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:
Aug. 31, 2010
Filed:
Apr. 26, 2007
Tokihiro Nishihara, Kawasaki, JP;
Shinji Taniguchi, Kawasaki, JP;
Masafumi Iwaki, Kawasaki, JP;
Tsuyoshi Yokoyama, Kawasaki, JP;
Takeshi Sakashita, Kawasaki, JP;
Masanori Ueda, Kawasaki, JP;
Yasuyuki Saitou, Yokohama, JP;
Tokihiro Nishihara, Kawasaki, JP;
Shinji Taniguchi, Kawasaki, JP;
Masafumi Iwaki, Kawasaki, JP;
Tsuyoshi Yokoyama, Kawasaki, JP;
Takeshi Sakashita, Kawasaki, JP;
Masanori Ueda, Kawasaki, JP;
Yasuyuki Saitou, Yokohama, JP;
Fujitsu Media Devices Limited, Yokohama, JP;
Taiyo Yuden Co., Ltd., Tokyo, JP;
Abstract
A filter includes piezoelectric thin-film resonators having a substrate, a lower electrode supported by the substrate, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. At least one of the piezoelectric thin-film resonators has a portion in which the upper electrode overlaps the lower electrode across the piezoelectric film. The above portion has a shape different from shapes of corresponding portions of other piezoelectric thin-film resonators, so that a spurious component in the above at least one of the piezoelectric thin-film resonators occur at a frequency different from frequencies of spurious components that occur in the other piezoelectric thin-film resonators.