Functional coating materials for optical applications, shaping, anti-corrosives

Functional Coating Materials

We develop materials and coating processes for the functionalisation of surfaces of molds, forming tools, medical and micromechanical as well as optical components and adapt the processes to industrial standards. One outstanding research topic is the investigation of self-organizing, structure-forming phenomena during layer growth and the exploitation of these phenomena to control surface properties such as reflection, wetting, adhesion and haptics. A unique feature of this department is the extensive knowledge about the relationship between coating deposition parameters and the resulting microstructure and internal stresses of the coating. Another area of work is the development of layered materials or even nanolaminates with strong barrier properties with the aid of simulations for high temperature applications. 

Services 

Development of tool coatings that are temperature and thermoshock- resistant for rapid injection molding and hot embossing processes

Development of nano-structured layers for replication tools to produce functionalized components (anti-reflection, wetting)

Development of solderable layers for glass, plastic and silicon components

Qualification of coatings in terms of wetting with other media, thermomechanical loads, conductivity and optical response

Development of high temperature stable, anti-adhesive tool coatings for molding of environmentally friendly unleaded glass

Development of new biocompatible layer materials with defined micro and nanostructures for medical implants

Investigations into layer properties and layer functions under the influence of thermal und mechanical loads

Topics

 

Functional nanostructures for optics and microsystems


Component function can be controlled to a great extent through surface structuring. Optical, medical and tooling technology applications each require different surface textures on a micro and nano scale. These are generated by exploiting the self-organization effects during the growth of PVD layers. For instance: surfaces can be made water and dirt proof, the cell adhesion on the surface of an implant can be controlled, and polymer components ...

 

Forming layers


We research anti-adhesive, contact-inert and highly temperature-resistant layer systems for the precision hot forming of glass and polymers. For mineral glass, we mainly use highly temperature-resistant sintered systems and layers containing precious metals. We also develop organic layer materials for polymer processing that improve demolding conditions and prolong tool service life. We develop innovative layer-by-layer coating processes for the complex coatings of high-aspect structures...

 

Layer analysis of coating performance


The operational behavior of layers is largely determined by the deposition conditions during application and the resultant material properties such as chemical composition, microstructure and stress state. Material compositions are characterized in their relationship to depth using optical glow discharge spectroscopy. Temperature-dependent residual stress states in the layers are identified via a heated interferometer. The analyses enable us to identify...

 

Publications regarding Functional Coating Materials


Contributions to newspapers, books and conferences as well as dissertations and project reports...

Patents

Patent DE 100 39 208 A1 Fh-IWM: Procedure for manufacturing a tool with which to create functional optical surface structures in the sub-µm range, including the related tool itself.

DE 102 00 40 19951 A1 Fh-IWM: Device with scratchproof technical surface with optimized wetting properties as well as a process to manufacture the device.

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