Patent ID: 6221712
Filing Date: 2001-04-24
Classification: C23C,H01L

Abstract:
A method for fabricating a gate structure, the method comprising:providing a substrate;performing a nitridation process to nitridate a portion of the substrate to form a nitride region;performing an organic metal chemical vapor deposition (OMCVD), with a Tantalum (Ta)-based organic compound and a Titanium (Ti)-based organic compound serving as precursors, to form a Ta.sub.2-x Ti.sub.x O.sub.5 dielectric layer, which is used as a gate oxide layer, which covers the nitride region;forming a barrier layer on the Ta.sub.2-x Ti.sub.x O.sub.5 dielectric layer;forming a conducting layer on the barrier layer;forming an anti-reflection layer on the conducting layer; andpatterning the anti-reflection layer, the conducting layer, the barrier layer, and the Ta.sub.2-x Ti.sub.x O.sub.5 dielectric layer, so that a gate structure is formed on the nitride region.