JP2009509318A - SiGeへテロ接合バイポーラ・トランジスタにおける移動度の向上 - Google Patents
SiGeへテロ接合バイポーラ・トランジスタにおける移動度の向上 Download PDFInfo
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- 229910000577 Silicon-germanium Inorganic materials 0.000 title claims abstract description 142
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 133
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 128
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000004065 semiconductor Substances 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 11
- 230000005684 electric field Effects 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 239000000969 carrier Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000002290 germanium Chemical class 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000001451 molecular beam epitaxy Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000663 remote plasma-enhanced chemical vapour deposition Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 238000000038 ultrahigh vacuum chemical vapour deposition Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910005926 GexSi1-x Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910008310 Si—Ge Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
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- 230000006798 recombination Effects 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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- H10D10/00—Bipolar junction transistors [BJT]
- H10D10/80—Heterojunction BJTs
- H10D10/821—Vertical heterojunction BJTs
- H10D10/891—Vertical heterojunction BJTs comprising lattice-mismatched active layers, e.g. SiGe strained-layer transistors
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- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/82—Heterojunctions
- H10D62/822—Heterojunctions comprising only Group IV materials heterojunctions, e.g. Si/Ge heterojunctions
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/83—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge
- H10D62/832—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group IV materials, e.g. B-doped Si or undoped Ge being Group IV materials comprising two or more elements, e.g. SiGe
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Abstract
【解決手段】
本発明は、内部にSiGe含有層を持つベース領域を有する高性能ヘテロ接合バイポーラ・トランジスタ(HBT)に関する。SiGe含有層は、約100nmの厚さを超えず、所定の臨界ゲルマニウム含有量を有する。SiGe含有層はさらに、所定の臨界ゲルマニウム含有量の約80%を下回らない平均ゲルマニウム含有量を有する。本発明はまた、ベース層が100nmを超えない場合には、内部の平均ゲルマニウム含有量が、ベース層の厚さに基づいて計算される臨界ゲルマニウム含有量の80%を下回らないように、ベース層内のゲルマニウム含有量を均一に増加させることによって、SiGe含有ベース層を有するHBT内のキャリア移動度を向上させるための方法に関する。
【選択図】 図3
Description
