Patent ID: 8670182
Filing Date: 2014-03-11
Classification: C03C,G02B,H01L

Abstract:
1. An alkali-free cover glass composition, which: does not substantially contain a lead oxide and an alkali metal oxide; has a refractive index (n d ) of 1.7 to 2.3; has a glass transition temperature of 530° C. or less; has a dissolution depth of less than 1.3 μm as measured and calculated by an acid dipping weight loss measurement method; and comprising, in terms of mol % on the basis of oxides thereof: 4 to 32% of ZnO; 5 to 35% of Bi 10 to 30% of P 8 to 25% of Nb 0 to 5% of BaO, wherein when a content of the Bi a value obtained by dividing a sum of a content of the Bi