Patent ID: 6271140
Filing Date: 2001-08-07
Classification: B24B

Abstract:
A method for simultaneously polishing a plurality of substrates using coaxial polishing-dressing devices, said method comprising the steps of:providing a rotatable platen having a top surface with a polishing pad mounted thereon;preparing said polishing pad with a polishing compound;providing a plurality of coaxial polishing-dressing head devices, each attached to a common rotatable support spindle said coaxial polishing-dressing head devices having a lower surface opposed to an upper surface of the polishing pad on said polishing platen, said coaxial polishing-dressing head devices having a recessed nesting means f releasably holding a substrate to be polished, said nesting means including an elastomeric surface said nesting means rotating along a central axis thereof;said polishing-dressing head devices providing plurality of annular dressing rings for dressing said polishing pad area, said annular dressing rings are positioned coaxially encircling each nested substrate;providing a controlled means to said rotatable support spindle for applying a process established polishing and dressing pressure to said coaxial polishing-dressing head devices, whereby the substrate and dressing ring on the lower surface of said coaxial polishing-dressing head devices are rotatable pressed against the upper surface of the polishing pad.