Patent ID: 7163438
Filing Date: 2007-01-16
Classification: B24B

Abstract:
1. A chemical mechanical polishing apparatus for planarizing semiconductor substrates having irregular topography, comprising: a polishing head assembly for holding a substrate therein and for rotating said substrate while in polishing contact with a polishing pad; a polishing table for supporting and rotating said polishing pad thereon; a dressing head for oscillating against the top surface of said polishing pad to restore texture to said polishing pad; a slurry dispensing manifold having a first end suspended over said polishing pad, and a second end for mounting to said chemical mechanical polishing apparatus; and a linear array of slurry dispensing nozzles positioned under said suspended manifold, each nozzle is fed from a bifurcated supply lines, and each branch of said bifurcated supply lines having an adjustable flow control valve, a flow meter, and a check valve.