Patent ID: 8129299

Claim:
A glass substrate for an active-matrix liquid crystal display device consisting of a glass composition that comprises, in mass %, 40 to 70% SiO 2 , 5 to 20% B 2 O 3 , 10 to 25% Al 2 O 3 , 0 to 10% MgO, 0 to 10% CaO, 0 to 20% SrO, and 0 to 10% BaO, and further comprises greater than 0.06% R 2 O, where R is at least one selected from the group consisting of Li, Na, and K, and Li 2 O falls in a range of 0 to 0.07%, Na 2 O falls in a range of 0 to 0.1%, and K 2 O falls in a range of 0.05 to 1.5%, all in mass %, wherein a thermal expansion coefficient of the glass composition is in a range of 29×10 −7 /° C. to 44×10 −7 /° C.