Patent ID: 8969103
Filing Date: 2015-03-03
Classification: H01L,Y10S

Abstract:
1. A method for manufacturing a silicon carbide substrate, comprising the steps of: preparing an ingot made of silicon carbide; obtaining a substrate from said ingot; first checking whether or not a normal line of at least one main surface of said substrate obtained and a normal line of a {03-38} plane form an angle of 0.5° or smaller in an orthogonal projection to a plane including a <01-10>direction and a <0001>direction; and second checking whether or not the normal line of said one main surface of said substrate obtained and the normal line of the {03-38} plane form an angle of 10° or smaller in an orthogonal projection to a plane including a <−2110>direction and the <0001>direction, the method further comprising: screening out the substrate for production if the step of first checking confirms that the angle is larger than 0.5° and if the step of second checking confirms that the angle is larger than 10°.