Patent ID: 6634930
Filing Date: 2003-10-21
Classification: B24B

Abstract:
A method for preventing metal corrosion on a wafer during a chemical mechanical polishing (CMP) process when the process is temporarily halted comprising the steps of:providing a wafer having a metal layer on a top surface to be polished by a polishing pad and a slurry solution, said metal layer being susceptible to corrosion when exposed to said slurry solution in a stationary manner, mounting said wafer in a CMP apparatus with said metal layer on said wafer exposed, polishing said metal layer on said wafer by rotating against a polishing pad with a slurry solution thereinbetween stopping said polishing process by the occurrence of a condition, and spraying a cleaning solvent toward said wafer surface and removing substantially all slurry solution from said wafer surface to prevent corrosion of said metal layer by the slurry solution.