Patent ID: 7169019
Filing Date: 2007-01-30
Classification: B24B,H01L

Abstract:
1. A method of monitoring surface status and life of a pad by detecting temperature of a polishing interface during a chemical mechanical polishing (CMP) process, comprising steps of: (A) preparing and placing a brand-new pad together with an abrasive slurry under an artificially controlled environment for a plurality of CMP tests until termination of an operational life of said pad and then detecting temperature to conclude a relationship between the last stable temperature-rise at a polishing trace during the CMP process and surface roughness of said pad; and (B) conducting a polishing test of a subject pad under an artificially controlled environment to conclude a relationship between the last stable temperature-rise at a polishing trace during the CMP process and surface roughness of said subject pad; and (C) comparing said two relationships indicated in the steps (A) and (B) for analysis to monitor the surface status and life of said subject pad.