Patent ID: 9129808
Filing Date: 2015-09-08
Classification: B82Y,C30B,H01L,Y02E,Y02P

Abstract:
1. A method for producing an epitaxial wafer including a substrate composed of a III-V compound semiconductor and an epitaxial layer structure that is composed of a III-V compound semiconductor, includes a diffusive-concentration-distribution-adjusting layer and a window layer, and is disposed on the substrate, the method comprising: a step of growing an antimony-containing layer on the substrate by metal-organic vapor phase epitaxy using only metal-organic sources; and a step of growing, on the antimony-containing layer, an antimony-free layer including the diffusive-concentration-distribution-adjusting layer and the window layer, wherein, from the growth of the antimony-containing layer to completion of the growth of the window layer, the growth is performed at a growth temperature of 425° C. or more and 525° C. or less, wherein the substrate is an InP substrate; an InP window layer is grown as the window layer; and, from initiation of the growth of the antimony-containing layer to completion of the growth of the InP window layer, the growth is continuously performed in the same growth chamber by the metal-organic vapor epitaxy using only metal-organic sources such that an interface formed between the diffusive-concentration-distribution-adjusting layer and the InP window layer has an oxygen concentration and a carbon concentration that are less than 1×10