CMK The Gallium Arsenide Company

About us

The roots of our company dates back to the 60’s. At that time, it was a part of a big industriel plant for Aluminium oxide production in Ziar nad Hronom and served as a research centre in the field of Gallium and later on Gallium Arsenide processing.


The portfolio of our products covers polycrystalline and monocrystalline GaAs materials – ingots and wafers, metallic Gallium up to 7N purity suitable for production of Ga compound materials for semiconductor industry and B2O3 pellets for many crystals growing processes.

Gallium Arsenide


Boron Oxide


The services we are offering are closely bound to our activities. Our skilful staff is involved mainly in the service of recycling of many GaAs material/waste types, refining of the Gallium metal up to 99.99999 % and our analytical services.



Analytical service

…we recapture, we protect…

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