Antonelli, Terry, Stout & Kraus, LLP.
Semiconductor device and IC card including supply voltage wiring lines formed in different areas and having different shapes
Wiring lines for the supply of a voltage to feed a drive voltage to an integrated circuit formed in a semiconductor chip are disposed so as to cover a main surface of the semiconductor chip, so that, if the wiring lines are removed for the purpose of analyzing information stored in the semiconductor chip, the integrated circuit does not operates and it is impossible to analyze the information. Further, there is provided a processing detector circuit for detecting that the wiring lines have been tampered with. When the processing detector circuit detects a change in the sate of the wiring lines, the integrated circuit is reset. Thus, it is possible to improve the security of information stored on the card.
Hitachi ULSI Systems Co., Ltd. Renesas Technology Corp.
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additional inventional inventional additional additional inventional additional inventional additional additional additional additional additional additional additional additional inventional additional additional additional additional inventional additional inventional additional inventional additional additional additional additional
Yoshio Hirotaka Yukio Takeo
Masumura Mizuno Kawashima Kon