diamond-like carbon; polycarbonate; ionic species; nozzle and bombard; silicon and polycarbonate; 15–19.5 GPa
Modifications have been incorporated in the conventional microwave-assisted chemical vapour deposition process to deposit diamond-like carbon (DLC) coatings on polycarbonate substrates. In the modified method, the substrates to be coated are placed outside the plasma chamber. An electric field is applied across the microwave discharge. The accelerated ionic species leave the nozzle and bombard the substrates placed in a separate chamber. Using the present technique, DLC films have been deposited on silicon and polycarbonate substrates. These films show chemical inertness and hardness values in the range 15–19.5 GPa.