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:
Oct. 31, 2017
Filed:
Aug. 11, 2016
Renesas Electronics Corporation, Tokyo, JP;
Shinji Tanaka, Tokyo, JP;
Yuichiro Ishii, Tokyo, JP;
Masaki Tsukude, Tokyo, JP;
Yoshikazu Saito, Tokyo, JP;
Renesas Electronics Corporation, Tokyo, JP;
Abstract
A semiconductor memory device includes a memory array including a plurality of memory cells arranged in a matrix form, a plurality of bit line pairs disposed in the columns of the memory cells, a plurality of word lines disposed in the rows of the memory cells, a write drive circuit adapted to transfer data to a bit line pair in a selected column in accordance with write data, and a control circuit that deselects the word lines during a test and drives a low-potential side bit line of the bit line pair in the selected column to a negative voltage level in accordance with the potentials of bit lines in the selected column.