JP5409665B2 - 状態密度が設計された電界効果トランジスタ - Google Patents
状態密度が設計された電界効果トランジスタ Download PDFInfo
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- 230000005669 field effect Effects 0.000 title description 4
- 239000004065 semiconductor Substances 0.000 claims description 140
- 229910052751 metal Inorganic materials 0.000 claims description 53
- 239000002184 metal Substances 0.000 claims description 53
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 claims description 35
- 230000004888 barrier function Effects 0.000 claims description 27
- 108010075750 P-Type Calcium Channels Proteins 0.000 claims description 23
- 229910005542 GaSb Inorganic materials 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 11
- LVQULNGDVIKLPK-UHFFFAOYSA-N aluminium antimonide Chemical compound [Sb]#[Al] LVQULNGDVIKLPK-UHFFFAOYSA-N 0.000 claims description 5
- VTGARNNDLOTBET-UHFFFAOYSA-N gallium antimonide Chemical compound [Sb]#[Ga] VTGARNNDLOTBET-UHFFFAOYSA-N 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 294
- 229910000673 Indium arsenide Inorganic materials 0.000 description 32
- 108091006146 Channels Proteins 0.000 description 23
- 238000010586 diagram Methods 0.000 description 11
- 230000000295 complement effect Effects 0.000 description 7
- 230000005428 wave function Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 108090000699 N-Type Calcium Channels Proteins 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005476 size effect Effects 0.000 description 2
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- 229910003855 HfAlO Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- MDPILPRLPQYEEN-UHFFFAOYSA-N aluminium arsenide Chemical compound [As]#[Al] MDPILPRLPQYEEN-UHFFFAOYSA-N 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
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- H01L29/7783—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with confinement of carriers by at least two heterojunctions, e.g. DHHEMT, quantum well HEMT, DHMODFET using III-V semiconductor material
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- H01L21/8232—Field-effect technology
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Description
となり、最大のデバイス電流を制限し得る。In0.53Ga0.47Asなどの典型的な被覆層(mn=0.086)は、いくらか高い質量を有するだけで、量子井戸の設計で統合された電子の有効質量mnを実質的に上げることができない。
2nmのInAs層厚において、δon の実際値は、約3−4x1011cm-2であり、室温で達成可能なHSR値を約5000に低下させ得る。より高いSNRは、より薄いInAs層で達成し得る。一般的に、上限のHSRは、0.5* ln(2) *(mH/mn) *exp(E0 - Ec)/kTを用いて推定され得、これはほぼexp(E0 - Ec)/kTと同じであり、その中のmH=0.2およびmn=0.067である。1.5、2、および5nmのInAs層厚において、E0 - Ec=0.38、0.29、および0.11eVは、室温でそれぞれ2.4x106、7.3x104、および70の理論HSRとなる。
