Title:
弾性波装置
Document Type and Number:
Japanese Patent JP6477721
Kind Code:
B2
Abstract:
An elastic wave device includes a low acoustic velocity film, a piezoelectric film, and an IDT electrode, which are laminated on a high acoustic velocity material. In the IDT electrode, first electrode fingers, or second electrode fingers, or each of the first electrode fingers and the second electrode fingers, includes a wide width portion with a dimension in a width direction larger than a dimension at a center in a length direction and being provided closer to at least one of a side of a proximal end and a side of a distal end than a central region, at least one of a first busbar and a second busbar includes cavities arranged in a busbar length direction, and at least one of the first busbar and the second busbar includes an inner busbar portion which is positioned closer to a side of the first electrode fingers or a side of the second electrode fingers than the cavities are and which extends in the length direction of the first busbar and the second busbar, a central busbar portion that includes the cavities, and an outer busbar portion.
Inventors:
Hideki Iwamoto
Keiji Okada
Yuichi Takamine
Taka Tsutomu I
Keiji Okada
Yuichi Takamine
Taka Tsutomu I
Application Number:
JP2016561456A
Publication Date:
March 06, 2019
Filing Date:
October 22, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H03H9/145; H03H9/25
Domestic Patent References:
| JP2013518455A | ||||
| JP2002314366A | ||||
| JP2010206843A | ||||
| JP2012120138A | ||||
| JP2006319679A | ||||
| JP2007150931A |
Foreign References:
| WO2012086639A1 | ||||
| WO2011046117A1 | ||||
| WO2006114922A1 |
Attorney, Agent or Firm:
Patent business corporation Miya saki, table of contents patent office