GLASS SUBSTRATE FOR FLAT PANEL DISPLAY AND PRODUCTION OF DISPLAY SUBSTRATE

摘要

PROBLEM TO BE SOLVED: To obtain a glass substrate scarcely deforming even after produced by dividing and cutting a large plate glass and not causing a trouble that a pattern is shifted from a prescribed design to generate the displaying failure of a display, by controlling the residual stress of the glass substrate to a specific value or smaller in the flat surface direction. SOLUTION: This glass substrate for a flat panel display has a residual stress of <=5 kg/cm2 in the flat surface direction. The method for producing a display substrate comprises forming plural patterns on the glass substrate having the residual stress of <=5 kg/cm2 in the flat surface direction and subsequently dividing and cutting the glass substrate for each pattern. The longitudinal and latitudinal sizes of the glass substrate are >=400 mm and >=500 mm, respectively. A large heat-resistant setter having a longitudinal size and a latitudinal size both larger at least >=50 mm than those of the glass substrate is used to uniformly anneal the glass substrate. As another method, a heat-resistant dummy setter is disposed at a place near to a heat-resistant setter in which a glass substrate is placed, and the glass substrate is thereby uniformly annealed.