Patent ID: 8524512
Filing Date: 2013-09-03
Classification: C23C,H01L

Abstract:
1. A method for repairing a surface of a substrate, said substrate being coated with a discontinuous copper diffusion barrier layer of a titanium-based material defining said surface to be repaired, which comprises: a) contacting said surface with a suspension containing copper or copper alloy nanoparticles for a time of between 1 s and 15 min, thus causing the nanoparticles to be selectively adsorbed onto the surface of the barrier layer; and b) contacting the thus treated surface with a liquid solution having a pH of between 8.5 and 12 and comprising: at least one metal salt, at least one reducing agent, and at least one stabilizer at a temperature of between 50° C. and 90° C., for a time of between 30 s and 10 min, in order to thus form a metallic film having a thickness of at least 50 nanometers re-establishing the continuity of the copper diffusion barrier layer.