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Limedion GmbH, Augartenstraße 110, D-68165 Mannheim, Telefon +49 (0) 621 400 40 56
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PVD Coating

Heating up and evaporating metals, alloys, ceramics and compounds in vacuum and condensing the emerging vapour at a nearby target is the basic physical vapour deposition (PVD) method. At Limedion we can run up to 3 crucibles simultaneously, which allows us to alloy a wide variety of compounds in almost all possible compositions. Typical thicknesses can vary from few nm for optical applications to few µm for corrosion protective coatings. The film thickness is monitored with the oscillating crystal method. An enhanced PVD method consists in an ion beam assisted deposition (IBAD) process which is basically a PVD process simultaneously assisted by the usage of ion beams. The ion guns are run with inert gases or reactive gases (reactive IBAD). The ion energy is a well controllable parameter which allows to fine dose the amount of energy deposited in the film growth area. By matching the ion current density to the evaporation rate it is possible to create variable stoichometries in the growing film. IBAD coatings are normally very dense and show improved adhesion. Important film properties like hardness, friction, intrinsic stress etc. can be influenced by varying the ion beam parameters. The deposition of energy takes place exactly where it is needed – in the growth zone, whereas the main body of the substrate stays almost cold. This predestines this special PVD method for coatings which need energy to gain proper growth, but where the substrate is sensitive against heat, like with polymers.