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US 10,471,468 B2Granted
Omniphobic surface for use in user interface device
AssigneeNokia Technologies Oy
InventorsChris Bower, Paul Beecher
Life of this patent
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Abstract
An apparatus including a durable porous substrate; and a perfluorinated liquid located within pores of the durable porous substrate. The durable porous substrate and the perfluorinated liquid together are configured to provide an omniphobic surface.
Claims10
An apparatus, comprising:
- a durable porous substrate having an elastic modulus of between 10 GPa and 200 GPa and comprising a multiplicity of tapered pillars formed with a surface of the durable porous substrate, wherein the durable porous substrate comprises a plurality of nanoparticles, each of the plurality of nanoparticles having a mean largest dimension between 10 nm and 250 μm;
- and
- a perfluorinated liquid located within pores of the durable porous substrate, wherein the perfluorinated liquid is a fluoropolymer, the durable porous substrate and the perfluorinated liquid together configured to provide an omniphobic surface having an optical transmission of between 90% and 100%;
- wherein the durable porous substrate and the perfluorinated liquid define a display screen;
- wherein the display screen is self-repairing;
- wherein the perfluorinated liquid is reflowable within the pores of the porous substrate to lower the surface energy of the porous substrate such that the omniphobic surface causes a liquid droplet to have a contact angle of greater than 90 degrees with the omniphobic surface;
- wherein the durable porous substrate and the perfluorinated liquid form the omniphobic surface having a Fresnel reflectivity that is less than a Fresnel reflectivity of the durable porous substrate alone to provide a substantially transparent and anti-reflective surface;
- and
- wherein the durable porous substrate comprises glass, and the fluoropolymer comprises fluoroacrylate polymer.
6 more elements
A method, comprising:
- providing a durable porous substrate having an elastic modulus of between 10 GPa and 200 GPa and comprising a multiplicity of tapered pillars formed with a surface of the durable porous substrate, wherein the durable porous substrate comprises a plurality of nanoparticles, each of the plurality of nanoparticles having a mean largest dimension between 10 nm and 250 μm;
- and
- locating a perfluorinated liquid within pores of the durable porous substrate, wherein the perfluorinated liquid is a fluoropolymer, the durable porous substrate and the perfluorinated liquid together configured to provide an omniphobic surface having an optical transmission of between 90% and 100%;
- lowering the surface energy of the porous substrate based on reflow of the perfluorinated liquid within the pores of the durable porous substrate such that the omniphobic surface causes a liquid droplet to have a contact angle of greater than 90 degrees with the omniphobic surface;
- wherein the durable porous substrate and the perfluorinated liquid define a display screen;
- wherein the display screen is self-repairing;
- wherein the durable porous substrate and the perfluorinated liquid form the omniphobic surface having a Fresnel reflectivity that is less than a Fresnel reflectivity of the durable porous substrate alone to provide a substantially transparent and anti-reflective surface;
- and
- wherein the durable porous substrate comprises glass, and the fluoropolymer comprises fluoroacrylate polymer.
6 more elements
Dependencies are inferred from the claim text.