LIHANN JERRELL JOSEPH JOK
Phoenix,AZ
Summary
Results-driven Process Engineer with experience in the semiconductor and renewable energy industries, specializing in optimizing operational efficiency and enhancing quality management systems. Proven ability to collaborate cross-functionally, streamline processes, and drive continuous improvement initiatives that deliver measurable results.
Overview
3
3
years of professional experience
Work History
Dry Etch Process Engineer
Taiwan Semiconductor Manufacturing Company
Phoenix, AZ
03.2025 - Current
- Team lead for process chart quality management, responsible for reporting process deviations to the quality team, concurrently implementing preventive measures, and optimizing procedures to enhance quality and operational efficiency.
- Spearheaded and supported equipment engineers for the installation and qualification of Lam Research etch chambers.
- Develop an automatic tuning system through TSMC's tuning application farm (TAF), allowing process technicians to tune process parameters when engineers are absent.
- Maintained advanced 4 nm/5 nm FinFET logic process by monitoring routine data indicators.
Dry Etch Process Engineering Intern
Taiwan Semiconductor Manufacturing Company
Phoenix, AZ
05.2024 - 08.2024
- Developed a Best Known Method(BKM) to troubleshoot wafer particle issues and reduced wafer backside particle count by 70%, which led to a potential increase of Wafer Per Hour(WPH) throughput by 50%.
- Designed and executed experiments to study the effectiveness of tool cleaning procedures.
- Collaborated with process engineers from different departments to perform root cause analysis on wafer quality issues.
- Supported colleagues with analyzing big data sets from statistical process control tools.
Process Engineering Intern
Valero Renewable Fuels
Welcome, MN
05.2023 - 12.2023
- Designed and planned the installation of a purge sample system into the slurry tank to improve the safety of process operators.
- Implemented installation of silo measuring equipment, which led to an 80% reduction in the time needed to measure silo volume.
- Calculated pressure drop of a regen tank PSV discharge relief piping line to ensure compliance with API standards.
- Developed, revised, and combined P&IDs to improve the accuracy of what is in the plant.
- Successfully executed assigned projects as a result of strong communication and collaboration with process operators, maintenance, and supply chain.
Education
Bachelor of Science - Chemical Engineering
Iowa State University
12.2024
American Degree Transfer Program -
Methodist College of Kuala Lumpur
12.2019
Skills
- C, Python, MATLAB, SAP, AutoCad, PI systems, ProMax, Aspen Plus, JMP, Statistical Process Control (SPC)
- Operating systems: Windows and macOS
- Microsoft Office (Excel, Word, Powerpoint,Visio)
- Process flow analysis
- Root-cause analysis
- Design of experiments
Leadership
Campus Fellowship - Leadership team/Bible study leader
- Attended weekly meetings to discuss and plan future events.
- Led weekly bible studies.
- Facilitated discussions on selected book of the Bible.
Ames Student Association for Malaysian Students - F&B Co-Director
- Led meetings to discuss and plan future events.
- Planned and prepared food and beverages for events.
- Coordinated and delegated responsibilities for yearly Chinese New Year event.
Timeline
Dry Etch Process Engineer
Taiwan Semiconductor Manufacturing Company
03.2025 - Current
Dry Etch Process Engineering Intern
Taiwan Semiconductor Manufacturing Company
05.2024 - 08.2024
Process Engineering Intern
Valero Renewable Fuels
05.2023 - 12.2023
Bachelor of Science - Chemical Engineering
Iowa State University
American Degree Transfer Program -
Methodist College of Kuala Lumpur