The ultrapure water is by definition extremely low in contamination .
Once it makes contact with the wafer surface it carries residual chemicals or particles from the surface that then end up in the industrial waste treatment system of the manufacturing facility .
The ultrapure water is by definition extremely low in contamination , but once it makes contact with the wafer surface it carries residual chemicals or particles from the surface that then end up in the industrial waste treatment system of the manufacturing facility .