| 主权项 |
1. A method of filling a via in an electronic device with copper comprising: providing an acidic copper electroplating bath comprising a source of copper ions, an acid electrolyte, a source of halide ions, an accelerator, a leveler, and a suppressor, wherein the copper electroplating bath has a dynamic surface tension of ≦40 mN/m; providing as a cathode an electronic device substrate having one or more vias to be filled with copper and having a conductive surface; contacting the electronic device substrate with the copper electroplating bath; and applying a potential for a period of time sufficient to fill the vias with a copper deposit; wherein the copper deposit in the vias is substantially void-free and substantially free of surface defects. |
