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:
Apr. 11, 2006
Filed:
Oct. 21, 2003
Haruhiko Fujimoto, Niigata-ken, JP;
Satoshi Waga, Niigata-ken, JP;
Takashi Sato, Niigata-ken, JP;
Kyosuke Ozaki, Niigata-ken, JP;
Yutaka Matsuo, Fukushima-ken, JP;
Takeshi Ikeda, Niigata-ken, JP;
Kazuaki Kaneko, Niigata-ken, JP;
Takuo Kudo, Niigata-ken, JP;
Haruhiko Fujimoto, Niigata-ken, JP;
Satoshi Waga, Niigata-ken, JP;
Takashi Sato, Niigata-ken, JP;
Kyosuke Ozaki, Niigata-ken, JP;
Yutaka Matsuo, Fukushima-ken, JP;
Takeshi Ikeda, Niigata-ken, JP;
Kazuaki Kaneko, Niigata-ken, JP;
Takuo Kudo, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A surface acoustic wave device includes a piezoelectric substrate and an electrode section, disposed on the piezoelectric substrate, having a thin-film structure. The electrode section includes interdigital electrodes and junction electrodes connected to the interdigital electrodes. The interdigital electrodes each include corresponding first base layers containing Ta and Cu layers or Cu—M alloy layers each disposed on the corresponding first base layers, wherein M represents one or more elements selected from the group consisting of Ag, Sn, and C.