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. 03, 2009
Filed:
Nov. 02, 2007
Atsushi Inoue, Tokyo, JP;
Toshifumi Shano, Yokkaichi, JP;
Atsushi Inoue, Tokyo, JP;
Toshifumi Shano, Yokkaichi, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A nonvolatile semiconductor memory device including a memory cell array including a plurality of electrically rewritable nonvolatile memory cells arranged in series, the memory cell storing data using a plurality of threshold levels, a threshold level storage section storing a programming method switch threshold level on which a first programming method and a second programming method are switched, a comparison circuit comparing the programming method switch threshold level with a programming data threshold level and outputting a comparison result, a control signal generation circuit setting the first programming method or the second programming method based on the comparison result and outputting a control signal corresponding to the first programming method or the second programming method and a voltage generation circuit generating a programming voltage and an intermediate voltage which are applied to the memory cell based on the control signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile