CHHOTRAI SOREN

Mr. Chhotrai Soren is currently pursuing his PhD degree from the Department of Materials Science and Engineering at IIT Delhi. His research utilizes the interdisciplinary knowledge of material engineering, electronic device fabrication, and device testing for neuromorphic applications. During his Ph.D. tenure, he optimized the growth of thin film oxides using the pulsed laser deposition method and gained expertise in the lithography and packaging of electronic devices. He is a Head Technical Assistant for Inductively Coupled Plasma Assisted Reactive Ion Etching (ICP-RIE) and Pulsed Laser Deposition (PLD) for oxides.

Previously, during his M.Tech., he worked on "Screen Printed Thick Film Sensor Electrodes for Electrochemical Sensing." His work involved studying the physical properties of the screen, with the variation in elastic property, mesh count, and open area of mesh affecting the final result of the device during fabrication. Also, physiochemical factors such as the viscosity of the medium, the thermal conductivity of the substrate, and the crystalline structure affect the performance of the fabricated device. His work also involved the packaging of sensor electrodes through die bonding and the study of solder joints formed over the electrode structures using lead-free solder paste (Sn99Ag0.3Cu0.7).

He did his B.Tech. project on "Direction of Arrival (DOA) Estimation using MUltiple SIgnal Classification (MUSIC), Capon, and Capon-like Methods." In this work, DOA estimation of multiple incident signals arriving from different directions. Parametric and non-parametric methods based on the uniform linear array are investigated, and the performance of MUSIC and Capon methods is compared. In addition, we optimized a new criterion for the Capon method to maintain the array gain in the look direction. The new Capon-like method improves the resolution accuracy of multi-array antenna systems compared to the Capon method.