Manufacturing Device / Wafer Acceptance Test (WAT) Engineer

Join our organization and support our vision to inspire future technology through leading semiconductor solutions.

Diodes deliver advanced analog and power semiconductor solutions to the world’s leading technology companies, driving innovation, efficiency, and performance across high‑growth markets. Our teams collaborate across engineering, manufacturing, support and corporate functions in a fast‑paced, transparent culture guided by our core values:

Integrity

Commitment

Innovation.

We design reliable technology that improves the world—while prioritizing sustainability, safety, and employee well‑being.

We have an exciting opportunity within Diodes for a Manufacturing Device/Wafer Acceptance Test (WAT) Engineer. This position will support semiconductor technology development and high-volume manufacturing at our South Portland, Maine wafer fabrication facility.

South Portland

Pay range $83,000 to $112,000/year. Actual compensation may vary based on experience, qualifications, skills, and geographic considerations. Incentive compensation and benefits may also be available.

We offer a competitive benefits package to include medical, dental, vision, FSA, 401k with company match, company paid Short-Term and Long-Term disability and standard life insurance policy. We also provide paid time off and have an employee wellness program.

This position offers an excellent opportunity for engineers with experience in semiconductor manufacturing, device engineering, wafer-level electrical testing, or process engineering to develop technical expertise while driving improvements in product quality, process capability, yield, and manufacturing performance.

You will work closely with Technology Development, Process, Quality, and Manufacturing teams to solve complex technical challenges, support new technologies, and develop automated wafer-level electrical test solutions.

• Analyze wafer-level parametric data, process control monitor structures, and device electrical characteristics to identify process excursions and yield-impacting issues.
• Troubleshoot semiconductor device, process, and electrical test-related issues and implement effective corrective actions.
• Utilize Statistical Process Control (SPC), Design of Experiments (DOE), Six Sigma, 8D, and Root Cause Analysis methodologies to improve manufacturing performance.
• Monitor and improve key manufacturing metrics, including yield, process capability (CPK), and electrical performance.
• Support technology development, process evaluations, product characterization, and new product introduction activities.
• Develop software tools, automation solutions, and data analysis methods to increase engineering productivity and manufacturing efficiency.
• Collaborate cross-functionally to drive quality improvements, operational excellence, and cost reduction initiatives.
• Prepare technical reports and present engineering findings and recommendations to stakeholders and management.

• Bachelor's degree or higher in Electrical Engineering, Computer Engineering, Physics, Microelectronics Engineering, Materials Science, or a related technical field.
• Strong analytical and troubleshooting skills with the ability to interpret semiconductor electrical and process data.
• Excellent communication and teamwork skills.
• Ability to manage multiple priorities in a fast-paced manufacturing environment.
• Initiative-taking with strong ownership and problem-solving capabilities.
• 1-3 years of experience in semiconductor manufacturing, device engineering, process engineering, wafer acceptance testing (WAT), or related fields.
• Knowledge of semiconductor device physics and wafer fabrication processes.
• Experience with wafer-level parametric testing, semiconductor characterization, and process monitoring structures.
• Experience with automated semiconductor test equipment and electrical measurement systems.
• Programming experience in Python, C/C , Perl, PHP, MATLAB, JMP Scripting Language (JSL), or similar tools.
• Experience using JMP, Minitab, or comparable statistical analysis software.
• Knowledge of SPC, DOE, Process Capability Analysis, Six Sigma, and continuous improvement methodologies.
• Familiarity with analog, mixed-signal, power management, discrete, or power semiconductor devices.
• Experience developing automation, scripting, or data analytics solutions in a manufacturing environment.

Diodes Incorporated is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.