Title:
弾性波装置及びその製造方法
Document Type and Number:
Japanese Patent JP6493630
Kind Code:
B2
Abstract:
An elastic wave device includes a first band-pass filter on a piezoelectric substrate and including first IDT electrodes and a first dielectric film, and a second band-pass filter on the piezoelectric substrate and including second IDT electrodes and a second dielectric film. At least one pair among a pair of the first and second IDT electrodes and a pair of the first and second dielectric films has the same or substantially the same film thickness and is made of the same material. A relationship |Tx1−Rx1|/f1>|Tx2−Rx2|/f2 is satisfied. A weighted average of duty ratios of the first IDT electrodes is larger than a weighted average of duty ratios of the second IDT electrodes.
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Inventors:
Junpei Yasuda
Application Number:
JP2018537300A
Publication Date:
April 03, 2019
Filing Date:
August 29, 2017
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H03H9/145; H03H3/10; H03H9/64; H03H9/72
Domestic Patent References:
| JP2012175315A | ||||
| JP7283682A |
Foreign References:
| WO2015190178A1 | ||||
| WO2014208145A1 |
Attorney, Agent or Firm:
Patent business corporation Miya saki, table of contents patent office