SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF SAME
    2.
    发明申请
    SEMICONDUCTOR DEVICE AND MANUFACTURING METHOD OF SAME 有权
    半导体器件及其制造方法

    公开(公告)号:US20140145239A1

    公开(公告)日:2014-05-29

    申请号:US14086301

    申请日:2013-11-21

    IPC分类号: H01L29/66 H01L29/739

    摘要: A manufacturing method for a semiconductor device including a drift layer; a body layer contacting a front surface of the drift layer; an emitter layer provided on a portion of a front surface of the body layer and exposed on the front surface of the substrate; a buffer layer contacting a back surface of the drift layer; a collector layer contacting a back surface of the buffer layer and exposed on a back surface of the substrate; and a gate electrode facing, via an insulator, the body layer in an area where the body layer separates the emitter layer from the drift layer, includes preparing a wafer that includes a first layer, and a second layer layered on a back surface of the first layer and having a higher polycrystalline silicon concentration than the first layer, and forming the buffer layer by implanting and diffusing ions in the second layer.

    摘要翻译: 一种包括漂移层的半导体器件的制造方法; 接触漂移层前表面的体层; 发射极层,设置在所述主体层的前表面的一部分上,并暴露在所述基板的前表面上; 接触漂移层的背面的缓冲层; 与所述缓冲层的背面接触并暴露在所述基板的背面上的集电体层; 以及栅极电极,其通过绝缘体面对主体层将发射极层与漂移层分离的区域中的主体层,包括准备包括第一层的晶片和层叠在第二层的背面上的第二层 第一层并且具有比第一层更高的多晶硅浓度,以及通过在第二层中注入和扩散离子形成缓冲层。