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Patent Searching and Data


Title:
ACOUSTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/042964
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an acoustic wave device capable of suppressing unwanted spurious signals while being compact in size. Provided is an acoustic wave device comprising: a piezoelectric substrate 2; a first acoustic wave element 5 having at least one first IDT electrode 10 provided on the piezoelectric substrate 2; a second acoustic wave element 6 having at least one second IDT electrode 11 provided on the piezoelectric substrate 2; and a dielectric film 20 covering the first and second IDT electrodes 10, 11. The first and second acoustic wave elements 5, 6 are adjacent to each other in the acoustic wave propagation direction, and a slit 9 is provided in the dielectric film 20 between the first and second acoustic wave elements 5, 6. The first and second IDT electrodes 10, 11 each have an intersection region, and when viewed from the acoustic wave propagation direction, the slit 9 is arranged in a region overlapping with at least a portion of at least one of the intersection regions of the first and second IDT electrodes 10, 11.

Inventors:
OKUDE, Takayuki (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2017/027227
Publication Date:
March 08, 2018
Filing Date:
July 27, 2017
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; H03H9/64
Foreign References:
JP2008079227A2008-04-03
JPH09232908A1997-09-05
JPH0716427U1995-03-17
JP2010232794A2010-10-14
JP2000106519A2000-04-11
JP2008118576A2008-05-22
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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