Patent ID: 6478943
Filing Date: 2002-11-12
Classification: C25D

Abstract:
A method of electrochemically depositing a textured surface comprised of peaks on an electrically conductive substrate comprising the steps of(a) preparing an electrodeposition bath containing metal ions, (b) immersing the substrate in the bath, (c) passing a charge having a first current density greater than about 1,500 mA/cm2 through the bath to the substrate and maintaining said first current density for a first time interval, (d) reducing the charge to a second current density and maintaining said second current density for a second time interval, and (e) repeating steps (c) and (d) for a total deposition time and then removing the substrate from the bath, wherein the ratio of the first time interval to the second time interval is greater than 1, the first current density is greater than the second current density, the second current density is greater than zero and the electrodeposition bath is maintained at a temperature within the operating range of the electrodeposition bath.