Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In acco
Described herein are alkali-free, boroalumino silicate glasses exhibiting desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs) and active matrix organic light emitting diode displays (AMOLEDs). In accordance with certain of its aspects, the glasses possess good dimensional stability as a function of temperature.
대표청구항▼
1. A glass comprising, in weight percent on an oxide basis in the ranges: SiO2 58-60Al2O3 17.5-20B2O3 6.21-7.25MgO 3-5CaO 3-4.5SrO 1.5-6BaO 3-5, the glass exhibiting a strain point >685° C., Youngs modulus >77 GPa, a density 30° C. 9. The glass of claim 1, having a T35k in the range of about 1200° C
1. A glass comprising, in weight percent on an oxide basis in the ranges: SiO2 58-60Al2O3 17.5-20B2O3 6.21-7.25MgO 3-5CaO 3-4.5SrO 1.5-6BaO 3-5, the glass exhibiting a strain point >685° C., Youngs modulus >77 GPa, a density 30° C. 9. The glass of claim 1, having a T35k in the range of about 1200° C. to about 1250° C. 10. The glass of claim 1, wherein the T35k is less than or equal to about 1235° C. 11. The glass of claim 1, wherein T35k−Tliq is greater than or equal to 60° C. 12. The glass of claim 1, having a CTE in the range of about 28−42×10−7/° C. 13. The glass of claim 1 wherein the liquidus viscosity is greater than or equal to 130 kpoise. 14. A liquid crystal display substrate comprising the glass of claim 1. 15. A boroaluminosilicate glass comprising, in weight percent on an oxide basis: SiO2 58-60, Al2O3 17.5-20, B2O3 6.21-7.25, MgO greater than or equal to 3 and less than 5, CaO 3-4.5, SrO greater than or equal to 1.5 and less than 5, BaO 3.5-5, where SiO2, Al2O3, B2O3, MgO, CaO, SrO and BaO represent the weight percent of the oxide components, wherein the glass has the following properties: (MgO+CaO+SrO+BaO)/Al2O3≥1.05 where Al2O3, MgO, CaO, SrO and BaO represent the mole percent of the oxide components, an anneal point greater than or equal to 735° C., T35k−Tliq is greater than or equal to 60° C., a T35k less than or equal to 1250° C., a CTE less than about 39×10−7/° C., a Young's Modulus greater than or equal to 77 GPa, and a density less than or equal to 2.55 g/cm3.
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이 특허에 인용된 특허 (7)
Ulrich Peuchert DE; Thomas Pfeiffer DE; Peter Brix DE; Hildegard Roemer DE, Alkali-free aluminoborosilicate glass, and uses thereof.
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