Patent ID: 6448180
Filing Date: 2002-09-10
Classification: C23C,H01L

Abstract:
A method for depositing semiconductor films on a plurality of sets of semiconductor wafers, the method including the steps of:A. placing a first set of semiconductor wafers carried by a wafer boat within a reaction chamber; B. depositing an in-situ doped amorphous semiconductor film on said first set of semiconductor wafers while said first set of semiconductor wafers carried by said wafer boat is within said reaction chamber; C. removing said first set of semiconductor wafers carried by said wafer boat from said reaction chamber, and removing said first set of semiconductor wafers from said wafer boat; D. placing said wafer boat that is empty of any semiconductor wafers within said reaction chamber; E. depositing a first undoped semiconductor film having a thickness in a range of from about 8,000 Ã¥ (angstroms) to about 12,000 Ã¥ (angstroms) on said wafer boat and on components of said reaction chamber; F. removing said wafer boat from said reaction chamber, and loading a second set of semiconductor wafers within said wafer boat; G. placing said wafer boat having said second set of semiconductor wafers loaded therein within said reaction chamber; and H. depositing a second undoped semiconductor film on said second set of semiconductor wafers while said second set of semiconductor wafers carried by said wafer boat is within said reaction chamber.