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:
Jun. 02, 2010
Takayuki Okamura, Tokyo, JP;
Noboru Ooike, Kanagawa-ken, JP;
Wataru Sakamoto, Tokyo, JP;
Takashi Izumida, Kanagawa-ken, JP;
Takayuki Okamura, Tokyo, JP;
Noboru Ooike, Kanagawa-ken, JP;
Wataru Sakamoto, Tokyo, JP;
Takashi Izumida, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A nonvolatile semiconductor memory device according to embodiment includes: a semiconductor substrate having an upper portion being partitioned into a plurality of semiconductor portions extending in a first direction; a charge storage film provided on the semiconductor portion; a word-line electrode provided on the semiconductor substrate and extending in a second direction intersecting with the first direction; and a pair of selection gate electrodes provided on both sides of the word-line electrode in the first direction on the semiconductor substrate and extending in the second direction, a shortest distance between a corner portion of each of the semiconductor portions and each of the selection gate electrodes being longer than a shortest distance between the corner portion of the semiconductor portion and the word-line electrode in a cross section parallel to the second direction.