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:
Jun. 18, 2002
Filed:
Jun. 15, 2001
Applicant:
Inventors:
Byung Jin Ahn, Seoul, KR;
Hee Hyun Chang, Sungnam-shi, KR;
Assignee:
Hyundai Electronics Industries Co., Ltd., Kyungki-do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/604 ;
U.S. Cl.
CPC ...
G11C 1/604 ;
Abstract
Methods of erasing a flash memory device are disclosed. After performing a first erasure operation, the methods perform a second erasure operation wherein an erasure pulse width or an erasure voltage is increased if the number of erased cells is below a predetermined number of erased cells, and wherein an erasure pulse width or an erasure voltage is reduced if the number of erased cell is more than a predetermined number of erased cells.