Patent ID: 6909180

Claim:
A circuit substrate to be used for packaging a semiconductor device, comprising: a main body having input/output terminal electrodes on a surface thereof, with each of said input/output terminal electrodes having (i) a first surface that opposes said surface of said main body, and (ii) a second surface that faces in a direction opposite to that in which said first surface faces; and a resin film having conductive adhesive portions, composed of conductive adhesive including thermoplastic resins or thermosetting resins, on a surface of said resin film, each of said conductive adhesive portions having (i) a first surface that opposes said surface of said resin film, and (ii) a second surface that faces in a direction opposite to that in which said first surface faces, wherein the circuit substrate is formed by bonding said resin film onto said main body such that said conductive adhesive portions are positioned on said input/output terminal electrodes, respectively, and said resin film covers said surface of said main body and said input/output terminal electrodes along with said conductive adhesive portions.