Patent ID: 8097816

Claim:
A method of producing an electronic device comprising: mounting electronic parts on only a first face of a circuit board; holding the circuit board in a cavity of a mold in a manner that a second face of the circuit board opposite from the first face is tightly contact with a first inner face of the mold; holding a decoration sheet between the first face of the circuit board and a second inner face of the mold opposing to the first face of the circuit board, the decoration sheet having a transparent base made of thermoplastic resin and a decoration layer layered on the base, the decoration layer opposing to the first face of the circuit board; filling thermosetting resin into the cavity after the holdings of the circuit board and the decoration sheet; and solidifying the filled resin, such that a casing is molded by the solidified resin so as to seal the electronic parts and the first face of the circuit board in a manner that the second face of the circuit board defines a part of an outer surface of the casing, wherein the solidifying of the filled resin integrates the decoration sheet and the casing, such that the decoration sheet defines a part of the outer surface of the casing.