Patent ID: 7278586

Claim:
A method for manufacturing an IC card, comprising the steps of: storing intrinsic information in an IC-chip of an IC module including the IC-chip and an antenna supported by an antenna supporting member; providing hidden intrinsic information on a part of the antenna supporting member; coating adhesive between two base plates opposing to each other to provide an adhesive layer; mounting the IC module on a predetermined position between the two base plates with the adhesive layer; laminating two base plates opposing to each other to prepare a card substrate; stamping card substrate into a card-shape to prepare a card; recording information of personal certification on the card surface; and writing the information of personal certification into the IC-chip wherein hidden intrinsic information corresponding to the stored intrinsic information is provided on said antenna supporting member either in such a way that the hidden intrinsic information is invisible by reflected light from the surface of the IC card and is read out from transmission light due to a transmission density difference between the recorded part of the hidden intrinsic information and a non-recorded part, or by use of an infrared absorbing material which is invisible in a visible light region.