オン状態の伝導は、nチャネルおよびp型チャネルデバイスの両方に対して同一の統合された有効質量(mH=0.2)を備えたハイブリッド状態EHを経由するため、
p型チャネルのオン状態の特性は、n−チャネル挙動(behavior)を反映することになる。図9A〜12Bに示された実施の形態は、高性能(“HP”)、低動作電力(“LOP”)、および低待機電力(“LSTP”)デバイスを実施するのに用いられ得る。
102 ゲート金属
104 高kゲート誘電体
106 低い電子の有効質量
108 高い電子の有効質量
110 広バンドギャップ被覆半導体層
112 基板
114 106〜110の層
300 構造
302 ゲート金属
304 高kゲート誘電体
306 半導体障壁層
308 低い電子の有効質量
310 高い電子の有効質量
312 広バンドギャップ被覆半導体層
314 基板
316 306〜312の層
500 MOSFET
502 N型延伸部
600 構造
602 ゲート金属
604 高kゲート誘電体
606 伝導帯底
608 広バンドギャップ被覆半導体層
610 価電子帯の頂上
612 広バンドギャップ半導体のバッファ層
614 ドープされた広バンドギャップ半導体のバッファ層
616 基板
618 606〜614の層
900 構造
902 ゲート金属
904 高kゲート誘電体
906 伝導帯底
908 広バンドギャップ被覆半導体層
910 価電子帯の頂上
912 広バンドギャップ半導体のバッファ層
914 ドープされた広バンドギャップ半導体のバッファ層
916 基板
918 906〜914の層
Claims (22)
- nチャネルトランジスタを製作するのに用いる層構造であって、前記層構造は、
伝導帯底EC1を有する第1の半導体層、
離散正孔準位H0を有する第2の半導体層、
前記第1と前記第2の半導体層との間に配置された広バンドギャップ半導体バリア層、
前記第1の半導体層の上方に配置されたゲート誘電体層、
前記ゲート誘電体層の上方に配置されたゲート金属層、
前記第2の半導体層の下方に配置された広バンドギャップ半導体バッファ層、
前記広バンドギャップ半導体バッファ層の下方に配置されたp型ドープの広バンドギャップ半導体バッファ層、および
前記p型ドープの広バンドギャップ半導体バッファ層の下方に配置された基板を含み、
前記離散正孔準位H0は、前記伝導帯底EC1の下方に位置され、前記ゲート金属層にゼロバイアスが供給される層構造。 - 前記伝導帯底EC1は、−4.9eVである請求項1に記載の層構造。
- 前記第1半導体層の電子密度は、前記ゲート金属層に正バイアスを加えた時、急激に増加する請求項1に記載の層構造。
- 前記広バンドギャップ半導体バリア層は、アンチモン化砒化アルミニウム(AlAsSb)を含み、かつ約2nmの層厚を有する請求項1に記載の層構造。
- 前記第1の半導体層は、ヒ化インジウム(InAs)を含み、かつ約2nmの層厚を有する請求項1に記載の層構造。
- 前記第2の半導体層は、アンチモン化ガリウム(GaSb)を含み、かつ約2nmの層厚を有する請求項1に記載の層構造。
- 前記広バンドギャップ半導体バッファ層は、アンチモン化砒化アルミニウム(AlAsSb)を含み、かつ約20nmの層厚を含む請求項1に記載の層構造。
- 前記p型広バンドギャップ半導体バッファ層は、p型ドープのAlAsSbを含む請求項1に記載の層構造。
- 前記nチャネルトランジスタは、低動作電力(“LOP”)デバイス、高性能(“HP”)デバイス、または低待機電力(“LSTP”)デバイスに用いられる請求項1に記載の層構造。
- p型チャネルトランジスタを製作するのに用いる層構造であって、
前記層構造は、
離散正孔準位H0を有する第1の半導体層、
伝導帯底EC2を有する第2の半導体層、
前記第1と前記第2の半導体層との間に配置された広バンドギャップ半導体バリア層、
前記第1の半導体層の上方に配置されたゲート誘電体層、
前記ゲート誘電体層の上方に配置されたゲート金属層、
前記第2の半導体層の下方に配置された広バンドギャップ半導体バッファ層、
前記広バンドギャップ半導体バッファ層の下方に配置されたn型ドープの広バンドギャップ半導体バッファ層、および
前記n型ドープの広バンドギャップ半導体バッファ層の下方に配置された基板を含み、
前記離散正孔準位H0は、伝導帯底EC2の下方に位置され、前記ゲート金属層にゼロバイアスが供給される層構造。 - 前記伝導帯底EC2は、−4.9eVである請求項10に記載の層構造。
- 前記第1半導体層の正孔密度は、前記ゲート金属層に負バイアスを加えた時、急激に増加する請求項10に記載の層構造。
- 前記広バンドギャップ半導体バリア層は、アンチモン化砒化アルミニウム(AlAsSb)を含み、かつ約2nmの層厚を有する請求項10に記載の層構造。
- 前記第1の半導体層は、アンチモン化ガリウム(GaSb)を含み、かつ約2nmの層厚を有する請求項10に記載の層構造。
- 前記第2の半導体層は、ヒ化インジウム(InAs)を含み、かつ約2nmの層厚を有する請求項10に記載の層構造。
- 前記広バンドギャップ半導体バッファ層は、アンチモン化砒化アルミニウム(AlAsSb)を含み、かつ約20nmの層厚を含む請求項10に記載の層構造。
- 前記n型広バンドギャップ半導体バッファ層は、n型ドープのAlAsSbを含む請求項10に記載の層構造。
