Patent ID: 6579810
Filing Date: 2003-06-17
Classification: G03F,H01L

Abstract:
A method of removing a photoresist layer on a semiconductor wafer, the method comprising:providing a semiconductor wafer with a photoresist layer and polymers atop; performing a first cleaning process to remove polymers and organic components on a surface of the semiconductor wafer by spraying a first cleaning solution on the surface of the semiconductor wafer the first cleaning solution being either deionized water (DI water) containing ozone, or a solution of sulfuric acid (H2SO4) and hydrogen peroxide (H2O2); using a second cleaning solution to perform a second cleaning process to remove the residual first cleaning solution on the surface of the semiconductor wafer, the second cleaning solution being DI water; using a third cleaning solution to perform a third cleaning process to remove particles on the surface of the semiconductor wafer, the third cleaning solution being either a standard cleaning solution (SC-1), or a solution of ammonia (NH3) and hydrogen peroxide; using a fourth cleaning solution to perform a fourth cleaning process to remove a residual third cleaning solution employed in the third cleaning process, the fourth cleaning solution being DI water; and spin-drying the semiconductor wafer.