Textured glass articles and methods of making the same
AssigneeCorning Incorporated
InventorsYuhui Jin, Aize Li, Qiao Li, Wei Sun
Life of this patent
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Abstract
A glass article is provided that includes: a glass substrate comprising a thickness and a primary surface; and a textured region defined by the primary surface. The textured region comprises a plurality of sub-surface hillocks, each hillock having a top surface and a base, the base located below the primary surface of the substrate. The plurality of hillocks comprises an average lateral feature size from 0.1 μm to 3 μm and an average height from 5 nm to 200 nm. Further, the primary surface of the substrate is substantially planar.
Claims19
A glass article, comprising:
- a glass substrate comprising a thickness and a primary surface;
- and
- a textured region defined by the primary surface,
- wherein the textured region comprises a plurality of exposed, sub-surface hillocks, each hillock having a top surface and a base, the base located at a depth below the primary surface of the substrate,
- wherein the plurality of hillocks comprises an average lateral feature size from 0.1 μm to 3 μm and an average height from 5 nm to 200 nm,
- wherein the primary surface of the substrate is substantially planar, and
- further wherein the top surface of each of the hillocks is substantially planar and substantially parallel to the primary surface.
A glass article, comprising:
- a glass substrate comprising a thickness and a primary surface;
- and
- a textured region defined by the primary surface,
- wherein the textured region comprises a plurality of exposed, sub-surface hillocks, each hillock having a top surface and a base, the base located at a depth below the primary surface of the substrate,
- wherein the plurality of hillocks comprises an average lateral feature size from 0.1 μm to 3 μm and an average height from 5 nm to 200 nm,
- wherein the glass article comprises a sparkle of less than 1% as measured by pixel power distribution (PPD) with a 140 pixels per inch (PPI) light source,
- wherein the primary surface of the substrate is substantially planar, and
- further wherein the top surface of each of the hillocks is substantially planar, and substantially parallel to the primary surface.
A method of making a glass article, comprising:
- providing a glass substrate comprising a thickness and a primary surface;
- and
- submerging the glass substrate in a molten etchant bath for an etching duration of 10 minutes to 1000 minutes, the etchant bath at an etching temperature from 350° C. to 500° C.,
- wherein the etchant bath comprises (by weight):
- (a) 30% to about 48% KNO3;
- (b) 30% to about 48% NaNO3;
- (c) 3% to 10% K2CO3 or Na2CO3;
- and
- (d) 0.1% to 30% lithium salt,
- wherein the submerging is conducted to form a textured region in the glass substrate, and the textured region comprises a plurality of exposed, sub-surface hillocks, each hillock having a top surface and a base, the base located at a depth below the primary surface of the substrate,
- wherein the plurality of hillocks comprises an average lateral feature size from 0.1 μm to 3 μm and an average height from 5 nm to 200 nm,
- wherein the primary surface of the substrate is substantially planar, and
- further wherein the top surface of each of the hillocks is substantially planar and substantially parallel to the primary surface.
Dependencies are inferred from the claim text.