Kristine April Macatangay
Calamba City
Summary
Semiconductor Test Engineer with 10+ years of experience in backend test engineering, ATE program development, and yield optimization. Skilled in Final Test operations, NPI support, device qualification, fab transfers, and new package introduction for MOSFET, GaN, and power devices. Proven success in test time reduction, cost savings, and correlation studies to support high-volume manufacturing. Strong background in debugging and cross-site collaboration with global engineering teams. Six Sigma Greenbelt Certified with multiple awards for technical innovation and capacity improvement.
Overview
15
15
years of professional experience
Work History
Test Engineer, Backend Test Engineering
Nexperia Philippines Inc.
07.2023 - Current
- Lead Final Test operations for PowerMOS and GaN devices across multiple global backend sites.
- Develop and optimize ATE test programs and hardware setups to support high-volume manufacturing (RTP & Safe Launch).
- Act as Product Engineer for selected devices, managing full lifecycle performance from NPI to mass production.
- Provide root cause analysis and technical disposition for parametric failures using 8D methodologies.
- Qualify new Final Test equipment (testers and handlers) via correlation, Gage R&R, stability checks, and production release.
- Collaborate with global Test and Product Engineers to standardize test strategies and qualification plans.
- Drive continuous improvement projects to improve yield, test time, and production quality.
- Key Achievements – SLA Test Engineer (2023)
- Rolled out extended binning on 44 devices (68% coverage), improving CPM yield stability.
- Improved VSDS and IDSS yield, saving ~17.5K USD (Q2–Q3) by updating sigma limits and PAT settings.
- Reduced FPAT_Verification rejects by 25% (SOT1023, SSGB project).
- Shortened SOT1023 test time by 7%, adding +5K units/day per machine in capacity.
- Supported release of new technologies/devices (T12, T14, T15, T17, LNG R&D) and the CCPAK GaN package, ensuring stable yield and smooth fab/package
- Implemented Automated SPAT feasibility via AWACS, reducing PAT overkill on 5 devices.
- Optimized Reprocess Test Requirements, cutting rejects by 25% with 100% job update completion.
Jr. SLA Test Engineer
Nexperia Philippines Inc.
11.2020 - 07.2023
- Assisted in ATE program development, ECO implementation, and NPI qualification for PowerMOS devices.
- Championed test efficiency initiatives, reducing test time and improving throughput via MOOI projects and index standardization.
- Partnered with Product Engineering to monitor electrical performance trends and support failure analysis.
- Maintained Gage R&R compliance and monitored capacity entitlement for stable operations.
- Key Achievements – Jr. SLA Test Engineer
- Developed MEAN-LIM outlier removal (FPAT_DVSD), cutting rejects by 75% and boosting yield by >1%.
- Supported SOT1205 fab release, meeting target yield and ensuring comparable performance with DMAN.
- Qualified Nortech T0247 handler, ensuring correlation, stability checks, and smooth production transfer.
Test Technician (Power Test SLA)
Nexperia Philippines Inc.
07.2018 - 11.2020
- Ran test programs, executed NPI trials, and supported debugging activities.
- Conducted MSA, tester conversions, calibration, and equipment qualification.
- Supported GaN platform development, ensuring smooth transition to mass production.
- Assisted in the qualification of new test handlers (NY20) through correlation and stability checks, ensuring readiness for high-volume production.
- Provided disposition for test hold lots in reference to Test OCAP, ensuring CCT remained within target.
- Performed test verification of Final Test rejects, maintaining CCT on dashboards within required limits.
- Supported engineers on improvement activities, evaluations, and quality investigations.
- Provided test data analysis for engineering qualifications and quality issues.
- Coordinated with manufacturing and support groups to prioritize lots and meet delivery targets.
- Escalated critical/unusual defect occurrences and referred non-conforming lots to BG product.
- Ensured correct disposition of non-conforming lots and identified potential quality risks based on test data.
Test Technician (Power Test)
Nexperia Philippines Inc.
12.2014 - 07.2018
- Troubleshot test rejects and supported failure analysis for MOSFETs, diodes, TRIACs, and thyristors.
- Performed yield analysis, tester correlation, and calibration to maintain production quality.
- Computed and monitored Statistical Bin/Yield Limits (SBL/SYL) for yield tracking.
- Provided lot disposition support, performed verification of rejects, and maintained compliance with OCAP and CCT targets.
- Assisted engineers in process improvement evaluations and root cause investigations.
- Coordinated with production to support manufacturing priorities and timely delivery.
MHE & Facilities Associate
DHL Supply Chain – P&G Cabuyao Plant
01.2013 - 01.2014
- Operated material handling equipment (MHE) and supported facilities maintenance.
- Coordinated with warehouse operations to ensure smooth logistics flow.
Service Crew
Jollibee Foods Corporation
01.2011 - 01.2013
- Delivered quality customer service in a fast-paced environment.
- Developed teamwork, time management, and customer relations skills.
On-the-Job Trainee
Amkor Technology Philippines
04.2012 - 06.2012
- Assisted in test floor operations including monitoring of production output, quality checks, and basic troubleshooting.
- Supported engineers in conducting test evaluations and equipment monitoring.
- Gained hands-on exposure to semiconductor test processes and data analysis.
- Applied theoretical ECE knowledge in a real-world semiconductor manufacturing environment.
Education
Bachelor of Science - Electronics and Communications Engineering
Polytechnic University of the Philippines
Skills
- Assembly & Test Expertise: Final Test, RTP, Safe Launch, ECOs, NPI support
- Semiconductor Devices: MOSFETs, GaN, diodes, power discretes
- ATE & Handlers: PuParse, UIS Tester NY20, ASM, Nortech, TESEC
- Data Analysis & Quality: CpK, GR&R, SPC, OEE, statistical analysis
- Tools: Python, Minitab, Spotfire, Statistica, Excel (Advanced)
- Problem Solving: Root Cause Analysis, 8D, DMAIC, Fishbone, 3x5 Why
- Problem-Solving & Analytical Thinking
- Cross-Functional Collaboration (with BG, Product & Global Test teams)
- Communication & Technical Reporting
- Adaptability in High-Volume Manufacturing Environments
- Leadership & Mentoring of Junior Staff/Technicians
- Continuous Improvement & Lean Mindset
Accomplishments
- 2nd Place – ATCB Technical Forum (2019) | LFPAK Final Test Capacity Improvement
- 3rd Place – Nexperia Technical Forum (2019) | LFPAK Final Test Capacity Improvement
- Six Sigma Greenbelt Certified
- Gawad Sipag Awardee – Perfect Attendance (2016)
Timeline
Test Engineer, Backend Test Engineering
Nexperia Philippines Inc.
07.2023 - Current
Jr. SLA Test Engineer
Nexperia Philippines Inc.
11.2020 - 07.2023
Test Technician (Power Test SLA)
Nexperia Philippines Inc.
07.2018 - 11.2020
Test Technician (Power Test)
Nexperia Philippines Inc.
12.2014 - 07.2018
MHE & Facilities Associate
DHL Supply Chain – P&G Cabuyao Plant
01.2013 - 01.2014
On-the-Job Trainee
Amkor Technology Philippines
04.2012 - 06.2012
Service Crew
Jollibee Foods Corporation
01.2011 - 01.2013
Bachelor of Science - Electronics and Communications Engineering
Polytechnic University of the Philippines