Patent ID: 7070484
Filing Date: 2006-07-04
Classification: B24B

Abstract:
1. A polishing method for use in a chemical mechanical polishing (CMP) tool which uses an in-tool polishing pad and one or more supplied ceria (CeO2) based CMP slurries for in-tool chemical mechanical polishing of supplied workpieces, the method comprising: (a) roughening the in-tool polishing pad; (b) providing a batch of dummy workpieces within the CMP tool; (c) using one or more of the in-tool dummy workpieces in combination with a supplied one or more silica (SiO2) based CMP slurries to initialize the roughened polishing pad; (d) transferring a batch of non-dummy workpieces into the CMP tool; and (e) using the initialized polishing pad and one or more of the in-transferred non-dummy workpieces in combination with one or more ceria (CeO2) based CMP slurries to polish the one or more of the in-transferred non-dummy workpieces.