Acoustic wave device, front-end circuit, and communication apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorsKatsuya Matsumoto, Yasuyuki Ida
Life of this patent
Estimating the term…
Abstract
An acoustic wave device includes an element substrate having piezoelectricity, a functional electrode on a first main surface of the element substrate, an extended wiring line electrically connected to the functional electrode and extending from the first main surface to a side surface of the element substrate, an external terminal electrically connected to the extended wiring line and on a second main surface of the element substrate, a first resin portion to seal the acoustic wave device, and a second resin portion at least between the extended wiring line on the side surface and the first resin portion. The second resin portion has a lower Young's modulus than the first resin portion.
Claims20
An acoustic wave device comprising:
- an element substrate that includes a first main surface and a second main surface facing away from each other and a side surface connecting the first main surface and the second main surface to each other and that has piezoelectricity at least partially;
- a functional electrode that is provided on the first main surface of the element substrate;
- an extended wiring line that is electrically connected to the functional electrode and that extends from the first main surface to the side surface of the element substrate;
- an external terminal that is electrically connected to the extended wiring line and that is provided directly or indirectly on the second main surface of the element substrate;
- a first resin portion that seals the acoustic wave device;
- a second resin portion that is provided at least between the extended wiring line provided on the side surface and the first resin portion;
- and
- a third resin portion;
- wherein
- the second resin portion has a lower Young's modulus than the first resin portion;
- the element substrate includes a first corner portion that is a portion at which the second main surface adjoins the side surface;
- the extended wiring line extends from the side surface to the first corner portion and the second main surface;
- and
- the third resin portion is provided at least between the extended wiring line provided at the first corner portion and the first resin portion, and has a lower Young's modulus than the first resin portion.
An acoustic wave device comprising:
- an element substrate that includes a first main surface and a second main surface facing away from each other and a side surface connecting the first main surface and the second main surface to each other and that has piezoelectricity at least partially;
- a functional electrode that is provided on the first main surface of the element substrate;
- an extended wiring line that is electrically connected to the functional electrode and that extends from the first main surface to the side surface of the element substrate;
- an external terminal that is electrically connected to the extended wiring line and that is provided directly or indirectly on the second main surface of the element substrate;
- a first resin portion that seals the acoustic wave device;
- a second resin portion that is provided at least between the extended wiring line provided on the side surface and the first resin portion;
- and
- a third resin portion;
- wherein
- the second resin portion has a lower filler content than the first resin portion;
- the element substrate includes a first corner portion that is a portion at which the second main surface adjoins the side surface;
- the extended wiring line extends from the side surface to the first corner portion and the second main surface;
- and
- the third resin portion is provided at least between the extended wiring line provided at the first corner portion and the first resin portion, and has a lower Young's modulus than the first resin portion.
Dependencies are inferred from the claim text.