EMBEDDED SILICON GERMANIUM USING A DOUBLE BURIED OXIDE SILICON-ON-INSULATOR WAFER
    9.
    发明申请
    EMBEDDED SILICON GERMANIUM USING A DOUBLE BURIED OXIDE SILICON-ON-INSULATOR WAFER 有权
    嵌入式硅胶锗,使用双层氧化硅绝缘体

    公开(公告)号:US20060255330A1

    公开(公告)日:2006-11-16

    申请号:US10908394

    申请日:2005-05-10

    IPC分类号: H01L27/12 H01L29/06

    摘要: Disclosed is a p-type field effect transistor (pFET) structure and method of forming the pFET. The pFET comprises embedded silicon germanium in the source/drain regions to increase longitudinal stress on the p-channel and, thereby, enhance transistor performance. Increased stress is achieved by increasing the depth of the source/drain regions and, thereby, the volume of the embedded silicon germanium. The greater depth (e.g., up to 100 nm) of the stressed silicon germanium source/drain regions is achieved by using a double BOX SOI wafer. Trenches are etched through a first silicon layer and first buried oxide layer and then the stressed silicon germanium is epitaxially grown from a second silicon layer. A second buried oxide layer isolates the pFET.

    摘要翻译: 公开了一种形成pFET的p型场效应晶体管(pFET)结构和方法。 pFET在源极/漏极区域中包括嵌入的硅锗以增加p沟道上的纵向应力,从而增强晶体管的性能。 通过增加源极/漏极区域的深度,从而增加嵌入式硅锗的体积来实现增加的应力。 通过使用双BOX SOI晶片来实现应力硅锗源极/漏极区域的更大的深度(例如高达100nm)。 通过第一硅层和第一掩埋氧化物层蚀刻沟槽,然后从第二硅层外延生长受应力的硅锗。 第二掩埋氧化物层隔离pFET。