Surface Acoustic Wave Device
AssigneeKYOCERA Corporation
InventorMasahisa Shimozono
Life of this patent
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Abstract
A SAW device 1 has a substrate 3 and a filter 9 provided at the substrate 3. The filter 9 has a plurality of IDT electrodes 15 arranged along a propagation direction of a SAW. Each of the plurality of IDT electrodes 15 has an electrode finger group including a plurality of electrode fingers 19f which extent in a direction orthogonal to the propagation direction and are arranged along the propagation direction. At least one of the plurality of IDT electrodes 15 has a wide pitch section 25 including an adjacent first and second electrode finger among the plurality of electrode fingers 19. The interval between the first electrode finger and the second electrode finger is larger than the average value of the intervals between the remaining electrode fingers of the plurality of electrode fingers 19f.
Claims8
A surface acoustic wave device, comprising:
- a piezoelectric substrate and a surface acoustic wave filter comprising a plurality of IDT electrodes which are provided on the piezoelectric substrate and are arranged along a propagation direction of a surface acoustic wave, wherein
- each of the plurality of IDT electrodes comprises a group of electrode fingers which extend in a direction orthogonal to the propagation direction and which are arranged along the propagation direction spaced apart from each other at predetermined intervals,
- a first IDT electrode included in the plurality of IDT electrodes comprises a first wide pitch section including first and second electrode fingers adjacent to each other in the group of electrode fingers, and an interval between the first electrode finger and the second electrode finger is larger than an average value of intervals of the remaining electrode fingers in the group of electrode fingers.
A surface acoustic wave device, comprising:
- a piezoelectric substrate and
- a surface acoustic wave filter comprising a plurality of IDT electrodes which are provided on the piezoelectric substrate and are arranged along a propagation direction of a surface acoustic wave, wherein
- each of the plurality of IDT electrodes comprises a group of electrode fingers which extend in a direction orthogonal to the propagation direction and which are arranged along the propagation direction spaced apart from each other at predetermined intervals,
- at least one of the plurality of IDT electrodes comprises a wide pitch section including a fifth electrode finger, which is one finger in the group of electrode fingers, and sixth and seventh electrode fingers which are adjacent to the two sides of the fifth electrode finger, and a interval between the fifth electrode finger and the sixth electrode finger and a interval between the fifth electrode finger and the seventh electrode finger are larger than the average value of intervals of the remaining electrode fingers in the group of electrode fingers.
Dependencies are inferred from the claim text.