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:
Jan. 04, 2022
Filed:
Feb. 28, 2020
Applicant:
SK Hynix Inc., Gyeonggi-do, KR;
Inventors:
Fan Zhang, Fremont, CA (US);
Aman Bhatia, Los Gatos, CA (US);
Xuanxuan Lu, San Jose, CA (US);
Meysam Asadi, Fremont, CA (US);
Haobo Wang, San Jose, CA (US);
Assignee:
SK hynix Inc., Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/34 (2006.01); G11C 16/14 (2006.01); G11C 16/08 (2006.01); G11C 16/26 (2006.01);
U.S. Cl.
CPC ...
G11C 16/3486 (2013.01); G11C 16/08 (2013.01); G11C 16/14 (2013.01); G11C 16/26 (2013.01); G11C 16/349 (2013.01);
Abstract
A memory controller optimizes read threshold values for a memory device using multi-dimensional search. The controller performs a read operation on cells using a pair of default read threshold values on a multi-dimensional plane. When the read operation has failed, the controller determines program states of cells and a pair of next read threshold values based on the program states and performs an additional read operation using the next read threshold values.