Patent ID: 6645860
Filing Date: 2003-11-11
Classification: H01L

Abstract:
In integrated circuit fabrication, a method of applying copper to copper-receiving surfaces of a substrate, the method comprising the following steps:a) positioning the substrate in a chemical vapor deposition (CVD) chamber; and b) depositing copper on the substrate by the steps of: i) depositing a first adhering conforming layer of copper by means of CVD on each copper-receiving surface using a first copper organic compound precursor to form a first layer of copper contacting the copper receiving surface, the first copper organic compound precursor being (hfac)Cu(1,5-dimethylcyclooctadiene), whereby said first layer of copper provides a copper layer to which subsequently-deposited copper will adhere, the copper-receiving surface comprising a diffusion barrier material; and ii) depositing a second layer of copper on said first layer by means of CVD using a second copper organic compound precursor different than (hfac)Cu(1,5-dimethylcyclooctadiene) wherein steps i) and ii) are successively carried out without intervening processing of said first layer of copper.