Patents by Inventor Yoshio Masumura

Yoshio Masumura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Semiconductor device including an arrangement for detection of tampering
    Patent number: 7652363
    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 operate 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 state of the wiring lines, the integrated circuit is reset. Thus, it is possible to improve the security of information stored on the card.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: January 26, 2010
    Assignee: Renesas Technology Corp.
    Inventors: Hirotaka Mizuno, Yoshio Masumura, Takeo Kon, Yukio Kawashima
  • Semiconductor device and IC card including supply voltage wiring lines formed in different areas and having different shapes
    Patent number: 7557436
    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.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: July 7, 2009
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Hirotaka Mizuno, Yoshio Masumura, Takeo Kon, Yukio Kawashima
  • Semiconductor device and IC card including supply voltage wiring lines formed in different areas and having different shapes
    Publication number: 20070126100
    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.
    Type: Application
    Filed: November 1, 2006
    Publication date: June 7, 2007
    Inventors: Hirotaka Mizuno, Yoshio Masumura, Takeo Kon, Yukio Kawashima
  • Semiconductor device and IC card
    Publication number: 20060214280
    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 operate 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 state of the wiring lines, the integrated circuit is reset. Thus, it is possible to improve the security of information stored on the card.
    Type: Application
    Filed: May 24, 2006
    Publication date: September 28, 2006
    Inventors: Hirotaka Mizuno, Yoshio Masumura, Takeo Kon, Yukio Kawashima
  • Semiconductor device and ic card
    Publication number: 20040212017
    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 operate 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 state of the wiring lines, the integrated circuit is reset. Thus, it is possible to improve the security of information stored on the card.
    Type: Application
    Filed: February 6, 2004
    Publication date: October 28, 2004
    Inventors: Hirotaka Mizuno, Yoshio Masumura, Takeo Kon, Yukio Kawashima