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. 23, 2009
Filed:
Jun. 08, 2006
Applicant:
Lien-che Ho, Hsinchu, TW;
Inventor:
Lien-Che Ho, Hsinchu, TW;
Assignee:
MACRONIX International Co., Ltd., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A plurality of cells of a flash memory are tested to determine if they need to be refreshed. The cells are read and a plurality of different sensing ratios are used to determine if any of the cells need to be refreshed. Any cells that are determined to need refreshing are refreshed. The cells are read using only a single constant gate voltage.