The main features of a pre aligner:

1. Suitable for pre calibration of wafer position in semiconductor production equipment and testing equipment;

2. Non contact pre positioning wafer;

3. Compatible with SEMI standard 150-300mm wafers and transparent wafers (with no hollow center);

4. Compatible with SEMI standard Notch/Flat;

5. Compatible with transparent wafers (Type D);

6. Can locate the center and find the Mark (Flat Edge/Notch) logo;

7. Reading position: 6-12 inches can read the engraving number on the back, and below 6 inches, only the engraving number on the front can be read;

8. Currently, wafers with hollowed out centers are not supported;

9. SEMI S2 certification