JP2007096274A - 半導体ヘテロ構造、および半導体ヘテロ構造を形成する方法 - Google Patents
半導体ヘテロ構造、および半導体ヘテロ構造を形成する方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 38
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- 229910052710 silicon Inorganic materials 0.000 claims description 55
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 54
- 239000010703 silicon Substances 0.000 claims description 54
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 28
- 239000000203 mixture Substances 0.000 claims description 26
- 229910052732 germanium Inorganic materials 0.000 claims description 25
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 24
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 claims description 20
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Abstract
【解決手段】本発明は、第1の面内格子パラメータa1を有する基板を提供するステップと、第2の面内格子パラメータa2を有するバッファ層を設けるステップと、このバッファ層の上に上部層を設けるステップとを含む、半導体ヘテロ構造を形成する方法に関する。半導体へテロ構造の表面粗さを改善するために、バッファ層と上部層の間に追加層が設けられ、この追加層は、第1および第2の格子パラメータの間である第3の面内格子パラメータa3を有する。
【選択図】 図1
Description
Claims (23)
- 第1の面内格子パラメータa1を有する基板(2)を提供するステップと、
第2の面内格子パラメータa2を有するバッファ層(3)を設けるステップと、
前記バッファ層(3)の上に上部層(6)を設けるステップとを含む、半導体ヘテロ構造を形成する方法であって、
追加層(5)が前記バッファ層(3)と前記上部層(6)の間に設置され、前記追加層(5)が、前記第1および第2の格子パラメータa1とa2の間である第3の面内格子パラメータa3を有し、それによって前記上部層(6)の表面粗さを改善し、前記基板および前記バッファ層の前記各格子パラメータが、それぞれ緩和状態の格子パラメータ値に相当し、後続層に対する境界面での格子パラメータであることを特徴とする
方法。 - 前記追加層(5)および/または前記上部層(6)を、前記バッファ層(3)の成長温度よりも低い成長温度で成長させる、請求項1に記載の方法。
- 前記追加層(5)および/または前記上部層(6)の成長温度が、前記バッファ層(3)の成長温度よりも約50〜約500℃低くなるように選択される、請求項2に記載の方法。
- 前記追加層(5)の厚さが、それを超えると欠陥が発生する限界厚さ未満であり、具体的には1000Å未満、より具体的には約200〜800Åの厚さ、さらに具体的には約600Åの厚さである、請求項1〜3のいずれかに記載の方法。
- 前記バッファ層(3、13)および前記追加層(5)が、少なくとも2種の化合物AとBとを含み、互いに異なる組成A1−xa2Bxa2およびA1−xa3Bxa3を有する、請求項1〜4のいずれか一項に記載の方法。
- 組成の差Δx=xa2−xa3が約0.5〜8%、具体的には2〜5%、より具体的には2.5%である、請求項5に記載の方法。
- 前記上部層(6)が歪み層または緩和層であり、特に、シリコン(sSi)、シリコンゲルマニウム(Si1−xGex)、およびゲルマニウム(Ge)のうちの1つである、請求項1〜6のいずれか一項に記載の方法。
- 前記基板(12)がシリコンであり、および/または前記バッファ層(3、13)がシリコンゲルマニウム(Si1−xa2Gexa2)である、請求項1〜7のいずれか一項に記載の方法。
- 前記追加層(5)がシリコンゲルマニウム(Si1−xa3Gexa3)である、請求項1〜8のいずれか一項に記載の方法。
- 前記上部層(6)用に使用されるときのシリコンの成長温度が600℃未満に、具体的には550〜700℃未満になるように選択され、あるいは前記上部層(6)用に使用される場合のゲルマニウムの成長温度が500℃未満になるように選択される、請求項6〜10のいずれか一項に記載の方法。
- 第1の面内格子パラメータa1を有する基板(2)と、
第2の面内格子パラメータa2を有するバッファ層(3)と、
前記バッファ層(3)の上に上部層(6)とを備える、半導体ヘテロ構造であって、
