Patent ID: 6340395
Filing Date: 2002-01-22
Classification: G03F,H01L,Y10S

Abstract:
A process for cleaning the surface of a silicon wafer consisting of the sequential steps of:(a) providing a silicon wafer having a surface; (b)(i) exposing said silicon wafer surface to a Sulfuric Peroxide Mixture (SPM) having a first chemical composition, then immediately thereafter and without any intervening drying step, (ii) rinsing said SPM from said silicon wafer surface with De-Ionized (DI) water; said steps (b)(i) and (b)(ii) being performed at least one time; then immediately thereafter and without any intervening drying step, (c)(i) exposing said silicon wafer surface to an Ammonium Peroxide Mixture (APM) having a second chemical composition, then immediately thereafter and without any intervening drying step, (ii) rinsing said APM from said silicon wafer surface with DI water; (d) repeating steps (b)-(c) at least one time; and (e) drying said silicon wafer surface.