Mechanical Engineer Chemical Engineering

Chenhui (Eddie) Zhou

San Jose, California ***** • 909-***-**** • **********@*****.***

linkedin.com/in/chenhui-zhou-119651102/• slideshare.net/secret/xjXjAMlDhGskef Highly trained and skilled engineering professional with 3+ years of combined experience driving the design and fabrication of manufactured products. Strong project management skills and attention to detail. Good team player and a team leader. Aiming to leverage my knowledge to effectively perform in the industry. Cleanroom Experience / Process Design & Optimization / Mechanical Reliability Test / Project Management / Team Communication / Device Modeling & Analysis / Multi-task Management / Troubleshooting EDUCATION

Master of Science in Materials Science Engineering Los Angeles, CA University of California, Los Angeles Sept 2017 - June 2019 Bachelor of Science in Chemical Engineering San Diego, CA University of California, San Diego Sept 2013 -June 2017 PROFESSIONAL EXPERIENCE

Mechanical Engineer (7/2020 – Present) Intelligent Optical Systems, Inc., Torrance, CA The project aims to design a large-scale Roll-to-Roll coating system to fabricate chemical (dye & polymer) coated paper sensor efficiently and in a high volume. The paper sensor is used to detect liquid nerve and blister agents by colormetric detection. The system implements the advantage of GUI control, process automation, and SPC method to maintain the manufacture quality.

- Designed high volume chemical thin film sensor manufacturing equipment from prototype to production. Reduced the cost of producing each sensor by 65% using the self-developed manufacture equipment

- Performed reliability testings on the manufacturing system including mechanical stress testing, environmental testing, precision cleaning, chemical testing

- Performed sensor performance testing with nerve and blister agent simulants, and device module characterization with optical sensing, RGB analysis

- Collected and analyzed device data to understand the relations between manufacturing process control and product thin film sensor quality. Improved colormetic detection accuracy of the sensor by 70% overtime through continuous improvement on the system

- Developed and tested new application functions to achieve metrology performance requirement on manufacturing process

-Designed and implemented new functionalities with adding value to HMI’s hardware portfolio

- Used failure analysis methodology to derive a root cause of failure (RCA), and utilized statistical process control (SPC) to maintain the manufacture quality

- Designed 3D plastic and metal components in SolidWorks, operated CNC machining/3D printing/laser cutting to obtain desired plastic/metal components structure

- Applied GD&T (ASME Y14.5) principles and drafting standards

- Performed FEA (deformation and stress analysis) within ANSYS Mechanical Workbench to analyze the stress of mechanical design under different loads

- Worked closely with all departments of the organization to plan and coordinate project activities and communicate status

Materials Engineer (1/2019 – 7/2020) InterPhases Solar, Moorpark, CA The project aims to fully automate the traditional semiconductor thin film device fabrication method and redesign into an integrated, easy-processing, low cost Roll-to-Roll electro-plating manufacturing system. The main target of the application is self-developed Nano-HomoJunction (NHJ) CISe thin film solar cell device, while it also serves as a production line for flexible electronics, battery electrodes with proper configuration changes.

- Designed the complete Roll-to-Roll manufacturing process and system in 2D/3D AutoCAD. Individually designed the ElectroChemical plating system, and Atomized Spraying Pyrolysis system with SPC methods and HMI GUI for process control

- Performed film bonding, electrochemical deposition, etching, RCA cleaning, rapid temperature annealing

(RTA), sputtering, inkjet printing, and EVA lamination/encapsulation to obtain a complete and well functioning CISe solar cell prototype

- Performed electro-optical characterization (SEM, XRF, AFM, PL, EQE) and statistical analysis of device module to examine IV curve, photo current, film compositions

- Designed the CISe device structure by choosing band matching p+ layer, n+ layer, and front contact layer materials. Simulated device IV curve and quantum efficiency in SCAPS

- Hands-on fabricated CISe thin film following laboratory level DOE, operated ElectroChemical deposition system with fiber optic illuminator, potentiostat, chopper and lock-in amplifier

- Scaled-up by 10 times of the production from small laboratory experimental fabrication to pilot line manufacture

- Came up a well functioning flow cell prototype which saved nearly 80% of time on each deposition with the required -+ 0.1 μm device film thickness tolerance

- Utilized QA SOP to perform line checks and root cause analysis (RCA) to improve the production process

