List of Contents
End Point Detector (EPD)
In-process end-point detectors are essential in chemical mechanical planarization (CMP) processes, actively monitoring the procedure in real-time. They specifically utilize variations in light emission, such as intensity or spectrum changes, to accurately signal the completion of the polishing layer.
This precise end-point detection is critical for ensuring that just the right amount of material is removed, achieving the target surface finish without the risk of over-polishing. By analyzing the detected signals, operators can fine-tune the pressure, speed, and slurry composition used in the process, tailoring them to achieve optimal removal rates and surface quality.
Moreover, the system can help predict when the CMP equipment, such as the polishing pad or slurry, may require maintenance or replacement.