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Functional principle
Functional principle of the plasma process
Low-pressure plasma is a vacuum process. Reactive gases are fed into a vacuum
chamber and are ionized by electrical energy (MHz, GHz, kHz). The gases
activated in such a way react with the surface of the work piece changing its
surface characteristics. The reaction products created are drawn off and can be
exhausted to air.
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Elemental processes in the plasma. Example: Oxygen
By means of alternating current pulses, oxygen molecules are fragmented (radicalized), ionized and electronically excited. The reactivity of these species causes chemical modification of surfaces.
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PLASMACLEAN©:
Precision cleaning (degreasing) in oxygen plasma
By means of oxygen radicals and ions, organic bonds like those in oils and greases (hydrocarbons) are split and removed as small molecules or atoms. These chemical reactions mainly produce carbon dioxide and water as decomposition products
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ACTIPLAS©:
Making plastics wettable
Oxygen radicals and ions react with the homopolar plastic surface and form polar hydrophilic groups, which convert a non-wettable plastic into a wettable one. The modification of plastics is only effected in the upper molecular layers, without affecting the properties of the material.
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Coating of materials (Plasma polymerisation)
By means of plasma polymerization thin layers in the µm-rage can be deposited in the gas phase. The selection of the monomers to be deposited determines the modification of the layer to certain defined properties, like being hydrophilic, hydrophobic, adhesive, non-stick, anticorrosive, barrier-forming, etc. The deposition of AQUACER©-, CARBOCER© - (Diamond-Like-Carbon = amorphous diamond-like layers), and CLEARPROTECT©-layers (transparent and protective coatings) on different materials are particular applications in the field of plasma polymerization.
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Epilamisation in low-pressure plasma
When plasma epilamizing a material, the surface becomes hydrophobic by means of a polymerization process called LIPOCER©. Consequently, an oil droplet can be kept at a certain point on the surface for specific lubrication - to cite one example
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GERMANY: PLASMA ELECTRONIC GmbH, Otto-Lilienthal-Str. 2, D - 79395 Neuenburg, Tel: +49 (0)7631 7017 - 0, Fax: +49 (0)7631 7017 – 20, > email
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