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. 26, 2021
Filed:
Sep. 03, 2019
Toshiba Memory Corporation, Tokyo, JP;
Shinichi Sotome, Yokkaichi Mie, JP;
Tatsufumi Hamada, Nagoya Aichi, JP;
TOSHIBA MEMORY CORPORATION, Tokyo, JP;
Abstract
A semiconductor storage device includes a stacked body and a columnar body. The stacked body includes a plurality of conductive layers and a plurality of insulating layers that are alternately stacked in a first direction. The columnar body extends through the stacked body in the first direction and includes a core portion, a channel film, a tunnel oxide film, and a charge storage film in this order from a center portion thereof. The channel film has a first region in contact with the core portion and a second region in contact with the tunnel oxide film. The first region is a semiconductor doped with impurities. The second region is a semiconductor. A concentration of the impurities in the second region is lower than that in the first region.