Patent ID: 7910464
Filing Date: 2011-03-22
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising steps of: sequentially forming a III-V nitride semiconductor layer and a concave portion transfer film on a substrate; forming a first concave portion in said concave portion transfer film; and etching said concave portion transfer film by a predetermined depth using etching capable of etching said III-V nitride semiconductor layer and said concave portion transfer film, and thereby forming a second concave portion that has an equivalent shape to a shape of said first concave portion, below said first concave portion in said III-V nitride semiconductor layer, wherein said concave portion transfer film consists of an amorphous material, and the step of forming said first concave portion includes steps of: forming a first mask pattern that includes an opening portion in a region in which said first concave portion is formed, on said concave portion transfer film; and removing a part of said concave portion transfer film which part is exposed to the opening portion of said first mask pattern by a predetermined depth by isotropic etching.