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:
Oct. 14, 2008
Filed:
Dec. 27, 2005
Tuan D. Pham, San Jose, CA (US);
Masaaki Higashitani, Cupertino, CA (US);
Hao Fang, Shanghai, CN;
Gerrit Jan Hemink, Yokohama, JP;
Tuan D. Pham, San Jose, CA (US);
Masaaki Higashitani, Cupertino, CA (US);
Hao Fang, Shanghai, CN;
Gerrit Jan Hemink, Yokohama, JP;
SanDisk Corporation, Milpitas, CA (US);
Abstract
A NAND flash memory device incorporates a unique booster plate design. The booster plate is biased during read and program operations and the coupling to the floating gates in many cases reduces the voltage levels necessary to program and read the charge stored in the gates. The booster plate also shields against unwanted coupling between floating gates. Self boosting, local self boosting, and erase area self boosting modes used with the unique booster plate further improve read/write reliability and accuracy. A more compact and reliable memory device can hence be realized according to the present invention.