Senior Semiconductor Test Professional with 11+ years of expertise specializing in wafer-level metrology, optical systems, and advanced hardware troubleshooting. Offers a powerful combination of 10 years as an Associate Test Engineer at Onto Innovation and 15 months as a Field Service Engineer at Ushio America. Proven track record executing high-precision automated test sequences, managing critical engineering escalations, and performing complex optical alignments. Expert in diagnosing data anomalies, driving root-cause failure analysis, and collaborating with cross-functional engineering teams to optimize lab workflows and yield.
Overview
11
11
years of professional experience
Work History
Field Service Engineer
Ushio America, Inc
08.2025 - Current
Managed the on-site technical uptime, optimization, and preventative maintenance of highly advanced photolithography EUV light sources inside fast-paced, high-volume semiconductor fabrication facilities.
Performed advanced, component-level root-cause analysis on complex vacuum, thermal, and electro-mechanical sub-systems under intense, time-critical constraints to minimize customer tool downtime.
Documented and tracked systemic tool failures and infant-mortality defects in the field, translating real-world performance data back to factory factory-level QA and NPI teams to drive design-for-reliability (DFR) improvements.
Served as the primary technical point of contact for premier semiconductor customers; managed expectations, delivered detailed failure reports, and validated tool performance to achieve formal customer buy-off.
Collaborated with global engineering teams to deploy fields updates, validate engineering change orders (ECOs), and execute localized containment actions for recurring equipment hardware bugs.
Authored detailed technical service reports documenting tool status, root-cause diagnostics, and uptime metrics to track equipment reliability trends.
Associate Test Engineer 1
Onto Innovation (Formerly Nanometrics)
08.2015 - 08.2025
Associate Test Engineer I(2019 – 2025)
Executed comprehensive set-up, calibration, and system-level testing for Onto Innovation IRIS S and Atlas XP+/MPU metrology tools to ensure optimal semiconductor wafer measurement accuracy.
Configured and deployed custom user options and labeling systems for Atlas III+ and Atlas V tools to meet client-specific technical requirements.
Authored comprehensive technical escalation reports for engineering support, detailing system logs, error codes, and preliminary troubleshooting steps.
Mentored and coached assembly and test technicians on advanced calibration procedures and troubleshooting methodologies, elevating the team's collective hardware validation capabilities.
Served as the primary technical point of contact and escalation resource, guiding team members through complex optical alignment troubleshooting and system-level debugging.
Associate Test Engineer (2015 – 2019)
Assembled and integrated high-precision sub-assemblies for Atlas II+ and Atlas III / III+ inline OCD metrology tools, including 300mm XY-Theta stages, robotic wafer handlers, and complex optical modules
Tested, troubleshot, and reworked complex assemblies and final systems using Atlas II+ and Atlas III tools, ensuring all systems met strict quality and operational standards.
Collaborated closely with manufacturing engineering to identify build-documentation gaps, improving assembly efficiency and stream-lining the production cycle for advanced metrology systems.
Handled sensitive components under strict cleanroom protocols, ensuring the safe mechanical deployment of high-pressure pneumatics, robotic automation arms, and heavy internal positioning stages.
Utilized torque wrenches, gauges, and precision measurement instruments to ensure mechanical tolerances met strict sub-micron specifications before passing tools to the final test phase.