Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for reducing warpage of glass substrate by chemical strengthening treatment, and chemically strengthened glass and method for producing same

A glass substrate and strengthening treatment technology, applied in the direction of coating, can solve problems such as damage to flatness, cracking of protective glass, decrease in strength, etc., and achieve the effects of reducing warpage, simplifying polishing treatment, and reducing poor ion exchange capacity

Inactive Publication Date: 2016-04-06
ASAHI GLASS CO LTD
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the thickness of the cover glass is thinned, there is a problem that the strength is lowered, and the cover glass itself is broken due to falling during use or carrying.
[0007] For float glass, it has been reported that after this chemical strengthening treatment warpage occurs and flatness is impaired (Patent Document 1)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for reducing warpage of glass substrate by chemical strengthening treatment, and chemically strengthened glass and method for producing same
  • Method for reducing warpage of glass substrate by chemical strengthening treatment, and chemically strengthened glass and method for producing same
  • Method for reducing warpage of glass substrate by chemical strengthening treatment, and chemically strengthened glass and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0144] Hereinafter, examples of the present invention will be specifically described, but the present invention is not limited to these examples.

[0145] (1) Manufacture of float glass

[0146] A glass material having the following composition was produced by the float process so that the plate thickness was 0.7 mm, and was cut into 100×100 mm to produce a float plate glass.

[0147] (Glass material A) by mass %, 71.5% of SiO 2 , 1.8% Al 2 o 3 , 13.5% Na 2 O, 0.26% K 2 O, 4.64% MgO, 7.83% CaO, 0.03% ZrO 2

[0148] (2) Preparation of glass substrate

[0149] Using the injector 10 used in the atmospheric pressure CVD method, as figure 2 In the manner shown in the schematic diagram, the surface of the float flat glass produced in (1) is supplied with monosilane (SiH 4 ), oxygen (O 2 ) gas, so that monosilane and oxygen react on the surface of the glass substrate, thereby forming SiO 2 film on the glass substrate.

[0150] That is, 100% SiH mixed with 0.045SLM 4 Nit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
densityaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method which comprises forming a film having at least one layer on at least a top surface of a glass substrate that is produced by a float method and has a bottom surface and the top surface to thereby reduce the warpage of the glass substrate which can be caused by a subsequent chemical strengthening treatment, wherein the bottom surface is in contact with a molten metal during molding and the top surface is opposed to the bottom surface. In the method, the glass substrate can have a compressive stress layer depth of 20 mum or less when the glass substrate is subjected to a chemical strengthening treatment with potassium nitrate melt at 420 DEG C for 150 minutes, and the film contains at least one of oxides and composite oxides each comprising silicon and has a film thickness of 17 nm or more.

Description

technical field [0001] The present invention relates to a method for reducing warpage of a glass substrate caused by chemical strengthening treatment, a chemically strengthened glass with reduced warpage, and a method for manufacturing the chemically strengthened glass with reduced warpage. Background technique [0002] In recent years, among portable information devices such as tablet personal computers, smartphones, and e-book readers, devices equipped with touch panel displays have become mainstream. The touch panel display has a structure in which a touch sensor glass and a cover glass are laminated on a glass substrate for a display, or a structure in which a touch sensor glass and a cover glass are integrated. [0003] Since such portable information devices are required to be lightweight and thin, the cover glass used to protect the display is also required to be thinner. [0004] However, when the thickness of the cover glass is thinned, there is a problem that the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C03C21/00C03C3/087
CPCC03C3/087C03C17/002C03C17/245C03C21/002C03C2217/213
Inventor 铃木祐一三浦丈宜涩谷崇西田航世良洋一
Owner ASAHI GLASS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com