Patent ID: 7048824

Claim:
A device for treating objects, in particular silicon wafers, with a fluid, comprising (a) a container for accommodation of the fluid, said container having adjacent bearing blocks; (b) a rotatable carrying arrangement, which is at least partially disposed in the container, serving for accommodation of the objects to be treated; and (c) a rotatably drivable shaft, which is run on at least one bearing and joined to the carrying arrangement; (d) with the at least one bearing including (i) a first bearing member joined to the shaft, (ii) a second bearing member in the vicinity of the first bearing member, said second bearing member containing high temperature superconductive material which is maintained at temperatures at which the superconductive material is superconductive, (iii) with the first bearing member being kept spaced and stabilized from the second bearing member by magnetic forces, (iv) a third bearing member around the second bearing member, the third bearing member consisting of a protective coating and a supporting layer providing a vacuum gap and producing thermal insulation of the second bearing member; and (v) a fourth bearing member comprising a cooling jacket combined with activated carbon cells for cryo-pumping an insulating vacuum.