Method for manufacturing strengthened glass substrate
A manufacturing method and technology of strengthening glass, which is applied in the field of manufacturing strengthened glass substrates, can solve problems such as performance deviation of strengthened glass, difference in stress relaxation degree of compressive stress layer, etc., and achieve the effect of suppressing stress relaxation
Inactive Publication Date: 2015-01-14
ASAHI GLASS CO LTD
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Problems solved by technology
Therefore, in the cooling process, depending on the position in the carrier on which the glass substrate is mounted, the degree of stress relaxation of the compressive stress layer may vary, and the performance of the obtained strengthened glass may vary.
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[0020] Hereinafter, modes for implementing the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments, and various modifications and substitutions can be made to the following embodiments without departing from the scope of the present invention.
[0021] The manufacturing method of the tempered glass substrate of the present invention has the following steps: a chemical strengthening step of contacting the glass substrate with the chemical strengthening salt solution in the first tank; A cooling process for strengthening the contact of the molten salt; and a liquid removal process for removing the chemically strengthened molten salt adhering to the surface of the glass substrate. In addition, the chemical strengthening salt solution in the first tank and the second tank use chemical strengthening salt with substantially the same composition, and the temperature T2 of the chemical strengthening s...
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Provided is a method for manufacturing a strengthened glass substrate, said method comprising a chemical strengthening step for contacting a glass substrate with a molten chemical strengthening salt liquid in a first tank, a cooling step for contacting the glass substrate having been treated in the chemical strengthening step with a molten chemical strengthening salt liquid in a second tank, and a draining step for draining off the molten chemical strengthening salt liquids sticking to the surface of the glass substrate, characterized in that: the molten chemical strengthening salt liquids in the first tank and in the second tank comprise chemical strengthening salts having substantially the same chemical composition; the temperature (T2) of the molten chemical strengthening salt liquid in the second tank is lower than the temperature of the molten chemical strengthening salt liquid in the first tank and satisfies the requirement Tmp<T2<=Tmp+50, wherein Tmp represents the melting point of the chemical strengthening salt; and, in the draining step, the ambient temperature (T3) around the glass substrate satisfies the requirement Tmp<T3<=Tmp+50.
Description
technical field [0001] The present invention relates to a method of manufacturing a strengthened glass substrate. Background technique [0002] Glass substrates are used in displays, cover glasses for solar cells, and the like. In recent years, weight reduction, thickness reduction, and maintenance and improvement of strength of glass substrates have been required depending on applications. [0003] As one method of increasing the strength of a glass substrate, a method of chemical strengthening is known. Chemical strengthening refers to a strengthening method of changing the composition of the surface of the glass substrate and forming a compressive stress layer on the surface by bringing the glass substrate into contact with a chemical strengthening salt solution. [0004] In one example of the step of performing chemical strengthening, the glass substrate is chemically strengthened by immersing the glass substrate in a chemical strengthening salt solution, and then main...
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Login to View More IPC IPC(8): C03C21/00C03C3/083C03C3/085C03C3/087
CPCC03C3/085C03C3/083C03C3/087C03C21/00C03C21/002C03C21/001
Inventor 堀顺士
Owner ASAHI GLASS CO LTD