Patent ID: 11955308
Assignee: KLA CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 13:
14. A method comprising:
rotating a platen within a vacuum chamber, the platen having a surface coated with an amount of anode material, the platen coupled to a first end of a rotary spindle shaft configured to extend through an opening in a wall of the vacuum chamber;
supporting the rotary spindle shaft by a first radial air bearing disposed around the rotary spindle shaft adjacent to the first end, the first radial air bearing configured to support a load in a direction perpendicular to a rotational axis of the rotary spindle shaft;
supporting the rotary spindle by a second radial air bearing disposed around the rotary spindle shaft adjacent to a second end of the rotary spindle shaft opposite the first end, the second radial air bearing configured to support a load in the direction perpendicular to the rotational axis of the rotary spindle shaft;
applying a rotational torque to the rotary spindle shaft by a rotary motor disposed between the first and second radial air bearings, the rotary motor including a rotor coupled to the rotary spindle shaft; and
supporting the rotary spindle shaft by a thrust bearing disposed between the first and second radial air bearings, the thrust bearing configured to support a load in a direction parallel to the rotational axis of the rotary spindle shaft.