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US 6,114,039 AGranted
Process for treating glass substrates
AssigneeSaint-Gobain Vitrage
InventorFran.cedilla.oise Rifqi
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for treating glass substrates, in particular those used as memories for "peripherals" in the field of data processing. According to the invention, the process includes a surface ion-exchange strengthening step and a subsequent substrate surface dealkalization step.
Claims25
A method for preparing a glass substrate comprising the steps of:
- providing a silica-soda-lime glass substrate having a surface;
- treating the glass surface to a first depth with an ion-exchange treatment for a sufficient first time and first temperature to provide an ion-exchanged treated glass having a strengthened surface;
- and
- treating the surface of the ion-exchange treated glass to a second depth with a dealkalization treatment for a sufficient second time and second temperature to remove alkaline ions from the glass surface,
- wherein the second depth is less than the first depth.
2 more elements
A method for preparing a glass substrate comprising the steps of:
- providing a silica-soda-lime glass substrate having at least one surface;
- treating the glass surface with an ion-exchange treatment until the Na.sub.2 O average content ratio of a layer up to a depth of 0.05 microns to the treated surface layer is less than 40% by weight or until the K.sub.2 O average content ratio of the layer up to a depth of 0.05 microns to the treated surface layer is less than 60% by weight;
- and
- treating the glass surface to a dealkalization step for a sufficient time and temperature to remove alkaline ions from the glass surface to a second depth,
- wherein the second depth is less than the first depth.
2 more elements
Dependencies are inferred from the claim text.