Laminated and ion-exchanged strengthened glass laminates

A process for making a strengthened laminated glass structure, comprising the steps of:

• draw forming a core glass having a first coefficient of thermal expansion (CTE) to form a core glass sheet;
• draw forming an ion exchangeable clad glass having a second CTE that is lower than the first CTE to form a first clad glass sheet and a second clad glass sheet;
• laminating the first clad glass sheet to a first surface of the core glass sheet and the second clad glass sheet to a second surface of the core glass sheet at a temperature at or above a softening point of at least one of the core glass and the clad glass to form a laminated glass structure, wherein the clad glass sheets are wider than the core glass sheet, such that edges of the clad glass sheets extend beyond edges of the core glass sheet;
• deforming edge portions of the clad glass sheets that extend beyond the edges of the core glass sheet toward each other and fusing the edge portions of the clad glass sheets together at the softening point of the clad glass or higher to encapsulate the edges of the core glass sheet;
• cooling the laminated glass structure placing the core glass sheet in a state of tensile stress and placing the clad glass sheets in a state of compressive stress;
• and
• performing an ion exchange process on the laminated glass structure to create a layer of compressive stress in an outer surface region of the clad glass in addition to the compressive stress created on the clad glass by the laminating and cooling steps.