Patent ID: 9698310
Date: 2017-07-04
CPC Classifications: H01L

Claim:
1. A method for producing a semiconductor device having a transparent electrode on and in contact with a Group III nitride semiconductor layer, the method comprising: forming the transparent electrode consisting of Zinc-doped Indium Oxide (IZO) on the Group III nitride semiconductor layer; performing heat treatment at a first temperature by at least one of indirect resistance heating and infrared heating under an atmosphere containing nitrogen in a normal atmospheric pressure or a reduced pressure after the formation of the transparent electrode to crystallize the transparent electrode; reducing a strain between the semiconductor layer and the transparent electrode by microwave heating under an atmosphere containing nitrogen at a second temperature after the heat treatment; and performing another heat treatment at a third temperature by at least one of indirect resistance heating and infrared heating under an atmosphere containing oxygen to further crystallize the transparent electrode after the microwave heating, wherein the microwave heating is performed at a second temperature in a range of 100° C. to 350° C. and lower than the first temperature.