Bulk acoustic wave resonator comprising bridge formed within piezoelectric layer
First Claim
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1. A bulk acoustic wave (BAW) resonator structure, comprising:
- a first electrode disposed over a substrate;
a piezoelectric layer disposed over the first electrode;
a second electrode disposed over the piezoelectric layer; and
a bridge buried within the piezoelectric layer, wherein the bridge defines at least a portion of a perimeter along an active region of the BAW resonator structure.
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Abstract
A bulk acoustic wave (BAW) structure includes a first electrode disposed over a substrate, a piezoelectric layer disposed over the first electrode, and a second electrode disposed over the first piezoelectric layer. A bridge is formed within the piezoelectric layer, where the bridge is surrounded by piezoelectric material of the piezoelectric layer.
470 Citations
20 Claims
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1. A bulk acoustic wave (BAW) resonator structure, comprising:
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a first electrode disposed over a substrate; a piezoelectric layer disposed over the first electrode; a second electrode disposed over the piezoelectric layer; and a bridge buried within the piezoelectric layer, wherein the bridge defines at least a portion of a perimeter along an active region of the BAW resonator structure. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bulk acoustic wave (BAW) resonator structure, comprising:
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a first electrode disposed over a substrate; a first piezoelectric layer disposed over the first electrode; a second electrode disposed over the first piezoelectric layer; a second piezoelectric layer disposed over the second electrode; a third electrode disposed over the second piezoelectric layer; and a first bridge buried within one of the first piezoelectric layer and the second piezoelectric layer. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A bulk acoustic wave (BAW) resonator structure, comprising:
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a first BAW resonator comprising a first electrode, a first piezoelectric layer disposed over the first electrode, and a second electrode disposed over the first piezoelectric layer; an acoustic coupling layer disposed over the second electrode of the first BAW resonator, wherein the acoustic coupling layer is configured to determine pass-band characteristics of the BAW resonator structure; a second BAW resonator comprising a third electrode disposed over the acoustic coupling layer, a second piezoelectric layer disposed over the third electrode, and a fourth electrode disposed over the second piezoelectric layer; and a first bridge buried within one of the first piezoelectric layer of the first BAW resonator and the second piezoelectric layer of the second BAW resonator. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification