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:
Sep. 15, 2015
Filed:
May. 12, 2014
Macronix International Co., Ltd., Hsinchu, TW;
Chi-Pei Lu, Hsinchu, TW;
Guan-De Lee, Hsinchu, TW;
MACRONIX International Co., Ltd., Hsinchu, TW;
Abstract
A method to improve accuracy of a low voltage state in flash memory cells and the memory therewith is proposed. In the method, at least one memory cell is selected from among a plurality of memory cells in the non-volatile memory according to a first voltage and a second voltage. The first voltage is less than the second voltage and greater than or equal to an erase state voltage level of the flash memory, and the second voltage is less than or equal to a read voltage level of the flash memory. A recovery erase operation is applied to the at least one selected memory cell, thereby erasing electrical charges of the at least one selected memory cell to lower a threshold voltage of the at least one selected memory cell.