COVER GLASS AND METHOD OF PRODUCING SAME

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.

主权项

1. A cover glass comprising a glass formation member having a compressive stress layer formed at each of a front surface side and a rear surface side thereof by performing chemical strengthening through ion exchange,
said glass formation member including:
a central region; anda curved-surface region provided consecutively to an outer edge of said central region and formed to be curved in a direction getting away from the front surface as said curved-surface region extends outwardly from said central region, said 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 said curved-surface region being formed to have a compressive stress layer depth with which a surface stress value thereof becomes higher than a surface stress value of said compressive stress layer formed in said central region and becomes a substantial peak.