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Workpiece processing using ozone gas and chelating agents
Workpiece processing using ozone gas and chelating agents
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机译:使用臭氧气体和螯合剂的工件加工
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摘要
In systems and methods for cleaning a wafer having an oxide on a surface of the wafer, an aqueous liquid including a chelating agent is applied onto the wafer, while the wafer is also contacted by ozone gas. The ozone readily oxidizes the contaminants in the presence of the aqueous liquid. The chelating agent helps to remove metal contamination from the wafer, without the need for an acid such as hydrofluoric or hydrochloric acid. Etching of the oxide layer is accordingly reduced. The wafer can be effectively cleaned using aqueous liquid and ozone, while largely preserving the oxide layer needed for certain types of micro-scale devices formed on the wafer.
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