Patent ID: 8425687
Filing Date: 2013-04-23
Classification: B05C,C25D,H01L

Abstract:
1. An apparatus for wetting a workpiece having front and back surfaces, the apparatus comprising: a chamber arranged to operate at a reduced pressure; a workpiece holder disposed in the chamber, the workpiece holder comprising: a body comprising a surface, the body defining a cavity extending from the surface; a ring adapted to retain the workpiece on the surface of the body over the cavity, the ring forming a fluid seal relative to the workpiece and to the workpiece holder; and a port defined in the body and in communication with the cavity, the port affecting pressure in the cavity to reduce a pressure differential between the front and back surfaces of the workpiece; and a fluid port in communication with the chamber, the fluid port delivering a fluid to wet the front surface of the workpiece during operation of the chamber at a reduced pressure relative to atmosphere.