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. 18, 2008
Filed:
Aug. 23, 2005
Hiroyuki Tanaka, Kyoto, JP;
Kiyohiro Iioka, Kyoto, JP;
Hiroyuki Tanaka, Kyoto, JP;
Kiyohiro Iioka, Kyoto, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A surface acoustic wave apparatus comprises a piezoelectric substrateon the bottom face of which IDT electrodesandand an annular ground electrodewhich encloses the IDT electrodesandand is connected to the IDT electrode, and a base substrate on the top face of which an annular ground conductoris formed and which has an internal ground conductor layerand a bottom face ground conductor layerconnected to the annular ground conductorand an internal ground conductor layerand a bottom face ground conductor layerconnected to the IDT electrode. A first ground conductor composed of the internal ground conductor layerand the bottom face ground conductor layeris electrically separated from a second ground conductor composed of the internal ground conductor layerand the bottom face ground conductor layer. The apparatus has an excellent out-of-band attenuation characteristic.