Invention Grant
US08795624B2 Monocrystalline silicon carbide ingot, monocrystalline silicon carbide wafer and method of manufacturing the same 有权
单晶碳化硅锭,单晶碳化硅晶圆及其制造方法相同

Monocrystalline silicon carbide ingot, monocrystalline silicon carbide wafer and method of manufacturing the same
Abstract:
Provided is a monocrystalline silicon carbide ingot containing a dopant element, wherein a maximum concentration of the dopant element is less than 5×1017 atoms/cm3 and the maximum concentration is 50 times or less than that of a minimum concentration of the dopant element. Also provided is a monocrystalline silicon carbide wafer made by cutting and polishing the monocrystalline silicon carbide ingot, wherein a electric resistivity at room temperature of the wafer is 5×103 Ωcm or more. Further provided is a method for manufacturing the monocrystalline silicon carbide including growing the monocrystalline silicon carbide on a seed crystal from a sublimation material by a sublimation method. The sublimation material includes a solid material containing a dopant element, and the specific surface of the solid material containing the dopant element is 0.5 m2/g or less.
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