LiMedion offers PVD coatings, galvanic coatings or sol-gel coatings

Tribological coatings:

For anti-wear or low-friction coatings, the mechanical coating properties (hardness, residual stress, etc.) play the most important role along with adhesion. The PVD coatings we deposit can make full use of their advantages here: low coating thickness, excellent adhesion and high density. Examples from practice are low-friction carbon coatings, hard titanium nitride (TiN) or chromium nitride (CrN) coatings, or silicon carbide (SiC) coatings.

Decorative coatings:

Product enhancement through the deposition of various metallic decorative layers, e.g. gold, chrome, nickel or copper, which can be made highly lustrous or matte depending on the substrate surface. Decorative coatings at Limedion are usually deposited by PVD or electroplating. For some applications, scratch or tarnish protection is required (e.g. for silver coatings). In this case, we apply an additional transparent ceramic top layer to the decorative coatings.

decorative layers at Limedion

Optical coatings:

  • Transparent, electrically conductive PVD coatings (TCO) that are widely used in flat panel displays and solar cells, e.g. indium/tin oxide (ITO) or aluminum-doped zinc oxide (AZO).
  • passive optical PVD coatings and complex coating systems that can selectively block out or reflect wavelength ranges, e.g. magnesium fluoride (MgF2)/silicon dioxide (SiO2)
  • Transparent, scratch-resistant coatings that, when applied to glass or plastic, lead to a significant extension of the lifetime of the substrates, e.g. silicon dioxide (SiO2) or aluminum oxide (Al2O3)

Barrier coatings:

Barrier coatings are used to protect products against inward or outward diffusion of active ingredients. Typical examples are coating of containers against oxygen diffusion, metallization of polymer products to achieve electrical conductivity or electromagnetic shielding. The PVD technology used at Limedion allows the production of dense, low-porosity coatings with good adhesion at deposition temperatures between room temperature and 150° C, making it well suited for use on many plastics.

Coatings for medical devices and medical technology:

Coatings on medical devices such as implants or sensors are intended to increase compatibility or improve functionality. Our biocompatible PVD coatings and sol-gel coatings are ideally suited, for example, as a depot for active ingredients, can be designed to be hydrophilic or hydrophobic, or protect sensitive biosensors.

Dental drills coated in the PVD coating machine at Limedion

Coating techniques


Deposition of coatings:

  • Vacuum deposition (PVD)
  • Magnetron sputtering with DC, unipolar pulsed (PVD)
  • Deposition by decomposition of chemical compounds on hot surfaces (CVD)
  • Electroplating
  • Sol-gel coating
PVD machine Leybold-Heraeus at Limedion

Analytical characterization of coatings and surfaces:

  • X-ray photoelectron (XPS analysis) and Auger spectroscopy (AES)
  • Scanning electron microscopy (SEM), optical microscopy
  • IR and UV-Vis spectroscopy
  • Atomic absorption spectroscopy (AAS)
  • Electrochemical analysis
  • Hardness measurements
  • Adhesion tests, roughness measurements.


  • Metallic coatings (PVD or electroplated)
    e.g.: Aluminum, titanium, chromium, molybdenum, copper, zinc, zirconium, silver, tantalum, rhenium, gold.
  • Nitride or oxide coatings (PVD, CVD or sol-gel)
    e.g.: Aluminum oxide(Al2O3), titanium dioxide (TiO2), indium/tin oxide (ITO), silicon dioxide (SiO2), chlorine nitride (CrN).
  • Halide or carbide coatings (PVD or sol-gel)
    e.g.: Magnesium fluoride (MgF2), Calcium fluoride(CaF2), Silicon carbide (SiC).
Gold plating in the PVD machine at Limedion