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US 2013/0199241 A1Published application
Reinforced plate glass and method for manufacturing the same
AssigneeNippon Electric Glass Co., Ltd.
InventorMasahiro SAWADA
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a reinforced plate glass by which glass surface strength is sufficiently increased, and a stable quality reinforced plate glass is manufactured at high production efficiency. The reinforced plate glass is formed of an inorganic oxide glass, and is provided with a compression stress layer by chemical reinforcement on plate surfaces opposed to each other in a plate thickness direction. Plate end faces have regions where a compression stress is formed and regions where no compression stress is formed.
Claims10
1-9. (canceled)
A method of manufacturing a reinforced plate glass, comprising the steps of:
- making a palate glass made of an aluminosilicate glass comprising 50 to 80% of SiO2, 5 to 25% of Al2O3, 3 to 25% of Li2O+Na2O, and 0 to 10% of CaO+MgO+ZnO+SrO+BaO, represented by percent by mass of an oxide conversion,
- forming a compression stress layer on plate surfaces of the plate glass by chemical reinforcement, the compression stress layer having a thickness of 100 μm or less, and
- dividing the plate glass chemically reinforced by scribe cleaving to obtain the reinforced plate glass which comprises a plate end face comprising a region where a compression stress is formed and a region where a compression stress is not formed
Dependencies are inferred from the claim text.