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The Leibniz Institut für Kristallzüchtung (IKZ) is one of the leading institutions in the field of growth of crystalline solids. They play a fundamental role in photovoltaics, micro-, opto- and power electronics, sensor technology, optics and laser technology. The research topics range from basic research to industrially applicable growth methods. The IKZ is legally represented by the Forschungsverbund Berlin e.V. and is a member of the Leibniz Association.

In the team „Aluminium Nitride (AlN)“ we offer from now on a


                 Master Thesis

with the topic:

„Waferbonding-technologies for AlN-crystal growth at temperatures > 2000°C“

Within the scope of the Master's thesis
, various fixation options, e.g. adhesive/sintering techniques or thermally activated metallic or ceramic intermediate layers, are to be evaluated and optimized on the basis of the knowledge gained. Of particular interest are the chemical-thermodynamic reactive and diffusive processes, reaction products and the resulting microstructures at the joint interface after attachment and after heating to a growth temperature of more than 2000°C. The focus will be laid on the experimental work.Among other things, AlN substrates are important for the development of novel UV light emitting diodes that can fundamentally improve the disinfection of medical equipment, for example. For this purpose, AlN crystals are produced in a sublimation process at temperatures of over 2000°C. The crystal grows on an AlN seed-disk attached to the crucible lid made of tungsten (W) or tantalum carbide (TaC). The attachment is crucial for the crystal properties; and there is still a need for improvement with interesting scientific tasks.

The work is carried out at the IKZ. The IKZ offers excellent equipment and extensive competence for the preparation (e.g. polishing, bonding) and characterization (e.g. TEM) of the interfaces. The master thesis is carried out in the environment of the BMBF-funded consortium "Advanced UV for Life".

We expect a successfully completed Bachelor's degree in chemistry, materials science, physics or related subjects, experimental skills and a careful, team-oriented way of working. A combination with employment as a student assistant of up to 8 hours per week is possible.

Dr. Thomas Straubinger (Tel.: 030/6392-3123, email: and Prof. Matthias Bickermann (email: are at your disposal for technical and organizational information.

Severely handicapped persons with equal suitability will be given preferential consideration. There is equal opportunity for female and male applicants. The Leibniz-Institut für Kristallzüchtung actively supports the compatibility of career and family.

We look forward to receiving your application! Please send your application documents by email to the above mentioned persons or online via our homepage.