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US 6,810,688 B1Granted
Method for treating glass substrates and glass substrates for the producing of display screens
AssigneeSaint-Gobain Glass France
InventorsGéraldine Duisit, Olivier Gaume, René Gy
Life of this patent
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Abstract
The subject of the invention is a process for treating a glass sheet which consists of a glass composition having a strain point above 540° C. and is intended for producing a display screen, the said process including at least one ion-exchange treatment on at least part of the surface of the glass sheet and a precontraction treatment.
Claims12
A process for treating a glass sheet, which comprises:
- subjecting a glass sheet having a strain point above 540° C. simultaneously to at least one ion-exchange treatment on at least part of the surface of the glass sheet and a precompaction treatment, thereby producing a display screen, wherein the glass composition comprises the constituents below, in the following proportions by weight:
- SiO2 40 to 75% Al2O3 0 to 12% Na2O 0 to 9% K2O 3.5 to 10% MgO 0 to 10% CaO 2 to 11% SrO 0 to 11% BaO 0 to 17% ZrO2 2 to 8%.
A process for treating a glass sheet, which comprises:
- subjecting a glass sheet having a strain point above 540° C. to at least one ion-exchange treatment on at least part of the surface of the glass sheet by depositing, on at least part of the surface of the glass sheet, a paste comprising a potassium salt and a compound having a high melting point and a precompaction treatment, thereby producing a display screen, wherein the glass composition comprises the constituents below, in the following proportions by weight:
- SiO2 40 to 75% Al2O3 0 to 12% Na2O 0 to 9% K2O 3.5 to 10% MgO 0 to 10% CaO 2 to 11% SrO 0 to 11% BaO 0 to 17% ZrO2 2 to 8%.
Dependencies are inferred from the claim text.