Patent ID: 8491750

Claim:
A confinement assembly for a semiconductor processing chamber, comprising: a plurality of confinement rings disposed over each other, each of the plurality of confinement rings separated by a space from the other confinement ring, each of the plurality of confinement rings having a plurality of holes defined therein; a plunger moveable in a plane substantially orthogonal to the confinement rings, and a proportional adjustment support affixed to the plunger, the proportional adjustment support configured to support the confinement rings, such that as the plunger moves in the plane the space separating each of the plurality of confinement rings is proportionally adjusted, the proportional adjustment support includes, a plurality of hinged levers disposed over each other, each of the hinged levers include, (a) a non-support segment, and (b) a support leg segment, such that an angle between 90 degrees and 180 degrees is defined between the non-support segment and the support leg segment; pivot interconnections between at least two pairs of the hinged levers, such that each pair of hinged levers is oriented such that the support leg segments face way from each other and each confinement ring is supported by one of the support leg segments.