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US 11,606,081 B2Granted
Filter device and method for manufacturing the same
AssigneeMurata Manufacturing Co., Ltd.
InventorYuichi Takamine
Life of this patent
Estimating the term…
Abstract
A filter device includes a substrate having piezoelectricity, a first filter including an IDT electrode disposed on the substrate, a terminal electrode disposed on the substrate, a first wiring electrode disposed on the substrate and connecting the first filter and a terminal electrode, and a dielectric film disposed above the substrate to cover the IDT electrode. At least a portion of the first wiring electrode is not covered with the dielectric film.
Claims11
A filter device comprising:
- a substrate having piezoelectricity;
- a first filter including an IDT electrode disposed on the substrate;
- a terminal electrode disposed on the substrate;
- a first wiring electrode disposed on the substrate and connecting the first filter and the terminal electrode;
- a dielectric film disposed above the substrate to cover the IDT electrode in the first filter;
- a second filter disposed on the substrate and including an IDT electrode different from the IDT electrode in the first filter;
- and
- a second wiring electrode disposed on the substrate and connecting the second filter and the terminal electrode;
- wherein
- at least a portion of the first wiring electrode is not covered with the dielectric film;
- the IDT electrode in the second filter is covered with the dielectric film, and at least a portion of the second wiring electrode is not covered with the dielectric film;
- and the portion of the first wiring electrode, the portion of the second wiring electrode, and the terminal electrode are surrounded by the dielectric film.
9 more elements
A filter device comprising:
- a substrate having piezoelectricity;
- a first filter including an acoustic wave device disposed on the substrate;
- a terminal electrode disposed on the substrate;
- a first wiring electrode disposed on the substrate and connecting the first filter and the terminal electrode;
- a dielectric film disposed above the substrate to cover the acoustic wave device in the first filter;
- a second filter disposed on the substrate and including an acoustic wave device different from the acoustic wave device in the first filter;
- and
- a second wiring electrode disposed on the substrate and connecting the second filter and the terminal electrode;
- wherein
- at least a portion of the first wiring electrode is not covered with the dielectric film;
- the acoustic wave device in the second filter is covered with the dielectric film, and at least a portion of the second wiring electrode is not covered with the dielectric film;
- and the portion of the first wiring electrode, the portion of the second wiring electrode, and the terminal electrode are surrounded by the dielectric film.
9 more elements
Dependencies are inferred from the claim text.