Why does plasma processing machine play an irreplaceable role on LCD panels?

In the LCD panel industry, in the past, the hot pressing method was used to connect the display screen and flexible film circuit to the production process of LCD panels, touch screens, laptop displays, and other products. The flexible film circuit was directly bonded to the LCD glass with wiring points through heating and pressure. This process requires the glass surface to be clean, but in actual production, storage, and transportation, the glass surface is prone to contamination. If not cleaned, fingerprints or dust will inevitably appear.

During the installation process of glass substrates, when the chips are bonded and hardened at high temperatures, the surface of the bonding filler is analyzed for the composition of the base layer coating. In addition, there are also connecting agents that contaminate the bonding filler. Because these pollutants can be removed by plasma cleaning before the hot pressing bonding process, the quality of the hot pressing bonding can be greatly improved, the surface wettability is improved, the adhesion is also improved, and the problem of circuit corrosion is reduced.

When the surface of plasma surface treatment machine requires high smoothness, plasma cleaning activation machine should be used for cleaning, deposition, and bonding treatment to avoid damaging the smoothness of the material surface.

After plasma activation, the water droplet penetration effect on the material surface is significantly stronger than other treatment methods. We used a plasma surface treatment machine to complete the cleaning test of the mobile phone screen and found that the surface of the mobile phone screen after plasma treatment was completely soaked by water.

At present, the biggest problem in this packaging and assembly process is the organic pollution at the bonding filler and the oxide film formed during electric heating. The bonding strength of these parts decreases, and the sealing strength of the resin after packaging decreases, directly affecting the assembly level and sustainable development of these parts because there are pollutants on the bonding surface. In order to improve the assembly capability of these components, 

everyone is making every effort to process them. During the packaging process, surface treatment can be carried out by introducing plasma plasma surface treatment machines, which can greatly improve the quality. The following is about the application role of plasma treatment machines in the field of liquid crystal glass:

1. In the production of LCD panels, glass substrates are contaminated with organic matter, such as residual photoresist, fingerprints, oil stains, and particulate impurities. Plasma surface cleaning machines use high-energy particles in plasma to undergo physical and chemical reactions with these pollutants, decomposing organic matter into volatile substances such as carbon dioxide and water. At the same time, they remove particulate impurities through ion bombardment, thereby obtaining high cleanliness of the glass substrate surface.

2. After plasma cleaning, the hydrophilicity of the glass substrate surface will be significantly improved. The plasma interacts with the glass surface, introducing polar groups such as hydroxyl groups to increase surface performance, which is beneficial for the subsequent uniform coating and further increase adhesion of liquid crystal materials.

3. Under normal circumstances, the electrode surface is prone to forming an oxide layer during the production process, which affects its conductivity and bonding performance with other materials. Through the reduction effect of plasma, the plasma cleaning machine can remove the oxide layer on the electrode surface and restore its good conductivity.

4. Plasma cleaning can generate micro roughness on the electrode surface, increase surface area, and introduce active groups to improve surface activity. This helps to improve the bonding force between the electrode and liquid crystal materials, photoresist, etc., ensuring the stability and reliability of the electrode in the liquid crystal panel.

5. During the packaging process of the LCD cell, it is necessary to clean and activate the frame. The plasma cleaning machine can remove pollutants from the surface of the frame, improve its surface ability, and enable the sealant to better bond with the frame, forming a good sealing effect and preventing liquid crystal leakage.

6. During the photolithography process, plasma cleaning machines can be used to remove residual photoresist after photolithography. The high-energy particles in the plasma can effectively decompose the organic components in the photoresist, completely removing the photoresist without damaging other structures of the color filter.

In summary, plasma processing machines can improve the surface performance of liquid crystal glass, such as improving surface flatness and uniformity, which is beneficial for subsequent coating, printing and other processes, thereby improving the optical performance and quality of products.