Title:
ELASTIC WAVE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2017/199485
Kind Code:
A1
Abstract:
Provided is an elastic wave apparatus that has high ESD resistance and can reduce insertion loss.
An elastic wave apparatus 1 is provided with: a piezoelectric substrate 2 and an IDT electrode 3. The IDT electrode 3 includes a pair of bus bars 4a and 4b facing each other, a plurality of electrode fingers 5a and 5b, and a plurality of dummy electrode fingers 6a and 6b. The width of a leading end of at least one of the electrode fingers 5a and 5b and the dummy electrode fingers 6a and 6b is narrower than the width of the rest portion of the electrode finger 5a, 5b or the dummy electrode finger 6a, 6b to which the leading end belongs. A first straight line that passes through the center at the leading end of the electrode finger 5a, 5b in its width direction and that is parallel to the direction in which the electrode finger 5a, 5b extends, and a second straight line that passes through the center at the leading end of the dummy electrode finger 6a, 6b in its width direction and that is parallel to the direction in which the dummy electrode finger 6a, 6b extends are present at different positions in an elastic wave propagation direction, the dummy electrode finger 6a, 6b facing the electrode finger 5a, 5b through which the first straight line passes.
Inventors:
NAKAMURA SHINICHI (JP)
Application Number:
PCT/JP2017/004749
Publication Date:
November 23, 2017
Filing Date:
February 09, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145
Domestic Patent References:
| WO2006078001A1 | 2006-07-27 |
Foreign References:
| JP2015222886A | 2015-12-10 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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