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About the Role

T1 Energy is seeking a Thermal Process Engineer to support the process development and ramp of their G2 solar cell fab. This hands-on role involves owning critical doping thermal processes that impact cell efficiency, yield, and throughput, working at the leading edge of solar cell fabrication.

Responsibilities

• Support thermal doping process integration across the G2 solar cell fab, working closely with equipment, facility, quality, and yield engineering teams.
• Drive process characterization, DOE execution, and data analysis to improve dopant uniformities and throughput.
• Troubleshoot process excursions and equipment issues on diffusion tools and sub-inspection modules, identifying root causes and implementing corrective actions.
• Collaborate with equipment engineers and tool vendors to qualify new tool integrations, execute preventive maintenance reviews, and maintain process baselines.
• Develop and maintain detailed process documentation, including recipes, SOPs, and control plans.
• Optimize process performance through statistical process control (SPC) and lead OEM work inspection development integration with urgency.
• Support technology transfer from development to high-volume manufacturing, ensuring processes are robust, repeatable, and scalable.
• Partner with cross-functional teams including core equipment engineering, material procurement, and manufacturing operations to meet cell efficiency and production targets.

Requirements

• Experienced working in a clean room setting.
• Strong understanding of thermodynamics, transport phenomenon, 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; especially considering an application in photon-electron interfaces.
• Experienced with III-V, GaAs, PERC, TOPCon or other silicon based solar cells.
• Data-driven approach to process development and troubleshooting.
• Able to work effectively in a fast-moving fab environment where priorities shift and deadlines are real.
• Strong collaborator who can work across engineering disciplines and communicate technical findings clearly to varied audiences.
• Energized by the challenge of building something new and scaling it to high-volume production.
• 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 for process monitoring and optimization.
• Strong documentation skills and experience reviewing P&IDs, leading change order processes, writing SOPs, process specs, and engineering reports.
• Ability to support a fab environment, including occasional travel to the G2 facility as needed.

Skills

• Diffusion toolsets
• Boron diffusion processes
• Phosphorous diffusion processes
• Process integration
• Process characterization
• DOE execution
• Data analysis
• Root cause analysis
• Corrective actions
• Tool qualification
• Preventive maintenance
• Process documentation
• SOPs
• Control plans
• Statistical Process Control (SPC)
• Technology transfer
• High-volume manufacturing
• Thermodynamics
• Transport phenomenon
• Vacuum systems
• Electron-hole physics
• Hall effect
• Thin film characteristics
• High temperature processing
• Silicon processing
• Glass processing
• Chemical characterization
• Crystal lattice chemistry
• Quantum field effects
• Oxidation/reduction principles
• Photon-electron interfaces
• III-V materials
• GaAs materials
• PERC technology
• TOPCon technology
• Silicon based solar cells
• Python
• SQL
• JMP
• Excel
• P&ID review
• Change order processes
• Process specifications
• Engineering reports

Location

• Wilmer, Texas

Work Type

• Full-time

Experience Level

• 5+ years of process engineering experience

Education Level

• Bachelor's degree or higher in Chemical Engineering, Materials Science, Electrical Engineering, Physics, or a related field

About the Company

• T1 Energy is bringing solar manufacturing back to the U.S. by building a domestic solar supply chain.
• Our mission is to invigorate America with scalable, reliable, and low-cost energy.
• Our fully operational 5GW solar module facility in Wilmer, Texas, can manufacture more than 20,000 modules every 24 hours.
• We're focused on building advanced American manufacturing and we're passionate about engineering a better future filled with abundant energy.
• We move fast, expect accountability, and treat people with respect.
• We have a no-jerks policy: we don't tolerate big egos, bad behavior or "that's not my job attitude".
• Be sharp, be honest, be human.

Equal Opportunity

• T1 Energy is an Equal Opportunity Employer.
• We are committed to creating an inclusive environment for all employees and applicants and do not discriminate on the basis of any legally protected characteristics.