Manager

• Nov 2022 - Present

Dr. Han is a Manager with Exponent, Inc in the Electrical Engineering and Computer Science practice. She assists clients in electronic systems failure analysis, especially the ones experienced thermal incidents. She has led projects on electronic system design review, manufacturing quality assessment, safety evaluation, and failure analysis and recreation for a broad range of products including battery management systems, medical devices, power systems, wireless chargers, and consumer electronics. Dr. Han additionally has experience advising clients in matters pertaining to machine learning and data analytics for consumer products, retail industry, and medical device applications. She is experienced in data acquisition via various systems including high speed video camera, optical profilometer, and light detection and ranging (LiDAR) sensor. She employs design of experiments (DOE) to collect representative and comprehensive datasets with minimal bias. She interprets the visual world and predicts future behavior via color space theory, image analysis of 2D and 3D data, deep learning, regression, and signal processing. Dr. Han has led projects involving from the design of imaging systems, data acquisition, software-hardware integration, to image processing algorithms development and data interpretation. Show less

Managing Engineer

• Mar 2021 - Nov 2022

Senior Engineer

• Mar 2019 - Mar 2021

Engineer

• Oct 2017 - Mar 2019

Process Control Engineer

• May 2016 - Oct 2017

• Designed feedforward controller. Managed manufacturing database and integrated process knowledge and control theory to build the controller and improve the product yield. Saved substantial amount of manual work • Coordinated and collaborated with multifunctional teams to troubleshoot high volume manufacturing problems and ensured the successful startup and the ramp up of the 3D NAND memory production • Supported multiple manufacturing areas including photolithography, wet etch, and diffusion processes. Trained team members on project development, process control theory, and troubleshooting methodology Show less

Research Assistant

• Sep 2010 - Feb 2016

Research Project 1. Modeling of charge transport in innovative semiconducting materials (organic polymeric materials and hybrid perovskite materials) for emerging photovoltaic technologies • Developed and validated dynamic and steady-state models for the electron and hole transport in organic and hybrid perovskite photovoltaic devices to analyze charge transport kinetics and the solar device structure-property relationship • Designed device layout to maximize the charge generation rate based on material optical properties • Interpreted multi-physical processes in experiments. Quantified physical parameters including diffusion coefficients and kinetic rates to characterize solar device performance • Identified driving phenomena to boost solar cell device efficiency via sensitivity analysis • Optimized device performance. Recommended nanostructure design protocols to triple the device efficiencyResearch Topic 2. Investigate atomic species transport in II-VI and III-V core/shell quantum dots. Design stable quantum dot structures through thermal annealing processes • Developed dynamic models of atomic transport in II-VI and III-V based semiconductor ternary quantum dots (TQDs). Interpreted experimental observation of atomic concentration evolution during thermal annealing • Optimized the design of thermodynamically stable TQDs for optoelectronic applications. Quantified key parameters including diffusion coefficients, thermodynamic driving forces, and activation energy barriers for atomic species diffusion Show less

Teaching Assistant

• 2011 - 2015

• Instructed students in the use of MATLAB for solving ODEs and PDEs and nonlinear least square fitting for Fluid Dynamics and Reaction Engineering courses • Coordinated for unit-operation senior lab sessions. Assisted students with the design of experiments and troubleshooting manufacturing processes. Ensured the safety and regulations in the laboratory

Research Assistant

• 2008 - 2010

• Designed seawater desalination unit for ships in a team of three. (National funded undergraduate research program) • Achieved optimal cost-effective production through systematic process analysis of heat and mass transfer and production cost • Designed seawater desalination unit for ships in a team of three. (National funded undergraduate research program) • Achieved optimal cost-effective production through systematic process analysis of heat and mass transfer and production cost

Intern

• Jun 2009 - Jun 2009

Research Assistant

• 2009 - 2009