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. 02, 2019
Filed:
Nov. 06, 2017
Macronix International Co., Ltd., Hsinchu, TW;
Shaw-Hung Ku, Hsinchu, TW;
Yu-Hung Huang, Tainan, TW;
Cheng-Hsien Cheng, Yunlin County, TW;
Chih-Wei Lee, New Taipei, TW;
Atsuhiro Suzuki, Hsinchu, TW;
Wen-Jer Tsai, Hualien, TW;
MACRONIX INTERNATIONAL CO., LTD., Hsinchu, TW;
Abstract
An erase-verify method for a three-dimensional (3D) memory and a memory system are provided. The 3D memory includes at least one memory cell string including a plurality of memory cells, and the memory cells include a first group of memory cells and a second group of memory cells. Each of the memory cells is coupled to a word line. The method comprises the following steps. A first erase-verify operation is performed on the first group of memory cells. After performing the first erase-verify operation on the first group of memory cells, a second erase-verify operation is performed on the second group of memory cells in condition that the first group of memory cells are verified as erased successfully.