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:
Jan. 01, 2002
Filed:
Nov. 13, 2000
Tatsuya Saeki, Hyogo, JP;
Hiroaki Nakai, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A power generating portion generates an erasing potential for an erasing operation with respect to information stored in a memory cell and variably generates a first potential applied to the selected memory cell and a second potential applied to the non-selected memory cell during a reading operation. A chip control portion selectively applies an erasing potential to every block to be erased. At the time, the chip control portion applies the first potential to any one of sectors in the block to be erased and also applies the second potential, which has been updated such that none of the memory cells belonging to the block to be erased is conductive, to the remaining sectors in the block to be erased for performing an erasing verify operation.