Patent ID: 7310457

Claim:
A multi-chip module that comprises an optical element sending and receiving optical signals and is mounted on a printed circuit board in which an optical guide is formed, the multi-chip module comprising: an optical path-converting member that protrudes from a face of the multi-chip module that is to be inserted into an inserting hole formed on the printed circuit board so as to intersect the optical guide when mounting the multi-chip module; a chip which is electrically connected to an upper side of the optical element, wherein the optical element is partially in direct contact with an upper surface of the optical path-converting member, the optical path-converting member being inserted into the inserting hole to form an optical path guiding light from the optical element into the optical guide or guiding light transmitted through the optical guide into the optical element, wherein the optical path-converting member is an optical path-converting block formed of a light-reflecting material and having one or more optical paths at least one face thereof, the optical path being formed by providing a V-shaped light-guiding groove on at least one of a plurality of lateral surfaces of the optical path-converting block, the light-guiding groove guiding light from the optical element and a mirror formed at one end thereof.