Patent ID: 8853113
Filing Date: 2014-10-07
Classification: C03C,G02F,H01L,Y02E,Y02P

Abstract:
1. A method for manufacturing a flat panel display glass substrate, the method comprising: a melting step of melting a glass material for a glass comprising, as expressed in mol %, 55-80% SiO a forming step of forming the molten glass into a glass plate, and an annealing step of annealing the glass plate, wherein in the melting step, the molten glass is produced to have a β-OH of 0.05-0.40 mm in the annealing step, the glass plate is cooled at an average rate of 50-300° C./min within the temperature range of the glass transition temperature (Tg) to Tg -100° C., the heat shrinkage rate of the glass plate is 75 ppm or less, and the heat shrinkage rate is calculated from the amount of shrinkage of the glass plate measured after a heat treatment which is performed at a temperature rising and falling rate of 10° C./min and at 550° C. for 2 hours by: the heat shrinkage rate (ppm) ={the amount of shrinkage of the glass plate after the thermal treatment/the length of the glass plate before the heat treatment} ×10