Test Process Engineer - Semiconductor

Job Description

CT Semiconductor is a strategic member of CT Group. We are pioneers in the semiconductor industry – the foundational technology powering future innovations such as AI, IoT, electric vehicles, and smart devices.

Key Responsibilities:

Customer Interface & Support

• Serve as the technical point-of-contact for test-related issues, escalations, and inquiries at the customer site.

• Support customer requirements for test development, validation, and production ramp-up.

• Collaborate with customer engineers to understand specifications, timelines, and quality expectations.

• Provide timely feedback and updates to internal teams and customers on test performance and issue resolution.

OSAT Test Oversight

• Oversee day-to-day test operations at OSATs including test program deployment, hardware debugging, and yield monitoring.

• Ensure test equipment and handlers at OSAT sites are functioning as expected and properly maintained.

• Support and audit OSATs to ensure compliance with test procedures, quality standards, and documentation.

• Participate in test hardware reviews (load boards, probe cards) and interface with test engineering and hardware design teams.

Test Process Improvement

• Drive root cause analysis and resolution of test escapes, yield losses, and test time inefficiencies.

• Analyze test data to identify trends, anomalies, and areas for improvement.

• Work with OSATs to implement process changes or test optimization strategies to enhance throughput, yield, and test coverage.

• Support Golden Device and correlation activities between sites, testers, and test platforms.

NPI and Change Management

• Support New Product Introduction (NPI) from test development handoff to production ramp at OSATs.

• Coordinate with R&D and central test engineering to validate and release test programs.

• Manage test engineering change orders (ECOs), including program revisions, binning changes, and test flow updates.

• Ensure seamless test program and hardware transitions across test platforms or OSAT sites.

Documentation & Reporting

• Maintain up-to-date documentation of test flows, procedures, change logs, and qualification records.

• Generate regular reports on test KPIs (yield, OEE, retest rate, escapes, etc.) for both internal and customer review.

• Track and report OSAT performance metrics, and lead business reviews with key stakeholders.

Job Requirement

Requirements:

Education & Experience

• Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, or a related discipline.

• 3 years of experience in semiconductor test engineering or OSAT management.

• Strong hands-on experience with test platforms such as Advantest (93K), Teradyne (UltraFlex/J750), or NI STS.

• Familiarity with ATE test development, debug, and correlation.

Technical Skills

• Proficiency in test development tools, ATE scripting (e.g., C/C++, Python, STIL, etc.), and hardware debugging.

• Strong understanding of test methodologies: digital, analog, mixed-signal, RF (based on product).

• Knowledge of data analysis tools (JMP, Python, Excel) and semiconductor yield analysis techniques.

• Experience with test data collection systems (e.g., Exensio, Galaxy, YieldHub) is a plus.

Soft Skills

• Excellent communication and interpersonal skills, especially in customer-facing roles.

• Self-starter with strong problem-solving, decision-making, and troubleshooting skills.

• Ability to manage multiple priorities in a fast-paced, dynamic environment.

• Strong organizational skills with attention to detail and accuracy.