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Silicon Pulling Quartz Crucibles
Silicon Pulling Quartz Crucibles are indispensable consumables used in the Czochralski (CZ) crystal growth process, the world's dominant technology for manufacturing semiconductor-grade single crystal silicon ingots. Manufactured from ultra-high purity fused quartz (SiO₂), these crucibles are specifically engineered to withstand prolonged operation at temperatures exceeding 1,420°C while maintaining exceptional chemical purity, thermal stability, and dimensional integrity.
Description
Designed for 200 mm and 300 mm CZ crystal growth systems, Semixlab semiconductor-grade quartz crucibles are widely utilized in the production of silicon wafers for advanced logic devices, memory chips, power semiconductors, and other high-performance electronic applications.
Material Characteristics
Ultra-High Purity Fused Quartz:
Silicon pulling crucibles are manufactured from semiconductor-grade fused quartz with SiO₂ purity typically exceeding 99.9999% (6N), while premium grades may reach 7N–8N purity levels.
Outstanding High-Temperature Resistance:
During CZ crystal growth, molten silicon is maintained at approximately 1,420–1,450°C. Fused quartz offers exceptional thermal stability with a softening point around 1,700°C, allowing the crucible to maintain structural integrity throughout long crystal pulling cycles.
Low Thermal Expansion:
Fused quartz exhibits an extremely low coefficient of thermal expansion (approximately 0.5 × 10⁻⁶/K), significantly lower than most ceramic materials.
Roles in CZ Single Crystal Silicon Growth
Quartz crucibles are essential process components that directly influence crystal quality throughout the CZ growth process.
1. Containing Molten Silicon
The crucible holds hundreds of kilograms of molten polysilicon during crystal pulling, providing a stable environment for continuous growth of large-diameter single crystal silicon ingots.
2. Oxygen Concentration Control
One of the most important functions of the quartz crucible is regulating oxygen incorporation into the growing crystal. Controlled oxygen concentration contributes to:
● Improved mechanical strength
● Reduced dislocation propagation
● Enhanced internal gettering capability
● Better wafer processability
3. Thermal Field Stabilization
The crucible's geometry, wall thickness, and thermal characteristics significantly influence:
● Heat transfer
● Melt convection
● Temperature gradients
● Solid-liquid interface stability
Why Choose Semixlab?
Semixlab semiconductor-grade quartz crucibles are manufactured using premium fused quartz materials and advanced forming technologies to deliver exceptional purity, thermal performance, and process consistency. Every crucible is engineered to support stable oxygen control, minimize contamination, and maximize crystal yield in demanding CZ crystal growth environments. We sincerely hope to become your long-term partner in China.
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