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:
Mar. 21, 2000
Filed:
Feb. 23, 1998
Applicant:
Inventors:
Chia-Hsing Chen, I-Lan Hsian, TW;
Mam-Tsung Wang, Hsinchu, TW;
Assignee:
Macronix International Co., Ltd., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518503 ; 36518519 ; 36518522 ;
Abstract
A method for programming an analog/multi-level flash memory array, which insures fast programming to substantially all of the cells in the array, without over-programming, is based on providing a pattern of program retry pulses which have respective pulse widths and pulse heights which vary according to a pattern. The pattern includes three stages which program and verify cell threshold voltages with different program verification margins so that an accurate cell threshold voltage can be achieved for each cell.