Abrupt
    4.
    发明申请
    Abrupt "delta-like" doping in Si and SiGe films by UHV-CVD 有权
    通过UHV-CVD在Si和SiGe薄膜中进行突变“三角形”掺杂

    公开(公告)号:US20060194422A1

    公开(公告)日:2006-08-31

    申请号:US11414091

    申请日:2006-04-28

    IPC分类号: H01L21/22 H01L21/38

    摘要: A structure and method of forming an abrupt doping profile is described incorporating a substrate, a first epitaxial layer of Ge less than the critical thickness having a P or As concentration greater than 5×1019 atoms/cc, and a second epitaxial layer having a change in concentration in its first 40 OE from the first layer of greater than 1×1019 P atoms/cc. Alternatively, a layer of SiGe having a Ge content greater than 0.5 may be selectively amorphized and recrystalized with respect to other layers in a layered structure. The invention overcomes the problem of forming abrupt phosphorus profiles in Si and SiGe layers or films in semiconductor structures such as CMOS, MODFET's, and HBT's.

    摘要翻译: 描述了形成突变掺杂分布的结构和方法,其结合基板,Ge的第一外延层Ge小于具有大于5×10 19原子/ cc的P或As浓度的临界厚度,以及 第二外延层在其第一层40 OE中的浓度随着大于1×10 19原子/ cc的第一层而变化。 或者,具有Ge含量大于0.5的SiGe层可以相对于分层结构中的其它层选择性地非晶化并重结晶。 本发明克服了在诸如CMOS,MODFET和HBT等半导体结构中的Si和SiGe层或膜中形成突变磷分布的问题。