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:
Jun. 21, 2011
Filed:
Dec. 14, 2007
Hiroyuki Nakamura, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Yukio Iwasaki, Osaka, JP;
Ken Matsunami, Osaka, JP;
Tetsuya Tsurunari, Osaka, JP;
Hiroyuki Nakamura, Osaka, JP;
Hidekazu Nakanishi, Osaka, JP;
Yukio Iwasaki, Osaka, JP;
Ken Matsunami, Osaka, JP;
Tetsuya Tsurunari, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides a surface acoustic wave resonator capable of improving a leak of a surface acoustic wave in the transverse direction and reducing the spurious and having superior characteristics. In a surface acoustic wave filter according to the present invention, an interdigital transducer electrode and reflector electrodes are formed on a piezoelectric substrate, and a SiOthin film is formed on at least a portion of the interdigital transducer electrode. The interdigital transducer electrode includes a bus-bar electrode region, a dummy electrode region and a finger overlap region, such that the SiOthin film is removed from upper sections of the bus-bar electrode regions of the interdigital transducer electrode.