Junior Test Engineer
SWIR Vision Systems
Quality Assurance
Bucheon-si, Gyeonggi-do, South Korea
Posted on Dec 4, 2025
As a Probe Engineer, you will be responsible for electrical testing and sorting of semiconductor dies on wafers. You will operate and maintain probe equipment, analyze test data, and collaborate with device and test engineering teams to ensure high yield and quality. This role is ideal for recent graduates with a strong interest in semiconductor manufacturing and test processes.
onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.
More details about our company benefits can be found here:
| We are committed to sourcing, attracting, and hiring high-performance innovators, while providing all candidates a positive recruitment experience that builds our brand as a great place to work. |
- Bachelor’s degree in Electrical Engineering, Electronics, Semiconductor Engineering, or related field
- Basic understanding of semiconductor devices and wafer fabrication processes
- Familiarity with probe station operation and test principles is a plus
- Strong analytical and problem-solving skills
- Effective communication skills in English (written and verbal)
- Proficiency in MS Office (Excel, PowerPoint, Word)
- Operate probe stations and testers to perform Electrical Die Sorting (EDS) on semiconductor wafers
- Analyze wafer-level test data to identify good and defective dies
- Manage probe cards and ensure proper contact between tester and wafer pads
- Perform inking or IDA (Ink Dot Application) on defective dies for downstream sorting
- Monitor and improve probe yield and test efficiency
- Collaborate with device engineers and test engineers to resolve probe-related issues
- Maintain and calibrate probe equipment including testers and probers
- Support wafer sort process optimization and yield improvement initiatives