The present invention is a method of use of a novel cleaning solution in a
single wafer cleaning process. According to the present invention the
method involves using a cleaning solution in a single wafer mode and the
cleaning solution comprises at least ammonium hydroxide (NH.sub.4OH),
hydrogen peroxide (H.sub.2O.sub.2), water (H.sub.2O) and a chelating
agent. In an embodiment of the present invention the cleaning solution
also contains a surfactant. Moreover, the present invention also teaches
a method of combining an ammonia hydroxide, hydrogen peroxide, and
chelating agent step with a short HF step in a fashion that minimizes
process time in a way that the entire method removes aluminum and iron
contamination efficiently without etching too much oxide.The single wafer
cleaning processes may also be used to increase the yield of high-grade
reclaimed wafers.