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:
Sep. 10, 2013
Filed:
Aug. 04, 2011
Koji Hosono, Fujisawa, JP;
Satoru Takase, Yokohama, JP;
Koji Hosono, Fujisawa, JP;
Satoru Takase, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory device according to the embodiment comprises a memory cell array including first line, second line crossing the first line, and memory cell containing variable resistance element provided on the intersection of the first and second lines; a data write unit operative to cause the variable resistance element to make a transition from a first resistance to a second resistance different from the first resistance; and a resistance state detection unit including an abnormality detection circuit operative to detect a transition of the resistance of the variable resistance element to a third resistance when the data write unit causes the variable resistance element to make the transition from the first resistance to the second resistance (where the third resistance<the first resistance<the second resistance, or the third resistance>the first resistance>the second resistance).