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Reinforced glass substrate

A tempered glass and substrate technology, applied in glass molding, glass molding, glass manufacturing equipment, etc., can solve the problem of significantly improving the mechanical strength of glass substrates, achieving glass ion exchange performance and devitrification resistance at the same time, and difficult Maintaining the mechanical strength of the glass substrate, etc.

Active Publication Date: 2009-09-02
NIPPON ELECTRIC GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the glass substrate is polished, microscopic defects tend to occur on the surface of the glass substrate, making it difficult to maintain the mechanical strength of the glass substrate
[0008] Due to such circumstances, it is difficult to achieve both ion exchange performance and devitrification resistance of the glass, and it is difficult to significantly improve the mechanical strength of the glass substrate.

Method used

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  • Reinforced glass substrate
  • Reinforced glass substrate
  • Reinforced glass substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Hereinafter, the present invention will be described based on examples.

[0088] Tables 1 to 7 show examples (sample Nos. 1 to 46) of the present invention and comparative examples (sample Nos. 47 and 48) of the present invention.

[0089] 【Table 1】

[0090]

[0091] 【Table 2】

[0092]

[0093] 【table 3】

[0094]

[0095] 【Table 4】

[0096]

[0097] 【table 5】

[0098]

[0099] 【Table 6】

[0100]

[0101] 【Table 7】

[0102]

[0103] Each sample was produced as follows. First, glass raw materials were blended so as to have the glass compositions shown in Tables 1 to 7, and were melted at 1600° C. for 8 hours using a platinum boat. Then, the molten glass was flowed onto a carbon plate, and formed into a plate shape. Various characteristics were evaluated about the obtained glass substrate.

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Abstract

The objective of the invention is to obtain a glass substrate satisfying ion exchange performance and devitrification resistance of a glass simultaneously and having higher mechanical strength compared to a conventional glass substrate. The tempered glass substrate which has a compression stress layer on a surface thereof, comprises a glass composition including, in terms of mole%, 50-85% of SiO2 , 5- 30% of Al2O3, 0-20% of Li2O, 0-20% of Na2O, 0-20% of K2O, 0.001-10% of TiO2, and 15-35% of Li2O+Na2O+K2O+Al2O3. The tempered glass substrate has a (Li2O+Na2O+K2O) / Al2O3 value of 0.7-3 in terms of mole fraction, and is substantially free of As2O3 and F.3 in terms of mole fraction, and is substantially free of As2O3 and F.

Description

technical field [0001] The present invention relates to a tempered glass substrate, and particularly relates to a tempered glass substrate suitable for a mobile phone, a digital camera, a PDA (portable terminal), or a touch panel display. Background technique [0002] Devices such as mobile phones, digital cameras, PDAs, and touch panel displays tend to be popularized. [0003] High mechanical strength is required for glass substrates used in these applications. Conventionally, glass substrates strengthened by ion exchange or the like (so-called tempered glass substrates) have been used for these applications (see Patent Document 1 and Non-Patent Document 1). [0004] [Patent Document 1] Japanese Patent Laid-Open No. 2006-83045 [0005] [Non-Patent Document 1] Toruro Izumiya et al., "New glass and its physical properties", 1st edition, Management Systems Research Institute Co., Ltd., August 20, 1984, p.451-498 [0006] It is described in Non-Patent Document 1 that if the ...

Claims

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Application Information

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IPC IPC(8): C03C3/091C03C21/00C03B17/06C03C3/093G02F1/1333
CPCG02F1/13338C03C21/002C03C3/085G02F2001/133302C03C3/083C03C3/093C03C3/097C03C3/091G02F1/133302C03B17/00C03C21/00Y10T428/31Y10T428/315
Inventor 村田隆
Owner NIPPON ELECTRIC GLASS CO LTD
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