Patent ID: 6503769
Filing Date: 2003-01-07
Classification: H01L,H01S

Abstract:
A method for fabricating a semiconductor device, comprising the steps of:forming a multi-layer structure on a substrate; forming a first-conductive-type etch stop layer of a III nitride having an Al molar fraction of 0.2 or more on the multi-layer structure; forming a second-conductive-type current blocking layer of a III nitride having an Al molar fraction which is smaller than that of the etch stop layer by 0.1 on the etch stop layer, a molar fraction of Al being lower in a composition of the III nitride included in the current blocking layer than in a composition of the III nitride included in the etch stop layer, wherein both the first-conductive-type etch stop layer and the current blocking layer include Al; and selectively removing at least a portion of the current blocking layer by vapor etching.