Patent ID: 8622020

Claim:
An electroless plating system, comprising: a first vacuum chuck for supporting a first wafer; a first drive mechanism for moving the first vacuum chuck; a second vacuum chuck for supporting a second wafer, the second vacuum chuck being disposed above the first vacuum chuck; a second drive mechanism coupled to the second vacuum chuck for moving the second chuck vertically and for inverting the second wafer to an inverted position where a top surface of the second wafer is opposed a top surface of the first wafer; and a fluid delivery system configured to deliver a plating solution to the top surface of the first wafer, wherein the second drive mechanism is configured to bring the top surface of the second wafer in the inverted position proximate to the top surface of the first wafer, without contacting the top surface of the first wafer, to form a gap between the first wafer and the second wafer so that the plating solution is configured to fill the gap and to contact both top surfaces to induce an electroless plating reaction on both top surfaces, and wherein the second drive mechanism is configured to move the second wafer away from the first wafer after the electroless plating reaction.