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. 13, 2017
Filed:
Jun. 22, 2016
Macronix International Co., Ltd., Hsinchu, TW;
Kuen-Long Chang, Taipei, TW;
Nai-Ping Kuo, Hsinchu, TW;
Ken-Hui Chen, Hsin Chu, TW;
Chao-Hsin Lin, Taichung, TW;
MACRONIX INTERNATIONAL CO., LTD., Hsinchu, TW;
Abstract
A method, an electronic device and a controller for recovering an array of memory cells are provided. The method comprises the following steps. Whether a recovery control signal is received or not is determined. A retention checking procedure is executed for identifying whether a threshold voltage distribution of at least one bit of the memory cells in high threshold state is shifted or not, if the recovery control signal is received. A retention writing procedure is executed on the memory cells, if the memory cells in high threshold state do not pass the retention checking procedure.