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:
Apr. 08, 2008
Filed:
Dec. 22, 2005
Applicants:
Wenbo LI, Singapore, SG;
Maggie L. F. Tan, Singapore, SG;
Siow Lee Chwa, Singapore, SG;
Fei Xu, Singapore, SG;
Inventors:
Wenbo Li, Singapore, SG;
Maggie L. F. Tan, Singapore, SG;
Siow Lee Chwa, Singapore, SG;
Fei Xu, Singapore, SG;
Assignee:
Chartered Semiconductor Manufacturing Ltd., Singapore, SG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/03 (2006.01);
U.S. Cl.
CPC ...
Abstract
A memory system includes a memory block having at least one memory cell. The current is sensed after the erase operations of the memory cell. A signal is generated in response to the current dropping below a predetermined level after the erase operations of the memory cell. The stress on the memory cell is reduced to a first reduced level for erase operations occurring subsequent to the current dropping below the predetermined level.