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# Sr Principal Technical Support Engineer

- **Company:** FormFactor
- **Location:** Livermore, CA, United States
- **Experience:** Expert
- **Salary:** $122,600 - $160,965
- **Contract:** Permanent contract
- **Skills:** Data Analysis, Big Data, Software Debugging, Micro Electro-Mechanical Systems (MEMS), Microsoft Office
- **Published:** October 26, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=22c71b6b9718bd3c

## About the Role

The ideal candidate combines deep knowledge of semiconductor test processes, probe card technology, and strong customer engagement skills. Hands-on mechanical ability and wafer prober operation skills for occasional on-site customer support is highly desirable. Ability to speak Mandarin or Korean is a plus., * Experience with FormFactor probe cards or similar technologies.

 * Knowledge of advanced nodes (e.g., FinFET, 5nm/3nm processes).
 * Experience supporting high-volume manufacturing (HVM).
 * Familiarity with yield engineering and test optimization.
 * Prior field application or customer-facing experience.
 * Automatic Wafer Prober user experience.
 * Hands-on mechanical assembly / electrical debug experience.

Skills:
Analytical Analysis, Clean Room Environment, Communication, Customer-Focused, Data Analysis Tools, Debugging, Electrical Measurements, Korean Language, Mandarin Chinese Language, Microsoft Office, Probe Cards, Probe Stations, Problem Solving, Semiconductors, Wafer Probing, Wafer Sort, Working in a Fast-Paced Environment

Education & Experience:
Minimum of 8 years of related experience with a Bachelor's degree; or 6 years and a Master's degree; or a PhD with 3 years experience; or equivalent experience | Required

## Description

The Sr Principal Technical Support Engineer for Probe Cards provides expert-level technical support for FormFactor's advanced probe card products used in semiconductor wafer testing. This role serves as a key interface between customers, product engineering, manufacturing, and field service teams to ensure optimal performance, fast issue resolution, and continuous product improvement., * Provide technical support for probe card products in production environments

 * Diagnose and resolve electrical, mechanical, and process-related issues impacting probe card performance
 * Support customers having Yield excursions, Electrical continuity issues, Contact problems (MEMS probe alignment, wear, contamination), and Parametric anomalies during wafer sort.
 * Act as primary escalation points for complex technical issues.

Failure Analysis & Debug

Perform root cause analysis (RCA) on probe card failures using:

 * ATE (Automated Test Equipment) data.
 * Electrical measurements.
 * Microscopy and inspection tools.
 * Interpret wafer sort data to identify probe-related anomalies.
 * Collaborate with FA lab to drive corrective actions.

Product & Process Expertise

 * Develop deep expertise in FormFactor probe technologies (e.g., MEMS, cantilever, vertical probes).
 * Provide guidance on: Probe card setup and optimization, Overdrive, contact force, and cleaning cycles, and Alignment procedures and maintenance practices.
 * Support new product introductions (NPI) and customer qualifications.

Cross-Functional Collaboration

 * Work closely with Product engineering (design improvements), Manufacturing (process feedback, yield learning), and Field service teams (onsite troubleshooting).
 * Drive corrective and preventive actions (CAPA).
 * Participate in engineering change requests (ECR/ECO).

Onsite & Remote Support

 * Provide onsite support at customer fabs and OSATs when required
 * Conduct technical reviews and troubleshooting sessions with customers
 * Deliver training on probe card operation, maintenance, and best practices

Data Analysis & Reporting

 * Analyze large datasets from wafer test systems to identify trends and issues
 * Create detailed technical reports, dashboards, and failure summaries
 * Track key metrics such as Contact resistance, Yield loss attributable to probe cards, and MTBF (Mean Time Between Failures).