Patent ID: 7238239

Claim:
A system for using a fluid composition to form a coating of a desired thickness on a surface of a workpiece, comprising: (a) a processing chamber; (b) a coating enclosure inside the processing chamber, wherein the workpiece is rotatably supported inside the coating enclosure during coating operations; (c) a dispenser for delivering a predetermined amount of the fluid composition to the surface of the workpiece; (d) a pressure sensor positioned outside the coating enclosure; (e) a pressure communicative fluid conduit operatively coupling the pressure sensor to the interior of the coating enclosure such that a pressure signal generated by the pressure sensor, at a time during which the workpiece is being rotated, is indicative of barometric pressure inside the coating enclosure; (f) a control system operatively coupled to the pressure sensor and configured to control at least one coating thickness parameter via an output control signal, wherein the control system comprises componentry enabling the control system to derive the output control signal from information comprising the generated pressure signal.