Title:
角型ガラス基板及びその製造方法
Document Type and Number:
Japanese Patent JP6763359
Kind Code:
B2
Abstract:
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 not more than 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.
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Inventors:
Daimi Harada
Masaki Takeuchi
Masaki Takeuchi
Application Number:
JP2017157802A
Publication Date:
September 30, 2020
Filing Date:
August 18, 2017
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C03C19/00; B24B29/00; B24B37/04
Domestic Patent References:
| JP7186022A | ||||
| JP2012027176A | ||||
| JP2005316448A | ||||
| JP2016113356A | ||||
| JP2016043692A | ||||
| JP2012111661A |
Foreign References:
| WO2013031548A1 | ||||
| WO2012008343A1 |
Attorney, Agent or Firm:
Hideaki International Patent Office