Yen-Chen C.-Photolithography Engineer
Check rate
Experience
Photolithography Engineer
Headway Technologies
- Improved photolithography process stability and sustained high-volume wafer production by troubleshooting CD, overlay, alignment, and process excursions using SPC, metrology data analysis, and root-cause investigation to implement corrective actions and minimize production impact.
- Improved photolithography process stability and process-window robustness by optimizing develop and agitation parameters through DOE-based process characterization and FIB analysis, establishing more consistent manufacturing conditions.
- Reduced manual engineering analysis and improved process monitoring efficiency by developing Excel/VBA automation for SPC charts and manufacturing data analysis, enabling faster identification of process trends and out-of-spec conditions.
Process Quality Assurance Engineer
Applied Optoelectronics Inc
- Improved customer issue resolution effectiveness by serving as the primary quality interface for customer complaints and driving cross-functional investigations through closure.
- Reduced recurrence of manufacturing and field quality issues by leading 8D, RCA, and CAPA activities across Production, Process Engineering, and R&D teams.
- Enhanced production quality performance by monitoring yield, PPM, FTY, and reliability metrics and initiating corrective actions for abnormal trends.
- Accelerated product qualification and release readiness by supporting NPI quality planning, PFMEA reviews, failure analysis, and reliability assessments.
Research Assistant
University of Houston
- Improved process performance by ~20% through execution of 30+ DOE experiments, optimizing process conditions and material interactions.
- Operated and maintained custom experimental instrumentation and automated laboratory systems for materials characterization and testing.
- Collected and analyzed 1000+ experimental datasets using JMP, MATLAB, and Python, supporting data-driven technical decision-making.
- Performed optical and surface characterization using microscopy and metrology techniques while maintaining experimental workflows and technical documentation.
On-chip Color Filter (OCF) Process Integration Engineer
Tekscend Photomask (formerly Toppan Photomask)
- Increased yield by ~30% and reduced defects by ~25% by optimizing manufacturing processes using DOE and SPC methodologies.
- Improved process capability by ~15% through 10+ RCA, FMEA, and 8D investigations, resolving process variation and quality issues.
- Supported process qualification and production ramp activities, enabling stable transition into high-volume manufacturing.
- Performed metrology, inspection, and statistical trend analysis, improving process control and manufacturing consistency.
Industry experience
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Experienced in Manufacturing, Education, and Telecommunication.
Business area experience
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Experienced in Production, Quality Assurance, Research and Development, Operations, and Product Development.
Summary
Engineer with experience in process development, materials characterization, and experimental workflow execution within R&D and high-precision manufacturing environments. Skilled in DOE, SPC, process optimization, and data analysis to improve process reliability, reproducibility, and operational efficiency. Experienced in surface processing, metrology, instrumentation operation, and technical documentation, with strong analytical and troubleshooting capabilities.
Skills
- Process & Laboratory Engineering: Experimental Workflow Execution, Doe, Spc, Process Optimization, Sop Development
- Materials & Characterization: Surface Processing, Thin Films, Optical Microscopy, Metrology, Materials Characterization
- Manufacturing & Quality: Process Documentation, Technical Reporting, Rca, 8d, Data Integrity
- Data & Tools: Jmp, Excel (Advanced), Matlab, Python (Basic), Sql (Basic), Solidworks
Languages
Education
University of Houston
Master of Science in Chemistry · Chemistry · Houston, United States
National Taiwan University
Master of Science in Chemistry · Chemistry · Taipei, Taiwan, Province of China
National Taipei University of Education
Bachelor of Science in Nature Science of Education · Nature Science of Education · Taipei, Taiwan, Province of China
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Yen-Chen is based in San Jose, United States and prefers 100% remote projects.
Yen-Chen speaks the following languages: Chinese (Native), English (Advanced).
Yen-Chen has at least 6 years of experience. During this time, Yen-Chen has worked in at least 4 different roles and for 4 different companies. The average length of individual experience is 2 years and 6 months. Note that Yen-Chen may not have shared all experience and actually has more experience.
Based on recent experience, Yen-Chen would be well-suited for roles such as: Photolithography Engineer, Process Quality Assurance Engineer, Research Assistant.
Yen-Chen's most recent position is Photolithography Engineer at Headway Technologies.
In recent years, Yen-Chen has worked for Headway Technologies, Applied Optoelectronics Inc, University of Houston, and Tekscend Photomask (formerly Toppan Photomask).
Yen-Chen is most experienced in industries like Manufacturing, Education, and Telecommunication.
Yen-Chen is most experienced in business areas like Research and Development, Production, and Quality Assurance. Yen-Chen also has some experience in Operations and Product Development.
Yen-Chen has recently worked in industries like Manufacturing, Education, and Telecommunication.
Yen-Chen has recently worked in business areas like Research and Development, Production, and Quality Assurance.
Yen-Chen holds a Master in Chemistry from University of Houston, a Master in Chemistry from National Taiwan University and a Bachelor in Nature Science of Education from National Taipei University of Education.
Yen-Chen is immediately available part-time for suitable projects.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 18 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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