Title:
ELASTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/250572
Kind Code:
A1
Abstract:
Provided is an elastic wave device less likely to experience surge destruction. A dielectric film 4 is provided so as to cover an IDT electrode 3. The IDT electrode 3 has: a first and a second edge region E1, E2, which are low-speed-of-sound regions; and a first and a second high-speed-of-sound region H1, H2 which are provided further outside than an intersection width region in which a first electrode finger 13 and a second electrode finger 14 are adjacent to one another in an elastic wave propagation direction. The thickness of the dielectric film 4 over the first and second edge regions E1, E2 is greater than that over the first and second high-speed-of-sound regions H1, H2.
Inventors:
UESAKA KENICHI (JP)
Application Number:
PCT/JP2020/017220
Publication Date:
December 17, 2020
Filing Date:
April 21, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/145
Domestic Patent References:
| WO2019049893A1 | 2019-03-14 |
Foreign References:
| JP2019080093A | 2019-05-23 | |||
| JP2013544041A | 2013-12-09 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
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