JP5144002B2 - 減少した転位パイルアップを有する半導体ヘテロ構造および関連した方法 - Google Patents
減少した転位パイルアップを有する半導体ヘテロ構造および関連した方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 143
- 238000000034 method Methods 0.000 title claims description 43
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- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 239000002243 precursor Substances 0.000 description 5
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- 238000000038 ultrahigh vacuum chemical vapour deposition Methods 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
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- WYWJANKLUUWRBD-UHFFFAOYSA-J Cl(=O)[O-].Cl(=O)[O-].Cl(=O)[O-].Cl(=O)[O-].[Si+4] Chemical compound Cl(=O)[O-].Cl(=O)[O-].Cl(=O)[O-].Cl(=O)[O-].[Si+4] WYWJANKLUUWRBD-UHFFFAOYSA-J 0.000 description 1
- 229910005540 GaP Inorganic materials 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
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- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- KXNLCSXBJCPWGL-UHFFFAOYSA-N [Ga].[As].[In] Chemical compound [Ga].[As].[In] KXNLCSXBJCPWGL-UHFFFAOYSA-N 0.000 description 1
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- RPPBZEBXAAZZJH-UHFFFAOYSA-N cadmium telluride Chemical compound [Te]=[Cd] RPPBZEBXAAZZJH-UHFFFAOYSA-N 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
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- 238000012512 characterization method Methods 0.000 description 1
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- OXTURSYJKMYFLT-UHFFFAOYSA-N dichlorogermane Chemical compound Cl[GeH2]Cl OXTURSYJKMYFLT-UHFFFAOYSA-N 0.000 description 1
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- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- HZXMRANICFIONG-UHFFFAOYSA-N gallium phosphide Chemical compound [Ga]#P HZXMRANICFIONG-UHFFFAOYSA-N 0.000 description 1
- 229910000078 germane Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
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- VCEXCCILEWFFBG-UHFFFAOYSA-N mercury telluride Chemical compound [Hg]=[Te] VCEXCCILEWFFBG-UHFFFAOYSA-N 0.000 description 1
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- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
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- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 description 1
- 239000005052 trichlorosilane Substances 0.000 description 1
