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US 11,309,484 B2Granted
PVDF piezoelectric reliability and electrode adhesion improvement
AssigneeLittelfuse, Inc.
InventorsYuriy B. Matus, Martin Pineda, Edward W. Rutter, Jr.
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Abstract
A device may include an inner layer comprising a polyvinylidene fluoride (PVDF) material. The device may also include a first interface layer, disposed on a first side of the inner layer, and a second interface layer, disposed on a second side of the inner layer. The first interface layer and the second interface layer may comprise a mixture of PVDF material and a scavenger component.
Claims18
A device, comprising:
- an inner layer comprising a polyvinylidene fluoride (PVDF) material;
- a first interface layer, disposed on a first side of the inner layer;
- a second interface layer, disposed on a second side of the inner layer, wherein the first interface layer and the second interface layer comprise a mixture of PVDF material and a scavenger component;
- and
- a first electrode, adjacent the first interface layer, and a second electrode, adjacent the second interface layer, wherein the first electrode and the first interface layer define a first electrode interface, wherein the second electrode and the second interface layer define a second electrode interface, wherein the first electrode interface and the second electrode interface comprise a first roughness and a second roughness, the first roughness and the second roughness being less than a thickness of the first interface layer and a thickness of the second interface layer, respectively, and being greater than 0.1 μm and less than 25 μm.
2 more elements
A method of forming a piezo-electric device, comprising:
- providing an inner layer comprising a polyvinylidene fluoride (PVDF) material;
- depositing a first coating on a first side of the inner layer;
- depositing a second coating on a second side of the inner layer, opposite the first layer, the first coating and the second coating comprising a scavenger component
- depositing a first electrode adjacent the first coating;
- and
- depositing a second electrode adjacent the second coating;
- wherein the first electrode and the first coating define a first electrode interface, wherein the second electrode and the second coating define a second electrode interface, wherein the first electrode interface and the second electrode interface comprise a first roughness and a second roughness, the first roughness and the second roughness being less than a thickness of the first coating and a thickness of the second coating, respectively, and being greater than 0.1 μm and less than 25 μm.
4 more elements
Dependencies are inferred from the claim text.