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Title:
ELASTIC WAVE FILTER AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/060444
Kind Code:
A1
Abstract:
This elastic wave filter comprises a first chip and a second chip electrically connected to the first chip. Each of the chips includes a support substrate, a plurality of acoustic films, a piezoelectric film, and an excitation electrode which are successively disposed in stacked layers. The plurality of acoustic films are successively stacked on the support substrate, and have mutually different materials between overlapping acoustic films.

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Inventors:
ITO MOTOKI (JP)
Application Number:
PCT/JP2020/036201
Publication Date:
April 01, 2021
Filing Date:
September 25, 2020
Export Citation:
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Assignee:
KYOCERA CORP (JP)
International Classes:
H03H9/25; H03H9/64; H03H9/72
Domestic Patent References:
WO2019054364A12019-03-21
WO2019009246A12019-01-10
WO2013128636A12013-09-06
Foreign References:
JP2016510963A2016-04-11
Attorney, Agent or Firm:
IIJIMA, YASUHIRO (JP)
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