Zhanxiang Zhao
Etch Solutions Manager
Oxford Instruments
Dr. Zhanxiang Zhao is an Etch Solutions Manager at Oxford Instruments. She focuses on plasma etching process development for a wide variety of etching processes, such as III-V compound semiconductor materials, dielectric, metal, metal oxide, atomic layer etching etc. She and her team provide process solutions in applications, such as datacom/telecom, RF/power, quantum and more. She has a PhD in materials engineering from University of Leeds.
Presentations
Advanced Volume Manufacturing InP Etching on 150 mm Wafers Using High Temperature and Reliability Electrostatic Chuck
Thanks to advances in InP substrate and epitaxial growth technology, 150 mm InP wafers have become commercially available in recent years. Scaling to the 150 mm wafer size is one of the most effective approaches to reducing the cost of InP photonic devices. In this paper, we demonstrate our newly developed InP etching results on 150 mm wafers using the PlasmaPro100 Cobra300 system equipped with a hot electrostatic clamping (ESC) system. After process development, we achieved a vertical profile with an etch rate exceeding 500 nm/min and a uniformity better than ±3%. Importantly, the sidewall and bottom surfaces-both critical for photonic devices-are very smooth.