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:
Nov. 21, 2017
Filed:
Sep. 07, 2016
Toshiba Memory Corporation, Minato-ku, JP;
Yuki Kanamori, Kamakura, JP;
Yuji Nagai, Sagamihara, JP;
Jun Nakai, Yokohama, JP;
Kenri Nakai, Fujisawa, JP;
TOSHIBA MEMORY CORPORATION, Minato-ku, JP;
Abstract
A semiconductor memory device according to an embodiment includes: a memory cell array including a plurality of memory cells that are NAND-connected; and a control circuit that executes a write sequence, the write sequence writing data to the memory cells, the write sequence including a plurality of write stages, one of the write stages applying to the memory cells a plurality of program pulses whose amplitudes increase by a certain increment, the write stages including 1st to Nth, where N is an integer of 2 or more, write stages, and an initial amplitude and the increment of the program pulse applied in the N−1th write stage being the same as an initial amplitude and the increment of the program pulse applied in the Nth write stage.