Fsi International, Inc.

Keith H Armstrong

Kevin G Kemp

Natarajan Ramanan

Faqiu (Frank) Liang

A rotary peristaltic pump that can supply fluids accurately at desired flow rates and with the desired control over pulsations normally experienced when using peristaltic pumps. The control is provided, in one aspect, by varying the radius of the shell against which the compression devices act to deform the tubing. In another aspect, the torque needed to turn the rotor is equalized throughout the rotation of the rotor to further enhance the flow rate accuracy of the pump. Torque equalization is preferably enhanced by use of a torque control cam positioned about the rotor.

Peristaltic pump with flow control

Systems and methods that make it possible to rapidly cycle a workpiece through a temperature/time profile over a wide temperature range, e.g., 0.degree. C. to 350.degree. C., without having to lift and transfer the workpiece between separate baking and chilling mechanisms. The present invention is based in part upon the concept of using a low thermal mass, thermally conductive heating member to support a workpiece, such as a microelectronic device, during both baking and chilling operations. While supporting the workpiece on one surface, the other surface of the heating member can be brought into and out of thermal contact with a relatively thermally massive chill plate to easily switch between baking and chilling operations. A simple mechanism is all that is required to either physically separate the heating member and chill plate to accomplish the most rapid heating, or the simple mechanism adjoins the heating member and chill plate to accomplish the most rapid chilling. This approach completely eliminates the need to rely upon a workpiece handling mechanism in order to lift and transfer a microelectronic device from a heating member to a separate chill plate. This approach also allows both chilling and baking to occur from a direction below the microelectronic device.

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Sherman, TX, United States of America

Keith H Armstrong