Glass plate manufacturing method

A manufacturing method and glass plate technology, applied to the photoplate-making process of the patterned surface, instruments, and originals for photomechanical processing, etc., can solve the problems of adverse effects on the optical properties of the glass plate, and achieve excellent visibility and operability. Ease of use and reduced man-hours

Active Publication Date: 2012-12-05
ASAHI GLASS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If localized residual stress or birefringence occurs inside the glass sheet, it sometimes adversely affects the optical properties of the glass sheet

Method used

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  • Glass plate manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0121] Hereinafter, the present invention will be further described by way of examples.

[0122] Prepare glass plates with air bubbles inside. The glass plate was a 3 cm×3 cm glass substrate for a liquid crystal display (trade name AN100, manufactured by Asahi Glass Co., Ltd., strain point 670° C., softening point 950° C.), and a thickness of 0.7 mm. The bubbles present in this glass plate had an approximately elliptical shape and a maximum diameter of 400 μm. Put the glass plate into the heating furnace, after the temperature of the glass plate is 800°C, from CO 2 The laser light source irradiated the bubbles in the glass plate under the following conditions.

[0123] Light form: continuous excitation light (CW light)

[0124] The maximum diameter of light on the surface of the glass plate: 1.4mm

[0125] Average output: 5W

[0126] Irradiation time: 10 seconds

[0127] After irradiation, the maximum diameter of bubbles shrinks from the initial 400 μm to about 200 μm. ...

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Abstract

A glass plate manufacturing method for manufacturing a glass plate for display substrates, especially a glass plate for flat panel display substrates, or a glass plate for photomasks, free of bubbles which are a problem when the glass plate is used without causing any local bulge on the surface of the glass plate and any local residual stress and birefringence within the glass plate when a laser beam is projected to the glass plate. The method is characterized in that bubbles are reduced or extinguished by applying to the bubbles in a glass plate (or a glass ribbon at its glass plate manufacturing process) a laser beam with a wavelength to which the absorptance of the glass plate (or the glass ribbon) is 30% or more at a temperature at which the viscosity of the glass lies in the range from 107 to 1014.5 dPa s.

Description

technical field [0001] The present invention relates to a method of manufacturing glass sheets. Specifically, when used as a glass plate for a display substrate, especially a glass plate for a flat panel display substrate or a glass plate for a photomask, it relates to a glass plate on the surface of the glass plate or inside the glass plate, preferably on the surface of the glass plate and the glass plate A method of manufacturing glass sheets in which there are no air bubbles of a size that pose a problem for these uses. Background technique [0002] At present, glass plates for display substrates, especially glass plates for flat panel display substrates such as liquid crystal displays, plasma displays, organic EL displays, and field emission displays, glass plates for windows of buildings such as houses and buildings, or glass plates for automobiles, railways, airplanes, etc. Glass plates used for windows of transportation facilities such as ships, etc., glass plates ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C23/00C03B29/02C03B32/00G02F1/1333
CPCC03C23/007C03B29/08C03B32/00C03C23/0025G03F1/60G03F1/14C03B29/025G03F7/70791
Inventor 伊贺元一黑岩裕
Owner ASAHI GLASS CO LTD
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