Topographically precise thin film coating system

Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering

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20429808, 20429811, C23C 1434

Patent

active

061206563

ABSTRACT:
Both methods and apparatus are presented for achieving topologically precise thin film coating. The system focuses on coating systems to create compact discs using DC magnetron sputtering to avoid the occurrence of mousebites or visual imperfections at the termination edge on a masked substrate. Circuit elements are added to a switch-mode power supply which acts to substantially reduce reverse currents after the signal is conditioned by rectifying and filtering a switched output. Fast acting diodes, placed in either series or parallel arrangements within the circuit involving the cathode and anode, are used with a low energy storage switch-mode power supply to completely eliminate the occurrence of mousebites on the aluminum coating or the polycarbonate substrate of the compact disc.

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