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. 17, 2013
Filed:
Apr. 27, 2011
Hea Jong Yang, Gyeonggi-do, KR;
Hee Youl Lee, Gyeonggi-do, KR;
Sung Jae Chung, Seoul, KR;
Hyun Heo, Seoul, KR;
Jeong Hyong Yi, Gyeonggi-do, KR;
Yong Dae Park, Gyeonggi-do, KR;
Hea Jong Yang, Gyeonggi-do, KR;
Hee Youl Lee, Gyeonggi-do, KR;
Sung Jae Chung, Seoul, KR;
Hyun Heo, Seoul, KR;
Jeong Hyong Yi, Gyeonggi-do, KR;
Yong Dae Park, Gyeonggi-do, KR;
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Abstract
A method of erasing a semiconductor memory device comprises grouping a plurality of word lines of each memory block into at least two groups based on intensity of disturbance between neighboring word lines; performing an erase operation by applying a ground voltage to all word lines of a selected memory block and by applying an erase voltage to a well of the selected memory block; and first increasing the ground voltage of one group of the groups to a positive voltage during the erase operation.