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:
Oct. 13, 2009
Filed:
Apr. 21, 2006
Haruhiko Fujimoto, Fukushima-ken, JP;
Kyosuke Ozaki, Fukushima-ken, JP;
Satoshi Waga, Fukushima-ken, JP;
Toshihiro Meguro, Fukushima-ken, JP;
Takeshi Ikeda, Fukushima-ken, JP;
Haruhiko Fujimoto, Fukushima-ken, JP;
Kyosuke Ozaki, Fukushima-ken, JP;
Satoshi Waga, Fukushima-ken, JP;
Toshihiro Meguro, Fukushima-ken, JP;
Takeshi Ikeda, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
First base layers made of TiN or TiON(where, 0<x<0.2, x+y=1) and second base layers made of Cr are provided between interdigital transducer portions and a piezoelectric substrate, and accordingly, it is possible to prevent voids from being generated in the interdigital transducer portions, which improves a power resistance of the surface acoustic wave device. In addition, since it is possible to prevent the voids from being generated in the interdigital transducer portions, it is possible to suppress the resistance of the interdigital transducer portions from increasing, which can reduce the loss of power. In addition, it is also possible to reduce the variations in a serial resonance frequency and a parallel resonance frequency.