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:
Aug. 24, 2021
Filed:
Feb. 27, 2020
Kioxia Corporation, Tokyo, JP;
Rui Ito, Chigasaki Kanagawa, JP;
Makoto Morimoto, Yokohama Kanagawa, JP;
Yutaka Shimizu, Yokohama Kanagawa, JP;
Ryuichi Fujimoto, Ota Tokyo, JP;
KIOXIA CORPORATION, Tokyo, JP;
Abstract
According to one embodiment, a semiconductor memory device includes a plurality of memory cells connected to a word line, a circuit configured to apply a voltage to the word line, a detection circuit configured to detect a first time difference from when a first signal of which a voltage is increased with a first slope is applied to the word line to when a current flows through the memory cells in response to applying the first signal, and a second time difference from when a second signal of which a voltage is increased with a second slope is applied to the word line to when a current flows through the memory cells in response to applying the second signal, the second slope being different from the first slope, and a determination circuit configured to determine a threshold voltage of the memory cells based on a difference between the first time difference and the second time difference.