METHOD FOR MANUFACTURING TEMPERED GLASS SUBSTRATE, AND TEMPERED GLASS SUBSTRATE

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing at a low cost a tempered glass substrate having curved surface parts with few surface defects.SOLUTION: A method for manufacturing a tempered glass substrate 10 having curved surface parts 10A each including a recessed surface 11 and a projecting surface 12 opposite to the recessed surface 11 includes: a cover material forming step which forms cover materials 20 on a part of the surface of a plate-like non-tempered glass substrate to obtain a cover material forming surface; and a deformation step by ion exchange which performs ion exchange treatment of the non-tempered glass substrate having the cover material forming surface to deform the cover material forming surface to obtain the tempered glass substrate 10 having the curved surface parts 10A.