Patent ID: 6530381
Filing Date: 2003-03-11
Classification: C30B,H01L,Y10S

Abstract:
A process for the wet-chemical surface treatment of a semiconductor wafer following a mechanical surface treatment, by means of a sequence of treatment steps in which various agents act on a surface of the semiconductor wafer, comprising a following sequence of treatment steps in a given order (a) to (j):(a) holding a semiconductor wafer in an acid; (b) exposing the semiconductor wafer to ultrasound in an alkaline cleaning solution; (c) rinsing the semiconductor wafer with ultrapure water; (d) subjecting the semiconductor wafer to an alkaline etching treatment; (e) rinsing the semiconductor wafer with ultrapure water; (f) treating the semiconductor wafer in an alkaline cleaning solution selected from the group consisting of same alkaline cleaning solution of step (b) and a different alkaline cleaning solution from step (b); (g) subjecting the semiconductor wafer to a treatment which renders said wafer hydrophilic; (h) subjecting the semiconductor wafer to an acid etching treatment wherein the acid is selected from the group consisting of same acid of step (a) and a different acid from step (a); (i) rinsing the semiconductor wafer with ultrapure water; and (j) finally drying the semiconductor wafer and rendering hydrophilic said wafer.