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:
Jun. 20, 2017
Filed:
Jul. 22, 2013
Applicant:
Taiwan Semiconductor Manufacturing Company Ltd., Hsinchu, TW;
Inventors:
Sergiy Romanovskyy, Ottawa, CA;
Cormac Michael Oconnell, Ontario, CA;
Assignee:
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu, TW;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G11C 11/406 (2006.01); G06F 11/10 (2006.01);
U.S. Cl.
CPC ...
G11C 11/406 (2013.01); G06F 11/106 (2013.01); G06F 11/1008 (2013.01); G06F 11/1048 (2013.01); G11C 2211/4061 (2013.01);
Abstract
In a method, error detection and correction is performed on output data from a memory cell of a memory device to generate a result of error detection and correction. The memory cell is determined as a weak cell by determining a number of times of data retention failures of the memory cell based on the result of the error detection and correction. In a refreshing cycle, normal cells and the weak cell are refreshed and the weak cell is additionally refreshed at least once.