The SSEC model 3300ML single wafer spray acid cleaning system supports RCA process in the NanoFab cleanroom. This system mixes, heats and delivers chemicals on demand and provides better wafer cleaning capability by eliminating cross contamination between wafers. In addition, the automated single wafer cleaning process prevent users from exposure to chemicals. This system can accommodate substrates ranging from 75 mm diameter to 200 mm diameter and irregular wafer pieces.