Overview

The Candela CS20 system measures surface reflectivity and topography for automatic defect detection and classification. It uses scatterometry, ellipsometry, reflectometry, and topographical analysis to inspect wafer surfaces for defects and film thickness uniformity. It is designed for inspection of transparent materials such as sapphire and GaN and can detect a wide variety of defects. It is suitable for use in the production of High Brightness Light Emitting Diodes (HBLEDs), High-Power RF Devices, and Coated Glass (CMOS imagers, LCoS chips, etc.).