Cleaning and liquid contact with solids – Processes – Including application of electrical radiant or wave energy...
Reexamination Certificate
2006-05-30
2006-05-30
Del Cotto, Gregory R. (Department: 1751)
Cleaning and liquid contact with solids
Processes
Including application of electrical radiant or wave energy...
C510S175000, C510S176000, C510S178000, C510S245000, C510S255000, C510S264000, C510S271000, C510S477000, C510S499000, C134S001300, C134S039000
Reexamination Certificate
active
07051742
ABSTRACT:
A composition for removing resists and etching residue from substrates containing at least one nucleophilic amine compound having oxidation and reduction potentials, at least one organic solvent, water and, optionally, a chelating agent is described. The chelating agent is preferred to be included since it provides added stability and activity to the cleaning composition so that the composition has long term effectiveness. If a chelating agent is not present, the composition, while providing for adequate stripping and cleaning upon initial use of the composition following mixing, has only short term stability. In this latter instance, the nucleophilic amine compound and organic solvent components of the composition preferably are maintained separate from each other until it is desired to use the composition. Thereafter, the components are combined. Following use of the composition, the non-used portion of the composition can be disposed of or be reactivated by the addition of a chelating agent.
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Lee Wai Mun
Pittman, Jr. Charles U.
Small Robert J.
Del Cotto Gregory R.
EKC Technology, Inc.
Morgan,Lewis & Bockius LLP
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