Wafer Handling with Flip Station

The flip station is a new component in our MicroProf® with EFEM handling equipment and can rotate a wafer by 180 degrees so that the bottom side of the wafer then faces upwards. This allows fully automatic measurement of both the top and bottom of a wafer within one handling process.

The rotation of the wafer is relevant for the determination of the wafer bow according to SEMI standard MF 1390. This standard provides for bow measurements both in the original and in the rotated state of the wafer in order to take into account or compensate for the curvature of the wafer (bow) due to its own weight.

FRT Metrology - Wafer Handling with Flip Station
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