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US 12,401,339 B2Granted
Surface-acoustic-wave (SAW) filter with dielectric material disposed in a piezoelectric layer
AssigneeRF360 Singapore Pte. Ltd.
InventorsMichael Merker, Stefan Ammann, Marc Esquius Morote, Matthias Pernpeintner
Life of this patent
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Abstract
An apparatus is disclosed for implementing a surface-acoustic-wave (SAW) filter with dielectric material disposed in a piezoelectric layer. In an example aspect, the apparatus includes a surface-acoustic-wave filter with a piezoelectric layer, an electrode structure, and dielectric material. The piezoelectric layer has at least one channel. The dielectric material is disposed in the at least one channel of the piezoelectric layer and is at least partially covered by the electrode structure.
Claims24
An apparatus comprising:
- a surface-acoustic-wave filter comprising:
- a piezoelectric layer having a plurality of segmented channels;
- an electrode structure comprising multiple fingers;
- and
- dielectric material disposed in each segmented channel of the plurality of segmented channels of the piezoelectric layer, the dielectric material in each segmented channel of the plurality of segmented channels at least partially covered by a corresponding finger of the multiple fingers of the electrode structure, wherein each segmented channel of the plurality of segmented channels extends laterally beyond the corresponding finger of the multiple fingers.
2 more elements
An apparatus comprising:
- a piezoelectric layer configured to propagate an acoustic wave along a first axis, the piezoelectric layer having a plurality of segmented recessed areas with a longitudinal axis that is substantially parallel to the first axis;
- an electrode structure comprising multiple fingers;
- and
- dielectric material positioned in the plurality of segmented recessed areas, the dielectric material having at least one surface exposed, the dielectric material in each segmented recessed area at least partially covered by a corresponding finger of the multiple fingers of the electrode structure, wherein each segmented recessed area of the plurality of segmented recessed areas extends laterally beyond the corresponding finger of the multiple fingers.
1 more element
Dependencies are inferred from the claim text.