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Display glass substrate

A technology for glass substrates and displays, which is applied in the directions of instruments, optics, nonlinear optics, etc., can solve problems such as uneven friction (rabingmura), and achieve the effects of suppressing uneven friction and suppressing bad bright spots

Active Publication Date: 2022-03-01
AGC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that an alignment film is pasted while rotating a rubbing roller on the opposite surfaces of the glass substrates produced in each process, which are in contact with the liquid crystal layer, but rubbing unevenness (labingmura) occurs at this time (see Patent Document 1)

Method used

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  • Display glass substrate
  • Display glass substrate
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Experimental program
Comparison scheme
Effect test

Embodiment

[0068] In order to confirm the effect of this embodiment, XPS (X-ray Photoelectron Spectrometer; X-ray Photoelectron Spectrometer), TXRF (Total reflection X-Ray Fluorescence Spectrometer; Total Reflection X-ray Fluorescence Spectrometer) and Nanoindentation Tester (Nanoindentation Tester) were used. ; Nanoindentation hardness tester) for sample testing. The following is based on the test results for the glass substrate 2 of the present embodiment based on Figure 3 ~ Figure 5 to illustrate the appropriate range of values.

[0069] In the embodiment, after polishing using cerium oxide as a slurry in the polishing step S1, the polishing and / or cleaning step S2 using calcium carbonate as a slurry is followed by the cleaning step S3. By appropriately adjusting the concentration and particle size of the slurry, the pressing force of the disk brush, the number of disk brushes, etc., a plurality of samples with different values ​​obtained by XPS and TXRF were produced.

[0070] In ...

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Abstract

The present invention relates to a glass substrate for a display. The present invention provides a glass substrate for a display in which the occurrence of rubbing unevenness is suppressed. A liquid crystal device (1) has a structure in which two glass substrates (2) made of silicate glass face each other, and liquid crystal (30) is sealed between the facing surfaces. The glass substrate (2) is manufactured through the following steps: grinding step S1, grinding the surface of the glass substrate (2) with a polishing pad while supplying the cerium oxide slurry; cleaning 1 step S2, using a disc while supplying the slurry The brush cleans the surface of the glass substrate (2); and the cleaning 2 process S3 uses a cleaning agent to clean. Through the above steps, the amount of Ce in the first main surfaces (11) and (21) of the glass substrate (2) can be reduced to 0.1 atomic % or less, thereby suppressing frictional unevenness and bright spot defects.

Description

technical field [0001] The present invention relates to a glass substrate for a display. Background technique [0002] A liquid crystal device is fabricated by laminating two glass substrates and sealing liquid crystal between the glass substrates. For example, by arranging thin film transistors in a matrix on one glass substrate and disposing color filters on the other glass substrate, the optical characteristics of the liquid crystal layer sealed between the two glass substrates can be changed according to the image signal, thereby enabling Image display is performed. It is known that an alignment film is pasted while rotating a rubbing roller on the opposite surfaces of the glass substrates produced in each process, which are in contact with the liquid crystal layer, but rubbing unevenness (labingmura) occurs at this time (see Patent Document 1). [0003] Patent Document 1 discloses a rubbing device having: a rubbing cloth; a rubbing roller wound with a rubbing cloth; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1333
CPCG02F1/1333G02F1/133302G02F1/133784C03C3/04
Inventor 市仓荣治前柳佳孝龟田祐人铃木健雄
Owner AGC INC