Overview

Rainbow 4400 is part of the Rainbow series of etch systems introduced in 1987. It addresses processes for wafer sizes up to 200mm and feature sizes as small as 0.35 micron. The Rainbow 4400 is designed for etching polysilicon films and incorporates unique features such as a patented wafer handling system, a proprietary source for generating stable plasma, and an overall product design that has received industry awards for quality and reliability. These features enable semiconductor manufacturers to reduce wafer particle contamination, improve etch selectivity and uniformity while maintaining profile control and process flexibility.