Patent ID: 8230588

Claim:
A method of making an electronic device, comprising the steps of: providing an electronic device substrate comprising: a base material formed of a thin board, the base material comprising a tape member, a metal film formed on the tape member, a release layer formed on the metal film and a metal layer formed on the release layer; an electrical insulation layer formed on the metal layer of the base material and a plurality of openings in a thickness direction thereof; and a metal plating layer filled in the plurality of openings; mounting an electronic parts on the electronic device substrate, electrically connecting an electrode of the electronic parts to the metal plating layer, and subsequently covering at least the electrical connection between the electronic parts and the metal plating layer with an insulating covering material; removing the tape member and the metal film from the electronic device substrate by using the release layer to leave the metal layer with the electronic device substrate; and forming a conductive structure at a position corresponding to the metal plating layer by processing the metal layer by using a photo fabrication.