Patent ID: 8548284

Claim:
An optical element module comprising: a silicon substrate in which an optical element and a semiconductor circuit element are mounted on one surface of a front surface and a rear surface thereof, and an optical fiber is mounted on the other surface; wherein the optical element and the semiconductor circuit element are mounted on the one surface and are connected to a metal wiring formed on the one surface via bumps; wherein the optical fiber is mounted along the other surface on the other surface; wherein, on the other surface of the silicon substrate, a mirror surface inclined at approximately 45 degrees with respect to the one surface and the other surface, a V groove for carrying out positioning to dispose the optical fiber facing the mirror surface along the other surface, and an attaching surface substantially perpendicular to the one surface and the other surface, which is formed at an end side of the V groove, and for attaching an end of the optical fiber, are formed; wherein the silicon substrate is a (100) silicon single crystal, each of the mirror surface and V-shaped side surfaces of the V groove is a {110} plane, and the attaching surface is a {100} plane; wherein silicon nitride films are formed on the entire other surface of the silicon substrate and on a portion of the one surface of the silicon substrate through which light passes; and wherein a silicon oxide film is further formed on the silicon nitride film on the other surface of the silicon substrate.