Patent ID: 6851432

Claim:
A method for post-etch ash cleaning a semiconductor device having an organic, metal organic polymer, inorganic salt, oxide, hydroxide, and/or complexes or combinations thereof as a film or residue comprising the steps of: contacting said semiconductor device with a cleaning composition containing from about 4 to 14% by weight monoethanolamine, from about 0.2 to 6.0% by weight tetralkylammonium hydroxide, from about 0.3 to 3.5% by weight fluoride ion resulting from ionization of a salt of a non-metallic fluoride compound in said composition, 0.5 to 10% by weight of ascorbic acid corrosion inhibitor, balance water at a temperature of between 25° C. and 50° C. for a period of time between 5 minutes and 60 minutes; washing said semiconductor device in deionized water; and drying said semiconductor device.