Method and system for coating sections of internal surfaces

Details Method and system for coating sections of internal surfaces Method and system for coating sections of internal surfaces

2005-03-07

2009-10-27

Kackar, Ram N. (Department: 1792)

Coating apparatus

Gas or vapor deposition

C118S7230AN, C118S050100, C427S523000, C427S524000, C427S059000

Reexamination Certificate

active

07608151

ABSTRACT:
A method and system for coating the internal surfaces of a localized area or section of a workpiece is presented. Conductive structures are inserted into one or more openings of a workpiece to define the section to be coated. In some embodiments, a bias voltage is connected to a workpiece section, which functions as a cathode. A gas source and vacuum source are coupled to each conductive structure through a flow control system. The flow control system enables a first opening to function as a gas inlet and a second opening to function as a vacuum exhaust. Only the section encompassed by the conductive structures is coated. When the coating process is completed, a means for varying the conductive structures along the length is utilized to move onto the next section to be coated.

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