Title:
FILTER, MULTIPLEXER, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/152178
Kind Code:
A1
Abstract:
Disclosed in the present invention are a filter, a duplexer, a multiplexer, and an electronic device. In the embodiments of the present invention, at least two resonators in a filter have a dual-layer bottom electrode structure, and an electrical isolation trench is provided on a first bottom electrode of at least one resonator, such that an MIM capacitor is formed between the first bottom electrode and a second bottom electrode of the resonator, and the MIM capacitor is integrated at a specific position of the filter having a ladder-shaped structure by means of a specific connection manner, thus an integrated capacitor filter chip is implemented without increasing layers and the area of the chip.
Inventors:
BIAN ZIPENG (CN)
PANG WEI (CN)
PANG WEI (CN)
Application Number:
PCT/CN2022/071653
Publication Date:
July 21, 2022
Filing Date:
January 12, 2022
Export Citation:
Assignee:
ROFS MICROSYSTEM TIANJIN CO LTD (CN)
International Classes:
H03H9/17
Foreign References:
| CN113162578A | 2021-07-23 | |||
| CN111355463A | 2020-06-30 | |||
| US20130270966A1 | 2013-10-17 |
Attorney, Agent or Firm:
CHINA SMART INTELLECTUAL PROPERTY LTD. (CN)
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