Title:
ACOUSTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/103953
Kind Code:
A1
Abstract:
Provided is an acoustic wave device which is not prone to ripples occurring in a pass band. The acoustic wave device 1 is an acoustic wave device 1 having a piezoelectric film 6, said acoustic wave device being provided with: a high-acoustic-velocity member in which the acoustic velocity of a bulk wave propagating therethrough is higher than the acoustic velocity of an acoustic wave of the main mode propagating through the piezoelectric film 6; the piezoelectric film 6, which is layered directly or indirectly on the high-acoustic-velocity member; a first conductive film provided on the piezoelectric film 6, and a second conductive film provided on the piezoelectric film 6 and on at least a portion of the first conductive film. A plurality of IDT electrodes comprising electrode fingers and bus bars are provided on the piezoelectric film 6, with at least the electrode fingers of the plurality of IDT electrodes 8 being constituted by the first conductive film, and at least a portion of connection wiring connecting the plurality of IDT electrodes 8 being constituted by the second conductive film.
Inventors:
TAKAMINE YUICHI (JP)
YAMANE TAKASHI (JP)
YAMANE TAKASHI (JP)
Application Number:
PCT/JP2015/081771
Publication Date:
June 30, 2016
Filing Date:
November 11, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145; H03H9/64
Domestic Patent References:
| WO2012086639A1 | 2012-06-28 |
Foreign References:
| JP2000183679A | 2000-06-30 | |||
| JP2009182407A | 2009-08-13 | |||
| JP2002290182A | 2002-10-04 | |||
| JPS5643818A | 1981-04-22 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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