Patent ID: 6379985
Filing Date: 2002-04-30
Classification: H01L,H01S

Abstract:
A method for cleaving at least one III-V nitride layer of a semiconductor structure formed on a c-face sapphire substrate, comprising:forming a semiconductor structure comprising at least one III-V nitride layer on a top c-face of a c-face sapphire substrate, the c-face sapphire substrate including a bottom c-face and an edge between the top c-face and bottom c-face; forming a line of weakness on the bottom c-face of the c-face sapphire substrate along at least substantially the length of a line that (i) extends in an a-plane direction of the c-face sapphire substrate and (ii) extends from one portion of the edge of the c-face sapphire substrate to another portion of the edge; and applying a force to the bottom c-face of the c-face sapphire substrate to cleave the c-face sapphire substrate along the line of weakness in the a-plane direction and to form a cleaved facet along an m-plane of the at least one III-V nitride layer.