| abstract |
A method of making a glass sheet ( 10 ) comprises laminating a high CTE core glass ( 11 ) to a low CTE clad glass ( 12 ) at high temperatures and allowing the laminate ( 10 ) to cool creating compressive stress in the clad glass ( 12 ), and then ion exchanging the laminate ( 10 ) to increase the compressive stress in the outer near surface regions of the clad glass ( 12 ). The core glass ( 11 ) may include ions that exchange with ion in the clad glass ( 12 ) to increase the compressive stress in inner surface regions of the clad glass ( 12 ) adjacent to the clad glass/core glass interfaces. The glass laminate ( 10 ) may be formed and laminated using a fusion forming and laminating process and fusion formable and ion exchangeable glass compositions. |