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:
Mar. 03, 2015
Filed:
Aug. 02, 2011
Applicant:
Masanobu Oomura, Yokohama, JP;
Inventor:
Masanobu Oomura, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/26 (2014.01); H01L 23/00 (2006.01); H03K 3/03 (2006.01); H03K 5/19 (2006.01);
U.S. Cl.
CPC ...
H01L 23/576 (2013.01); H03K 3/0315 (2013.01); H03K 5/19 (2013.01);
Abstract
A semiconductor integrated circuit device has a circuit block formed on a semiconductor substrate, and an electrically conductive pattern formed in an upper layer of a portion of the circuit block that is to be protected. An oscillation circuit is connected to the electrically conductive pattern, and is configured to oscillate at an oscillation frequency determined by a circuit constant of the electrically conductive pattern, and a detection circuit is configured to determine whether a preset range includes the oscillation frequency of the oscillation circuit.