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Title:
FILTER DEVICE AND METHOD FOR PRODUCING FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049830
Kind Code:
A1
Abstract:
This filter device (1) is provided with: a substrate (50) which has piezoelectricity; a first filter (10) which comprises an IDT electrode (52) that is provided on the substrate (50); an electrode (30a) for terminals, which is provided on the substrate (50); a first wiring electrode (41) which is provided on the substrate (50) and connects the first filter (10) and the electrode (30a) for terminals with each other; and a dielectric film (61) which is provided on the substrate (50) so as to cover the IDT electrode (52). At least a part of the first wiring electrode (41) is not covered by the dielectric film (61).

Inventors:
TAKAMINE, Yuichi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2018/032630
Publication Date:
March 14, 2019
Filing Date:
September 03, 2018
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H03H9/145; H03H3/08; H03H9/64
Attorney, Agent or Firm:
YOSHIKAWA, Shuichi et al. (6F Tanaka Ito Pia Shin-Osaka Bldg., 3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, 〒5320011, JP)
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