Weisen Ji
Process Engineer @ Lumentum | Materials Engineering, Plasma Etching
- Role
- Process Engineer at Lumentum
- Location
- El Cerrito, CA, US
- LinkedIn followers
- 500 followers
About Weisen Ji
At Lumentum, my role as a Process Engineer capitalizes on my UC Berkeley education in…
Experience
Process Engineer
Jul 2022 — Present · San Jose, CA, US
Lead the plasma etching process for PLC chip core fabrication, optimizing critical dimensions to enhance device performance and quality, resulting in a significant increase in yield-Collaborate closely with the photolithography team to streamline the process, achieving a 53% reduction in photoresist usage for one specific process-Conduct PFMEA for critical manufacturing processes, identifying failure modes and implementing preventive measures-Led cross-fab internal audits to evaluate compliance with manufacturing documentation standards and quality procedures across multiple sites, uncovering critical misalignments and driving systemic improvements in documentation control and operational consistency-Collaborated with supplier engineering and quality teams across multiple sites to resolve non-conformances in mechanical components, defined incoming inspection criteria, and led 8D/corrective action closure with full traceability-Assist in building a quick data collection tool that improves the operation team’s working efficiency-Minimize manufacturing costs and enhanced production efficiency through strategic process optimization-Implement strategies to significantly increase the longevity of consumables, resulting in significant cost reductions-Conduct thorough time studies to enhance production efficiency, personally engaging with operators to gather valuable insights and advice, specifically targeting the reduction of time wastage in unnecessary steps.
Education
University of California, Berkeley
Bachelor's degree
2020 — 2022
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