Thin films, coatings and deposition techniques

Thin films and coatings are deposited in the BMTG using multipurpose vacuum thin film deposition setup, electrolytic coating methods or wood distillate coating techniques.  In addition to basic research related to these techniques, these deposition techniques are in studies related to cell attachment and growth, antibacterial studies, new biosensors, implant coatings and a wide variety of other industrial applications such as corrosion and wear resistant coatings for tools, instruments, etc.

USPLD (Ultra Short Pulsed Laser Deposition) method and thin films

Pulsed laser deposition is a physical vapor deposition process, carried out in a vacuum system, that shares some process characteristics common with molecular beam epitaxy and some with sputter deposition. USPLD is a powerful method to grow thin films and multilayers of complex materials. By using a proper coating, e.g. the mechanical or surface properties of a base material can be significantly improved. Almost any solid material can be used as a source and deposition can be carried out at room temperature even on heat sensitive substrate materials. Highly adherent films are achieved due to high energy plasma and surface texture can be varied by selecting proper set of process parameters. Method can be used for biomaterial and medical coating applications as well as in many industrially important thin film applications.

Sputtering equipment

Within the sputtering process, gas ions out of plasma are accelerated towards a target consisting of the material to be deposited. Material is detached (sputtered) from the target and then deposited on a substrate in the vicinity. The process is realized in a closed recipient, which is pumped down to a vacuum base pressure before deposition starts. Method can be used for similar applications as in USPLD case.

Wood distillate coatings

We have developed a novel method to coat metal with wood distillate-based composite coating. The polymer composite coating is not dissolved in acids, bases or solvents at room temperature, is very flexible and durable. Furthermore, since the coating provides a good protection against corrosion, scratching and wear, it has a high potential for several applications.

 

For more information:

Hannu Korhonen, tel. +358 50 546 8210

Reijo Lappalainen, tel. +358 40 355 2564

firstname.lastname@uef.fi