Patent ID: 7531396
Filing Date: 2009-05-12
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, which includes a semiconductor body of a first conductivity type; a hetero semiconductor region adjacent to one main surface of the semiconductor body and having a band gap different from that of the semiconductor body; a gate electrode formed in a junction portion between the hetero semiconductor region and the semiconductor body through a gate insulating film; a source electrode connected to the hetero semiconductor region; and a drain electrode ohmic-connected to the semiconductor body, the method comprises: a first process of forming a predetermined trench by using a mask layer having a predetermined opening on one main surface side of the semiconductor body; a second process of forming the gate insulating film adjacent to at least a side wall of the trench; a third process of forming the gate electrode adjacent to the gate insulating film; a fourth process of forming a hetero semiconductor layer on the semiconductor body and the gate electrode through an interlayer insulating film; and a fifth process of forming the hetero semiconductor region by patterning the hetero semiconductor layer.