Patent ID: 8283485
Filing Date: 2012-10-09
Classification: C23C,H01L

Abstract:
1. A process for preparing a multi-layered substrate comprising a first layer and a second layer, the process comprising: providing the first layer comprising a ruthenium area and a copper area; and depositing the second layer comprising copper onto the first layer using at least one precursor having any one of the formula (Ib) to provide the wherein M is copper; wherein X is selected from oxygen and NR wherein R wherein R wherein L is a ligand selected from an alkylnitrile comprising from 2 to 20 carbon atoms; a silylnitrile having the formula (R wherein an organometallic bond between M and L is selected from 2 single bonds and 1 single bond; and wherein the depositing provides the second layer comprising: a first thickness ranging from about 20 Angstroms to about 2,000 Angstroms onto the ruthenium area and a second thickness onto the copper area that is at least 90% less than the first thickness, and wherein at least a portion of the depositing step is conducted in the presence of a reducing agent.