Patent ID: 6524965
Filing Date: 2003-02-25
Classification: B08B,H01L

Abstract:
A cleaning method for a semiconductor manufacturing process to prevent metal corrosion, comprising:providing a wafer having a metal layer thereon, wherein the wafer is to be cleaned; placing the wafer into a first chemical cleaning equipment unit to clean a wafer surface with a first chemical cleaning solution while protecting the metal layer by cathodic protection wherein the wafer is immersed in a first chemical cleaning bath containing the first chemical cleaning solution which is electrically connected through a salt bridge to an isolation bath containing an electrolyte solution in which is immersed a sacrificial anode, the sacrificial anode in the isolation bath and the wafer in the first chemical cleaning bath being further electrically connected to a power source supply; and rinsing away the first chemical cleaning solution on the wafer; and drying the wafer.