c) ESC Heater (Level 1 – Level 4)
- Visual inspection of ALN Plate
- Checking of dimension, electrical, chucking force and voltage, adhesive and helium leak.
- Removal of metal residue, bellow change, roughness and flatness control, cleaning and baking, dimple regeneration.
- Out-going inspection: Wafer chucking force, ultrasonic and temperature.