Patent ID: 6506290
Filing Date: 2003-01-14
Classification: C23C,H01J

Abstract:
A sputtering apparatus comprising:a process chamber; a holding means for holding a substrate, which is located in said process chamber; a pressure reducing means for reducing a pressure in said process chamber to a predetermined pressure; a gas supplying means for supplying a process gas into said process chamber; a plasma forming means for changing the process gas supplied from said gas supplying means, into plasma; a plurality of targets of a deposition material placed opposite the substrate held by said holding means and placed on a concentric basis with each other; a means for adjusting a sputtering yield of each of said targets; a plurality of cylindrical shield rings, each cylindrical shield ring being disposed between adjacent targets so as to extend substantially perpendicularly from said electrically insulating support; a magnetron device placed entirely behind said plurality of targets and disposed behind said electrically insulating support; and an electrically insulating support disposed on a side of said process chamber opposite said holding means, said electrically insulating support bearing said targets on a process chamber side of said insulating support, wherein a height of each of said plurality of cylindrical shield rings relative to said electrically insulating support is different from a height of the remaining plurality of cylindrical shield rings relative to said electrically insulating support.