Patent ID: 7531397
Filing Date: 2009-05-12
Classification: C30B,H01L,H01S

Abstract:
1. A method for growing a semiconductor substrate, comprising: preparing a GaN substrate having a surface bidirectionally inclined from a {0001} crystal plane by two specified off-angles with respect to two crystal axis directions, respectively, such that an orientation of the surface is defined by a first absolute value of a first off-angle of the surface from the {0001} crystal plane towards <1-100> direction, the first absolute value is equal to or larger than 0.12 degree and equal to or smaller than 0.35 degree and by a second absolute value of a second off-angle of the surface from the {0001} crystal plane towards <11-20> direction, the second absolute value is larger than 0.00 degree and equal to or smaller than 0.06 degree; and epitaxially growing a single-crystal layer of III-V nitride compound semiconductor on the surface of the GaN substrate.