Patent ID: 6206769
Filing Date: 2001-03-27
Classification: B24B,H01L

Abstract:
A chemical-mechanical planarization system, comprising:a support surface;a polishing pad positioned on the support surface, the polishing pad having a hydrophobic planarizing surface;an aqueous abrasive medium on the planarizing surface;a wafer carrier positionable over the polishing pad, wherein at least one of the polishing pad and the wafer carrier moves with respect to the other to impart relative motion therebetween; anda substrate having a stratum of hydrophobic material positioned over the substrate at a level substantially proximate to a desired endpoint of the substrate, and a layer of hydrophilic material on the hydrophobic stratum, the hydrophobic stratum having a lower polishing rate against the hydrophobic planarizing surface than that of the hydrophilic layer.