Chunliang Zheng

**** ******* ***, *******, ** ***02 • Mobile: 650-***-**** • add3po@r.postjobfree.com Senior Development Engineer, Optical and Electrical Engineering Finding creative solutions to technical problems in fast-paced environments

• Extensive experience and knowledge with optical devices (passive and active) design and simulation.

• Proficient in various semiconductor and optical devices modeling software like Lumerical FDTD Solutions, Comsol, RSoft BeamPROP, FIMMwave, TCAD Sentaurus, Code V, Zemax etc.

• Proficient in various programming language like Python, Matlab, VBA, C++, JMP.

• Comprehensive foundation in optics, photonics, lasers, fiber optics, semiconductor device physics, photovoltaic devices physics, and thin film semiconductor materials.

• Confidence working with and trouble-shooting issues related to optical and electrical testing, including measurement and diagnostic techniques.

• Proficient in Design of Experiment (DOE) based process development, verification of product performance and process monitoring (SPC).

• Demonstrated maturity, leadership, and attention to detail in all projects. Committed to achieving deliverables through a dedicated, proactive work ethic and creative mindset.

• Strong ability to work productively in team settings, especially cross-functional teams, and adapt quickly to new and varied types of roles and projects.

• Effective verbal and written communication, including emails, presentations, training materials and protocols. EDUCATION

Master of Science, Electrical Engineering/Photonics GPA: 3.9/4.0 Stanford University Graduated: June 2014

B.Eng. Optical Information Science & Technology GPA: 90.6/100 Beijing Institute of Technology (BIT) Graduated: July 2012 CS Artificial Intelligence Program, Stanford University Expected: 2021 PROFESSIONAL EXPERIENCE

Senior Engineer – Cisco Systems, Inc San Jose, CA Dec. 2018 - Present

• Drive characterization of internal silicon photonics 100G transceiver product performances and yield improvements.

• Developed Machine Learning regressor models for key parameters prediction at module level based on chip level optical and electrical data, lens and laser assembly data as well as classifier models for binning prediction at module level for process and yield improvement.

• Worked with test engineers to debug testing software and hardware at die level and tunning level as well as conduct tester gage repeatability and reproducibility (GR&R) correlation study. Develop corner testing plan at module level to improve testing efficiency.

• Develop Python programs to automatically generate reports for wafer and OSA level optical data analysis including lot-lot, wafer-wafer performance comparison as well as fabrication process and tool correlation study.

• Responsible for taking joint design manufacturer (JDM), original equipment manufacturer (OEM) and contract manufacturer (CM) optical transceivers from prototype to high volume manufacturing (HVM).

• Develop Python programs to realize EEPROM automatic check for all OEM/JDM products from 10G to 400G based on MSA specs and automatically generate qualification report.

• Build and maintain database to save all the qualification data for performance debug or comparison analysis as well as build a framework for automatic data extraction, transformation, loading, processing and analysis.

• Work in collaboration with Engineering and Technology & Quality teams to maintain supply chain commitments and quality metrics as well as with Program Managers concurrently to maintain a multi-source cost competitive portfolio.

• Review qualification plans and DVT results with product development and validation engineers. Staff Engineer – Lumentum Operations LLC San Jose, CA Mar. 2018 - Dec. 2018

• Performed statistical data analysis, developed programs to automatically generate yield pareto chart and troubleshot potential root causes for yield excursions for both mass production and NPI laser chip products.

• Led cross-functional team to drive yield improvement and product cost reduction for various laser products.

• Coordinated with cross-functional team (EPI, process, assembly, test etc) to ensure manufacturing readiness of laser chip design and specs, new equipment’s qualification plan including conducting tester gage repeatability and reproducibility (GR&R) correlation study, documentations including process flow and specs and failure modes and effects analysis (FMEA), and test database infrastructure etc.

• Worked closely with optical sub-assembly (OSA) and module team to identify and solve issues at contract manufacturer in Asia for chip performance improvement and process optimization.

• Worked closely with R&D team to support new product introduction (NPI) on next generation laser chips.

