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GOAL

* Applying uniform films onto silicon wafers by chemical vapor deposition (CVD).

* Ensuring uniform deposition of the chemical layer on the wafer.

SOLUTION

The Kaman SMU-9000 measuring system How does the system work? Before deposition begins, Kaman's sensors ensure that the plate holding the wafer is parallel to the showerheads that disperse the process gases. The sensors are used for calibration to verify that the plate's position is within limits. Kaman's system provides an analog output - or an optional digital interface - to signal out-of-tolerance conditions. If the plate is tilted, an actuator levels it. Result: Consistent and uniform deposition quality.

THE KAMAN ADVANTAGE

Why use the Kaman SMU-9000 measuring system?

* direct measurement. A sensor ring attached to a spring-loaded floating plate allows direct measurement of the position of the showerhead.

* noncontact. Using proven eddy current technology, each sensor can measure the position of the target without ever touching it.

* high resolution. The system can sense position change to one nanometer.

* system versatility. The system is available with a wide range of sensor options.