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Patent Searching and Data


Title:
ACOUSTIC WAVE FILTER DEVICE AND COMPOSITE FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049823
Kind Code:
A1
Abstract:
Provided is an acoustic wave filter device which has excellent linearity, and which has a structure wherein layers are laminated between a substrate that is formed from a semiconductor and a piezoelectric layer, said layers being composed of a different material. An acoustic wave filter device which comprises a plurality of acoustic wave resonators; and each one of the acoustic wave resonators comprises a piezoelectric layer 16 and an IDT electrode 17 which is provided on the piezoelectric layer 16. A low acoustic velocity film 15 and a substrate 14 that is formed from a semiconductor are laminated on a surface of the piezoelectric layer 16, said surface being on the reverse side of the surface on which the IDT electrode 17 is provided; and a routing wire 13, which is connected to an antenna terminal 3, is arranged on an insulating film 12 that is provided on the piezoelectric layer 16.

Inventors:
TAKAMINE, Yuichi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2018/032601
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:
H03H9/25; H03H9/145; H03H9/17; H03H9/64; H03H9/72
Domestic Patent References:
WO2017085976A12017-05-26
WO2017043427A12017-03-16
Foreign References:
JP2016208367A2016-12-08
JP2015041680A2015-03-02
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (Chuo Odori FN Bldg, 3-8 Tokiwamachi 1-chome, Chuo-ku, Osaka-sh, Osaka 28, 〒5400028, JP)
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