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:
Aug. 24, 1999
Filed:
Aug. 07, 1998
Applicant:
Inventor:
William W Lee, Palo Alto, CA (US);
Assignee:
Winbond Electronics Corporation, Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518514 ; 36518528 ; 36518533 ;
Abstract
A method of programming a flash memory device. The method includes a step of applying a voltage that is less than a threshold voltage to a select gate of a flash memory device. Electrons are transferred from a source/drain region or preferably the source region through a region underlying the select gate to a channel region underlying a floating gate. The transferring step occurs using an electron gradient from a higher concentration region in the source region to a lower concentration region in the channel region. By way of a selected voltage applied to a control gate, one of a plurality of selected voltage levels are applied to the floating gate.