The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2009
Filed:
Nov. 01, 2006
Hirotaka Mizuno, Kodaira, JP;
Yoshio Masumura, Tachikawa, JP;
Takeo Kon, Kodaira, JP;
Yukio Kawashima, Chitose, JP;
Hirotaka Mizuno, Kodaira, JP;
Yoshio Masumura, Tachikawa, JP;
Takeo Kon, Kodaira, JP;
Yukio Kawashima, Chitose, JP;
Renesas Technology Corp., Tokyo, JP;
Hitachi ULSI Systems Co., Ltd., Tokyo, JP;
Abstract
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.