Patent ID: 7332366

Claim:
A method for manufacturing a light-emitting semiconductor device comprising: forming a first N + -layer of N-type conduction of GaN with a high electron concentration; forming a second N + -layer of N-type conduction of group III nitride compound semiconductor, satisfying the formula Al x2 Ga y2 In 1-x2y2 N, where 0≦x2≦1, 0≦y2≦1, and 0≦x2+y2≦1 with a high electron concentration; forming an emission layer of group III nitride compound semiconductor satisfying the formula Al x3 Ga y3 In 1-x3y3 N, where 0≦x3≦1, 0≦y3≦1, and 0≦x3+y3≦1, the emission layer being formed on said second N + -layer; forming a P-layer of P-type conduction of group III nitride compound semiconductor satisfying the formula Al x4 Ga y4 In 1-x4y4 N, where 0≦x4≦1, 0≦y4≦1, and 0≦x4+y4≦1, the P-layer being formed on the emission layer; forming a hole for forming an electrode for said second N + -layer and extending from said P-layer to said second N + -layer; forming a groove extending from said P-layer to said second N + -layer; forming a first electrode on a top surface of said P-layer; and forming a second electrode on an upper exposed surface of said second N + -layer, wherein said groove exists between said first electrode and said second electrode and said groove electrically insulates said first electrode from said second electrode.