CVD - Chemical Vapour Deposition

CONDIAS is the world leader in the production of polycrystalline diamond coatings for various applications such as diamond electrodes or wear protection. With the help of our in-house developed CVD reactors conductive diamond electrodes are produced at 2200 to 2600°C. The unique selling point of CONDIAS is the production on very large areas. We are the only manufacturer who is able to produce diamond coatings on half a square meter, and this with several machines. We work together with different partners worldwide on technological projects in which both our products and our know-how are valued to further develop technologies for our partners.

Conductive diamond layers are produced in an activated gas phase. In this chemical vapour deposition (CVD), the gas phase consisting of hydrogen and additions of methane - for diamond formation - and a gaseous boron compound is activated by hot wires (hot filament, HF).

The electrode substrates are brought into contact with this gas phase after a special pretreatment. If suitable base body temperatures between 600°C and 900°C are maintained and activation conditions are met, a coherent polycrystalline diamond layer is formed on the electrode surface, into which boron is additionally incorporated during deposition.

The conductivity of these HFCVD diamond layers can be adjusted by the amount of boron incorporated for use as DIACHEM® electrodes.

Our CVD reactors allow coating on areas up to 100 x 50 cm².