Senior Process Engineer, Wet Etch

The role

This person will develop, qualify, and own wet chemical processes used to manufacture TOPCon solar cells at scale. They will apply a physics-based approach to process development and drive cell efficiency and yield improvement.

What you will do

• Develop, qualify, and own wet processes for TOPCon cell manufacturing
• Own bath chemistry, concentration control, temperature management, dosing, and bath life
• Optimize BSG, PSG, and polysilicon wrap-around removal, texture quality, reflectance, and surface cleanliness
• Qualify inline and batch wet process tools from installation through production readiness
• Lead root cause analysis for yield excursions and efficiency losses
• Establish inline metrology and control strategies
• Support 24/7 manufacturing operations through rotations and on-call availability
• Drive next-generation wet chemistry formulations, additives, and process development

Required qualifications

• Degree in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or a related technical field, or equivalent experience
• 5+ years of hands-on wet process engineering experience in solar cell or semiconductor manufacturing
• Deep experience with wet process development, tool qualification, and establishing process baselines and control plans in high-volume manufacturing
• Working knowledge of texturing, cleaning, and etch chemistries and their impact on surface passivation, lifetime, and cell efficiency
• Proficiency with wet process metrology, including reflectance, film thickness, particle and defect inspection, lifetime measurement, and surface analysis techniques
• Strong Design of Experiments skills and statistical analysis capability
• Experience handling hazardous chemicals safely

Nice to have

• TOPCon or other high-efficiency cell technologies

About the company

T1 Energy is an American solar manufacturer building a domestic solar supply chain. They operate manufacturing facilities in Wilmer, Texas and Rockdale, Texas.