Hitachi Maxell, Limited

Hiroto Watanabe

Kazuhiko Daido

Osamu Nakayama

Osamu Shiratsuchi

A contactless communication system information carrier which is high in handleability and yield but low in cost is provided. It includes a core piecein which an IC chipwith an antenna coilintegrally formed on one surface is fitted inside a recessof a core piece body, a non-metal spacerin which the core pieceis fitted to a fitting partlocated in a center of the spacerto retain the core pieceand a metal weightplaced and coupled so as to surround an outer periphery of the spacer. The antenna coiland the metal weightare separated from each other via the spacer

Non-contact communication system information carrier

A semiconductor device includes first and second antenna connection electrodes placed on the periphery of a semiconductor chip, an on-chip antenna connection electrode placed in the inner area of the semiconductor chip compared to the first and second antenna connection electrodes, and an internal circuit formed in the semiconductor chip. The first and second antenna connection electrodes are connected to the internal circuit by internal lines. The on-chip antenna connection electrode is connected to the internal circuit and the second antenna connection electrode by internal lines. An on-chip antenna is connected to the second antenna connection electrode and the on-chip antenna connection electrode. An external antenna is connected to the first and second antenna connection electrodes.

Growing community of inventors

Ibaraki, Japan

Hiroto Watanabe