Patent ID: 8890291
Filing Date: 2014-11-18
Classification: C30B,H01L,Y10S

Abstract:
1. A method of manufacturing a silicon epitaxial wafer which is provided to a semiconductor device manufacturing process having a thermal treatment process of which the highest temperature ranges from 1050° C. to the melting point of silicon and of which the temperature rising and falling rate ranges from 150° C./sec to 10000° C./sec, the method comprising: an epitaxial process to cause an epitaxial layer to grow on the surface of a substrate, which is doped with boron so as to have resistivity of 0.02 Ωcm to 0.001 Ωcm and of which the initial oxygen concentration Oi is in the range of 11.0×10 wherein the thermal treatment process is applied to only an outermost surface layer of the silicon epitaxial wafer, the oxygen precipitates density is equal to or less than 5×10 an oxygen precipitation nuclei dissolution process is not performed before the epitaxial process, and wherein the wafer includes a front surface and a back surface, both having a flat main surface, a front sloped chamfered portion having an angle θ