| 摘要 |
A cover glass includes a glass formation member having a compressive stress layer formed at each of a front surface side and a rear surface side. The glass formation member includes: a central region; and a curved-surface region provided consecutively to an outer edge of the central region. The compressive stress layer in a region having the smallest approximated curvature radius R in a depressed-side region disposed at an inner side in the curve of the curved-surface region is formed to have a compressive stress layer depth with which a surface stress value thereof becomes higher than a surface stress value of the compressive stress layer formed in the central region and becomes a substantial peak. |
