Patent ID: 7824146

Claim:
A method comprising: providing a semiconductor fabrication tool comprising a stage heater having a plurality of wafer lifts, a baffle surrounding the stage heater and having a plurality of ring lifts, and an arm lift having a plurality of wafer lift pins and a plurality of ring lift pins, the plurality of ring lift pins being aligned with the plurality of ring lifts and the plurality of wafer lift pins being aligned with the plurality of wafer lifts; moving the arm lift upward to cause the plurality of ring lift pins to raise the plurality of ring lifts and to cause the plurality of wafer lift pins to raise the plurality of wafer lifts; placing an adapter ring on the plurality of ring lifts via a robotic arm; placing a first semiconductor wafer having a first diameter on the plurality of wafer lifts via the robotic arm; moving the arm lift downward to lower the plurality of wafer lifts and the plurality of ring lifts, thus resting the first semiconductor wafer and adapter ring on a surface of the stage heater, the adapter ring covering a portion of the stage heater, removing the first semiconductor wafer from the plurality of wafer lifts via the robotic arm; removing the adapter ring from the plurality of ring lifts via the robotic arm; placing a second semiconductor wafer on the plurality of wafer lifts via the robotic arm, the second semiconductor wafer having a second diameter greater than the first diameter; and moving the arm lift downward to place the second semiconductor wafer on the surface of the stage heater.