Epitaxial growth of relaxed silicon germanium layers
    10.
    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。