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:
Nov. 18, 2003
Filed:
May. 17, 2002
Applicant:
Inventors:
Hirotomo Miura, Tokyo, JP;
Yasuo Sato, Tokyo, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/1469 ;
U.S. Cl.
CPC ...
H01L 2/1469 ;
Abstract
A method of writing data into a memory cell of a non-volatile semiconductor memory device includes setting a write voltage applied to portions of the memory cells depending upon a value of write data, and applying, to a gate electrode, a voltage by which an electric charge is allowed to tunnel through an insulating film on a lower side of a dialectric film that captures the electric charge corresponding to a data value. The amount of electric charge captured is easily and reliably adjusted in order to store desired multi-value digital data, while preventing occurrence of data corruption.