Patent ID: 7266262

Claim:
A hybrid circuit substrate with optical and electrical interconnects comprising: a base substrate section having an interconnect layer formed on an insulating substrate by a printed circuit process; a micro interconnect circuit section having a micro electrical interconnect layer which is finer than the interconnect layer of the base substrate section, said micro interconnect circuit section being formed on an insulating resin layer by a semiconductor process; and an optical interconnect circuit section adapted to transfer and/or receive an optical signal and provided with an optical wave-guide having an input section and an output section of a optical signal at opposite ends thereof, and said optical interconnect circuit section having an optical element composed of a light emitting device with a light emitting section thereof facing the optical signal input section and a photo detecting device with a photo detecting section thereof facing the optical signal output section; wherein, said optical interconnect circuit section is mounted directly on said micro interconnect circuit section and both circuit sections are layered on said base substrate section so as to transmit an optical signal and an electrical signal, respectively.