で構成される如何なる数の量子井戸成長構造を用いて実現されてもよい。請求項記載発明は、何らかの特定の量子井戸成長構成に限定されるものではない。
図2−8は、本発明の一実施形態に従って構成されるGeフィンに基づく量子井戸構造の形成を示す断面図及び斜視図である。認識されるように、フィンに基づく構造は、図1に示したデバイススタックの上、又はアンドープのGeチャネルを有する他の何らかの変調/デルタドープ量子井戸成長構造の上に形成されることができる。なお、明示的には説明しないが、この形成プロセス全体を通して、例えば平坦化(例えば、化学機械研磨すなわちCMP)及びその後の洗浄処理などの中間プロセスが含められ得る。
図9は、本発明の一実施形態に係る、ゲルマニウムフィンベースの変調/デルタドープ量子井戸構造を形成する方法を示している。量子井戸構造は、所望のように構成されることができ、概して、基板、IV/III−V族バリア層、(変調/デルタドープされた)ドーピング層、及び量子井戸層を含んだスタック(積層体)を含む。
Claims (14)
- 頂面と、該頂面の反対側の底面と、該頂面と該底面との間の両側の側壁とを持つゲルマニウムのボディであり、当該ゲルマニウムのボディの前記底面が、ゲルマニウムよりも高いバンドギャップを持つ第1の半導体材料上にあり、当該ゲルマニウムのボディは圧縮歪みを含んでいる、ゲルマニウムのボディと、
前記ゲルマニウムのボディの前記頂面及び前記側壁と接触した第2の半導体材料であり、ゲルマニウムよりも高いバンドギャップを持つ第2の半導体材料と、
前記第2の半導体材料の少なくとも一部を覆うゲート構造であり、当該ゲート構造は、ゲート電極及びゲート誘電体を有し、前記ゲート誘電体は、前記ゲート電極と前記第2の半導体材料との間にあり、前記ゲート誘電体は、前記第2の半導体材料とは別個であり且つ前記第2の半導体材料と接触している、ゲート構造と、
を有し、
前記第1の半導体材料はIII−V族化合物半導体を有し、前記第2の半導体材料はシリコンとゲルマニウムから成る、
半導体デバイス。 - 前記第1の半導体材料は、1つ以上の層を含んだ半導体構造の一部であり、前記半導体構造の第1の側壁が、第1のアイソレーション領域と隣接し、前記半導体構造の第2の側壁が、第2のアイソレーション領域と隣接し、前記第1及び第2のアイソレーション領域は各々、上面及び下面を有する、請求項1に記載のデバイス。
- 前記半導体構造は、1つ以上の傾斜された半導体部分を含む、請求項2に記載のデバイス。
- 前記ゲート電極及び前記ゲート誘電体の少なくとも一方が、前記第1のアイソレーション領域の前記上面上及び前記第2のアイソレーション領域の前記上面上にあり、前記第1のアイソレーション領域の前記下面及び前記第2のアイソレーション領域の前記下面は、前記半導体構造上にある、請求項2に記載のデバイス。
- 前記半導体構造は、p型不純物又はn型不純物を含有する領域を含む、請求項2に記載のデバイス。
- 前記III−V族化合物半導体は、ガリウム、ヒ素、及びアルミニウムのうちの少なくとも2つを含む、請求項1に記載のデバイス。
- ソース領域又はドレイン領域を更に含む請求項1に記載のデバイス。
- 前記ゲート構造の第1の側に隣接するソース領域と、前記ゲート構造の第2の側に隣接するドレイン領域と、を更に含む請求項1に記載のデバイス。
- 前記ゲート誘電体は、high−kゲート誘電体材料を有し、前記ゲート電極は、前記high−kゲート誘電体材料上にある、請求項1に記載のデバイス。
- シリコン基板を更に有する請求項1に記載のデバイス。
- 各々が上面と反対側の下面とを持つ第1のアイソレーション領域及び第2のアイソレーション領域と、
頂面と、該頂面の反対側の底面と、該頂面と該底面との間の両側の側壁とを持つゲルマニウムフィンであり、当該ゲルマニウムフィンの前記底面が、ゲルマニウムよりも高いバンドギャップを持つ第1の半導体材料上にあり、前記第1の半導体材料は、1つ以上の層を含んだ半導体構造の一部であり、前記半導体構造の第1の側壁が、前記第1のアイソレーション領域と隣接し、前記半導体構造は、p型不純物又はn型不純物を含有する領域を含む、ゲルマニウムフィンと、
前記ゲルマニウムフィンの前記頂面及び前記側壁と接触した第2の半導体材料であり、ゲルマニウムよりも高いバンドギャップを持つ第2の半導体材料と、
前記第2の半導体材料の少なくとも一部を覆うゲート構造であり、当該ゲート構造は、ゲート電極及びゲート誘電体を有し、前記ゲート誘電体は、前記ゲート電極と前記第2の半導体材料との間にあり、前記ゲート誘電体は、high−kゲート誘電体材料を有し、前記第2の半導体材料とは別個であり、且つ前記第2の半導体材料と接触しており、前記ゲート電極は、前記high−kゲート誘電体材料上にあり、前記ゲート電極及び前記ゲート誘電体の少なくとも一方が、前記第1のアイソレーション領域の前記上面上及び前記第2のアイソレーション領域の前記上面上にあり、前記第1のアイソレーション領域の前記下面及び前記第2のアイソレーション領域の前記下面は、前記半導体構造上にある、ゲート構造と、
を有し、
前記第1の半導体材料はIII−V族化合物半導体を有し、前記第2の半導体材料はシリコンとゲルマニウムから成る、
集積回路。 - 前記半導体構造は、1つ以上の傾斜された部分を含む、請求項11に記載の集積回路。
- 前記III−V族化合物半導体は、ガリウム、ヒ素、及びアルミニウムのうちの少なくとも2つを含む、請求項11に記載の集積回路。
- シリコン基板を更に有する請求項11に記載の集積回路。
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CN105870168A (zh) | 2016-08-17 |
JP6301301B2 (ja) | 2018-03-28 |
US20110147711A1 (en) | 2011-06-23 |
WO2011087570A1 (en) | 2011-07-21 |
US8283653B2 (en) | 2012-10-09 |
HK1175589A1 (zh) | 2013-07-05 |
JP2018041979A (ja) | 2018-03-15 |
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US9799759B2 (en) | 2017-10-24 |
CN102656699B (zh) | 2016-05-04 |
EP2517256A1 (en) | 2012-10-31 |
US20160172472A1 (en) | 2016-06-16 |
US20140054548A1 (en) | 2014-02-27 |
EP2996154A3 (en) | 2016-04-20 |
EP2996154B1 (en) | 2021-04-21 |
JP2013513250A (ja) | 2013-04-18 |
KR20120085929A (ko) | 2012-08-01 |
US20180047839A1 (en) | 2018-02-15 |
US8575596B2 (en) | 2013-11-05 |
CN104900693A (zh) | 2015-09-09 |
CN102656699A (zh) | 2012-09-05 |
CN104900693B (zh) | 2018-06-08 |
KR101378661B1 (ko) | 2014-03-26 |
US10236369B2 (en) | 2019-03-19 |
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