GLASS SUBSTRATE OF COVER GLASS FOR MOBILE ELECTRONICS DEVICE IMAGE DISPLAY APPARATUS FOR MOBILE ELECTRONICS DEVICE MOBILE ELECTRONICS DEVICE MANUFACTURING METHOD OF GLASS SUBSTRATE OF COVER GLASS FOR MOBILE ELECTRONICS DEVICE

摘要

The compressive stress layers 30U and 30B formed by the ion exchange method are provided only on the surface 20U side and the back surface 20B side and the end surface 40A is a curved surface having a convex shape, (40A0) having a surface roughness (Ra) of 10 nm or less is 10 nm or less, a glass substrate of a cover glass for a portable electronic device, an image display device for a portable electronic device, a portable electronic device, and a cover glass for a portable electronic device.