Oleophobic glass substrates
AssigneeCorning Incorporated
InventorPrantik Mazumder
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Abstract
A glass substrate having an oleophobic surface. The surface is substantially free of features that form a reentrant geometry and includes a plurality of gas-trapping features extending from the surface to a depth below the surface and a coating comprising at least one of a fluoropolymer and a fluorosilane. The gas-trapping features are substantially isolated from each other, and trap gas below droplets to prevent wetting of the surface.
Claims27
A glass substrate comprising an oleophobic surface,
- wherein the oleophobic surface is substantially free of features that form a reentrant geometry and comprises a plurality of gas-trapping features,
- wherein the plurality of gas-trapping features are open to the oleophobic surface and extend to a depth below the oleophobic surface, and are isolated from each other, and
- wherein the oleophobic surface comprises an open fraction of at least 0.4.
A glass substrate having an oleophobic surface, the oleophobic surface comprising:
- a. a surface, wherein the surface is substantially free of features that form a reentrant geometry, and wherein the surface has an open fraction of at least 0.40;
- b. a plurality of gas-trapping features, wherein each of the gas-trapping features is open to the surface and extends to a depth below the surface, and wherein the features are isolated from each other;
- and
- c. a coating disposed on the surface and the plurality of gas trapping features, the coating comprising at least one of a low surface energy fluoropolymer and a low surface energy fluorosilane.
A method of making a glass substrate having an oleophobic surface, the method comprising the steps of:
- a. providing a glass substrate having a surface;
- b. forming a plurality of gas-trapping features in the surface, wherein each of the gas-trapping features is open to the surface and extends to a depth below the surface, wherein the features are isolated from each other, and wherein the surface has an open fraction of at least 0.40 after forming the plurality of gas-trapping features;
- and
- c. coating the surface and the plurality of gas trapping features with at least one of a low surface energy fluoropolymer and a low surface energy fluorosilane to form the oleophobic surface on the glass substrate.
Dependencies are inferred from the claim text.