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[ PLASMA CLEANING OF SURFACES ] Ion bombardment cleans surfaces physically (sputtering) and, depending on the gas, also chemically. The contamination is vaporized and sucked away. Applications of plasma cleaning: Removing grease, oil, oxides or silicone Pre-treatment and preparation for bonding, soldering or gluing Pre-treatment for finishing metals [ ACTIVATION OF SURFACES ] Plasma treatment of a plastic surface with e.g. oxygen. Radicals are being formed which lead to a good adhesion of finish and glue. Applications of plasma activation: Pre-treatment of plastics for gluing Pre-treatment of plastics for finishing Treatment before printing [ ETCHING OF SURFACES ] Etching of the surface with a reactive process gas. Material is removed, vaporized and sucked off. Therefore the surface area is enlarged. Applicationso plasma etching: e.g. structuring of silicon Good adhesion of finish and glue on high temperature resistive plastics like PTFE, PFA and FEP. [ DEPOSITION OF SURFACES ] A gas [ for example Hexamethyldisiloxane (HMDSO), Hexamethyldisilazane (HMDSN), Tetraethylen glycol dimethyl ether, C2F6, ¡] is introduced to the plasma chamber. Because of plasmapolymerization, layers will be deposited on the surface. Applications of plasma coating: Deposition of hydrophobic layers Deposition of hydrophilic layers Application e.g. as diffusion barrier |
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