• Supported daily production through solving issues in real-time as well as leading the analysis of failures on the wafer fabrication and testing production line.

• Worked closely with quality and reliability team for manufacturing process control plan to ensure the delivered products with high level of quality and reliability as well as identify risks. Senior Development Engineer – Mellanox Technologies Inc Monterey Park, CA Nov. 2016 – Mar. 2018

• Developed chip level solutions for passive and active optical devices in silicon for interconnect applications.

• Designed, layout and simulated photonic wave-guiding structures using RSoft BeamPROP, FIMMwave, FIMMPro and Lumerical FDTD Solutions for high-speed 100G, 200G and 400G transceiver module.

• Built 3D photonic device simulation model for heat performance analysis using Comsol to reduce the risk of device self-heating and improve robustness.

• Developed Matlab programs for automatic data extraction and processing to generate summary with customized graphs and global view of data; Speed up data processing by 10 times.

• Analyzed test data from measured devices and identify root causes and potential solutions for performance failures.

• Worked in cross-functional team with process integration engineers to optimize product performance including process optimization and improve yield at contract manufacturer in Asia.

• Created and performed design verification checks for existing and next generation products.

• Tested and calibrated DC/AC optical testing system, ensured the accuracy and consistency of measurement data and developed methods of standardization for data collection and analysis. Senior Engineer – Enovix Corporation Fremont, CA Jan. 2016 – Nov. 2016

• Performed 3D Si lithium-ion battery characterization and work in cross functional team to increase battery energy density and charge/discharge cycles using Failure Analysis (FA) techniques, DOE and data analysis.

• Developed and optimized assembling and packaging processes for yield and battery performance improvement.

• Developed and tested metrology for laser material process characterization and monitoring.

• Worked on manufacturing process plan and preparation for technology transfer to high volume manufacturing (HVM) to ensure the readiness of mass production.

Product Development Engineer (Cell and Laser) – Solexel, Inc Milpitas, CA Jun. 2014 – Jan. 2016

• Managed mass production yield and worked in cross functional team with integration engineers to increase solar cell efficiency, improve tool throughput, and achieve target yields, using FA techniques, DOE and data analysis.

• Took full ownership of three laser materials processes (silicon and metal ablation using ns IR fiber laser and via drilling using ns CO2 laser) including process development, optimization for robustness and manufacturability through improved laser process parameters (power, pulse energy, pulse width, frequency, pitch).

• Increased throughput by 50% through process improvements and collaboration with suppliers. Worked with tool vendor for key machine upgrade, coordinated demos and set specifications for custom laser improvements with multiple laser vendors, and drove automation vendor to shorter cycle time.

• Defined and tested in-line integrated metrology for Solexel’s manufacturing line for 3 processes allowing improved yield and early failure detection in HVM.

• Reduced needed machines from 7 to 4 for 200MW line (saving approximately $1.6M capital cost per 200MW line).

• Created solar cell architecture dictated laser design and patterns using appropriate software and programming. Intern – Philips Lumileds San Jose, CA Jun. 2013 – Sep. 2013

• Developed VBA (macro) programs in Excel for automatic data extraction and processing from 3 LED metrology tools to generate summary workbook with customized graphs and global view of data.

• Completed routine measurement and performance analysis for various LED devices (SnapLED, K2, DBC, novel double dome and quantum well structures) under different environmental and electrical conditions for research DOE and to assess manufacturability.

• Used failure analysis techniques (SEM, AFM) to test and characterize different LED structures.

• Documented hardware and software operations manual for 3 LED metrology tools (Casflux, LTEL, NGEL). SKILLS

Programming Languages: Matlab, JMP, VBA, C/C++, Python, SQL Software: Rsoft BeamPROP, Comsol, Zemax, Labview, Lumerical FDTD Solutions, TCAD Sentaurus, FIMMwave, Labview Characterization Techniques: SEM/EDS, AFM, TEM, EBSD, VPD, 3D surface profiling, Light microscopy, Probe Station

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