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. 16, 1999
Filed:
Feb. 03, 1998
Applicant:
Inventors:
Shigemitsu Fukatsu, Okazaki, JP;
Tsutomu Kawaguchi, Nagoya, JP;
Takuya Okuno, Nukata-gun, JP;
Yukiaki Yogo, Nukata-gun, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257315 ; 257316 ; 257324 ;
Abstract
A floating gate of a semiconductor memory device has a gate bird beak on an end portion thereof. Further, a positional relationship between the floating gate and a drain is controlled such that a depletion layer formed within the drain in a non-selected state of the semiconductor memory device faces the gate bird beak without interposing the drain therebetween. Accordingly, drain disturbance can be efficiently prevented.