发明授权
US09287228B2 Method for etching semiconductor structures and etching composition for use in such a method 有权
蚀刻用于这种方法的半导体结构和蚀刻组合物的方法

Method for etching semiconductor structures and etching composition for use in such a method
摘要:
A method of etching a semiconductor structure, comprises contacting an under bump metallization (UBM) with an etching composition. The UBM includes an underlying layer comprising titanium and an overlying layer comprising a second metal. The etching composition is a liquid comprising at least 0.1 wt % hydrofluoric acid and at least 0.1 wt % phosphoric acid.
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