Patent ID: 7578890

Claim:
A method of removal surface contaminants from silicon wafer surface comprising the following steps: (a) submerging the silicon wafer surface in an aqueous cleaning agent solution through which current is passed using a boron-doped diamond film as an electrode; then, removing the silicon wafer surface from the aqueous cleaning agent solution; (b) then, submerging the silicon wafer surface in the aqueous cleaning agent solution; subjecting the silicon wafer to ultrasound waves; and, optionally, heating the solution; then, removing the silicon wafer surface from the aqueous cleaning agent solution; (c) then, submerging the silicon wafer surface in an electrolyte solution through which current is passed using a boron-doped diamond film as an electrode; then, removing the silicon wafer surface from the electrolyte solution; (d) then, submerging the silicon wafer surface in water with ultrasound and heating; then, removing the silicon wafer surface from the water; (e) then, repeating step (d); and (f) then, spraying the silicon surface with water.