Senior CZ Silicon Crystal Growth Engineer

Role Overview

The Senior CZ Silicon Crystal Growth Engineer will serve as the site’s technical authority for Czochralski (CZ) silicon crystal growth in a high-volume solar ingot manufacturing facility. The role combines floor-level process mastery with engineering rigor, working side by side with operators, technicians, maintenance, and engineering teams to stabilize and optimize puller performance.

What You Will Do

Key responsibilities include providing technical leadership and final escalation support for puller, hot-zone, process, and crystal-quality issues, owning and optimizing CZ recipes, operating windows, process controls, SOPs, setup procedures, control plans, and reaction plans across the full crystal-growth cycle.

Why It Might Be a Fit

The ideal candidate will have 10+ years of hands-on experience in CZ silicon crystal growth, preferably in solar or semiconductor silicon manufacturing, and demonstrated expertise with monocrystalline CZ pullers, including large-diameter ingot production in a high-volume environment.

Requirements

• Bachelor’s degree in Materials Science, Chemical, Mechanical or Manufacturing Engineering, Physics or a related technical discipline
• 10+ years of hands-on experience in CZ silicon crystal growth
• Demonstrated expertise with monocrystalline CZ pullers
• Proven ability to independently troubleshoot and optimize recipes, furnace behavior, hot-zone performance, diameter control, thermal profiles, and growth stability on the manufacturing floor
• Strong knowledge of crystal-growth fundamentals: thermal gradients, melt dynamics, solidification, doping, defect formation, impurity control, and crystal-quality drivers
• Practical understanding of furnace controls and high-temperature materials behavior (graphite, quartz, insulation)
• Demonstrated success improving ingot yield, usable length, quality, resistivity consistency, furnace productivity, uptime, consumable life, or manufacturing cost
• Experience with structured problem-solving and statistical methods such as DOE, SPC, FMEA, 8D/A3, root-cause analysis, and corrective/preventive action
• Experience interpreting furnace data, alarm histories, ingot-inspection results, resistivity/lifetime measurements, and downstream wafer feedback
• Strong leadership, mentoring, and cross-functional collaboration skills; excellent written and verbal communication
• Ability and willingness to work on the production floor for the majority of the workday

Benefits

• 100% company-paid pension benefit
• Matching contributions to 401(k) savings plan
• Company-paid life insurance
• Disability benefits
• Disease management programs
• Paid parental leave
• Family building support
• Fitness benefits
• Employee Assistance Program (EAP)
• Recognition program to celebrate successes and reward colleagues