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. 01, 1994
Filed:
Feb. 06, 1992
Applicant:
Inventor:
Sinsuke Kumakura, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
257316 ; 257435 ; 257773 ;
Abstract
A control gate formed on top of an insulation layer over a floating gate for a transistor element of a memory cell in a redundancy ROM is shaped in a form covering not only the top but also the sides of the floating gate. A drain electrode wiring conventionally connected through a well is directly connected to a drain diffusion area. This enables the redundancy ROM to be miniaturized and the voltage fall at the edge of a drain diffusion area to be reduced.