Patent ID: 8120044

Claim:
A multi-chip having an optical interconnection unit, comprising: a plurality of silicon chips sequentially stacked; a plurality of optical device arrays individually at a lateral side of one of the plurality of the silicon chips such that each of the plurality of the optical device arrays corresponds to one of the plurality of the silicon chips, wherein each of the plurality of the optical device arrays includes at least one of a light emitting device and a light receiving device, the light-emitting device and the light receiving device correspond to each other and are arranged vertically on different optical device arrays of the plurality of optical device arrays; and a wiring electrically connecting each of the silicon chips to the optical device array on the lateral side thereof, wherein the corresponding light-emitting device and light-receiving device vertically transmit an optical signal between each other to form the optical interconnection unit, and the corresponding silicon chips and optical device arrays are separately disposed side-by-side.