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. 12, 2019
Filed:
Aug. 22, 2017
Applicant:
SK Hynix Inc., Gyeonggi-do, KR;
Inventors:
Assignee:
SK hynix Inc., Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01); G11C 29/00 (2006.01); G11C 29/42 (2006.01); G11C 29/50 (2006.01);
U.S. Cl.
CPC ...
G11C 29/783 (2013.01); G11C 29/42 (2013.01); G11C 29/50016 (2013.01);
Abstract
A memory device may include: a plurality of memory cells; a weak cell information storage unit suitable for storing a weak address and parity information corresponding to one or more weak cells having a shorter data retention time than a reference time, among the plurality of memory cells; an ECC (Error Correction Code) circuit suitable for detecting and correcting an error bit of the one or more weak cells using the parity information; and a refresh control unit suitable for controlling the plurality of memory cells to be refreshed at a cycle equal to or more than the reference time.