Patent ID: 6729945
Filing Date: 2004-05-04
Classification: B24B

Abstract:
A platen for use in chemical mechanical planarization (CMP) systems, the platen arranged below a linear polishing pad and designed to apply a controlled fluid flow to the underside of the linear polishing pad, the platen comprising:a leading zone containing a first plurality of output holes, the leading zone oriented more proximate to an upstream region of the linear polishing pad; a center region containing a third plurality of output holes; and a trailing zone containing a second plurality of output holes; the trailing zone oriented more proximate to a downstream region of the linear polishing pad, the leading zone and the trailing zone and the center region being independently controlled and designed to output the controlled fluid flow independently from each of the first plurality of output holes and the second plurality of output holes and the third plurality of output holes, each of the leading zone and the trailing zone has a first sub region, a second sub region, and a third sub region; wherein the first sub region includes a first radial row of output holes, the second region includes a second radial row output holes, and the third sub region includes a third radial row, a fourth radial row, and a fifth radial row of output holes.