Patent ID: 6099387
Filing Date: 2000-08-08
Classification: B24B

Abstract:
An apparatus for polishing a semiconductor wafer having first and second sides and a central opening, comprising:a mandrel for holding the wafer;a motor coupled to the mandrel and being operable to rotate the mandrel; anda first polisher assembly having a first polish pad for polishing the first side of the wafer and a second polish pad for polishing the second side of the wafer, and a first caliper assembly having a first finger having a first end coupled to the first polish pad and a second end pivotably coupled to a member, and a second finger opposable to the first finger and having a third end coupled to the second polish pad and a fourth end pivotably coupled to the member, and a power screw threadedly coupled to the first and second fingers and to a motor being operable to rotate the power screw clockwise and counterclockwise to pivot the first and second fingers.