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:
Aug. 25, 2009
Filed:
Jan. 31, 2007
Kohji Kanamori, Kanagawa, JP;
Kenichi Kuboyama, Kanagawa, JP;
Kohji Kanamori, Kanagawa, JP;
Kenichi Kuboyama, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, JP;
Abstract
A programmable non-volatile semiconductor memory device includes a select gate, arranged in a first region on a substrate, a floating gatearranged in a second region neighboring to the first region, a first diffusion regionprovided in a third region neighboring to the second region, a control gatearranged on the floating gate, and a driving circuitadapted for controlling voltages applied to the substrate(well), select gate, first diffusion regionand control gateThe driving circuit performs control so that, during erasure operation, voltages applied to select gateand the control gateare negative, with the remaining voltage, applied to the substrate(or well), being positive. The device permits erasure operation at a lower voltage.