Patent ID: 7799200
Filing Date: 2010-09-21
Classification: B23H,C25F,H01L

Abstract:
1. A method of metal deposition comprising: (a) providing a work piece having a surface with recessed regions and exposed surface regions; (b) causing a deposition accelerator to become attached to said surface including said recessed and exposed surface regions; (c) selectively electrochemically removing said deposition accelerator from said exposed surface regions without performing substantial metal deposition on said surface by bringing said surface into close proximity with an electric field-imposing member such that the accelerator is selectively removed from the exposed surface regions in close proximity with said member and that accelerator more remote from said member in said recessed regions remains attached; and (d) after (c) is at least partially complete, depositing metal onto said surface, whereby said deposition accelerator remaining attached to the surface increases the rate of metal deposition in said recessed regions relative to the rate of metal plating in the exposed surface regions.