Birch, Stewart, Kolasch & Birch, LLP
Rectangular glass substrate and method for preparing the same
A rectangular glass substrate has a front surface, a back surface, four side surfaces, and eight chamfered surfaces, and a thickness of at least 6 mm. A first curved surface along the edge line between the front surface and the chamfered surface disposed adjacent thereto has an average gradient of up to 25% in a range from the front surface to a position of 50 μm below the front surface when the substrate is rested horizontal with the front surface facing upward. A second curved surface along the edge line between at least one of four side surfaces and the chamfered surface disposed adjacent to the front surface has an average gradient of at least 30% in a range from the at least one side surface to a position of 50 μm below the at least one side surface when the substrate is rested horizontal with the at least one side surface facing upward.
SHIN-ETSU CHEMICAL CO., LTD.
B H B H C C B C C
B24B H01L B24B H01L C03C C03C B24B C03C C03C
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Daijitsu Masaki
Harada Takeuchi