Patent ID: 7227189

Claim:
A nitride semiconductor device comprising: a base body having a principal plane; a nitride semiconductor layer on the base body having a pyramid shape including a tilt plane, the tilt plane including an S-plane, wherein said nitride semiconductor layer having a first portion and a second portion formed on the base body by selective growth wherein the first portion is selectively grown with a first amount of source material over a first area along a plane substantially parallel to the principal plane of the base body during a first time period, wherein the second portion is selectively grown with a second amount of source material over a second area along the plane substantially parallel to the principal plane during a second time period, and wherein the second area is equal to or less than the first area and the second amount of source material is equal to or less than the first amount of source material; and a p-side electrode formed on an upper portion of the nitride semiconductor layer, wherein an active layer is provided on the tilt plane of the nitride semiconductor layer, said tilt plane being not parallel to the principal plane of the base body.