Patent ID: 7079776

Claim:
An optical signal transmission device comprising: a plurality of optical signal transmission substrates, each of the plurality of optical signal transmission substrates including a plurality of first electrodes and a plurality of optical signal transmission areas where at least one of a light emitting element for sending an optical signal to one of the plurality of optical signal transmission substrates or a light receiving element for receiving an optical signal from one of the plurality of optical signal transmission substrates is located so as to be capable of sending or receiving the optical signal in a direction substantially perpendicular to a surface of the plurality of optical signal transmission substrates; and an adhesive layer formed between the plurality of optical signal transmission substrates, the adhesive layer including a plurality of second electrodes and an adhesive agent for electrically connecting one of the plurality of optical signal transmission substrates with another of the plurality of optical signal transmission substrates, the plurality of second electrodes being in contact with the plurality of first electrodes; wherein an optical signal transmission member formed by the plurality of optical signal transmission substrates being laminated in such a manner that at least one of the plurality of optical signal transmission areas of one of the plurality of optical signal transmission substrates overlaps the plurality of optical signal transmission areas of another of the plurality of optical signal substrates, and wherein the light receiving element is located in at least one of the plurality of optical signal transmission substrates so as to be opposite the light emitting element provided in at least one of the other optical signal transmission substrates.