Senior Diffusion Process Engineer

The role

This person will support thermal doping process integration and process development for the G2 solar cell fab. They will drive process characterization, troubleshoot equipment issues, and optimize performance through statistical process control.

What you will do

• Support thermal doping process integration across the G2 solar cell fab
• Drive process characterization, design of experiments (DOE) execution, and data analysis
• Troubleshoot process excursions and equipment issues on diffusion tools and sub-inspection modules
• Collaborate with equipment engineers and tool vendors to qualify new tool integrations
• Develop and maintain detailed process documentation, including recipes, SOPs, and control plans
• Optimize process performance through statistical process control (SPC)
• Support technology transfer from development to high-volume manufacturing
• Partner with cross-functional teams to meet cell efficiency and production targets

Required qualifications

• Bachelor's degree or higher in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or a related field
• 5+ years of process engineering experience in semiconductor, photovoltaic, or advanced manufacturing environments
• Hands-on experience with high-temperature diffusion toolsets
• Strong working knowledge of ion implantation processes and diffusion thermal tools
• Experience with DOE methodology, statistical process control (SPC), micron-level physical inspection, and optical/electrical characterization
• Proficiency with Python, SQL, JMP, and Excel
• Strong documentation skills and experience reviewing P&IDs, leading change order processes, writing SOPs, process specs, and engineering reports
• Experienced working in a cleanroom setting
• Understanding of thermodynamics, transport phenomena, vacuum systems, electron-hole physics (Hall effect), and thin film characteristics
• Deep experience working with high-temperature (500 °C+) high-volume manufacturing equipment with silicon or glass material inputs
• Comfortable with chemical characterization, including crystal lattice chemistry, quantum field effects, and the principles of oxidation/reduction in gaseous environments
• Able to work effectively in a fast-moving fab environment

Nice to have

• Experienced with III-V, GaAs, PERC, TOPCon, or other silicon-based solar cells

About the company

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