Tempered glass substrate and method of producing the same
First Claim
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1. A tempered glass substrate having a compression stress layer on a surface thereof, wherein the tempered glass substrate has a glass composition comprising, in terms of mass%, 40 to 70% of SiO2, 12 to 21% of Al2O3 , 0 to 3.5% of Li2O, 7 to 20% of Na2O, 0 to 4% of TiO2, and 0 to 3.0% of K2O, and wherein the tempered glass substrate has an unpolished surface and is cut into a predetermined size of substrate after a tempering treatment.
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Abstract
A tempered glass substrate of the present invention is a tempered glass substrate, which has a compression stress layer on a surface thereof, and has a glass composition comprising, in terms of mass %, 40 to 71% of SiO2, 3 to 21% of Al2O3, 0 to 3.5% of Li2O, 7 to 20% of Na2O, and 0 to 15% of K2O.
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16 Claims
- 1. A tempered glass substrate having a compression stress layer on a surface thereof, wherein the tempered glass substrate has a glass composition comprising, in terms of mass%, 40 to 70% of SiO2, 12 to 21% of Al2O3 , 0 to 3.5% of Li2O, 7 to 20% of Na2O, 0 to 4% of TiO2, and 0 to 3.0% of K2O, and wherein the tempered glass substrate has an unpolished surface and is cut into a predetermined size of substrate after a tempering treatment.
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16. A method of producing a tempered glass substrate, comprising the steps of:
- melting a glass raw material which is blended to have a glass composition comprising, in terms of mass %, 40 to 70% of SiO2, 12 to 21% of Al2O3 , 0 to 3.5% of Li2O, 7 to 20% of Na2O, 0 to 4% of TiO2, and 0 to 3.0% of K2O to form a resultant;
forming the resultant into a glass plate shape;
performing an ion exchange treatment to form a compression stress layer on a surface of the glass plate shape, and then cutting the glass plate shape into a predetermined size after a tempering treatment, and wherein the tempered glass substrate has an unpolished surface.
- melting a glass raw material which is blended to have a glass composition comprising, in terms of mass %, 40 to 70% of SiO2, 12 to 21% of Al2O3 , 0 to 3.5% of Li2O, 7 to 20% of Na2O, 0 to 4% of TiO2, and 0 to 3.0% of K2O to form a resultant;
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