Multi-Pass Vacuum Coating Systems
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Dec 29, 2008
filing date -
Dec 27, 2007
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Abstract
A multi-pass coating system and method for applying multiple coatings to substrates traversed through the system. The system includes at least one vacuum pump coupled to the system to establish a sub-atmospheric pressure within the system. The system also includes a least one coating zone where a coating layer is applied to the substrate and includes at least one transfer lock through which the substrates transition between atmospheric pressure outside the system and the sub-atmospheric pressure inside the system. To move the substrates through the system, the system includes a transport mechanism configured to move the substrates at least two times through the coating zone prior to the substrates being exited from the system.
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