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:
May. 10, 2005
Filed:
Sep. 17, 2002
Akihiko Ebina, Fujimi-machi, JP;
Susumu Inoue, Sakata, JP;
Akihiko Ebina, Fujimi-machi, JP;
Susumu Inoue, Sakata, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A semiconductor device having memory cells. Each of the memory cells has a word gate formed over a semiconductor substrate with a first gate insulating layer interposed, an impurity layer, and first and second control gates in the shape of sidewalls. The first and second control gates adjacent to each other with the impurity layer interposed are connected to a common contact section. The common contact section includes a first contact conductive layer, a second contact conductive layer, and a pad-shaped third contact conductive layer. The third contact conductive layer is formed over the first and second contact conductive layers.