Patent ID: 7167608

Claim:
A hybrid circuit substrate manufacturing method for manufacturing a hybrid circuit substrate with optical and electrical interconnects, comprising the steps of: manufacturing a base substrate section having an interconnect layer formed on an insulating substrate using a printed circuit manufacturing process; manufacturing a micro interconnect circuit section having a micro electrical interconnect layer which is finer than the interconnect layer of the base substrate section and having first and second mounting surfaces using a semiconductor manufacturing process; manufacturing 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 for output of an optical signal at opposite ends thereof and an optical element composed of a light emitting device with a light emitting section thereof facing the input section and a photo detecting device with a photo detecting section thereof facing the output section; mounting said micro interconnect circuit section and said optical interconnect circuit section on said base substrate section by first mounting said micro interconnect circuit section on a surface of said base substrate section with said first mounting surface facing said base substrate section; and mounting said optical interconnect circuit section on said second mounting surface of said micro interconnect circuit section, wherein, said micro interconnect circuit section and said optical interconnect circuit section are stacked on said base substrate section.