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:
Apr. 02, 2019
Filed:
Nov. 09, 2017
Winbond Electronics Corp., Taichung, TW;
Im-Cheol Ha, Taichung, TW;
Winbond Electronics Corp., Taichung, TW;
Abstract
This invention introduces a flash memory device and a method which are capable of quickly recovering the over-erased memory cells while preventing adverse influence to normal cells that are not over-erased. The flash memory device comprises a memory array and a memory controller coupled to the memory array. The memory controller is configured to select a memory block which comprises at least one over-erased memory cell. The memory controller is further configured to apply a negative voltage to the common bulk line and the common source line of the selected memory block. The memory controller is further configured apply a positive voltage to word lines that are coupled to the at least one over-erased memory cell in the selected memory block, and apply the positive voltage to word lines that are not coupled to any one of the at least one over-erased memory cell in the selected memory block.