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. 16, 2002
Filed:
Oct. 27, 1999
Applicant:
Inventors:
Kazuki Watanabe, Kokubunji, JP;
Ryouzou Yoshino, Hadano, JP;
Kenji Nagai, Iruma, JP;
Tatsuya Nishihara, Koganei, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 2/708 ; H01L 2/100 ;
U.S. Cl.
CPC ...
G01R 2/708 ; H01L 2/100 ;
Abstract
A semiconductor integrated circuit device provided with an IC chip so as to prevent its circuits from malfunction when the IC chip is cracked. To detect chip cracks, a resistor R is disposed at the outer periphery of the area which wants to detect the chip crack. If the chip is cracked and the resistance value of the resistor R is changed, the resistance change is detected, thereby controlling internal signals such as the power on reset signal and stopping the whole operation of the circuit device so as to prevent the circuits from malfunction. Thus, the system security can also be improved.