| 摘要 |
Embodiments of a method of barrier layer surface treatment to enable direct copper plating without copper seed layer. In one embodiment, a method of plating copper on a substrate with a group VIII metal layer on top comprises pre-treating the substrate surface by removing a group VIII metal surface oxide layer and/or surface contaminants and plating copper on the pre-treated group VIII metal surface. Pre-treating the substrate can be accomplished by annealing the substrate in an environment with a hydrogen-containing gas environment and/or a non-reactive gas(es) to Ru, by a cathodic treatment in an acid-containing bath, or by immersing the substrate in an acid-containing bath
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