Patent ID: 6143618
Filing Date: 2000-11-07
Classification: H01L

Abstract:
A method for depositing a silicon oxide dielectric layer on a polycide layer comprising:(a) providing a substrate having a polycide layer;(b) loading said substrate into a CVD reactor at a first temperature;(c) evacuating said CVD reactor;(d) ramping said substrate to a second temperature;(e) introducing a first gas flow into said CVD reactor;(f) ramping said substrate to a third temperature;(g) maintaining said substrate at said third temperature and said first gas flow for a time period;(h) ramping said substrate to a fourth temperature, said fourth temperature being less than said third temperature;(i) purging said reactor with a gas flow containing N.sub.2 and N.sub.2 O;(j) introducing a third gas flow containing dichlorosilane and N.sub.2 O into said CVD reactor, whereby a silicon oxide dielectric layer is deposited on said substrate at said fourth temperature;(k) introducing a fourth gas flow in said reactor;(l) ramping said substrate to said first temperature; and(m) unloading said substrate.