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:
Jan. 20, 2015
Filed:
Feb. 27, 2013
Kabushiki Kaisha Toshiba, Tokyo, JP;
Kei Sakamoto, Nagoya, JP;
Takayuki Okamura, Yokkaichi, JP;
Nobuaki Yasutake, Yokkaichi, JP;
Jun Nishimura, Kuwana, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory device according to an embodiment includes a memory cell array including memory cells, the memory cells each configured having a current rectifier element and a variable resistance element connected in series therein. Each of the memory cells has formed on aside surface thereof: a first insulating film provided on aside surface of the current rectifier element and the variable resistance element and having a composition ratio of a non-silicon element to silicon which is a first value; a silicon oxide film provided on a side surface of the first insulating film; and a second insulating film provided on aside surface of the silicon oxide film and having a composition ratio of a non-silicon element to silicon which is a second value. The first value is smaller than the second value.