Patent ID: 8053788

Claim:
A rod-shaped semiconductor device having a light-receiving or light-emitting function, said rod-shaped semiconductor device comprising: a rod-shaped substrate made of p-type or n-type semiconductor crystal having a circular or near-circular cross section, a separate conductive layer which is formed on a part of a surface of said substrate excluding a band-shaped part parallel to an axis of said substrate and has a different conduction type from that of said substrate, a near-cylindrical pn-junction formed with said substrate and said separate conductive layer, a band-shaped first electrode ohmic-connected to a surface of said band-shaped part on said substrate, a band-shaped second electrode ohmic-connected to a surface of said separate conductive layer on an opposite side of said first electrode across the axis of said substrate, and a light-emitting diode, wherein said substrate comprises an n-type GaP single crystal or GaAs single crystal, and said separate conductive layer comprises an n-type diffusion layer with Zn thermally diffused.