Patent ID: 6660140
Filing Date: 2003-12-09
Classification: C23C,H01J

Abstract:
Sputtering apparatus for depositing material onto a workpiece, said apparatus comprising:a chamber; a first target disposed in the chamber; a workpiece support located in the chamber opposite the first target; an RF coil disposed in the chamber between the first target and the workpiece support, said RF coil including a re-sputtering surface of electrically conductive non-target material which faces towards the workpiece support and is in shadow relative the first target and which receives a coating of target material for re-sputtering onto the workpiece; a second target interposed between the RF coil and the workpiece support which includes a sputtering surface which confronts the re-sputtering surface which is in shadow relative the first target and which supplies at least a portion of the coating of target material to the re-sputtering surface which is in shadow relative the first target; and means for biasing the first and second targets; wherein the second target is disposed generally between an outer periphery of the support and an outer periphery of the RF coil; wherein at least a part of the sputtering surface of the second target is inclined away from the RF coil and towards the support.