GLASS LAMINATE WITH LOW CS, HIGH DEPTH OF LAYER, CHEMICALLY STRENGTHENED INNER GLASS LAYER AND METHOD

摘要

A glass laminate article and related method for providing a chemically strengthened glass sheet with a low surface compressive stress (CS) and deep, depth of layer (DOL) is provided. The method includes chemically strengthening a first glass sheet with a molten salt including alkali ions such that the alkali ions of the molten salt replace smaller alkali ions of the first glass sheet generating compressive surface stress (CS) along a first major surface of the first glass sheet. The temperature of the molten salt composition during treatment of the first glass layer is greater than the glass transition temperature of the glass material (Tg) minus 100 degrees C. This may form a glass sheet with a compressive surface stress (CS) of less than 250 MPa having a depth of layer (DOL) of 20-100 microns, and this glass sheet may form the inner layer of a glass laminate article.