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:
Oct. 16, 2012
Filed:
May. 24, 2011
Hiroshi Mawatari, Yokohama, JP;
Hiroshi Mawatari, Yokohama, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
A semiconductor memory device comprises memory cells which includes a selection transistor and a memory transistor; selection gate lines coupled to a gate of the selection transistor; control gate lines coupled to the control gate of the memory transistor; source lines coupled to a source of the memory transistor; bit lines coupled to the selection transistor; a selection gate line driver circuit; a control gate line driver circuit; and a source line driver circuit, wherein the selection gate line driver circuit comprises a first transistor including a first gate insulation film and drives the selection gate line with a first driving voltage, and the control gate line driver circuit and the source line driver circuit comprises a second transistor including second gate insulation films and drives the control gate line and the source line with a boost voltage higher than the first driving voltage.