Patent ID: 6177350
Filing Date: 2001-01-23
Classification: C23C,H01L

Abstract:
A method for forming a multi-layered aluminum-comprising structure on a substrate having a patterned dielectric surface, wherein the improvement comprises:(a) sputter etching said patterned dielectic surface;(b) depositing at least one continuous wetting layer of titanium over said patterned dielectic surface using an ionized sputter- deposited mission, wherein said wetting layer has a thickness within the range of about 25 .ANG. to about 200 .ANG. on a sidewall of a feature formed in said substrate; and(c) depositing a layer of aluminum over said titanium we layer using a sputter deposition technique where a target is sputtered and material sputtered from said target passes between said target and said substrate to form a film layer on said substrate, with no secondary means used to further ionize said sputtered material prior to said sputtered material reaching said substrate, wherein said sputtering is carried out at a substantially constant substrate temperature which is selected to be within the range of about 380.degree. C. to about 500.degree. C., n wherein the deposition rate of said aluminum layer is increased as the deposition progresses.