Patent ID: 6402884
Filing Date: 2002-06-11
Classification: B24B,H01L

Abstract:
A planarizing apparatus for planarization of microelectronic-device substrate assemblies, comprising:a table for carrying a polishing pad; a carrier assembly having a carrier head configured to hold a substrate assembly, the carrier head being movable to press the substrate assembly against the polishing pad, and at least one of the carrier head or the table being translatable with respect to the other to translate the substrate assembly across the polishing pad; a slurry delivery system including a first feed line for containing a flow of a first planarizing solution including a first liquid mixture and a first plurality of abrasive particles in the first liquid mixture, a second feed line for containing a flow of a second planarizing solution including a second liquid mixture and a second plurality of abrasive particles in the second liquid mixture, the first abrasive particles having a first planarizing attribute defined at least in part by a first particle size distribution and the second abrasive particles having a second planarizing attribute different than the first attribute of the first abrasive particles, the second planarizing attribute being defined at least in part by a second particle distribution; a valve coupled to the first and second feed lines to switch between the passing the first solution or the second solution through the valve; and a slurry dispenser coupled to the valve to dispense the one of the first solution or the second solution passing through the valve to the planarizing pad.