追加層(5)が前記バッファ層(3)と前記上部層(6)の間にあり、前記追加層(5)が、前記第1と第2の格子パラメータの間である第3の面内格子パラメータa3を有し、前記各層の前記各格子パラメータが、それぞれ緩和状態の格子パラメータ値に相当し、後続層に対する境界面での格子パラメータであることを特徴とする、
半導体ヘテロ構造。 - 前記上部層(6)の表面粗さが1.8ÅRMS未満、具体的には1.5ÅRMS未満、より具体的には1.3ÅRMS未満である、請求項12に記載の半導体ヘテロ構造。
- 前記追加層(5)と前記上部層(6)の間の境界面での境界面粗さが2.5ÅRMS未満、具体的には2.0ÅRMS未満、より具体的には1.8ÅRMS未満である、請求項12または13に記載の半導体ヘテロ構造。
- 前記バッファ層(3)および前記追加層(5)が、少なくとも2種の化合物AとBとを含み、互いに異なる組成A1−xa2Bxa2およびA1−xa3Bxa3を有する、請求項12〜14のいずれか一項に記載の半導体ヘテロ構造。
- 組成の差Δx=xa2−xa3が約0.5〜8%、具体的には2〜5%、より具体的には2.5%である、請求項15に記載の半導体ヘテロ構造。
- 前記追加層(5)および/または前記上部層の厚さが、それを超えると欠陥が発生する限界厚さ未満であり、具体的には1000Å未満、より具体的には約200〜800Åの厚さ、さらに具体的には約600Åの厚さである、請求項12〜16のいずれか一項に記載の半導体ヘテロ構造。
- 前記基板(2、12)がシリコンであり、および/または前記バッファ層(3、13)がシリコンゲルマニウム(Si1−xa2Gexa2)であり、および/または前記上部層(5)が歪み層または緩和層であり、特に、歪みシリコン(sSi)、シリコンゲルマニウム(Si1−xGex)、およびゲルマニウム(Ge)のうちの1つであり、および/または前記追加層がシリコンゲルマニウム(Si1−xa3Gexa3)である、請求項12〜17のいずれか一項に記載の半導体ヘテロ構造。
- 請求項12〜18のいずれか一項に記載の半導体ヘテロ構造の、半導体デバイスの製作プロセス中での基板としての使用。
- 請求項12〜18のいずれか一項に記載の半導体ヘテロ構造の、歪み層オンインシュレータウェハ、特に歪みシリコンオンインシュレータウェハの製作プロセス中での使用。
- 前記製作プロセスがスマートカット式プロセスであり、請求項12〜18のいずれか一項に記載の半導体ヘテロ構造がドナー基板として使用される、請求項19に記載の半導体ヘテロ構造の使用。
- 請求項12〜18のいずれか一項に記載の半導体ヘテロ構造を備える半導体デバイス。
- ウェハ、特にSiウェハと、その一方の表面にあり、請求項12〜18のいずれか一項に記載の半導体ヘテロ構造から前記ウェハ上に移転された歪みSi層とを備え、前記上部層(6)が歪みシリコン層であり、前記歪みシリコン層(6)と前記追加層(5)の間の元からの埋込み境界面(7)がsSOIウェハの自由面に対応する、歪みシリコンオンインシュレータウェハ(sSOI)。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05291841.4 | 2005-09-07 | ||
EP05291841.4A EP1763069B1 (en) | 2005-09-07 | 2005-09-07 | Method for forming a semiconductor heterostructure |
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KR20190049448A (ko) * | 2017-10-30 | 2019-05-09 | 에이에스엠 아이피 홀딩 비.브이. | 반도체 구조를 형성하는 방법 및 이와 관련된 반도체 구조 |
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EP1763069B1 (en) | 2016-04-13 |
US7772127B2 (en) | 2010-08-10 |
JP4907256B2 (ja) | 2012-03-28 |
TWI343650B (en) | 2011-06-11 |
US20070051975A1 (en) | 2007-03-08 |
US20100264463A1 (en) | 2010-10-21 |
KR100832152B1 (ko) | 2008-05-27 |
TW200735348A (en) | 2007-09-16 |
US8084784B2 (en) | 2011-12-27 |
EP1763069A1 (en) | 2007-03-14 |
CN101140864B (zh) | 2011-03-02 |
CN101140864A (zh) | 2008-03-12 |
SG150571A1 (en) | 2009-03-30 |
SG131023A1 (en) | 2007-04-26 |
KR20070028234A (ko) | 2007-03-12 |
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