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:
Jul. 16, 2024
Filed:
Oct. 04, 2021
Macronix International Co., Ltd., Hsinchu, TW;
Ya-Jui Lee, Taichung, TW;
Kuan-Fu Chen, Taipei, TW;
MACRONIX International Co., Ltd., Hsinchu, TW;
Abstract
A flash memory and an erase method thereof are provided. The flash memory includes at least a memory array and a memory control circuit. The memory control circuit biases plural word lines, a common source line and a global bit line included in the memory array to erase plural memory cells in the flash memory. The method comprises grouping the plural word lines into plural word line groups according to erase depths corresponding to each word line; generating an erase voltage and plural multiple-step word line erase voltages; applying the erase voltage from at least one of the common source line and the global bit line; and during a period when the erase voltage is applied, the plural multiple-step word line erase voltages is respectively applied to the plural word line groups, wherein the plural multiple-step word line erase voltages is one-by-one corresponding to the plural word line groups.