Glass ceramic, chemically strengthened glass, and semiconductor support substrate

A technology of strengthening glass and glass-ceramic, applied in the direction of semiconductor/solid-state device parts, circuits, electrical components, etc., can solve the problem of transparency rarely reaching the level of protective glass, and achieve excellent transparency and strength, chemical strengthening The effect of excellent characteristics and large coefficient of thermal expansion

Active Publication Date: 2021-12-14
ASAHI GLASS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even clear glass-ceramics are rarely transparent enough to be suitable for protective glass

Method used

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  • Glass ceramic, chemically strengthened glass, and semiconductor support substrate
  • Glass ceramic, chemically strengthened glass, and semiconductor support substrate
  • Glass ceramic, chemically strengthened glass, and semiconductor support substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0164] Hereinafter, the present invention will be described by way of examples, but the present invention is not limited thereto.

[0165]

[0166] Glass raw materials were prepared so that the glass compositions in Tables 1-2 by mass % based on oxides were obtained, and it weighed so that 800g of glass could be obtained. Next, the mixed glass raw materials were put into a platinum crucible, put into an electric furnace at 1600° C., and melted for about 5 hours to defoam and homogenize.

[0167] The resulting molten glass was poured into a mold, kept at the glass transition temperature for 1 hour, and then cooled to room temperature at a rate of 0.5° C. / minute to obtain a glass block. The glass transition temperature, thermal expansion coefficient, specific gravity, Young's modulus, refractive index, and Vickers hardness of the amorphous glass were evaluated using a part of the obtained block, and the evaluation results are shown in Tables 1 and 2. Blank columns in the tabl...

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Abstract

The invention relates to a glass ceramic, a chemically strengthened glass, and a semiconductor support substrate. The purpose of the present invention is to provide: a glass ceramic which has excellent transparency and chemical strengthening properties; and a chemically strengthened glass which has a large coefficient of thermal expansion, excellent transparency and strength, and in which fragments do not easily scatter when broken. The present invention relates to: a glass ceramic having a specific composition and having a visible light transmittance at a thickness of 0.7 mm and a haze value at a thickness of 0.7 mm within specific ranges; the present invention relates to a chemically strengthened glass having a compressive stress layer on the surface, and having a visible light transmittance when converted to a thickness of 0.7 mm, a haze value when converted to a thickness of 0.7 mm, a surface compressive stress, and a compressive stress layer depth within specific ranges, and the chemically strengthened glass being a glass ceramic having a specific composition.

Description

[0001] This application is a divisional application of the Chinese patent application with the application number 201980091249.9, the application date is August 27, 2019, and the invention title is "glass-ceramic, chemically strengthened glass and semiconductor support substrate". technical field [0002] The present invention relates to glass-ceramic, chemically strengthened glass and semiconductor supporting substrate. Background technique [0003] Chemically strengthened glass is used for cover glass of portable terminals, etc. [0004] Chemically strengthened glass is, for example, glass in which ion exchange occurs between alkali metal ions in the glass and alkali metal ions in the molten salt by bringing the glass into contact with a molten salt containing alkali metal ions, thereby forming a compressive force on the surface of the glass. Stress layer of glass. [0005] Glass-ceramic is glass in which crystals have been precipitated. Compared with amorphous glass with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C10/02C03C21/00
CPCC03C10/0027C03C21/002C03C3/083H01L23/15C03C4/0092C03C4/02C03C27/00C03C4/18C03C2204/00
Inventor 李清荒井雄介小池章夫小野和孝古田仁美泽村茂辉
Owner ASAHI GLASS CO LTD
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