Patent ID: 7504323
Filing Date: 2009-03-17
Classification: B82Y,C30B,H01L,H01S,Y10S

Abstract:
1. A method of making a GaN single crystal substrate in a growth apparatus including a reaction chamber, a gas introducing port, an exhaust port, a resistance heater, and a rotary support member, said method comprising: placing a GaN single crystal employed as a seed crystal on said rotary support member, the GaN single crystal having an n-type carrier concentration within a range of 1×10 forming an ingot of GaN single crystal by growing an epitaxial layer made of GaN on said GaN single crystal employed as said seed crystal, while said rotary support member is at a certain distance from said gas introducing port; and cutting said ingot into a plurality of GaN single crystal substrates, each GaN single crystal substrate having an n-type carrier concentration within a range of 1×10