Optical plastics are gradually replacing glass in many commercial applications. They now cover a broad field of possible uses in automobile headlamps, corrective lenses, compact discs ad protective windows etc. The problem is however that in many cases a widening of the area of the applications is limited because of low wear and scratch resistance of the materials. This is why they share the need for application of ceramic coatings. The cerefully desighed layers deposition on polycarbonate surface are expected to improve their mechanical and tribological properties. One of the primary technologies used in the processing of the ceramic layers of tailored properties is the plasma enhanced Chemical Vapor Deposition (PE CVD).
In this work we report the results of studies on the technology of a-C:H and a-C:N:H layers for applications on polycarbonate. The layers have been deposited using plasma sustained by radio-wave-frequency excitation (RF CVD), at the temperatures not higher than 80 ^oC. In the experiment H₂, CH₄ and optionaly N₂ have been used as gasous precursors. The optimal processing parameters have been indicated for which good adhesive layers can be obtained.
With applications of FTIR, EDS, and AFM techniques the chemical composition, atomic structure and microstructure od the layers have been studied. Additionally the friction coefficient and the tribological properties of the obtained layers have been cerfully analysed.
It has been found that the a-C:H and a-C:N:H layers deposited on polycarbonates with RF CVD method are good adhesive and possess many promising properties. They have high hardness, high wear resistance nad low friction coefficient. Simultaneously they are smooth nad transparent. This allow beliwing that they are good coatings for a wide area of applications.

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