Patent ID: 8871647
Filing Date: 2014-10-28
Classification: C30B,H01L

Abstract:
1. A method for manufacturing a surface-treated group III nitride substrate, comprising: dry etching a surface of the substrate using a mixed gas that contains a first gas including carbon and a second gas including chlorine, in a chamber, wherein a pressure P (Pa), a flow rate Q (sccm) of the mixed gas, and a chamber volume V (l: liters) satisfy and a flow ratio between the first gas and the second gas is from 1:9 to 9:1; and polishing the surface of the substrate using a polishing apparatus in which a solution containing an oxide of a p-type metal element and having a viscosity ranging from 2 (mPa·s) to 30 (mPa·s) is supplied as a slurry, to bond the p-type metal element to the surface of the substrate.