Low-stress polishing device

Abstract

A low-stress polishing device includes a base; a plurality of actuators mounted to the base and spaced from each other in a predetermined interval, each of the actuators having a drive shaft and a buffer spring connected with the drive shaft for providing the drive shaft with a predetermined impulsive pressure, each of the drive shafts having a buffer pad located at a distal end thereof; at least one drive circuit electrically connected with the actuators for control of driving the actuators; a working plate mounted to the buffer pads; and a polishing pad mounted to the working plate. Accordingly, the vibration mode generated by the present invention can provide a dynamic pressure working on the wafer surface for destroying the chemical product on the wafer surface and thus the present invention is applicable to polishing of low-dielectric integrated copper process.

Dependencies are inferred from the claim text.