METHOD FOR MANUFACTURING SILICON CARBIDE SEMICONDUCTOR DEVICE
    23.
    发明申请
    METHOD FOR MANUFACTURING SILICON CARBIDE SEMICONDUCTOR DEVICE 有权
    制造碳化硅半导体器件的方法

    公开(公告)号:US20130137198A1

    公开(公告)日:2013-05-30

    申请号:US13686173

    申请日:2012-11-27

    IPC分类号: H01L21/66

    摘要: A method for manufacturing a silicon carbide semiconductor device includes the following steps. There is prepared a silicon carbide substrate having a first main surface and a second main surface. On the first main surface, an electrode is formed. The silicon carbide substrate has a hexagonal crystal structure. The first main surface has an off angle of ±8° or smaller relative to a {0001} plane. The first main surface has such a property that when irradiated with excitation light having energy equal to or greater than a band gap of silicon carbide, luminous regions in a wavelength range of 750 nm or greater are generated in the first main surface at a density of 1×104 cm−2 or smaller. In this way, a yield of a silicon carbide semiconductor device can be improved.

    摘要翻译: 一种制造碳化硅半导体器件的方法包括以下步骤。 制备具有第一主表面和第二主表面的碳化硅衬底。 在第一主表面上形成电极。 碳化硅衬底具有六方晶系结构。 第一主表面相对于{0001}平面具有±8°或更小的偏离角。 第一主表面具有这样的特性:当用能量等于或大于碳化硅带隙的激发光照射时,在第一主表面中以750nm或更大的波长范围产生发光区域,其密度为 1×104cm-2以下。 以这种方式,可以提高碳化硅半导体器件的产量。