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:
Mar. 23, 2021
Filed:
Feb. 26, 2020
Kioxia Corporation, Tokyo, JP;
Koji Horisaki, Yokohama Kanagawa, JP;
Kazuhisa Horiuchi, Yokohama Kanagawa, JP;
Ryo Yamaki, Yokohama Kanagawa, JP;
Gibeom Park, Yokohama Kanagawa, JP;
Youyang Ng, Yokohama Kanagawa, JP;
KIOXIA CORPORATION, Tokyo, JP;
Abstract
A memory controller performs a reference read on a plurality of memory cells using reference read voltages, generates a histogram indicating the number of memory cells in different threshold voltage bins based on results of the reference read, estimates actual read voltages based on the histogram and a first estimation function, and reads data using the actual read voltages. When reading of the data with the actual read voltages estimated using the first estimation function fails, the memory controller estimates actual read voltages using a second estimation function different from the first estimation function and reads the data with the actual read voltages estimated using the second estimation function.