Samrat Sur

• Collaborate with internal stakeholders to define technical requirements and work with external suppliers to identify material solutions- wafercoat materials and Liquid Photoresist material • Identify and coordinate engineering samples for product testing to meet product and process quality targets. • Work with suppliers to define requirements and holds suppliers accountable for their manufacturing process flow to meet quality, reliability, cost, yield and manufacturability requirements

• Involved in overseeing reliability testing and analysis through product lifecycle for Foveros Technology/HBI - Wafer level assembly and Die Prep. • Successfully collaborated with multiple teams across organization -Module engineers/Failure analysis lab/Supplier/Materials team/Metrology team to drive for process fixes/Screening/Containment to improve the quality and reliability performance of the products. • Developed sampling plans, control methodology, reliability test to identify key issues and improve yield and reliability of products. • Conducted thorough QFMEA/Risk assessment and proactively resolved issues to prevent negative impact on customers. • Delivered high quality and reliable assessment to certify fabs, processes, tools resulting in successful and excursion-free ramp manufacturing. • Established process of accountability, methodology, data review, performance against schedule metrics during transfer of products to factories. • Led virtual cross-functional international teams efforts to address manufacturing issues to deliver new products and processes for high volume manufacturing.

• Capable with setting up and executing design of experiments (DOEs) for identifying defect root cause for process yield issues and new process development. • Experienced in using SPC principles, statistical tools, and control charts for identifying and troubleshooting tool mismatch issues, meet process target specifications and reduce in-line variability/defect density. • Proficient in using and setting up factory automation techniques for efficient process sustenance. • Established best known methods for excursion protection and new tool installs/qualification across the module. • Proven tool ownership abilities to sustain and develop process in a 24x7 challenging environment. • Led multiple new tool qualification in order to enhance factory capacity by ~150%.

• Designed and fabricated macro scale Marangoni swimmer of various shapes and size to investigate effect of confinement, propulsion agent and interface curvature on the mode of motion of the swimmer. • Designed an experimental setup and performed parametric study to investigate the effect of propulsion agent and interface curvature on multiple particle interaction of Marangoni swimmers. • Currently working on the understanding the effect of confinement on Marangoni swimmers and how vortex instability affects the motion. • Designed and fabricated a high temperature Capillary Breakup Extensional Rheometer (CaBER). • Investigated the dripping behavior of various polycarbonates of different molecular architecture and polycarbonates with flame retardant salts through extensional rheology. - Investigated the effect of time and temperature on the dripping behavior by monitoring the onset of crosslinking which has never been done before in the literature. • Developed a correlation between the evolution of extensional viscosity and temperature to predict the no of drips and the UL94 ratings. (Patent Pending) • Designed a Dripping onto substrate Capillary Breakup Extensional Rheomety experimental setup (DoS-CaBER) to characterize the extensional rheology of dilute polymer solutions where images were captured using a high speed camera at 40,000 fps. •Performed a parametric study to investigate the effect of varying polymer molecular weight, polymer concentration and solvent viscosity on the relaxation time and extensional viscosity. • Performed a parametric study on the effect of different binders at varying concentrations on the dynamics of jet formation and break-up of commercial ink-jet inks. • Performed jetting experiments on commercially available inks to investigate the dripping and breakup properties.

• Characterized various grades of polymers through shear rheology using ARES-G2 Rheometer. • Performed extensional viscosity measurements using the Universal Extensional Viscosity Fixture (EVF) to characterize the amount of branching in polymers and investigate the strain hardening effects. • Performed a fundamental study on the effect of branching and flame retardant on Flame Smoke and Toxicity polymers (FST). - Effect of the change in entanglement density and free volume on the properties of the FST polymer. • Performed High Temperature Capillary breakup Extensional Rheometry on various Polycarbonates mixed with flame retardant salts to find the optimum level of the salts in order to achieve UL-94 V0 ratings. • Developed test cases using the ARES G2 rheometer to characterize various thermosets (Chemo-Rheology). - Investigated the effect of time and temperature on the onset of curing using shear rheology by observing the variation in the storage modulus (G’). - Performed Differential Scanning Calorimetry to understand the variation in the glass transition temperature of various thermosets polymers and correlate it to the curing percentage and curing time. • Published a paper on our findings of flame retardant polycarbonates resisn in ANTEC 2018 conference and was awarded the best paper for Applied Rheology Division

• Responsible for conducting and demonstrating experiments in the department of Physics for Freshmen and junior students. • Responsible for conducting review sessions to help the students with better understanding of Physics. • Responsible for grading and correcting lab reports and assignment.

1.Designed and automated an “end of line" test set up for testing of pneumatic fasteners. 2.Used LABVIEW to design the user interface and created the Data Acquisition model. Proficient in using DAQmx. 3.Control panel design and wiring of electrical circuit 4.Designed the circuit layout for the Electrical box and successfully integrated the sensors (pressure and torque sensors, strain gauge, actuation valves) with the mechanical setup. Measurements were taken from the sensors using NI (National Instrument) DAQ board 5.Successfully completed the project in the given time period of 6 months and helped establish the automated test setup in production line to increase the efficiency of the testing process

Non Newtonian Fluid Dynamics Lab

Mechatronics, Fluids and Wind Power Engineering