Glass backing material of cover glass for portable equipment and cover glass for portable equipment

摘要

P To provide a glass substrate of a cover glass for portable equipment and which has no excessively projecting part at an end face and has high mechanical strength. PSOLUTION: The glass substrate of a cover glass for portable equipment is manufactured by cutting a sheet-form glass substrate into a desired shape by etching the same and has a pair of main surfaces and the end face. A top part projecting outward in the planar direction of the main surfaces from the end face has a shape in which two layers are not cut OFF from the surface in a sharp edge test carried out according to UL (Underwriters Laboratories) - 1439. ON the pair of main surfaces and the end face and compressive stress layers are formed by an ion-exchange chemical strengthening treatment. PCOPYRIGHT: (C)2012 and JPO& INPIT