Patent ID: 7536066

Claim:
A semiconductor chip module, comprising: a semiconductor chip mounted on a circuit board; and a transmission optical waveguide device for transmitting a light signal obtained by modulating light from an external light source to a different device; said transmission optical waveguide device including: an input optical waveguide to which the light from said external light source is inputted; an output optical waveguide, provided at a position displaced in a direction perpendicular to the surface of said circuit board in a mounted state on said circuit board with respect to said input optical waveguide, outputting an optical signal to the different device; an optical path changeover structure for guiding the light guided through said input optical waveguide to said output optical waveguide; and an optical modulator, provided at said input optical waveguide or said output optical waveguide, modulating the light from said external light source based on an electric signal from said semiconductor chip; further comprising: a reception optical waveguide device including a reception input optical waveguide guiding the optical signal from the different device to an end face thereof on said semiconductor chip side; and a photoelectric conversion device, mounted on said circuit board so as to be connected to said reception optical waveguide, converting the optical signal into an electric signal, wherein said transmission optical waveguide device and said reception optical waveguide device are provided in a juxtaposed relationship in a direction parallel to the surface of said circuit board.