Patent ID: 6235635
Filing Date: 2001-05-22
Classification: B24B,B24D

Abstract:
A method for chemical mechanical planarization of a semiconductor wafers, comprising:providing a platform for mounting semiconductor wafers;providing a means for rotating said platform for mounting semiconductor wafers;providing a cylindrical platform for mounting semiconductor polishing pads;providing a means for rotating said cylindrical platform;providing a cylindrical polishing pad arrangement;providing a polishing pad conditioner arrangement;providing a means for rotating said cylindrical polishing pad;providing a means for varying pressure by which the cylindrical polishing pads are urged toward the semiconductor wafers;providing a means for varying pressure by which the pad conditioner disks are urged toward the polishing pads;providing a means for evenly distributing slurry within said cylindrical platform by providing a set of openings or channels provided within said cylindrical platform combined with slurry ports that match and are connected to said openings or channels and that exit to and are connected with the outside surface of said cylindrical platform and by further providing a means of entering said slurry into said cylindrical platform consisting of slurry pumped into said channels of said cylindrical platform by means of a rotary pump, said means for evenly distributing slurry within said cylindrical platform being a component of an apparatus for said chemical mechanical planarization; andplanarizing said semiconductor wafer by chemical mechanical planarization.