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. 14, 2014
Filed:
Mar. 17, 2010
Yoshiko Kato, Kanagawa-ken, JP;
Mitsuhiro Noguchi, Kanagawa-ken, JP;
Hiroyuki Kutsukake, Kanagawa-ken, JP;
Yoshiko Kato, Kanagawa-ken, JP;
Mitsuhiro Noguchi, Kanagawa-ken, JP;
Hiroyuki Kutsukake, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory device includes: a semiconductor substrate; a plurality of element isolation insulators disposed in parts of an upper layer portion of the semiconductor substrate and dividing the upper layer portion into a plurality of active areas extended in one direction; tunnel insulating films provided on the active areas: charge storage members provided on the tunnel insulating films; and control gate electrodes provided on the charge storage members. A width of a middle portion of one of the active areas in the up-to-down direction being smaller than a width of a portion of the active areas upper of the middle portion and a width of a portion of the active areas below the middle portion.