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Glass substrate end surface evaluation method, glass substrate end surface processing method, and glass substrate

A glass substrate and evaluation method technology, which is applied to metal processing equipment, manufacturing tools, grinding machine parts, etc., can solve problems such as gaps, cracks, and burns on the end face of the glass substrate, achieving good quality and preventing burns.

Active Publication Date: 2013-03-20
ASAHI GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] On the other hand, glass substrates may have defects such as burns, cracks, and chips on the end surface due to the chamfered shape of the end surface, so the chamfered shape is still being studied

Method used

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  • Glass substrate end surface evaluation method, glass substrate end surface processing method, and glass substrate
  • Glass substrate end surface evaluation method, glass substrate end surface processing method, and glass substrate
  • Glass substrate end surface evaluation method, glass substrate end surface processing method, and glass substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0092] Using a metal bond grinding wheel with a grain size of 450-600, the peripheral speed of 470-3000m / min is controlled so that the grinding load is constant, and the end surface Z of the glass substrate G of 1000mm×1000mm is roughly ground. Next, use an elastic resin bonded grinding wheel with a particle size of No. 600 as a finishing grinding wheel, and control the peripheral speed so that the grinding load is constant in the range of 470 to 3000 m / min, and finish grinding the end surface Z into a mirror surface.

[0093] figure 2 The photographic image shown is the glass substrate G processed by the chamfering wheel 10 , and is a photographic image obtained by photographing the region of the processing center of the end face Z of the glass substrate G with a laser microscope 14 .

[0094] image 3 is true figure 2 The image data of the image data is subjected to black-and-white binarization processing, and the concave portion existing in the end face Z is regarded as...

Embodiment 2

[0097] Using a metal bond grinding wheel with a grain size of 450-600, the peripheral speed of 470-3000m / min is controlled so that the grinding load is constant, and the end surface Z of the glass substrate G of 1000mm×1000mm is roughly ground. Next, use an elastic resin bond grinding wheel with a particle size of No. 220 as a fine grinding wheel, and control the peripheral speed so that the grinding load is constant in the range of 470 to 3000 m / min, and finish grinding the end surface Z into a mirror surface.

[0098] Figure 4 The photographic image shown is the glass substrate G processed by the chamfering wheel 10 , and is a photographic image obtained by photographing the region of the processing center of the end face Z of the glass substrate G with a laser microscope 14 .

[0099] Figure 5 is true Figure 4 The black-and-white binarization process is carried out on the image data of the end face Z, and the photo image represented by color separation is made by using...

Embodiment 3

[0102] Using a metal bond grinding wheel with a grain size of 450-600, the peripheral speed of 470-3000m / min is controlled so that the grinding load is constant, and the end surface Z of the glass substrate G of 1000mm×1000mm is roughly ground. Next, use an elastic resin bonded grinding wheel with a particle size of No. 320 as a fine grinding wheel, control the peripheral speed so that the grinding load is constant within the range of 470-3000m / min, and finish grinding the end surface Z into a mirror surface .

[0103] Image 6 The photographic image shown is the glass substrate G processed by the chamfering wheel 10 , and is a photographic image obtained by photographing the region of the processing center of the end face Z of the glass substrate G with a laser microscope 14 .

[0104] Figure 7 is true Image 6 The image data of the image data is subjected to black-and-white binarization processing, and the concave portion existing on the end face Z is regarded as a white...

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Abstract

Disclosed are: a glass substrate end surface evaluation method that enables the characteristics of an end surface of a glass substrate to be accurately evaluated; a glass substrate end surface processing method based on the evaluation method; and a glass substrate for which the adhesion of dust on the glass substrate end surface can be reduced on the basis of the processing method, and for which the occurrence of defects such as burning, chipping, and cracking can be prevented on a chamfered surface on the basis of the processing method. According to the glass substrate end surface evaluation method, the glass substrate end surface processing method, and the glass substrate, an image of an end surface (Z) taken with a laser microscope (14) undergoes black and white binarization processing whereby recesses that exist on the end surface are identified as white images, and mirrored surfaces on the end surface are identified as black images, and the characteristics of the end surface of the glass substrate are evaluated on the basis of the ratio of the area of the white images to the area of the black images. The characteristics of an end surface (Z) of a glass substrate (G) can be more accurately evaluated by this evaluation method than the evaluation methods of the prior art, which involve stylus profilometers, whereby the reliability of the accuracy depends on the size of the recesses that exist on an end surface (Z).

Description

technical field [0001] This invention relates to the evaluation method of the end surface of the glass substrate used as FPD (Flat Panel Display: Flat Panel Display), the processing method of the glass substrate end surface, and a glass substrate. Background technique [0002] In the glass substrate for FPD used in a liquid crystal display, a plasma display, etc., the end surface is chamfered by the grinding|polishing part in a manufacturing process. The shape of the end surface of the glass substrate to be chamfered is roughly divided into the following types according to the shape of the chamfering wheel Figure 24A The end face shape of the single curved surface R1 shown and has such Figure 24B The flat part E and the end face shape of two curved surfaces R2 and R2 with equal curvature are shown. In addition, in the same figure, the enlarged cross-section of the chamfered end surface is shown, and the code|symbol G is a glass substrate. [0003] However, it is known th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C19/00G02F1/1333
CPCB24B49/12G01N2021/9513G02F1/1333G01N21/9503B24B9/10B24B49/10C03C19/00G06T7/40G01N21/95Y10T428/24777G01N21/896G01N2021/9511
Inventor 宫本干大鸟井秀晴木村友纪
Owner ASAHI GLASS CO LTD
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