Photolithography Process Engineer

• Develop, optimize, and maintain photolithography processes for InP wafer fabrication.
• Support production using i-line, DUV, electron beam lithography, contact aligners, and coat/develop systems.
• Develop, optimize, and maintain production recipes while supporting automated recipe download, recipe verification, and process standardization.
• Troubleshoot process issues and identify root causes to improve yield and product performance.
• Design and execute experiments to improve lithography performance, process capability, and manufacturability.
• Monitor and optimize critical process metrics, including CD, overlay performance, and tool-specific process parameters.
• Monitor equipment health and process performance using SPC, fault detection, and equipment data to identify trends and prevent process excursions.
• Work with cross-functional teams to ensure successful integration of lithography with etch, deposition, and other manufacturing processes.
• Partner with equipment, automation, and manufacturing engineers to improve equipment reliability, recipe control, and overall process capability.
• Analyze process data using SPC and statistical software to maintain stable, capable processes.
• Develop process documentation, operating procedures, engineering reports, and process specifications.
• Support equipment qualifications, process transfers, and new product introductions.
• Mentor technicians and junior engineers as needed.

• Bachelor's degree in Engineering, Materials Science, Physics, or a related technical field.
• At least 5 years of semiconductor photolithography process engineering experience.

• Experience processing GaAs and/or InP wafers in a manufacturing environment.
• Hands-on experience as a process owner and/or equipment owner for i-line, DUV, contact aligner, or electron beam lithography systems.
• Strong understanding of photolithography fundamentals, including resist processing, focus and exposure optimization, alignment strategies, and process window development.
• Experience using CD and overlay metrology to monitor and improve lithography performance.
• Experience with MES, SECS/GEM, recipe download, or factory automation systems.
• Experience with fault detection and classification (FDC), advanced process control (APC), or equipment health monitoring.
• Familiarity with DOE, SPC, and process capability analysis.
• Proficiency creating database queries, automated reports, or data analysis tools using JMP, Minitab, Excel, SQL, Python, or similar software.
• Demonstrated ability to manage multiple projects and priorities in a fast-paced manufacturing environment.
• Strong analytical and troubleshooting skills with the ability to solve complex manufacturing problems.
• Excellent communication skills and the ability to work effectively with cross-functional teams.

• Will be exposed to areas where hand tools and power tools are being operated
• Will be exposed to areas where hazardous chemicals or gases are stored
• Ability to work in a cleanroom environment per semi-conductor protocol/requirements

• Work in a class 100/1000 clean room for extended periods
• Wear full cleanroom attire (smock, mask, etc.)
• Work with and/or around chemicals (such as solids and acids)
• Stand for up to 4 hours at a time
• Lift up to 16-30 Pounds
• Push/Pull up to 16-30 pounds
• Sit for up to 4 hours at a time

All employees are required to follow the site EHS procedures and Coherent Corp.

Corporate EHS standards.

Depending on location, this position may be responsible for the execution and maintenance of the ISO 9000, 9001, 14001 and/or other applicable standards that may apply to the relevant roles and responsibilities within the Quality Management System and Environmental Management System.

Ensure adherence to company’s values (ICARE) in all aspects of your position at Coherent Corp.:

I ntegrity – Create an Environment of Trust

C ollaboration – Innovate Through the Sharing of Ideas

A ccountability – Own the Process and the Outcome

R espect – Recognize the Value in Everyone

E nthusiasm – Find a Sense of Purpose in Work

Coherent Corp. is an equal opportunity/affirmative action employer.

All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.