- Analyzed 1000+ fabricated device in terms of cost and performance. Analyzed device data and controllable variables in MATLAB and Tableau to increase the efficiency of the cell by nearly 300% over time Research Intern (6/2018 – 9/2018) Nagoya University, Nagoya, Japan Our project designed to heteroepitaxially grow highly oriented GaN thin film on different non-single crystal substrates using a Si(100) template layer formed by Aluminum-Induced Crystallization (AIC) method. The AIC method is used as an alternative of current (100) silicon thin film growth methods, while the current commonly used fabrication methods have trade-offs between cost, time, and film quality. At the end of the project, the 4 people team successfully came up with a high quality GaN and silicon film with saving nearly 95% time and cost of traditional methods. The project was sponsored by Research Center for Materials Science

(RCMS) at Nagoya University and University of California, Los Angeles.

- Yield 95% high quality GaN and silicon thin film on STO, sapphire, and silicon substrates by AIC method combining CVD, Vacuum Sputtering, Evaporation deposition, and Rapid Temperature Annealing (RTA) techniques

- Studied and patternized the AIC growth mechanism by analyzing the imaging and statistical data, therefore apply AIC Silicon growth on other materials in prototyping iterations

- Demonstrated the effect of substrate surface chemistry on film kinetics and morphology through in-situ microscopy, SEM, XRD, AFM, EBSD, EDX, and TEM characterization methods

- Utilized SEMulator 3D to simulate and visualize the step-by-step semiconductor fabrication process and helped to understand process failure modes

- Developed the project flow including pre-experiment literature research, assigning individual tasks, hands-on fabrication, device characterization and post-experiment data analysis steps

- Ensured strong connection between team members and held weekly presentation to discuss project progression

Project Assistant (9/2015 – 8/2017) UCSD, San Diego, CA The project aims to use the core-shell particle design to improve the quantum efficiency of rare earth elements doped nanophosphor. The dense ceramic phosphors are synthesized through sol-gel method and grinded into powders. The research and work are performed under supervision of Dr. Jungmin Ha and Prof. Joanna McKittrick at University of California, San Diego.

- Designed core-shell structure for nanosized phosphors to encapsulate leaking photons, and improved 60% external quantum efficiency

- Utilized Pechini method to form homogeneous precursor solution containing metal–citrate chelate complexes, and added ammonium hydroxide to initiate precipitation

- Studied how wet chemical growth conditions affected particles morphology and optical performance through analyzing material characterization data (XRD, AFM, EBSD, EDX, TEM) of surface topography and light emission

- Calculated the crystallite sizes, lattice parameters, and ratio of the phases presented by Rietveld refinement

-Operated and maintained multiple systems. Developed standard operating procedures and safety protocols for the new users

Quality Control Technician (6/2015 – 9/2015) Whacool, Hangzhou, China

- Followed SOP through the production. Prepared and examined the quality of sampling coolant in HPLC analysis

- Designed unlined carbon steel tank for coolant storage in AutoCAD

- Evaluated heat treated steel and cast iron for refrigerant applications using microhardness, Rockwell hardness, and Charpy impact testing

- Prepared test pieces for metallurgical testing via CNC machining, mounting, polishing, and milling

- Examined, categorized and sorted incoming documents. Maintained computer-based data systems

- Produced weekly reports using advanced Excel spreadsheet functions. Assisted with file organization, and research and development

TECHNICAL PROFICIENCIES

Skills: Equipment Design, Design of Experiments, SPC, Process Automation, Root Cause Analysis, PVD, Electrochemical Deposition, Electro-Optical Characterization Software: AutoCAD, SolidWorks, Minitab, Optilayer, ChemPro, SigmaPlot, MS Office Suite, LabVIEW, SEMulator 3D, JMP, ANSYS, Tableau, Aspen, COMSOL, Igor, SPSS

Programming: MATLAB, Python, Octave, R, SQL, VBA, Latex, C++ PUBLICATION

1. Zhou, C., Hainey, M., Usami, N., “Aluminum Induced Crystallization of Si Thin Film on Strontium Titanate Substrate.” JUACEP Independent Research, 27-31. (2018) 2. Ha, J., Novitskaya, E., Hirata, G.A., Zhou, C., Ridley, R.E., Graeve, O.A., McKittrick, J. “A Facile Method Using a Flux to Improve Quantum Efficiency of Submicron Particle Sized Phosphors for Solid-State Lighting Applications.” Ceramics, 1, 38-53. (2018)

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