Epitaxial growth of relaxed silicon germanium layers
    7.
    发明授权
    Epitaxial growth of relaxed silicon germanium layers 有权
    弛豫硅锗层的外延生长

    公开(公告)号:US07666799B2

    公开(公告)日:2010-02-23

    申请号:US12419251

    申请日:2009-04-06

    IPC分类号: H01L21/31

    摘要: A relaxed silicon germanium structure comprises a silicon buffer layer produced using a chemical vapor deposition process with an operational pressure greater than approximately 1 torr. The relaxed silicon germanium structure further comprises a silicon germanium layer deposited over the silicon buffer layer. The silicon germanium layer has less than about 107 threading dislocations per square centimeter. By depositing the silicon buffer layer at a reduced deposition rate, the overlying silicon germanium layer can be provided with a “crosshatch free” surface.

    摘要翻译: 松弛的硅锗结构包括使用具有大于约1托的操作压力的化学气相沉积工艺制备的硅缓冲层。 松弛的硅锗结构还包括沉积在硅缓冲层上的硅锗层。 硅锗层每平方厘米具有少于约107个穿透位错。 通过以降低的沉积速率沉积硅缓冲层,可以提供覆盖的硅锗层“无交叉阴极线”的表面。

    Epitaxial growth of relaxed silicon germanium layers
    8.
    发明授权
    Epitaxial growth of relaxed silicon germanium layers 有权
    弛豫硅锗层的外延生长

    公开(公告)号:US07514372B2

    公开(公告)日:2009-04-07

    申请号:US10898021

    申请日:2004-07-23

    IPC分类号: H01L21/31

    摘要: A relaxed silicon germanium structure comprises a silicon buffer layer produced using a chemical vapor deposition process with an operational pressure greater than approximately 1 torr. The relaxed silicon germanium structure further comprises a silicon germanium layer deposited over the silicon buffer layer. The silicon germanium layer has less than about 107 threading dislocations per square centimeter. By depositing the silicon buffer layer at a reduced deposition rate, the overlying silicon germanium layer can be provided with a “crosshatch free” surface.

    摘要翻译: 松弛的硅锗结构包括使用具有大于约1托的操作压力的化学气相沉积工艺制备的硅缓冲层。 松弛的硅锗结构还包括沉积在硅缓冲层上的硅锗层。 硅锗层每平方厘米具有少于约107个穿透位错。 通过以降低的沉积速率沉积硅缓冲层,可以提供覆盖的硅锗层“无交叉阴极线”的表面。

    Semiconductor buffer structures
    10.
    发明申请
    Semiconductor buffer structures 有权
    半导体缓冲结构

    公开(公告)号:US20070264801A1

    公开(公告)日:2007-11-15

    申请号:US11431336

    申请日:2006-05-09

    IPC分类号: H01L21/20

    摘要: Pile ups of threading dislocations in thick graded buffer layer are reduced by enhancing dislocation gliding. During formation of a graded SiGe buffer layer, deposition of SiGe from a silicon precursor and a germanium precursor is interrupted one or more times with periods in which the flow of the silicon precursor to the substrate is stopped while the flow of the germanium precursor to the substrate is maintained.

    摘要翻译: 通过增强位错滑行,减少厚度梯度缓冲层穿透位错的堆积。 在形成渐变的SiGe缓冲层期间,SiGe从硅前体和锗前体的沉积被中断一次或多次,其中停止向硅衬底的硅前体的流动,同时锗前体流向 保持底物。