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Analyze the reasons why the plasma cleaning machine technology is so popular in the mobile phone LED industry:

Analyze the reasons why the plasma cleaning machine technology is so popular in the mobile phone LED industry:

As a new method for surface modification of materials, plasma scrubbers have attracted much attention due to their advantages of low energy consumption, low pollution, short treatment time, and remarkable effects. Among many modification methods, low temperature plasma cleaning is a method that has developed rapidly in recent years. Compared with other methods, plasma cleaning has many advantages: First, plasma cleaning is a drying process, which is different from the elimination of wet chemical treatment, wastewater treatment, etc. Compared with other drying processes such as radiation, electron beam, corona, etc., which are indispensable drying processes, the uniqueness of plasma cleaning machines is that the effect on the material only occurs in the range of tens of thousands of angstroms on its surface, and at the same time The surface properties of a material can be changed without changing its bulk properties. Ultra-low temperature plasma scrubbers are widely used in mobile phones, automobiles, electronic circuit boards and other production fields. Due to the ionization, recombination, excitation and migration of atoms in the plasma, ultraviolet rays are generated, and the photon energy is also in the range of 2~4eV. Obviously, in plasma, the energy provided by particles and photons is very high. In fact, the main function of the plasma scrubber is not to clean, but to modify the surface of the material. By treating the surface of the material, the bonding ability of the material can be improved, and the problems of bonding, painting, printing and dyeing can be solved. The actual cleaning is to use ultrasonic washing and drying. The plasmaization process is usually followed by ultrasonic cleaning, where the surface of the material is ultrasonically cleaned, then modified by plasma surface treatment, and then bonded or coated. There are many industries in which plasma cleaning machines are used, and customers often take all kinds of wonderful samples to deal with, such as various small toy accessories, cloth

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How plasma etching of LDPE films is described today

How plasma etching of LDPE films is described today

How plasma etching of LDPE films is described today Plasma modification has the following main advantages. ① It is a dry process, which meets the current demand for energy saving and environmental protection. ②No special requirements for the material to be treated, which has universal applicability. ③ Short processing time, only a few seconds to a few minutes. ④Only the surface layer of the material is modified, and no damage is caused to the substrate itself. Therefore, plasma technology has a better application effect compared with traditional modification technology. Plasma is a non-condensed system produced by complete or partial ionization of the gaseous state, the so-called "ionization" means that at least one electron is separated from the atom or molecule, so that the atom or molecule is converted into a positively charged ion. This system includes atoms, molecules, ions in excited and sub-stable states, etc. The system has an equal number of positive and negative charges inside and is electrically neutral on a macroscopic scale. The application of plasma technology is particularly significant in materials science, where new materials are developed by modifying their surfaces through plasma technology in order to achieve higher performance, which is an important tool in the current development of new materials. Plasma modifies the surface of a material, usually by impacting the surface of the material and breaking the original chemical bonds to form new ones. Most of the ion energies in plasma, except ions, are higher than the bonding energy of chemical bonds. This indicates that plasma can break the chemical bonds on the material surface and form new bonds. Plasma treatment for surface modification is to expose the material to the plasma of non-polymeric gas and bombard the surface of the material by the plasma to cause changes in the polymer structure, thus achieving the purpose of surface modification of polymer materials. Plasma treatment is mainly for inert gases. Organic polymer materials are treated with oxygen, nitrogen, hydrogen, argon and other non-polymeric inorganic gases in contact with air, which introduce functional groups on the surface and form cross-linked structural layers or generate free radicals. In general, the surface hydrophilicity is substantially increased after plasma treatment of the surface. The crystallinity and timeliness of PET films after surface modification were investigated. The water contact angle of the films decreases with increasing energy density after treatment under dielectric blocking discharge conditions, and the highest crystallinity is biaxially stretched with the smallest contact angle of PET films. The air plasma had the most significant etching effect on the LDPE films and therefore the most prominent change in surface morphology, and the peel strength after bonding was significantly higher compared to that before treatment under optimal conditions. This is due to the interaction of the reactive groups generated by the air plasma with the LDPE surface phase thus increasing the reactive particles and attracting oxygen-containing groups. In addition, due to the time-sensitive nature of plasma treatment, the treatment should be immediately followed by the next process. After the plasma jet treatment of PTFE, the hydrophilic properties of the material surface are enhanced. From SEM pictures, it was found that the treated PTFE surface produced dense micron-sized particles, which led to an increase in surface roughness, and these particles increased in density as well as roughness with increasing treatment time. This is due to the breakage of the C-F bond on the PTFE surface to introduce oxygen-containing groups.     After plasma modification treatment, the hydrophilicity and surface roughness of the material surface were greatly increased and showed a linear increase with the working pressure. The increased nitrogen content after plasma treatment improves the biocompatibility of the polycarbonate. Translated with www.DeepL.com/Translator (free version)

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Now plasma technology for fiber surface modification is also widely noticed

Now plasma technology for fiber surface modification is also widely noticed

 Since the 21st century, with the rapid development of science and technology and modern industry, new materials of various functions have emerged to meet the development needs of various industries. At the same time, this has also led to the development and advancement of various surface modification technologies. Plasma surface modification refers to the activation modification by exposing the material to a non-polymerized gas plasma and bombarding the material surface with plasma to cause changes in the material surface structure. Generally, the surface modification of the functional layer is very thin (a few nanometers to hundreds of nanometers) and does not affect the overall performance of the material; after modification, the material surface can be hydrophilic, anti-abrasive, decorative, coloring, printing, adhesive, antistatic, etc.        Now plasma technology for fiber surface modification is also widely noted. Plasma treatment of carbon fiber surface can improve the adhesion and ensure that the fiber tensile strength does not decrease. In addition, plasma treatment can also eliminate surface micro-cracks of carbon fibers, reduce stress concentration and improve the tensile strength of the fibers themselves. Plasma treatment of Kevlar fiber, aramid fiber is also effective. PET fiber is widely used, but the dyeing, moisture absorption, anti-fouling properties are poor, after plasma treatment, the introduction of polar groups on the surface, the generation of free radicals, cross-linking layer, effectively improve a variety of properties.        Electronic components, automotive parts and other industrial components in the production process due to cross contamination, natural oxidation, solder, etc., the surface will form a variety of dirt, these pollutants will affect the quality of the components in the subsequent production of welding, bonding and other related processes, reducing the reliability of the finished product and pass rate. Plasma treatment treats the surface of the workpiece by chemical or physical action, and the reaction gas ionizes to produce highly reactive reaction ions that react chemically with the surface contaminants for cleaning. The choice of reaction gas needs to be based on the chemical composition of the contaminant. Chemical reaction-based plasma cleaning speed, good selectivity, better cleaning effect on organic pollutants. Surface reaction to the physical role of the main plasma cleaning is very commonly used is the use of argon, will not produce oxidation by-products, etching effect isotropic. In general the plasma surface modification process, the chemical reaction and physical action is co-existing, resulting in a better selectivity, uniformity and directionality.        Due to the development direction of precision and miniaturization in the industrial field, plasma surface modification technology with its fine and clean, non-destructive modification advantages in the semiconductor industry, chip industry, aerospace and other high-tech industries will also have increasingly important application value.

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