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. 08, 2019
Filed:
May. 16, 2018
Toshiba Memory Corporation, Minato-ku, JP;
Takeshi Sonehara, Yokkaichi, JP;
Masaru Kito, Kuwana, JP;
TOSHIBA MEMORY CORPORATION, Minato-ku, JP;
Abstract
According to an embodiment, a semiconductor memory device comprises control gate electrodes and a semiconductor layer. The control gate electrodes are stacked above a substrate. The semiconductor layer has as its longitudinal direction a direction perpendicular to the substrate. The semiconductor memory device further comprises first and second control gate electrodes and third and fourth control gate electrodes stacked sequentially above the substrate and first through fourth via contacts connected to these first through fourth control gate electrodes. The third and fourth control gate electrodes face the first and second control gate electrodes. Positions of the first and second via contacts are far from each other. Positions of the third and fourth via contacts are close to each other.