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:
May. 12, 2009
Filed:
Jul. 12, 2007
Applicant:
Doo-sub Lee, Gyeonggi-do, KR;
Inventor:
Doo-Sub Lee, Gyeonggi-do, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a flash memory device, a multi-block erase operation is performed by applying stepwise increasing erase voltages to selected memory blocks during a first erase period and then applying fixed erase voltages to the selected memory blocks during a second erase period. Once a selected memory block is successfully erased in the first erase period, the device prevents erase voltages from being applied to the selected memory block for a remaining part of the first erase period.