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. 07, 2000
Filed:
Nov. 03, 1998
Yuichi Kunori, Hyogo, JP;
Atsushi Ohba, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Source line select transistors are provided corresponding to word lines. The source line select transistors are turned on in response to signal voltages on the corresponding word lines to connect a main source line to corresponding sub-source lines. The sub-source lines are arranged corresponding to sets of word lines. Programming/erasing are performed by using channel hot electrons and a Fowler-Nordheim current, by applying voltages to the word lines and the bit lines such that an excessive voltage may not be transmitted from the main source line to the sub-source line. Memory cell data can be precisely read out without an influence by a leak current of an over-erased or over-programmed memory cell.