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:
Jun. 06, 2017
Filed:
Oct. 26, 2015
Applicant:
Renesas Electronics Corporation, Tokyo, JP;
Inventor:
Yoshiki Tsujihashi, Tokyo, JP;
Assignee:
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 7/10 (2006.01); G11C 29/02 (2006.01); G11C 29/38 (2006.01); G11C 7/06 (2006.01);
U.S. Cl.
CPC ...
G11C 29/025 (2013.01); G11C 29/38 (2013.01); G11C 7/065 (2013.01);
Abstract
A semiconductor device includes a word line coupled to a mask ROM memory cell, a bit line pair coupled to the memory cell, a differential sense amplifier for amplifying the potential difference of the bit line pair, and a logic circuit for detecting whether the logic states of the bit line pair match or not. In this way, when there is a failure in the memory cell, it is possible to prevent the semiconductor device from passing the test as a result of the determination that the actual value is the same as the expected value in the test even if there is no potential difference in the bit line pair.