Phaptawan Wichian

Chemical Engineering graduate with hands-on experience in production process control and defect analysis. Passionate about applying engineering expertise in industrial settings and collaborating with cross-functional teams to drive effective problem-solving. Experienced in Design of Experiments (DOE) and Root Cause Analysis.

Production Engineer at Fujikura Electronics (Thailand) Ltd. (2025-07 – 2026-03)

• Controlled and maintained production equipment including Circuit Scrubbing (CSC), Chemical Scrubbing (KCHS), Development (LSD) and Baking (LSB) processes.
• Ensured production output, quality, and efficiency met operational targets.
• Monitored and adjusted chemical concentration parameters to ensure compliance with control limits.
• Analyzed and identified root causes of product defects using technical methods such as cross-section analysis, SEM-EDX elemental analysis, thermal stress, reflow, peel-off, cross-cut, and temperature & humidity.
• Prepared technical reports summarizing defect analysis, root causes, and improvement actions.
• Implemented corrective and preventive actions (CAPA) to prevent recurrence of process abnormalities.
• Troubleshot on-site production problems to reduce downtime and improve yield.
• Collaborated with cross-functional teams to implement process improvements and ensure stable production performance.
• Designed and executed Design of Experiments (DOE) to identify critical process parameters affecting defect generation.
• Achieved a reduction in defect rate from 16% to 1% by applying DOE and optimizing process conditions.

Bachelor's in Chemical Engineering in Chemical Engineering – Prince of Songkla University (2021 – 2025)