Patent ID: 7422700
Filing Date: 2008-09-09
Classification: C25F,H01L

Abstract:
1. An electrochemical planarization composition for removing barrier layer material from a work piece during an electrochemical mechanical polishing process while protecting a metallization layer of the work piece, the electrochemical planarization composition comprising: at least one complexing agent capable of complexing with the barrier layer material when exposed to a pH outside of a pH range of greater than about pH 2 and less than about pH 10, the complexing agent comprising a non-oxidizing agent selected from the group consisting of 1,3-dihydroxy-4-(2-pyridylazo) benzene, benzoic acid, 2,3,4-trihydroxybenzenesulfonic acid, and 2,6-dibromo-3,4,5-trihydroxybenzoic acid; a corrosion inhibitor; abrasive particles; and a pH adjuster.