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。

    METHODS OF SELECTIVELY DEPOSITING SILICON-CONTAINING FILMS
    7.
    发明申请
    METHODS OF SELECTIVELY DEPOSITING SILICON-CONTAINING FILMS 有权
    选择性沉积含硅膜的方法

    公开(公告)号:US20090117717A1

    公开(公告)日:2009-05-07

    申请号:US11935174

    申请日:2007-11-05

    IPC分类号: H01L21/36 H01L21/306

    摘要: An embodiment provides a method for selectively depositing a single crystalline film. The method includes providing a substrate, which includes a first surface having a first surface morphology and a second surface having a second surface morphology different from the first surface morphology. A silicon precursor and BCl3 are intermixed to thereby form a feed gas. The feed gas is introduced to the substrate under chemical vapor deposition conditions. A Si-containing layer is selectively deposited onto the first surface without depositing on the second surface by introducing the feed gas.

    摘要翻译: 一个实施方案提供了选择性沉积单晶膜的方法。 该方法包括提供基底,其包括具有第一表面形态的第一表面和具有不同于第一表面形态的第二表面形态的第二表面。 将硅前体和BCl 3混合,从而形成进料气体。 在化学气相沉积条件下将进料气体引入基板。 通过引入进料气体,在第一表面上选择性地沉积含Si层而不沉积在第二表面上。

    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
    9.
    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。

    Apparatus and method for depositing silicon germanium films
    10.
    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。