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:
Sep. 22, 2009
Filed:
May. 21, 2004
Mitsuhiro Noguchi, Yokohama, JP;
Akira Goda, Yokohama, JP;
Masayuki Tanaka, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory having an electrically writable/erasable memory cell includes a first gate insulating layer made from a compound containing silicon and oxygen; a first charge-storage layer being in contact with the first gate insulating layer made from a silicon nitride film, a silicon oxynitride film, or an alumina film; a second insulating layer thicker than the first gate insulting layer; a second charge-storage layer being in contact with the second insulating layer; a third insulating layer thicker than the first gate insulating layer being in contact with the second charge-storage layer; and a control electrode upon the third insulating layer.