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:
Jun. 09, 1987
Filed:
Jun. 19, 1985
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; G11C / ;
U.S. Cl.
CPC ...
357 335 ; 357 2311 ; 357 54 ; 357 59 ; 357 91 ; 365185 ;
Abstract
A nonvolatile semiconductor memory device including at least one memory cell which comprises a floating-gate, a control gate and a single impurity diffusion region formed exclusively for the memory cell. In this device, a small depletion region and a large depletion region due to the charged and discharged state of the floating-gate represent the information '1' and '0'.