Patent ID: 6958247
Filing Date: 2005-10-25
Classification: H01L

Abstract:
1. A method of depositing a metal over a substrate including a dielectric layer having a patterned region and a substantially non-patterned region formed therein, the method comprising: exposing said substrate to an electrolyte bath so as to non-conformally deposit metal in a bottom-to-top technique in said patterned region; forming an excess metal layer over said patterned region and said substantially non-patterned region; controlling at least one process parameter during the formation of said excess metal layer to adjust a surface roughness of said excess metal layer; removing said excess metal layer by chemical mechanical polishing using an endpoint detection signal; exposing a second substrate that is substantially identical to said substrate to said electrolyte bath so as to non-conformally deposit metal in a bottom-to-top technique in said patterned region; forming an excess metal layer over said patterned region and a substantially non-patterned region of said second substrate; and based on said endpoint detection signal, controlling at least one process parameter during the formation of said excess metal layer of said second substrate to adjust a surface roughness of said excess metal layer of said second substrate.