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Title:
ELASTIC WAVE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/018207
Kind Code:
A1
Abstract:
Provided is an elastic wave apparatus capable of reducing the area of a piezoelectric substrate surface and achieving downsizing. A longitudinally-coupled-resonator elastic wave filter 3 is provided on a piezoelectric substrate 2. IDT electrodes 11 to 13 of the longitudinally-coupled-resonator elastic wave filter 3 have first bus bars 11a, 12a, and 13a and second bus bars 11b, 12b, and 13b. An inorganic insulating layer is provided in at least one of directions orthogonal to an elastic wave propagation direction so as to cover the plurality of first bus bars 11a, 12a, and 13a or the plurality of second bus bars 11b, 12b, and 13b, and a first wiring line 18 is arranged on the inorganic insulating layer to extend in the elastic wave propagation direction. A second wiring line 19 three-dimensionally intersects the first wiring line 18 via the inorganic insulating layer. The first wiring line 18 penetrates the inorganic insulating layer, and is connected to bus bars connected to the same potential.

Inventors:
OKUDE, Takayuki (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2016/070593
Publication Date:
February 02, 2017
Filing Date:
July 12, 2016
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
Domestic Patent References:
WO2006009021A12006-01-26
Foreign References:
JP2007174307A2007-07-05
JPH05235684A1993-09-10
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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