High strain-point glass composition for substrate

The invention relates to a glass substrate composition, comprising SiO255~70wt%, Al2O30~1wt% and ZrO20.1~5wt%, And 0.1~5wt%, K2O 7~13wt% and MgO7~14wt%, CaO 0~4wt%, SrO 7~12wt% and SO30.01~0.5wt%. Adjusting the glass substrate of the composition preparation and a result of strain point is at least 570℃, a display in the sintering process is high - temperature at the thermal low deformation, a lower than 1460℃ melting point, such as fuel it has not added with the fireproof material is one of a shortcoming, and a polyimide 80~95×10-7/℃ coefficient of 50~350℃ temperature range. Therefore, suitable for serving as substrate according to one of the invention.