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US 8,168,514 B2Granted
Laser separation of thin laminated glass substrates for flexible display applications
AssigneeCorning Incorporated
InventorsSean Matthew Garner, Xinghua Li, Robert Stephen Wagner
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Abstract
A method of separating a sheet of coated brittle material comprises the steps of providing a sheet of layered brittle material comprising a brittle layer and a coating material adhered to a surface of the brittle layer and applying a laser along a separation line in the sheet, thereby cutting the coating material and separating the brittle layer by inducing a stress fracture therein.
Claims16
A method of separating a sheet of coated brittle material, the method comprising the steps of:
- providing a sheet of layered brittle material comprising a brittle layer having a thickness of less than or equal to about 300 μm and a coating material adhered to a surface of the brittle layer;
- and
- cutting the coating material and separating the brittle layer into separate pieces which are not connected to one another by applying a laser along a separation line on the sheet;
- wherein:
- (a) the brittle layer is a glass sheet, a ceramic sheet, or a glass ceramic sheet;
- (b) the separating comprises inducing a stress fracture within the brittle layer via the laser simultaneous with the cutting step;
- (c) the simultaneous cutting of the coating material and separating of the brittle layer into separate pieces is performed without mechanical contact with a scoring or cutting tool either prior to or during the applying of the laser along the separation line;
- and
- (d) as a result of the simultaneity of the cutting of the coating material and the separating of the brittle layer, substantial particulate debris does not remain along the separation line.
6 more elements
A method of forming a flexible substrate for a display application, the method comprising the steps of:
- providing a sheet of glass having a first planar surface and a second planar surface opposite the first planar surface;
- coating at least a select one of the first planar surface and the second planar surface with a polymer material, thereby creating a coated substrate;
- and
- applying a laser to the coated substrate of glass along a separation line separating a portion of the polymer material from the glass sheet and inducing a stress fracture within the sheet of glass, thereby cutting the coated substrate into separate pieces which are not connected to one another;
- wherein the coated substrate of glass is cut into the separate pieces without mechanical contact with a scoring or cutting tool either prior to or during the applying of the laser to the coated substrate of glass along the separation line.
2 more elements
Dependencies are inferred from the claim text.