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首页> 外文期刊>Journal of Crystal Growth >Growth kinetics of SiGe/Si superlattices on bulk and silicon-on-insulator substrates for multi-channel devices
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Growth kinetics of SiGe/Si superlattices on bulk and silicon-on-insulator substrates for multi-channel devices

机译:多通道器件的块状和绝缘体上硅衬底上SiGe / Si超晶格的生长动力学

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摘要

We have studied in reduced pressure chemical vapor deposition the growth kinetics of Si and Si_(0.8)Ge_(0.2) on bulk Si(001) and on silicon-on-insulator (145 nm buried oxide/20nm Si over-layer) substrates. For this, we have grown at 650℃, 20Torr 19 periods (Si_(0.8)Ge_(0.2) 19 nm/Si 32 nm) superlattices on both types of substrates that we have studied in secondary ion mass spectrometry, X-ray diffraction and cross-sectional transmission electron microscopy. The Si and SiGe growth rates together with the Ge content are steady on bulk Si(001), with mean values around 9.5nmmin~(-1) and 20.2%, respectively. In contrast, growth rates decrease from ~9.5nmmin~(-1) down to values around 7.0nmmin~(-1) (SiGe) and 6.3nmmin~(-1) (Si), when the deposited thickness on SOI increases from 0 up to slightly more than 100 nm. They then go back up to values around 8.8-9.0 nm min~(-1) as the thickness increases from 100 up to 400 nm. They then slowly decrease to values around 8.4-8.6 nmmin~(-1) as the thickness increases from 400 up to 800 nm. The Ge concentration follows on SOI exactly the opposite trend: an increase from 19.9% (0 nm) up to 20.6% (~100 nm) followed by a decrease to values around 20.1% (400 nm) then a slow re-increase up to 20.4% (800 nm). These fluctuations are most likely due to the following SOI surface temperature variations: from 650℃down to 638℃ (l00nm), back up to 648 C (400 nm) followed by a slow decrease to 646℃ (800 nm). These data curves will be most useful to grow on conventional SOI substrates large number of periods, regular Si/Si_(0.8)Ge_(0.2) superlattices that will serve as the core of multi-channel or three-dimensional nano-wires field effect transistors.
机译:我们已经在减压化学气相沉积中研究了Si和Si_(0.8)Ge_(0.2)在块体Si(001)和绝缘体上硅(145 nm埋入氧化物/ 20nm Si覆盖层)衬底上的生长动力学。为此,我们在二次离子质谱,X射线衍射和X射线衍射研究的两种类型的衬底上均在650℃,20Torr 19周期(Si_(0.8)Ge_(0.2)19 nm / Si 32 nm)超晶格上生长。截面透射电子显微镜。在块状Si(001)上,Si和SiGe的生长速率以及Ge含量稳定,平均值分别约为9.5nmmin〜(-1)和20.2%。相反,当SOI上的沉积厚度从0增加时,生长速率从〜9.5nmmin〜(-1)下降到7.0nmmin〜(-1)(SiGe)和6.3nmmin〜(-1)(Si)左右。直至略大于100 nm。然后,随着厚度从100纳米增加到400纳米,它们返回到大约8.8-9.0 nm min〜(-1)左右的值。然后随着厚度从400增大到800 nm,它们逐渐减小到8.4-8.6 nmmin〜(-1)左右的值。 Ge浓度遵循SOI的趋势完全相反:从19.9%(0 nm)增加到20.6%(〜100 nm),然后降低到20.1%(400 nm)附近,然后缓慢增加直到20.4%(800纳米)。这些波动最可能归因于以下SOI表面温度变化:从650℃降至638℃(100nm),回升至648 C(400 nm),然后缓慢降至646℃(800 nm)。这些数据曲线对于在常规SOI衬底上生长大量周期,规则的Si / Si_(0.8)Ge_(0.2)超晶格将最有用,它将用作多通道或三维纳米线场效应晶体管的核心。

著录项

  • 来源
    《Journal of Crystal Growth》 |2009年第11期|3152-3157|共6页
  • 作者单位

    CEA-LETI, MINATEC, 17, Avenue des Martyrs, 38054 Grenoble Cedex 9, France;

    CEA-LETI, MINATEC, 17, Avenue des Martyrs, 38054 Grenoble Cedex 9, France;

    CEA-LETI, MINATEC, 17, Avenue des Martyrs, 38054 Grenoble Cedex 9, France;

    CEA-LETI, MINATEC, 17, Avenue des Martyrs, 38054 Grenoble Cedex 9, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A3. Chemical vapor deposition processes; B1. Germanium silicon alloys;

    机译:A3。化学气相沉积工艺;B1。锗硅合金;

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