Title:
RESONATOR AND MANUFACTURING METHOD THEREFOR, FILTER, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/087825
Kind Code:
A1
Abstract:
Provided are a resonator and a manufacturing method therefor, a filter, and an electronic device, relating to the field of resonators, and being capable of suppressing spurious harmonics of a resonator. The resonator comprises: a piezoelectric substrate, and an interdigital transducer arranged on the piezoelectric substrate. The piezoelectric substrate comprises, stacked in sequence, a substrate, a reflective layer, and a piezoelectric layer. The interdigital transducer comprises a first bus bar, a second bus bar, and multiple interdigital electrodes that are first interdigital electrodes and second interdigital electrodes alternately arranged in parallel between the first bus bar and the second bus bar. The first interdigital electrodes are connected to the first bus bar, and the second interdigital electrodes are connected to the second bus bar. The resonator also comprises first reflection grooves provided on the piezoelectric substrate. The first reflection grooves are positioned in the area between the first interdigital electrodes and the second bus bar.
Inventors:
BAO JINGFU (CN)
WU ZHAOHUI (CN)
LI YAWEI (CN)
LI XINYI (CN)
GAO ZONGZHI (CN)
WU ZHAOHUI (CN)
LI YAWEI (CN)
LI XINYI (CN)
GAO ZONGZHI (CN)
Application Number:
PCT/CN2020/123997
Publication Date:
May 05, 2022
Filing Date:
October 27, 2020
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03H9/145; H01P7/00; H03H3/08; H03H9/64; H03H9/72
Foreign References:
| CN110383682A | 2019-10-25 | |||
| JP2017224890A | 2017-12-21 | |||
| CN109075763A | 2018-12-21 | |||
| US20180212581A1 | 2018-07-26 | |||
| CN101595641A | 2009-12-02 |
Attorney, Agent or Firm:
BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)
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