Patent ID: 6946393

Claim:
A method of fabricating an interconnect supported by a semiconductor structure in a chemical vapor deposition reaction chamber, comprising: flowing a first titanium-containing precursor in the chemical vapor deposition reaction chamber; flowing nitrogen in the chemical vapor deposition reaction chamber simultaneously with flowing the titanium-containing precursor to form a first layer of titanium nitride on the semiconductor structure; flowing a second titanium-containing precursor in the chemical vapor deposition reaction chamber; flowing at least one gas selected from the group consisting of ammonia and nitrogen trifluoride in the chemical vapor deposition reaction chamber simultaneously with the step of flowing the second titanium-containing precursor to form a second layer of titanium nitride on the first layer of titanium nitride wherein the second layer of titanium nitride comprises a polycrystalline orientation that comprises a mixture of 1:1 of <111> and <200> oriented grains; and flowing an aluminum-containing precursor in the chemical vapor deposition reaction chamber to form an aluminum film of small grain size on the second layer of titanium nitride.