Sharp Kabushiki Kaisha Corporation

Junji Hiraide

Hisao Kumai

Ken Satoh

Haruo Hinode

Touru Sugayama

Data falsification or the like is prevented and security is enhanced in an IC tag. The IC tag consists of three portions: separable portions Aand A, and a non-separable portion B (tag main body). The portions A, A, and B include IC, IC, and IC, and antenna, antenna, and antenna, respectively, the antennas being an interface between the tag and the outside (a reader/writer device for the exchange of data with the tag). IC() and IC() are connected by a signal line Lfor signal transmission between IC() and IC(). IC() and IC() are connected by a signal line Lfor signal transmission between IC() and IC(). Upon separation of Afrom the tag main body, the signal line Lis also severed. Similarly, upon separation of Afrom the tag main body, the signal line Lis severed. Each time the separable portions are separated in the order of Ato A, the separation of Aor Ais detected, and the function of the tag is changed from the first function to the third function sequentially.

Growing community of inventors

Chiba, Japan

Junji Hiraide