- 前記nチャネルトランジスタは、低動作電力(“LOP”)デバイス、高性能(“HP”)デバイス、または低待機電力(“LSTP”)デバイスに用いられる請求項10に記載の層構造。
- 本質的に平面なインバータ回路であって、
伝導帯底EC1を有する第1の半導体層、
第1の離散正孔準位H0を有する第2の半導体層、
前記第1と前記第2の半導体層との間に配置された第1の広バンドギャップ半導体バリア層、
前記第1の半導体層の上方に配置された第1のゲート誘電体層、および
前記第1のゲート誘電体層の上方に配置された第1のゲート金属層を含み、
前記第1の離散正孔準位H0は、前記伝導帯底EC1の下方に位置され、前記第1のゲート金属層にゼロバイアスが供給される、第1の層構造を用いたnチャネルトランジスタ、および
前記第2の離散正孔準位H0を有する第3の半導体層、
伝導帯底EC2を有する第4の半導体層、
前記第3と前記第4の半導体層との間に配置された第2の広バンドギャップ半導体バリア層、
前記第3の半導体層の上方に配置された第2のゲート誘電体層、
前記第2のゲート誘電体層の上方に配置された第2のゲート金属層、を有する第2の層構造を用いたp型チャネルトランジスタを含み、
前記第1の層構造は、
前記第2の半導体層の下方に配置された第1の広バンドギャップ半導体バッファ層、および
前記第1の広バンドギャップ半導体バッファ層の下方に配置されたp型ドープの広バンドギャップ半導体バッファ層を含み、かつ
前記第2の層構造は、
前記第4の半導体層の下方に配置された第2の広バンドギャップ半導体バッファ層、および
前記第2の広バンドギャップ半導体バッファ層の下方に配置されたn型ドープの広バンドギャップ半導体バッファ層を含み、
前記第2の離散正孔準位H0は、伝導帯底EC1の下方に位置され、前記第2のゲート金属層にゼロバイアスが供給されるインバータ回路。 - 前記第1半導体層の電子密度は、前記第1のゲート金属層に正バイアスを加えた時、急激に増加する請求項19に記載のインバータ回路。
- 前記第3半導体層の正孔密度は、前記第2のゲート金属層に負バイアスを加えた時、急激に増加する請求項19に記載のインバータ回路。
- 前記インバータ回路は、低動作電力(“LOP”)デバイス、高性能(“HP”)デバイス、または低待機電力(“LSTP”)デバイスに用いられる請求項19記載のインバータ回路。
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US30300910P | 2010-02-10 | 2010-02-10 | |
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US12/974,775 US8735903B2 (en) | 2010-02-10 | 2010-12-21 | Density of states engineered field effect transistor |
US12/974,775 | 2010-12-21 |
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US9209180B2 (en) * | 2010-02-10 | 2015-12-08 | Taiwan Semiconductor Manufacturing Company, Ltd. | Field effect transistor with conduction band electron channel and uni-terminal response |
US9735239B2 (en) | 2012-04-11 | 2017-08-15 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device channel system and method |
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US9093273B2 (en) * | 2013-08-23 | 2015-07-28 | Taiwan Semiconductor Manufacturing Company, Ltd. | Multiple-threshold voltage devices and method of forming same |
CN104766800B (zh) * | 2014-01-08 | 2018-07-20 | 北大方正集团有限公司 | 一种低压铝栅器件的加工方法及低压铝栅器件 |
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US5243206A (en) * | 1991-07-02 | 1993-09-07 | Motorola, Inc. | Logic circuit using vertically stacked heterojunction field effect transistors |
US5355005A (en) * | 1992-11-04 | 1994-10-11 | Motorola, Inc. | Self-doped complementary field effect transistor |
US5349214A (en) * | 1993-09-13 | 1994-09-20 | Motorola, Inc. | Complementary heterojunction device |
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