Patent ID: 8041159

Claim:
An optical/electrical hybrid device comprising: a wiring substrate comprising a plurality of wiring layers, a plurality of insulating layers and a plurality of through vias, wherein the plurality of wiring layers and the plurality of insulating layers are alternately disposed, and the plurality of wiring layers are electrically connected to each other via the plurality of through vias; an optical waveguide disposed on the wiring substrate and configured to transmit an optical signal; a mirror support bonded directly onto the wiring substrate with an adhesive and being made of glass or silicon; a mirror which reflects the optical signal and which is formed on an inclined surface of the mirror support; an underfill resin formed to fill a space between the mirror and the optical waveguide; and at least one of a light-emitting element and a light-receiving element disposed over the mirror, wherein the optical waveguide is opposed to a reflection surface of the mirror which reflects the optical signal.