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:
Feb. 21, 2006
Filed:
Oct. 13, 2004
Applicants:
Hiromi Okimoto, Hyogo, JP;
Yoshikazu Miyawaki, Hyogo, JP;
Satoru Kishida, Hyogo, JP;
Daisuke Agawa, Hyogo, JP;
Inventors:
Hiromi Okimoto, Hyogo, JP;
Yoshikazu Miyawaki, Hyogo, JP;
Satoru Kishida, Hyogo, JP;
Daisuke Agawa, Hyogo, JP;
Assignee:
Renesas Technology Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
In the present flash memory a threshold voltage of a memory transistor to which data is written is detected and the detected value is used to set an initial value of a pulse voltage of a write pulse signal, and whenever the write pulse signal is applied, the pulse voltage is increased by a step voltage. The memory transistor's drain current and the threshold voltage's variation can be smaller than when a fixed pulse voltage is applied, as conventional.