Peerapat Suwanphorung

Process Engineer

Professional Summary

Engineer with 15+ years in high-tech electronics manufacturing (hard disk drive heads) in cleanroom production. Evaluates new processes and engineering changes through qualification builds and reliability testing, reporting clear recommendations to process owners and management. Experienced in build instructions, cycle-time reduction and technician supervision.

Core Competencies

Portfolio Project

Slider Process Validation Dashboard

validate.songvijit.com ↗

Evaluates a split-lot process change against POR from BQST/SDET results (mean shift, box plots vs. spec limits, paired tracking) and gives a pass / caution / fail recommendation.

Work Experience

Staff Engineer

Western Digital (Thailand) Ltd. · Bang Pa-In, Ayutthaya

Build Support & Workflow Optimization

Nov 2025 – Feb 2026
  • Issued build instructions for every experimental build, sequenced around shared-tool slots and soak-time limits.
  • Traced cycle-time overruns to root causes and agreed fixes with production, process owners and IE.
  • Built schedules and tracked KPIs, helping cut cycle time 10% with production, process and equipment teams.

Process Development & Characterization

Jan 2024 – Nov 2025
  • Supported characterization of next-generation HAMR technology and investigated failures in new processes.
  • Contributed pole-tip-recession (PTR) data to a material change that resolved a dimensional defect.
  • Presented experiment findings to engineering leadership to guide next steps.
  • Introduced a weekly lab-priority agreement for shared SEM requests, reducing mid-week priority changes.

Process Validation

Jan 2022 – Dec 2023
  • Coordinated roughly 10 new-process validation projects over two years, from build scheduling to test reporting.
  • Ran qualification builds and tests on new processes and changes, feeding results to process owners for release.
  • Interpreted BQST/SDET electrical results and reviewed HAST and NaCl reliability reports.

Senior Engineer / Supervisor

Western Digital (Thailand) Ltd. · Bang Pa-In, Ayutthaya

Cleanliness & Electrostatic Control

May 2019 – Dec 2021
  • Monitored contamination in two cleanroom buildings, directing corrective action through three technician teams.
  • Worked with industrial engineering on lasting tool fixes (door openings, robot paths, monitoring-probe locations).
  • Followed ESD control procedures set by the team's ESD specialist to protect sensitive head components.
  • Supervised 20+ personnel: shift planning, leave and overtime approval, Kaizen activities.
  • Part of the team managing two cleanroom shutdown-and-restart cycles, with no major issues at restart.

Test Engineering

Jun 2013 – Apr 2019
  • Planned DOE test execution on GUZIK head testers, converting testers per product and directing technician setup.

Advanced System Failure Analysis

Oct 2010 – May 2013
  • Performed failure analysis on reliability-test failures (oscilloscope signal capture, drive bring-up, error duplication).
  • Developed corrective actions for recurring failure modes with R&D, quality and manufacturing.

Earlier Career

Education