Khateret al., "SiGeHBT Technology with fMax/fT=350/300GHz and Gate Delay Below3.3ps," IEEE Electron Devices Meeting, IEDM Technical Digest, 13-15December 2004, 247-250 J.C.Beanet al., "GexSi1-x/Si Strained-Layer SuperlatticeGrown by Molecular Beam Epitaxy," J.VAC.SCI.TECHNOL., Vol.A2, No.2, pp.436-440(1984) J.H.vander Merwe, "Crystal Interfaces.PartI.Semi-Infinite Crystals," J.APPL.PHYS.,Vol.34, No.1, pp.117-122(1963) J.M.Matthewsand A.E.Blakeslee, "Defects in Epitaxial MultilayersI.Misfit Dislocationsin Layers," J.CRYSTAL GROWTH, Vol.27, pp.118-125(1974) S.S.Iyeret al., "Heterojunction Bipolar Transistors Using Si-Ge Alloys," IEEETRANSACTIONS ON ELECTRON DEVICES, Vol.36, No.10(October 1989) R.H.M.vander Leur et al., "Critical Thickness for Pseudomorphic Growth of Si/GeAlloys and Superlattice," J.APPL.PHYS., Vol.64, No.5, pp.3043-3050ヘ゜ーシ゛(15 September 1988) D.C.Houghtonet al., "Equilibrium Critical Thickness for Si1-xGexStrained Layers on(100)Si," APPL.PHYS.LETT., Vol.56, No.5, pp.460-462(29January 1990)
Claims (28)
- コレクタ領域と、ベース領域と、外部ベース領域と、エミッタ領域とを含むヘテロ接合バイポーラ・トランジスタであって、前記ベース領域はSiGe含有層を含み、前記SiGe含有層は100nmを超えない厚さと前記厚さに関連する所定の臨界ゲルマニウム含有量とを有し、前記SiGe含有層は前記所定の臨界ゲルマニウム含有量の80%を下回らない平均ゲルマニウム含有量のゲルマニウム含有量プロファイルを有する、ヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層の前記ゲルマニウム含有量プロファイルは階段状又は傾斜状であり、前記SiGe含有層内の前記平均ゲルマニウム含有量は、前記層内の積分ゲルマニウム含有量を決定するために前記SiGe含有層全体にわたってゲルマニウム含有量を積分し、前記積分ゲルマニウム含有量を前記層の前記厚さで割ることによって決定される、請求項1に記載のヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層の前記平均ゲルマニウム含有量は前記所定の臨界ゲルマニウム含有量の90%を下回らない、請求項1に記載のヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層の前記平均ゲルマニウム含有量は前記所定の臨界ゲルマニウム含有量の95%を下回らない、請求項1に記載のヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層の前記平均ゲルマニウム含有量は前記所定の臨界ゲルマニウム含有量の99%を下回らない、請求項1に記載のヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層の前記平均ゲルマニウム含有量は前記所定の臨界ゲルマニウム含有量と実質的に等しい、請求項1に記載のヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層の前記所定の臨界ゲルマニウム含有量は10原子%を下回らない、請求項1に記載のヘテロ接合バイポーラ・トランジスタ。
- 前記SiGe含有層は50nmを超えない厚さを有し、前記SiGe含有層の前記所定の臨界ゲルマニウム含有量は17原子%を下回らない、請求項1に記載のへテロ接合バイポーラ・トランジスタ。
- 前記ベース領域は2つのエピタキシャル半導体層を含み、前記SiGe含有層は前記2つのエピタキシャル半導体層の間に挟まれている、請求項1に記載のへテロ接合バイポーラ・トランジスタ。
- 前記2つのエピタキシャル半導体層はいずれも原則としてシリコンからなる、請求項9に記載のへテロ接合バイポーラ・トランジスタ。
- 50nmを超えない厚さと、16.5原子%から17.5原子%の範囲の平均ゲルマニウム含有量のゲルマニウム含有量プロファイルとを有するSiGe含有ベース層を含む、へテロ接合バイポーラ・トランジスタ。
- 100nmを超えない厚さのSiGe含有ベース層を有するヘテロ接合バイポーラ・トランジスタにおいて、ベース層の準静的ドリフト電界を変化させることなくキャリア移動度を向上させる方法であって、
SiGe含有ベース層の厚さを測定するステップと、
前記SiGe含有ベース層の前記厚さに基づいて臨界ゲルマニウム含有量を計算するステップと、
前記SiGe含有ベース層のゲルマニウム含有量プロファイルを決定するために、前記SiGe含有ベース層内のゲルマニウム含有量を測定するステップと、
変化したゲルマニウム含有量プロファイルが前記計算された臨界ゲルマニウム含有量の80%を下回らない平均ゲルマニウム含有量を有するのに十分な量だけ、前記SiGe含有ベース層内の前記ゲルマニウム含有量を均一に増加させることによって、前記SiGe含有ベース層の前記ゲルマニウム含有量プロファイルを変化させるステップと、
を含む方法。 - 前記変化したゲルマニウム含有量プロファイルは前記計算された臨界ゲルマニウム含有量の90%を下回らない平均ゲルマニウム含有量を有する、請求項12に記載の方法。
- 前記変化したゲルマニウム含有量プロファイルは前記計算された臨界ゲルマニウム含有量の95%を下回らない平均ゲルマニウム含有量を有する、請求項12に記載の方法。
- 前記変化したゲルマニウム含有量プロファイルは前記計算された臨界ゲルマニウム含有量の99%を下回らない平均ゲルマニウム含有量を有する、請求項12に記載の方法。
- 前記変化したゲルマニウム含有量プロファイルは前記計算された臨界ゲルマニウム含有量と実質的に等しい平均ゲルマニウム含有量を有する、請求項12に記載の方法。
- 前記SiGe含有ベース層は傾斜状又は階段状のゲルマニウム含有量プロファイルを有し、前記平均ゲルマニウム含有量は、積分ゲルマニウム含有量を決定するために前記SiGe含有ベース層全体にわたってゲルマニウム含有量を積分し、前記積分ゲルマニウム含有量を前記SiGe含有層の前記厚さで割ることによって計算される、請求項12に記載の方法。
- 前記SiGe含有ベース層の前記計算された臨界ゲルマニウム含有量は10原子%を下回らない、請求項12に記載の方法。
- 前記SiGe含有ベース層は50nmを超えない厚さを有し、前記SiGe含有ベース層の前記計算された臨界ゲルマニウム含有量は17原子%を下回らない、請求項12に記載の方法。
- 前記へテロ接合バイポーラ・トランジスタは2つのエピタキシャル半導体層をさらに含み、前記SiGe含有ベース層は前記2つのエピタキシャル半導体層の間に挟まれている、請求項12に記載の方法。
