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:
Feb. 06, 1996
Filed:
Sep. 16, 1994
Kikuzo Sawada, Tokyo, JP;
Yoshikazu Sugawara, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
The electrically rewritable nonvolatile semiconductor memory device includes a plurality of memory cells arranged in rows and columns, a decoder circuit for selecting at least one of the plurality of memory cells, a writing circuit for writing data in the selected memory cell through the decoder circuit, a reading circuit for reading the data from the selected memory cell, a detecting circuit for detecting a change of the threshold voltage of each of the non-selected memory cells, which change is caused by a voltage applied to the non-selected memory cell when writing the data in the selected memory cell, and a restoring circuit for restoring the threshold voltage of the non-selected memory cell a value equal to or near to its original value on the basis of the result of the above detection.