- VEDJZFSRVVQBIL-UHFFFAOYSA-N trisilane Chemical compound [SiH3][SiH2][SiH3] VEDJZFSRVVQBIL-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
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Description
本出願は、2002年8月23日に出願された米国仮出願第60/405,484の利益および優先権を主張する。
マイクロ電子デバイスの増加する動作速度および演算能力は、最近これらのマイクロ電子デバイスにおいてスタート基板として用いられる半導体構造の複雑性および機能性における増加に対する必要性を招いた。シリコンおよびゲルマニウムに基づくこれらの「仮想基板」は、バルクSi基板の上に製造されるデバイスと比較されたとき、高められた性能を示す超大規模集積回路「VLSI」デバイスの新たな生成に対するプラットフォームを提供する。詳細には、新たな技術的進歩は、シリコン−ゲルマニウム合金(以下、「SiGe」または「Si1−XGEX」と称す)を用いるヘテロ構造の形成が、電子および正孔移動度を増加するSiの原子構造を変更することによって半導体デバイスの性能をさらに高めることを可能にする。
ここで、Tcritの単位は、ナノメートル(nm)である。
Claims (42)
- 半導体基板の表面の上に位置する少なくとも部分的に緩和したシード層と、
該シード層の表面の上に位置する組成的に均一なキャップ層であって、該キャップ層は、実質的に緩和している、組成的に均一なキャップ層と、
該組成的に均一なキャップ層と該シード層との間に位置する組成的に均一なバッファ層と
を含み、
該半導体基板、該シード層、該バッファ層、該組成的に均一なキャップ層のそれぞれは、Si、GeまたはSiGeのうちのいずれかを含み、
該バッファ層および該シード層の少なくとも1つは、シリコンおよびゲルマニウムを含み、
該バッファ層におけるゲルマニウムの濃度は、該シード層と該バッファ層との間の界面での該シード層におけるゲルマニウムの濃度とは異なり、
該組成的に均一なキャップ層の格子定数は、該シード層の格子定数とは異なる、半導体構造。 - 前記組成的に均一なキャップ層の上に位置する歪んだ半導体層をさらに含む、請求項1に記載の半導体構造。
- 前記歪んだ半導体層は、引張られ歪んでいる、請求項2に記載の半導体構造。
- 前記歪んだ半導体層は、圧縮され歪んでいる、請求項2に記載の半導体構造。
- 前記組成的に均一なキャップ層は、シリコンおよびゲルマニウムの少なくとも1つを含む、請求項1に記載の半導体構造。
- 前記組成的に均一なキャップ層の厚さは、0.5μm〜3.0μmの範囲にわたる、請求項1に記載の半導体構造。
- 前記組成的に均一なキャップ層と前記バッファ層との間に位置する組成的に勾配した層をさらに含む、請求項1に記載の半導体構造。
- 前記組成的に勾配した層は、II族要素、III族要素、IV族要素、V族要素およびVI族要素の少なくとも1つを含む、請求項7に記載の半導体構造。
- 前記組成的に勾配した層は、シリコンおよびゲルマニウムを含む、請求項8に記載の半導体構造。
- 前記組成的に勾配した層は、5%Ge/μmより大きい勾配率を有する、請求項9に記載の半導体構造。
- 前記組成的に勾配した層は、50%Ge/μmより小さい勾配率を有する、請求項10に記載の半導体構造。
- 前記組成的に勾配した層は、10%Geより大きい濃度に勾配される、請求項9に記載の半導体構造。
- 前記組成的に勾配した層の厚さは、0.5μm〜10.0μmの範囲にわたる、請求項7に記載の半導体構造。
- 前記組成的に勾配した層は、初期の勾配した層を含み、該初期の勾配した層は、前記組成的に勾配した層の他の部分より低い局部勾配率を有する、請求項7に記載の半導体構造。
- 前記組成的に勾配した層は、シリコンおよびゲルマニウムの少なくとも1つを含む、請求項14に記載の半導体構造。
- 前記局部勾配率における差異は、5%Ge/μmより大きい、請求項15に記載の半導体構造。
- 前記初期の勾配した層の勾配率は、10%Ge/μmを超えない、請求項15に記載の半導体構造。
- 前記初期の勾配した層と前記組成的に勾配した層の他の部分との間の界面でのGe含量における不連続性は、10%Geを超えない、請求項15に記載の半導体構造。
- 前記初期の勾配した層と前記組成的に勾配した層の他の部分との間の界面でのGe含量における不連続性は、5%Geを超えない、請求項18に記載の半導体構造。
- 前記シード層は、組成的に均一である、請求項1または8に記載の半導体構造。
- 前記シード層の厚さは、その平衡臨界厚さの2倍より大きい、請求項1に記載の半導体構造。
- 前記シード層の厚さは、その平衡臨界厚さの5倍より小さい、請求項21に記載の半導体構造。
- 前記シード層は、10nm〜1000nmの範囲にわたる厚さを有する、請求項1に記載の半導体構造。
- 前記キャップ層は、1/cmより小さい転位パイルアップの密度を有する、請求項1に記載の半導体構造。
- 前記キャップ層は、5×105/cm2より小さいスレッディング転位密度を有する、請求項1に記載の半導体構造。
- 前記シード層と前記バッファ層との界面でのGe濃度における不連続性は、2%〜50%Geの範囲にわたる、請求項1に記載の半導体構造。
- 前記シード層と前記バッファ層との界面でのGe濃度における不連続性は、10%Geを含む、請求項26に記載の半導体構造。
