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Glass substrate production method

A technology for glass substrates and manufacturing methods, applied in glass manufacturing equipment, manufacturing tools, glass furnace equipment, etc., can solve problems such as uneven display, liquid crystal cell gap error, etc., and achieve the effect of suppressing unevenness

Active Publication Date: 2013-05-29
AVANSTRATE INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when this glass substrate is incorporated into a liquid crystal panel as a glass substrate for a liquid crystal panel, it may cause an error in the liquid crystal cell gap or cause display unevenness.

Method used

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  • Glass substrate production method
  • Glass substrate production method

Examples

Experimental program
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Embodiment Construction

[0029] Hereinafter, the manufacturing method of the glass substrate of this embodiment is demonstrated. figure 1 It is a figure which shows an example of the process of the manufacturing method of the glass substrate of this invention.

[0030] (Overall Outline of Manufacturing Method of Glass Substrate)

[0031] The manufacturing method of a glass substrate mainly includes a melting process (ST1), a clarification process (ST2), a homogenization process (ST3), a supply process (ST4), a molding process (ST5), a slow cooling process (ST6), and a cutting process ( ST7). In addition, there are also a grinding process, a grinding process, a cleaning process, an inspection process, a packaging process, etc., and a worker who transports two or more glass substrates stacked in the packaging process to the ordering party.

[0032] The melting process (ST1) is performed in a melting tank. In the melting step, the molten glass in which the temperature of the surface layer including t...

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Abstract

In a melting step in a glass substrate production method: a molten glass having a uniform temperature for the surface layer thereof, including a liquid surface, is made by depositing a glass raw material on to substantially the entire liquid surface of a molten glass stored in a melting tank; and the molten glass is caused to flow towards a subsequent step, from a discharge port disposed in a floor section of an internal side wall facing a first direction, among internal side walls in the melting tank. When the molten glass is caused to flow, the temperature of the bottom layer of the molten glass, positioned lower than the surface layer in the thickness direction of the molten glass, and the amount of heat applied to the molten glass positioned at both end sections in the first direction in the melting tank are adjusted, such that convection caused by the temperature distribution of the molten glass in the bottom layer does not occur. As a result, the temperature distribution along the first direction of the molten glass in the bottom layer is made uniform.

Description

technical field [0001] The present invention relates to a method for manufacturing a glass substrate for manufacturing a glass substrate. Background technique [0002] The mainstream glass substrates used in flat panel displays (hereinafter referred to as FPDs) such as liquid crystal displays and plasma displays are, for example, glass substrates with a thickness of 0.5 mm to 0.7 mm and a size of 300 mm×400 mm to 2850 mm×3050 mm. [0003] As a manufacturing method of the glass substrate for FPDs, the overflow down-draw method is known. In the overflow down-draw method, a glass sheet is molded from the molten glass by causing molten glass to overflow from the upper portion of a molded body of molten glass in a molding furnace, and the formed glass sheet is gradually cooled and cut. Afterwards, the cut sheet glass is further cut into specific dimensions according to the customer's specifications, cleaned, end-face polished, etc., and shipped as glass substrates for FPDs. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B5/02C03B3/00C03B5/43
CPCC03B5/03C03B5/031C03B5/235C03B18/02C03B18/18
Inventor 君岛哲郎村上次伸日冲宣之藤本慎吾
Owner AVANSTRATE INC
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