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Matter in the plasma state has a high and unstable energy level. If the plasma comes into contact with solid materials (such as plastics and metals), its energy will act on the solid surface and cause the important properties of the surface (such as surface energy) to change. In various manufacturing applications, this principle can be used to selectively modify the surface properties of materials. Using Guoxing technology smartplasma plasma energy to treat the surface of the object can accurately and targeted improve the adhesion and wettability of the material surface. In this way, it is convenient to use new (or even completely non-polar) materials in the industry, as well as environmentally friendly, solvent-free, and volatile organic compound-free coating adhesives. At present, many chemical surface treatment processes can be replaced by Guoxing technology smartplasma plasma treatment technology. In which areas is Guoxing technology smartplasma mainly used and what role does it play? Surface activation of PTFE (Teflon plasma activation) high-frequency plate copper-immersed front hole wall (Modification): Improve the bonding force between the hole wall and the copper plating to prevent black holes and blowouts after high-temperature welding. Solder mask and activation before characters: Effectively prevent solder mask characters from falling off. The through holes and blind/buried holes of the HDI board laser remove the carbide burned by the laser (Laser). Not subject to the requirement of pore size, the effect of micro-holes with pore size less than 50 microns is more obvious (Micro hole, IVH, BVH). Removal of dry film residues when making fine lines (removal of film) The PI surface is roughened before the rigid-flex board is laminated, and the PI surface is roughened before the flexible board is reinforced: the tensile value can be increased by more than 10 times. Finger and pad surface cleaning before chemical gold plating/electroplating: remove foreign matter such as solder mask ink to improve adhesion and reliability. Some larger flexible board factories have replaced the traditional plate grinding machine with plasma (the plate before the gold plating is plated by plasma). Clean replace). After chemical gold/electroplating, the surface of the SMT pad is cleaned; the solderability is improved to prevent false soldering and poor tinning, and improve the strength and reliability. PCB board BGA package front surface cleaning, gold wire WIRE DieBonding pretreatment, EMC package pretreatment: improve wiring/connection strength and reliability (removal of solder resist ink and other residues) LCD field: The module board removes pollutants such as gold finger oxidation and glue overflow during the process of pressing the protective film, and the surface of the polarizer is cleaned before bonding. IC semiconductor field: semiconductor polishing wafer (Wafer): remove oxide film, organic matter; clean micro-pollutants in COB/COG/COF/ACF and other processes to improve adhesion and reliability. LED field: clean the surface of the pad before wire bonding to remove organic matter.
Guoxing technology smartplasma plasma can make many modifications to polymer medical materials: (1) Improve biocompatibility, including blood compatibility and tissue compatibility; (2) Form a cross-linked outer surface layer to reduce the penetration of low-molecular-weight materials in the data, or to relieve the drug. Or maintain medical equipment; (3) Supply substrates that can immobilize biomolecules. PU, PVC, PTFE, PP, PMMA, PC, Ps, etc. have been studied more. After the natural collagen biomaterials are modified by glow discharge plasma, carboxyl groups are introduced into the surface, which advances the biocompatibility and the polarity of the appearance, which is beneficial to the compounding with other polymers. Using O2 and Ar plasma to treat the surface of natural collagen film, the appearance, internal structure and chemical composition of the collagen data will change significantly after the plasma cleaner is processed. Low-temperature plasma is useful for surface modification of the collagen data.
Guoxing technology smartplasma plasma cleaning needs to pay attention to some restrictive factors in the application, mainly in the following points: This method cannot be used to remove the cutting powder on the surface of the object, which is especially obvious when cleaning the grease on the metal surface. Practice has proved that it cannot be used to clear thick oil stains. Although using plasma to clean a small amount of oil stains attached to the surface of the object has a good effect, the removal effect of thick oil stains is often not good. On the one hand, it is used to remove the oil film, and the treatment must be extended. In the meantime, the cleaning cost is greatly increased. On the other hand, it may cause the unsaturated bonds in the molecular structure of the grease stain to polymerize, coupling and other complex reactions in the process of contact with the thick grease stain to form a harder resin. It is related to the three-dimensional network structure. Once this type of resin film is formed, it will be difficult to remove. Therefore, plasma is usually used to clean oil stains with a thickness of less than a few microns.
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