Patent ID: 6963086

Claim:
A semiconductor light emitting device comprising: a crystal layer comprising: a first conductive type layer, an active layer, and a second conductive type layer formed on a crystal growth layer; said crystal layer having a tilt crystal plane tilted from a principal plane of a substrate; and an electrode formed on only a partial area of the tilt crystal plane; wherein said electrode is formed in a region on the tilt crystal plane, the region being surrounded by a first plane extending in parallel to the principal plane of said substrate, and a second plane extending in parallel to the principal plane of said substrate; wherein an angle formed between the principal plane of said substrate and the tilt crystal plane is taken as θ, a first ridge line of said tilt crystal plane from the principal plane of said substrate by an angle of θ, the first plane containing a first point on the first ridge line of said tilt crystal plane, the second plane containing a second point on the first ridge line of said tilt crystal plane, the first point on the first ridge line is defined by a point at which a first straight line tilted from a bottom side of an opposing tilt crystal plane by an angle of 2θ−90° intersects the first ridge line, the second point on the first ridge line is defined by a point at which a second straight line tilted from the first plane by an angle of 2θ−90° intersects the first ridge line, said opposing tilt crystal plane forming an angle of θ with the principal plane of said substrate, a second ridge line of said opposing tilt crystal plane tilted from the principal plane of said substrate by an angle of θ, the first straight line starting from an intersection between the bottom side of said opposing tilt crystal plane and the second ridge line, and the second straight line starting from an intersection between the first plane and the second ridge line.