Patent ID: 9040147
Filing Date: 2015-05-26
Classification: C03C,Y10T

Abstract:
1. A cover glass for use in a mobile device, wherein a recess that is recognized as a character or a figure when watching from a front side of the mobile device or a recess that is recognized when touching from the front side of the mobile device is formed on at least one of opposite main surfaces of the cover glass, and wherein a surface of the recess is an etched surface treated by etching, wherein a value of compressive stress value×compressive stress layer depth/(remaining thickness−compressive stress layer depth) is 150 MPa or less where the remaining thickness represents a thickness of the cover glass excluding a depth of the recess and where the compressive stress value and the compressive stress layer depth respectively represent a compressive stress value and a depth of a compressive stress layer at a flat portion of the main surface of the cover glass.