Patent ID: 6362515
Filing Date: 2002-03-26
Classification: B82Y,H01L,H01S

Abstract:
A GaN substrate comprising:a substrate; a first GaN layer being formed over said substrate, and including a plurality of stripe portions which form at least one first groove between adjacent ones of said plurality of stripe portions; a second GaN layer formed over said substrate and said first GaN layer; a first preventing means, arranged at upper surfaces of said plurality of stripe portions, for preventing crystal growth of a GaN layer in a vertical up direction from the upper surfaces of said plurality of stripe portions; and a second preventing means, arranged at at least one bottom of said at least one first groove, for preventing crystal growth of a GaN layer in a vertical up direction from said at least one bottom, wherein a width of said groove is wider than a width of each of said plurality of stripe portions, such that a ratio between the width of said stripe portions and the width of said groove is less than 1.