Peerapat Suwanphorung

Senior Test Engineer

Professional Summary

Engineer with 15+ years in precision electronics component manufacturing (HDD read/write heads), including direct test-engineering experience planning DOE test execution and qualifying test equipment for new products. Evaluates new processes and engineering changes through qualification builds and reliability testing, feeding clear, data-driven recommendations to process owners and management.

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
  • Coordinated DOE test scheduling and execution on GUZIK head testers for close to six years, working from test requests submitted by process engineering teams.
  • Planned technician-led conversions of GUZIK testers between products and directed technician setup and spare-parts preparation ahead of each test run.
  • Supported day-to-day test-floor coordination across a multi-technician team, building broad familiarity with test-equipment operation and scheduling across product lines.

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