The clip is not placed in the anti-overflow tray, which will cause the clip to be stained with the color of the pen and ink, which will indirectly affect the contamination of the wafer.
If the clip is not placed on the anti overflow disk, it will cause the clip to be contaminated with the ink color, which will indirectly affect the chip pollution
If the clip is not placed on the overflow prevention tray, the clip will be stained with ink color, which will indirectly affect the wafer contamination.