Manufacturing Device / Wafer Acceptance Test (WAT) Engineer

Cie Dfw; Portland, Northern (ME, KY); Hybrid; USD 83,000 - 112,000; Full time

Benefits offered by this job

Medical

Dental

Vision

FSA

401k match

Disability insurance

Life insurance

Paid time off

Wellness program

Job summary

Diodes Incorporated is seeking a Manufacturing Device / Wafer Acceptance Test (WAT) Engineer in South Portland, ME. You will develop and optimize WAT programs, analyze wafer data, and drive improvements in yield and device reliability.

The role involves collaborating with Technology Development, Process, Quality, and Manufacturing teams to implement automated test solutions and support new technologies. A strong background in semiconductor testing and data analytics is essential.

Qualifications

• Bachelor's degree or higher in Electrical Engineering, Computer Engineering, Physics, Microelectronics Engineering, Materials Science, or related field.
• Experience in semiconductor manufacturing, device engineering, wafer acceptance testing (WAT) or process engineering is a plus.
• Strong analytical and troubleshooting skills with ability to interpret semiconductor data.

Responsibilities

• Develop, qualify, maintain, and optimize Wafer Acceptance Test (WAT) and device characterization programs using HP4062 and related test platforms.
• Analyze wafer-level parametric data and device electrical characteristics to identify process excursions and yield issues.
• Troubleshoot device, process, and test-related issues and implement corrective actions.
• Apply SPC, DOE, Six Sigma, 8D, and Root Cause Analysis to improve manufacturing performance.
• Monitor and improve yield and process capability (CPK) as well as electrical performance.
• Support technology development, process evaluations, product characterization, and NPI activities.
• Develop automation, data analysis methods, and software tools to boost productivity.
• Collaborate cross-functionally to drive quality, cost reduction, and operational excellence.
• Prepare technical reports and present findings to stakeholders and management.

Skills

Analytical skills

Troubleshooting

Statistical methods

Cross-functional collaboration

Data analysis

Education

Bachelor's degree in Electrical Engineering or related field

Tools

HP4062 parametric test system

Keithley/Tektronix 4200

Signatone probe station

Programming in C/PHP/Perl

SAS JMP / Exensio / Yield Hub

Job description

Manufacturing Device / Wafer Acceptance Test (WAT) Engineer

Regular Full-Time South Portland, ME, US

Life at Diodes

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

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.

Location

South Portland

Compensation

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.

Benefits Summary

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.

About the Role

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.

What You’ll Do

• Develop, qualify, maintain, and optimize Wafer Acceptance Test (WAT) and device characterization programs using HP4062 and related semiconductor test platforms.
• 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.

Tool You'll Use

• HP4062 parametric test system with TEL P8XL automated probers
• Custom Built Electrical Testers
• Keithley /Tektronix 4200 with Signatone manual probe station
• C, PHP, Perl, HP RMB programing
• SAS JMP, Pdf Solutions Exensio, Yield Hub Yield Management Systems

What You’ll Gain

• Build strong connections through networking and mentoring with members of Diodes’ highly skilled workforce
• Collaboration and exposure to a global team and resources
• Gain Practical, project-based experience that strengthens your technical and professional skills.

Who You Are

• 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.