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. 20, 1994
Filed:
Jun. 17, 1993
Applicant:
Inventors:
Seiji Yamada, Tokyo, JP;
Masamitsu Oshikiri, Sagamikara, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365185 ; 36518901 ;
Abstract
A nonvolatile semiconductor memory device comprises a memory cell array including memory cell transistors having a lamination gate structure are arranged in a matrix manner at the position where a word line and a bit line cross each other. A lower voltage than a threshold voltage is applied to the word line selected at the time of a reading mode in a state that no electrical charge is stored in the floating gate.