Abstract: A method of manufacturing a transponder for a wireless card includes forming an antenna coil on a film sheet, short-circuiting both end portions of the antenna coil by a short-circuit portion, mounting an LSI on the film sheet, electrically connecting a terminal of the LSI to both ends of the antenna coil, and removing the short-circuit portion after the LSI is mounted.

Abstract: A contact-type IC card includes a plurality of holes formed in the second portion of a core sheet providing a card body. The second portion is other than a first portion including a mounting portion that has an IC module mounted therein. When the card body is bent, the holes serve as rigidity adjusting means for preventing bending stress from occurring in the IC module.

Abstract: The present invention is provided with a base board on which wiring is provided, a memory, installed on the base board by soldering, for storing data and a certification key, and a memory control LSI. The memory control LSI is a fabricated as a bare chip incorporating an internal memory for storing data and a certification key, and a control section for controlling the storing of data in the memory and the reproduction of the data from the memory. The bare chip is installed on the base board and covered with sealing resin. The bare chip is connected to the base board by gold wire bonding. The certification key stored in the memory is compared with the certification key stored in the internal memory. Based on the coincidence or non-coincidence between these keys, the control section determines whether or not the memory is an intended one.