- 前記SiGe含有ベース層内の前記ゲルマニウム含有量プロファイルの変化後も、前記2つのエピタキシャル半導体層のゲルマニウム含有量が同じままである、請求項20に記載の方法。
- 前記2つのエピタキシャル半導体層のゲルマニウム含有量が前記SiGe含有ベース層内の量と同じ量だけ均一に増加する、請求項20に記載の方法。
- SiGe含有ベース層を有するヘテロ接合バイポーラ・トランジスタを製造するための方法であって、
SiGeベースHBTデバイスのSiGe含有ベース層について推定厚さと推定ゲルマニウム・プロファイルとを決定するステップであって、前記推定厚さは100nmを超えない、ステップと、
前記推定厚さに基づいて臨界ゲルマニウム含有量を計算し、前記推定ゲルマニウム・プロファイルと前記臨界ゲルマニウム含有量とに基づいて平均ゲルマニウム含有量を計算するステップであって、前記平均ゲルマニウム含有量は前記臨界ゲルマニウム含有量の80%を下回らない、ステップと、
半導体基板内に前記SiGeベースHBTデバイスのためのコレクタを形成するステップと、
前記コレクタの上に、前記推定厚さと前記推定ゲルマニウム・プロファイルと前記計算された平均ゲルマニウム含有量とを有する前記SiGe含有ベース層を堆積させるステップと、
前記SiGeベースHBTデバイスのための外部ベースとエミッタとを形成するステップと、
を含む方法。 - 前記SiGe含有ベース層の前記平均ゲルマニウム含有量は前記計算された臨界ゲルマニウム含有量の95%を下回らない、請求項23に記載の方法。
- 前記SiGe含有ベース層の前記計算された臨界ゲルマニウム含有量は10原子%を下回らない、請求項23に記載の方法。
- 前記SiGe含有ベース層の前記推定厚さは50nmを超えず、前記SiGe含有ベース層の前記計算された臨界ゲルマニウム含有量は17原子%を下回らない、請求項23に記載の方法。
- 2つのエピタキシャル半導体層を堆積させるステップをさらに含み、前記SiGe含有ベース層は前記2つのエピタキシャル半導体層の間に挟まれている、請求項23に記載の方法。
- 前記2つのエピタキシャル半導体層はいずれも原則としてシリコンからなる、請求項27に記載の方法。
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| PCT/US2006/033582 WO2007025259A2 (en) | 2005-08-26 | 2006-08-25 | MOBILITY ENHANCEMENT IN SiGe HETEROJUNCTION BIPOLAR TRANSISTORS |
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| US20130313614A1 (en) * | 2012-05-22 | 2013-11-28 | Tsinghua University | METAL SILICIDE SELF-ALIGNED SiGe HETEROJUNCTION BIPOLAR TRANSISTOR AND METHOD OF FORMING THE SAME |
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| CN103441141B (zh) * | 2013-07-29 | 2016-08-10 | 北京工业大学 | 超宽温区高热稳定性微波功率SiGe异质结双极晶体管 |
| US9691898B2 (en) | 2013-12-19 | 2017-06-27 | Taiwan Semiconductor Manufacturing Co., Ltd. | Germanium profile for channel strain |
| US9287398B2 (en) | 2014-02-14 | 2016-03-15 | Taiwan Semiconductor Manufacturing Co., Ltd. | Transistor strain-inducing scheme |
| US9312370B2 (en) * | 2014-06-10 | 2016-04-12 | Globalfoundries Inc. | Bipolar transistor with extrinsic base region and methods of fabrication |
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- 2006-08-22 TW TW095130784A patent/TWI394275B/zh not_active IP Right Cessation
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- 2006-08-25 JP JP2008528237A patent/JP5400382B2/ja not_active Expired - Fee Related
- 2006-08-25 EP EP06813862A patent/EP1917682A4/en not_active Withdrawn
- 2006-08-25 KR KR1020087001903A patent/KR101020014B1/ko not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5400382B2 (ja) | 2014-01-29 |
| TWI394275B (zh) | 2013-04-21 |
| KR101020014B1 (ko) | 2011-03-09 |
| US20090224286A1 (en) | 2009-09-10 |
| EP1917682A4 (en) | 2009-09-30 |
| US20070045775A1 (en) | 2007-03-01 |
| CN101589460B (zh) | 2011-07-20 |
| EP1917682A2 (en) | 2008-05-07 |
| TW200729484A (en) | 2007-08-01 |
| US7544577B2 (en) | 2009-06-09 |
| JP2013141007A (ja) | 2013-07-18 |
| JP5607777B2 (ja) | 2014-10-15 |
| CN101589460A (zh) | 2009-11-25 |
| KR20080037659A (ko) | 2008-04-30 |
| WO2007025259A3 (en) | 2009-04-16 |
| WO2007025259A2 (en) | 2007-03-01 |
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