Epitaxial growth of relaxed silicon germanium layers
    1.
    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
    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: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。

    Apparatus and method for depositing silicon germanium films
    8.
    发明申请
    Apparatus and method for depositing silicon germanium films 审中-公开
    用于沉积硅锗膜的装置和方法

    公开(公告)号:US20070155138A1

    公开(公告)日:2007-07-05

    申请号:US11439688

    申请日:2006-05-23

    IPC分类号: H01L21/20 H01L21/36 H01L31/20

    摘要: A new model is provided for the CVD growth of silicon germanium from silicon-containing and germanium-containing precursors. According to the new model, the germanium concentration x is related to the gas phase ratio according to the equation [x/(1−x)]2=mPGe/PSi, and m=Ae−E/(RT), where PSi is the partial pressure of the silicon-containing precursor, PGe is the partial pressure of the germanium-containing precursor, A is a constant, R is the universal gas constant, and T is the temperature. Methods and apparatuses are described for controlling CVD process parameters, associated with a series of reactions at constant or varied temperature, to achieve targeted germanium concentrations in silicon germanium films deposited onto semiconductor substrates. In particular, the new model can be used to calculate the resultant germanium concentration for selected precursor flow rates. The new model can also be used to control a precursor injection apparatus to achieve a desired germanium concentration.

    摘要翻译: 提供了一种新型号,用于从含硅和含锗前体制备硅锗。 根据新模型,根据等式[x /(1-x)],锗浓度x与气相比有关。 其中P 是含硅前体的分压,P < 含锗前体的分压为A,常数为R,通用气体常数为T,温度为T。 描述了用于控制与在恒定或变化的温度下的一系列反应相关联的CVD工艺参数以实现沉积在半导体衬底上的硅锗膜中的目标锗浓度的方法和装置。 特别地,新模型可用于计算所选择的前体流速的锗浓度。 新模型也可用于控制前体注入装置以实现所需的锗浓度。