Glass plate for display panels, process for producing it, and process for producing tft panel
AssigneeAsahi Glass Company, Limited
InventorsManabu NISHIZAWA, Yuya Shimada, Yuichi Kuroki, Kei Maeda
Life of this patent
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Abstract
To provide a glass plate for display panels which has a low 8203 content and a low compaction and which can be used as a glass substrate for large TFT panels. A glass plate for display panels, which comprises, as a glass matrix composition as represented by mass% based on oxide: SiO2 50.0 to 73.0, Al2O3 6.0 to 20.0, B2O3 0 to 2.0, MgO 4.2 to 9.0, CaO 0 to 6.0, SrO 0 to 2.0, BaO 0 to 2.0, MgO+CaO+SrO+BaO 6.5 to 11.3, Li2O 0 to 2.0, Na2O 2.0 to 18.0, K2O 0 to 13.0, and Li2O +Na2O+K2O 8.0 to 18.0, and has a heat shrinkage (C) of at most 20 ppm.
Claims5
A glass plate for display panels, which comprises, as a glass matrix composition as represented by mass% based on oxide:
- SiO2 50.0 to 73.0,
- Al2O3 6.0 to 20.0,
- B2O3 0 to 2.0,
- MgO 4.2 to 9.0,
- CaO 0 to 6.0,
- SrO 0 to 2.0,
- Ba0 0 to 2.0,
- MgO+CaO+SrO+BaO 6.5 to 11.3,
- Li2O 0 to 2.0,
- Na2O 2.0 to 18.0,
- K2O 0 to 13.0, and
- Li2O +Na2O+K2O 8.0 to 18.0,
- and has a heat shrinkage (C) of at most 20 ppm.
A glass plate for display panels, which comprises, as a glass matrix composition as represented by mass% based on oxide:
- SiO2 65.0 to 73.0,
- Al2O3 6.0 to 15.0,
- B2O3 0 to 1.0,
- MgO 5.0 to 9.0,
- CaO 0 to less than 2.0,
- SrO 0 to 1.0,
- BaO 0 to 1.0,
- MgO+CaO+SrO+BaO 6.5 to 10.0,
- Li2O 0 to 1.0,
- Na2O 3.0 to 17.0,
- K2O 0 to 12.0, and
- Li2O +Na2O+K2O 10.0 to 18.0,
- and has a heat shrinkage (C) of at most 20 ppm and a density of at most 2.46 g/cm3.
A glass plate for display panels, which comprises, as a glass matrix composition as represented by mass% based on oxide:
- SiO2 50.0 to 65.0,
- Al2O3 15.0 to 20.0,
- B2O3 0 to 1.0,
- MgO 4.2 to 8.0,
- CaO 2 to 6.0,
- SrO 0 to 1.0,
- BaO 0 to 1.0,
- MgO+CaO+SrO+BaO 6.5 to 11.0,
- Li2O 0 to 1.0,
- Na2O 2.0 to 12.0,
- K2O 0 to 12.0, and
- Li2O +Na2O+K2O 8.0 to 17.0,
- and has a heat shrinkage (C) of at most 20 ppm and an average coefficient of thermal expansion from 50 to 350° c of at most 83×10−7/° C.
Dependencies are inferred from the claim text.