Methods for depositing a metal into a micro-recessed structure in the
surface of a microelectronic workpiece are disclosed. The methods are
suitable for use in connection with additive free as well as additive
containing electroplating solutions. In accordance with one embodiment,
the method includes making contact between the surface of the
microelectronic workpiece and an electroplating solution in an
electroplating cell that includes a cathode formed by the surface of the
microelectronic workpiece and an anode disposed in electrical contact
with the electroplating solution. Next, an initial film of the metal is
deposited into the micro-recessed structure using at least a first
electroplating waveform having a first current density. The first current
density of the first electroplating waveform is provided to enhance the
deposition of the metal at a bottom of the micro-recessed structure.
After this initial plating, deposition of the metal is continued using at
least a second electroplating waveform having a second current density.
The second current density of the second electroplating waveform is
provided to assist in reducing the time required to substantially
complete filling of the micro-recessed structure.