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:
Dec. 03, 2013
Filed:
Sep. 12, 2011
Koichi Fukuda, Yokohama, JP;
Koichi Fukuda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A memory system includes a controller and a memory part including a memory cell array including memory cells, word lines, bit lines including bit line pairs each composed of an even bit line and an odd bit line adjacent to each other, and sense amplifiers provided to the bit line pairs and configured to detect data in selected memory cells connected to a selected word line. When reading data is performed from first memory cells to which writing data is performed first in memory cell pairs each including two adjacent memory cells respectively connected to one of the even bit lines and one of the odd bit lines, the controller controls the memory part so as to change a read level voltage applied to the selected word line depending on a data write state of second memory cells in the memory cell pairs to which writing data is performed later.