Invention Grant
- Patent Title: Surface acoustic wave device
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Application No.: US16529879Application Date: 2019-08-02
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Publication No.: US11043932B2Publication Date: 2021-06-22
- Inventor: Koichiro Kawasaki
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Nagaokakyo
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Nagaokakyo
- Agency: Keating & Bennett, LLP
- Priority: JPJP2017-018685 20170203
- Main IPC: H03H9/10
- IPC: H03H9/10 ; H03H9/25 ; H03H9/64 ; H03H9/02 ; H03H9/05 ; H03H9/145 ; H03H9/68 ; H03H9/72 ; H03H9/54

Abstract:
A surface acoustic wave device includes a piezoelectric substrate, functional elements on the piezoelectric substrate, a cover portion that opposes the piezoelectric substrate with a support layer interposed therebetween, and an input/output terminal on the cover portion. At least a portion of the functional elements includes an interdigital transducer electrode, and a surface acoustic wave resonator is defined by the piezoelectric substrate and the IDT electrode. The functional elements include a filter that passes a signal in a predetermined frequency band, and a cancel circuit which is connected in parallel to the filter and attenuates a signal outside the predetermined frequency band in signals output from the output terminal. A portion of a wiring pattern connecting a first functional element and a second functional element included in the plurality of functional elements is provided on the cover portion.
Public/Granted literature
- US20190356299A1 SURFACE ACOUSTIC WAVE DEVICE Public/Granted day:2019-11-21
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