Patent ID: 9034063
Filing Date: 2015-05-19
Classification: B24B,B24D

Abstract:
1. A method of manufacturing a polishing layer with a grooved polishing surface for use in a chemical mechanical polishing pad; wherein the method comprises: providing a polishing layer with an ungrooved polishing surface, wherein providing the polishing layer with an ungrooved polishing surface comprises: wherein the location of the nozzle opening resides within the doughnut hole region throughout the initial phase; wherein the location of the nozzle opening transitions from residing within the doughnut hole region to residing within the doughnut region during the transition phase; and, wherein the location of the nozzle opening resides within the doughnut region during the remainder phase; wherein r wherein r wherein the doughnut region is a toroid shaped region within the mold cavity that projects an annular cross section, D wherein R wherein r wherein r first machining at least one curved groove into the ungrooved polishing surface; and, then machining a plurality of linear grooves in an XY grid pattern into the polishing surface to produce the polishing layer with a grooved polishing surface;