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:
Jul. 19, 2016
Filed:
Sep. 10, 2015
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Yoichi Minemura, Yokkaichi, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
A semiconductor memory device according to an embodiment comprises a stacked body, the stacked body including a plurality of conductive layers disposed on a semiconductor substrate and an inter-layer insulating film disposed between the plurality of conductive layers. A columnar semiconductor layer is surrounded as a stacking direction of the stacked body. An isolation film extends from an outer surface of the stacked body to a bottom of the stacked body and has a longitudinal direction in a second direction. At least some of the isolation films include a base portion extending in the second direction and a terminal portion positioned at an end of the base portion, and a width of the end in a third direction intersecting the second direction is larger than a width of the base portion.