Patent ID: 9082595
Filing Date: 2015-07-14
Classification: C23C,H01J

Abstract:
1. An apparatus for coating of a substrate, comprising: an evacuable chamber; a rotatable cylindrical target mounted inside said chamber, where on a surface of said target a sputter area is being sputtered when said apparatus is operative; a tubular shutter, said shutter being axially extendable to an extended position and retractable to a retracted position, said shutter substantially covering said sputter area in the extended position and said shutter substantially uncovering said sputter area in the retracted position; a gas distribution system configured to supply gas in a gap between said target and said shutter; a DC voltage source configured to apply a DC voltage between said target and said shutter until a plasma ignites such that said shutter is configured to be electrically biased relative to said target; and a plurality of magnets arranged in a fixed magnet array disposed within said target, said target being movable relative to said magnet array, wherein said shutter provides a gastight enclosure around said target only when said shutter is in the extended position, and said gas distribution system is arranged inside of an inner perimeter of said shutter when said shutter is in the retracted position.