- 前記組成的に勾配した層および前記シード層の少なくとも1つは、シリコンおよびゲルマニウムの少なくとも1つを含む、請求項8に記載の半導体構造。
- 前記バッファ層と前記組成的に勾配した層との間の界面での該組成的に勾配した層におけるゲルマニウムの濃度は、該バッファ層におけるゲルマニウムの濃度と同じである、請求項1に記載の半導体構造。
- 前記半導体基板は、silicon―on―insulator基板を含む、請求項1に記載の半導体構造。
- 減少したスレッディング転位パイルアップを有する半導体構造を製造する方法であって、該方法は、
半導体基板の表面の上に少なくとも部分的に緩和したシード層を提供するステップと、
該シード層の上に組成的に均一なバッファ層を形成するステップと、
該バッファ層の上に組成的に均一なキャップ層を形成するステップであって、該キャップ層は、実質的に緩和しており、該シード層は、少なくとも該キャップ層内に転位パイルアップを形成することを抑制する、ステップと
を包含し、
該半導体基板、該シード層、該バッファ層、該組成的に均一なキャップ層のそれぞれは、Si、GeまたはSiGeのうちのいずれかを含み、
該バッファ層および該シード層の少なくとも1つは、シリコンおよびゲルマニウムを含み、
該バッファ層におけるゲルマニウムの濃度は、該シード層と該バッファ層との間の界面での該シード層におけるゲルマニウムの濃度とは異なり、
該組成的に均一なキャップ層の格子定数は、該シード層の格子定数とは異なる、方法。 - 前記少なくとも部分的に緩和したシード層を形成するステップは、該シード層の平衡臨界厚さの2倍〜5倍の範囲にわたる厚さに該シード層を成長させることを包含する、請求項31に記載の方法。
- 前記少なくとも部分的に緩和したシード層を形成するステップは、該シード層の堆積温度より大きい温度で該シード層をアニールすることを包含する、請求項31に記載の方法。
- 前記部分的に緩和したシード層の少なくとも一部分は、850℃を超える成長温度における成長によって形成される、請求項31に記載の方法。
- 前記シード層を提供するステップの前に、前記半導体基板に種を埋め込むことにより、該半導体基板にスレッディング転位を形成するステップをさらに包含する、請求項31に記載の方法。
- 前記半導体基板は、シリコンを包含し、前記種は、シリコンを包含する、請求項35に記載の方法。
- 前記半導体基板は、semiconductor―on―insulator基板を包含する、請求項31に記載の方法。
- 前記半導体基板は、シリコン基板を包含する、請求項31に記載の方法。
- 前記半導体基板は、102/cm2を超えるスレッディング転位の密度を有するシリコン基板を包含する、請求項31に記載の方法。
- 前記半導体基板は、1Åより大きい平均表面粗さを有するシリコン基板を包含する、請求項31に記載の方法。
- 前記キャップ層は、1/cmより小さい転位パイルアップの密度を有する、請求項31に記載の方法。
- 前記バッファ層を形成するステップと、前記キャップ層を形成するステップとの間に、組成的に勾配した層を形成するステップをさらに包含する、請求項31に記載の方法。
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US20120104461A1 (en) | 2012-05-03 |
JP2005536876A (ja) | 2005-12-02 |
US20040075105A1 (en) | 2004-04-22 |
EP2267762A3 (en) | 2012-08-22 |
US20140338589A1 (en) | 2014-11-20 |
US7368308B2 (en) | 2008-05-06 |
US7375385B2 (en) | 2008-05-20 |
US20060009012A1 (en) | 2006-01-12 |
EP1530800B1 (en) | 2016-12-14 |
JP5491351B2 (ja) | 2014-05-14 |
US9934964B2 (en) | 2018-04-03 |
US20110012172A1 (en) | 2011-01-20 |
US20040087117A1 (en) | 2004-05-06 |
JP2014075585A (ja) | 2014-04-24 |
US7829442B2 (en) | 2010-11-09 |
JP5639248B2 (ja) | 2014-12-10 |
WO2004019391A2 (en) | 2004-03-04 |
WO2004019391A3 (en) | 2004-12-02 |
JP2011018946A (ja) | 2011-01-27 |
US20160225609A1 (en) | 2016-08-04 |
US7049627B2 (en) | 2006-05-23 |
EP1530800A2 (en) | 2005-05-18 |
EP2267762A2 (en) | 2010-12-29 |
US8823056B2 (en) | 2014-09-02 |
US8129747B2 (en) | 2012-03-06 |
US9309607B2 (en) | 2016-04-12 |
US20080079024A1 (en) | 2008-04-03 |
AU2003274922A1 (en) | 2004-03-11 |
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