Patent ID: 6211055
Filing Date: 2001-04-03
Classification: H01L,Y10S

Abstract:
A method for making conductive channel in a semiconductor wafer, comprising the steps of:(a) forming a through hole in a dielectric layer, which is formed above a conductive substrate;(b) subjecting said wafer to a first wet washing process which involves the use of an oxidizer that may form a native oxide layer on said conductive substrate;(c) subjecting said wafer to a first drying process;(d) subjecting said wafer to a second wet washing process to remove said native oxide layer formed on said conductive substrate;(e) subjecting said wafer to a second drying process; and(f) filling said through hole with a conductive material to form a conductive channel;(g) wherein said first wet washing process, said first drying process, said second wet washing process, and said second drying process are all conducted in a same wet washing station and in a continuous manner.