Electroplating apparatus including a real-time feedback system
An electro-chemical plating system includes an upper rotor assembly for receiving and holding a wafer; an electroplating reactor vessel for containing plating solution in which the wafer is immersed; an anode array including a plurality of concentric anode segments provided inside the electroplating reactor vessel; a power supply system including power supply subunits for controlling electrical potentials of the anode segments, respectively; and a plurality of sensor devices mounted inside the upper rotor assembly, wherein the sensor devices are substantially arranged in corresponding to the anode segments, and during operation, the plurality of sensor devices are utilized for in-situ feeding back a deposition profile to a control unit in real time.
1. An electro-chemical plating system comprising:
an upper rotor assembly for receiving and holding a wafer;
an electroplating reactor vessel for containing plating solution in which the wafer is immersed;
an anode array including a plurality of anode segments provided inside the electroplating reactor vessel;
a power supply system including power supply subunits for controlling electrical potentials of the anode segments, respectively; and
a plurality of sensor devices mounted inside the upper rotor assembly, wherein the sensor devices are substantially arranged in corresponding to the anode segments, and during operation, the plurality of sensor devices are utilized for in-situ feeding back a deposition profile to a control unit in real time.
2. The electroplating apparatus according to claim 1 wherein the sensor devices are eddy current sensors.
3. The electroplating apparatus according to claim 1 wherein the control unit receives the real-time deposition profile detected by the sensor devices, and alters power output of individual power supply subunits of the power supply system.
4. The electroplating apparatus according to claim 1 wherein the wafer is electrically connected to the power supply system such that the wafer serves as a cathode electrode during electroplating.
5. The electroplating apparatus according to claim 1 wherein the plurality of anode segments are concentrically arranged inside the electroplating reactor vessel.