Patent ID: 6737288
Filing Date: 2004-05-18
Classification: H01L

Abstract:
A method for fabricating a semiconductor device comprising:on a heterojunction structure including a first semiconductor layer, forming a second semiconductor layer that has a band gap energy smaller than the first semiconductor layer, and a higher valence band energy than that of the first semiconductor layer; forming a metal film on a surface of the second semiconductor layer and outside a first portion of the second semiconductor layer where the second semiconductor layer is to be removed; forming a mask pattern covering the metal film and exposing the first portion of the second semiconductor layer exposed, and selectively removing the second semiconductor layer by etching, while irradiating the second semiconductor layer with light, with a solution having a Fermi level higher than that of the second semiconductor layer, selective removal of the second semiconductor layer substantially stopping at the first semiconductor layer while irradiating the first and second semiconductor layers with light.