Method for cleaning liquid-crystal display screen electrochemically

A liquid crystal display, electrochemical technology, applied in chemical instruments and methods, cleaning methods using liquids, cleaning methods and utensils, etc. The problem of poor durability of the basic cleaning agent can improve the properties of uniform corrosion, improve the cleaning effect, and meet the requirements of environmental protection.

Inactive Publication Date: 2007-01-17
TIANJIN JINGLING MICROELECTRONIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two difficult problems in the liquid crystal display cleaning process: one is that the liquid crystal and pollutants remaining in the cracks are difficult to completely remove; the other is that the cleaning agent currently selected must meet environmental protection requirements
This water-based cleaning method has some shortcomings: First, the water-based cleaning agent is highly dependent on ultrasonic action, and often cannot completely remove the liquid crystal remaining in the slit of the LCD screen, and the water-based cleaning agent has poor durability , as the cleaning time increases, the cleaning effect continues to decline
[0006] One is that simple cleaning agents often need to add oxidants, such as hydrogen peroxide, to the solution. The oxidants have a certain solubility in the solution. When the liquid crystal content is high, the oxidation strength is insufficient, which will cause incomplete cleaning. residual liquid crystal
[0007] The second is that the oxidizing agent has a certain lifespan in the solution. As the cleaning progresses, the oxidizing ability of the solution will decrease, resulting in poor staying power of the cleaning agent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Get amine base by volume percentage and be triethanolamine 30%, non-ionic surfactant is the condensate (JFC) 1% of ethylene oxide and higher fatty alcohol, 69% of 18 trillion deionized water, mix and make cleaning agent for subsequent use .

[0040] Cleaning of diamond film with cleaning agent: In a tank, use diamond film as anode and graphite as cathode, add the above cleaning agent between the two electrodes and add 8 times 18 trillion deionized water as electrolyte, put the LCD screen into the flower basket, soak In it, the voltage of the two poles is controlled at 10V, the current is at 30A, and the room temperature is cleaned for about 5 minutes.

[0041] Cleaning agent cleaning: Add 8 times 18 trillion deionized water to the above cleaning agent and put it into the second tank, and heat it to 50°C, take out the LCD flower basket from the first tank, put it into the second tank, and clean it with ultrasonic waves About 5 minutes.

[0042] Diamond film cleaning: I...

Embodiment 2

[0049] Take 40% of tetrahydroxyethylenediamine as amine base by volume percentage, 5% of nonylphenol polyoxyethylene ether as nonionic surfactant, and 55% of 15 trillion deionized water, and mix them uniformly to make cleaning agent for later use.

[0050] Cleaning of diamond film with cleaning agent: In a tank, use diamond film as anode and graphite as cathode, add the above cleaning agent between the two electrodes and add 15 times 15 trillion deionized water as electrolyte, put the LCD display into the flower basket, soak Among them, the voltage of the two poles is controlled at 15V, the current is at 60A, and the room temperature is cleaned for about 10 minutes.

[0051] Cleaning agent cleaning: Add 15 times 15 trillion deionized water to the above cleaning agent and put it into the second tank, and heat it to 50°C, take the LCD flower basket out of the first tank, put it into the second tank, and clean it with ultrasonic waves About 10 minutes.

[0052] Diamond film clea...

Embodiment 3

[0059] Take the amine base by volume percentage as 35% of diethanolamine, 3% of non-ionic surfactant octylphenol polyoxyethylene ether, and 60% of 10 trillion deionized water, and mix them uniformly to make a cleaning agent for later use.

[0060] Cleaning of diamond film with cleaning agent: In a tank, use diamond film as anode and graphite as cathode, add the above cleaning agent between the two electrodes and add 10 times 10 trillion deionization as electrolyte, put the LCD display into the flower basket, soak in Among them, the voltage of the two poles is controlled at 10V, the current is at 40A, and the room temperature is cleaned for about 6 minutes.

[0061] Cleaning agent cleaning: add 10 times of 10 trillion deionization to the above cleaning agent and put it into the second tank, and heat it to 55°C, take the LCD flower basket out of the first tank, put it into the second tank, and use ultrasonic cleaning for about 6 minutes.

[0062] Diamond film cleaning: In the t...

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PUM

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Abstract

An electrochemical cleaning method for the LCD screen includes such steps as preparing detergent from amine alkali, non-ionic surfactant and water, cleaning with diamond film along with said detergent, washing with said detergent, cleaning with diamond film, ultrasonic rinsing in water twice, showering and baking.

Description

technical field [0001] The invention belongs to the cleaning field of the electronic industry, and in particular relates to an electrochemical cleaning method suitable for liquid crystal display screens. Background technique [0002] With the development of microelectronics technology, the market demand for various electronic products is also increasing. At present, various flat panel displays represented by liquid crystal displays (LCDs) have developed rapidly, and the 21st century will be an era of great development of new flat panel display technologies. Liquid crystal is a kind of liquid crystal, which is a rod-shaped column-shaped symmetrical molecule, which has a strong electric dipole moment and easily polarized chemical groups, and appears as an anisotropic liquid. Liquid crystal displays have the characteristics of low voltage and low power consumption, and are suitable for matching with complementary metal-oxide-semiconductor transistor (CMOS) integrated circuits....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B3/10B08B3/08
Inventor 刘玉岭李薇薇常明潘鹏
Owner TIANJIN JINGLING MICROELECTRONIC MATERIALS CO LTD
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