Senior Diffusion Process Engineer
- 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.
- Experienced working in a clean room setting.
- Driven by a 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 in your approach to process development and troubleshooting — you let the numbers lead.
- Able to work effectively in a fast-moving fab environment where priorities shift and deadlines are real.
- A 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.
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