Patent ID: 7465661

Claim:
A method of electroplating a metal into a plurality of channels within an insulating material having a first face and a second face separated from the first face by a distance D, the plurality of channels extending from the first face to the second face, said method comprising: mounting the material to a cathode; placing the cathode into an electroplating solution containing the metal; placing an anode into the electroplating solution; connecting the cathode and the anode to a power supply; controlling operation of the power supply to provide a beginning current density during deposition at the insulating material and initiating electroplating of the metal within the plurality of channels starting at the second face; and controlling operation of the power supply to provide a final current density during deposition at the insulating material and ending electroplating of the metal within the plurality of channels at the first face, wherein the final current density is larger than the beginning current density, and wherein the beginning current density is maintained at a level for a sufficient time to substantially prevent bubble formation during the electroplating.