Method for improving percent of pass of liquid crystal box

A liquid crystal screen and pass rate technology, which is applied in the field of liquid crystal screen manufacturing, can solve the problems of zero pass rate and lower pass rate, and achieve the effect of reducing cost and improving yield

Inactive Publication Date: 2008-12-03
上海广电液晶显示器有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] In normal mass production, not every batch has pitting, but once it occurs, the pass rate will be reduced by more than

Method used

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  • Method for improving percent of pass of liquid crystal box
  • Method for improving percent of pass of liquid crystal box
  • Method for improving percent of pass of liquid crystal box

Examples

Experimental program
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Effect test

Embodiment

[0030] A method to improve the qualified rate of LCD screen is:

[0031] The first step is to selectively etch the ITO film on the ITO glass 1 by using a substrate cleaning agent, a photoresist printing machine, and an exposure machine. According to the needs of the product, the useful ones are retained and the useless ones are etched away;

[0032] The second step: use a printing machine to coat a layer of inorganic thin film TOP layer 2 on the surface of the etched ITO glass 1;

[0033] The third step: use a printing machine and a friction machine to coat a layer of film PI layer 3 that can produce grooves through friction on the surface of the TOP layer 2. If the machine is shut down, print 4-6 sheets of plain glass 4 before printing, such as Figure 5 shown;

[0034] Step 4: Use the laminating machine to paste two large pieces of glass into a large pair of glass;

[0035] Step 5: Use a cutting machine and a splitter to cut and split a large pair of glass into a strip scr...

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Abstract

The invention relates to a method for increasing the qualification rate of LCD screens. The method is characterized in that the third step and the tenth step of the former technology are improved. In the third step of the technology, a printer and a rubbing machine are utilized to apply a film layer called a PI layer, which can generate a groove after being rubbed, on a TOP layer. In case of abnormal equipment shutdown during the application of the PI layer, 4 to 6 additional pieces of mother glass are printed to carry away superfluous physic liquid, so that the accumulation of the physic liquid can be avoided and the phenomenon of uneven film surface of the PI layer printed on the TOP layer can be prevented. In the tenth step, the method adopts a gradual cooling method to ensure liquid crystal molecules in the PI layer are arranged in time, so as to prevent pocking marks from appearing. The method has the advantages that major problems occurring during the production process can be solved by the most cost-effective and simple method, and the qualification rate of LCD screens can be greatly improved.

Description

technical field [0001] The invention relates to a method for improving the qualification rate of liquid crystal screens, which is used in the manufacture of mobile phone liquid crystal screens and belongs to the technical field of liquid crystal screen manufacture. Background technique [0002] In the manufacturing process of mobile phone LCD screens, it generally goes through various processes such as photolithography, printing, precision cutting, splitting, flattening and sealing, cleaning, and rearranging. In the actual operation of each process, it is very easy to cause defective products due to improper setting of parameters in each process. After the LCD screen is manufactured, it needs to be tested by electrical testing. During inspection, a normal screen should display a blue square dot matrix, but often you will find white spots on the entire screen, which are smaller than the dot matrix and have low brightness. When it happens, the reject rate is very high, someti...

Claims

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Application Information

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IPC IPC(8): G02F1/1333G03F7/00G02F1/1337G02F1/13
Inventor 段晨辉
Owner 上海广电液晶显示器有限公司
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