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:
Sep. 16, 1986
Filed:
Apr. 09, 1985
Applicant:
Inventors:
Fujio Masuoka, Yokohama, JP;
Hisakazu Iizuka, Yokohama, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
427 91 ; 427 88 ; 148D / ;
Abstract
An erase gate is formed for erasing data from a floating gate in a semiconductor memory device having the floating gate and a control gate. Furthermore, in order to achieve electrical insulation between the erase gate and the control gate, an insulating film formed between the erase gate and the control gate is made thicker than an insulating film formed between the floating gate and the erase gate.