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. 10, 1987
Filed:
Nov. 26, 1984
Applicant:
Inventors:
Manabu Tsuchida, Yokohama, JP;
Masanobu Yoshida, Kawaguchi, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365185 ; 365194 ; 365230 ;
Abstract
A programmable read-only memory device comprising a memory cell transistor which has a floating gate and a control gate formed above the floating gate. The programmable read-only memory device further comprises a means for delaying the application timing of a high voltage to the control gate from that of a high voltage to the drain of the memory cell transistor when a data programming operation is performed by applying the high voltage to the control gate and the drain of the memory cell transistor, thereby ensuring reliable a data write operation even at a low programming voltage.