7N High-Purity CVD SiC raw material

1. Core Performance Factors

• 7N Grade Purity: We maintain a consistent purity of 99.99999% (7N), keeping metallic impurities at ppb levels. This is essential for growing high-resistivity semi-insulating (HPSI) crystals and ensuring zero contamination in power or RF applications.
• Structural Stability vs. C-Dust: Unlike traditional powders that tend to collapse or release fines during sublimation, our large-grain CVD bulk remains structurally stable. This prevents carbon dust (C-dust) migration into the growth zone—the leading cause of crystal inclusions and micro-pipe defects..
• Optimized Growth Kinetics: Designed for industrial-scale manufacturing, this source supports growth rates up to 1.46 mm/h. This represents a 2x to 3x improvement over the 0.3–0.8 mm/h typically achieved with conventional powder-based methods.
• Thermal Gradient Management: The high bulk density and specific geometry of our blocks create a more aggressive temperature gradient within the crucible. This promotes a balanced release of Silicon and Carbon vapors, mitigating the "Si-rich early / C-rich late" fluctuations that plague standard processes.
• Crucible Loading Optimization: Our material allows for a 2kg+ increase in loading capacity for 8-inch crucibles compared to powder methods. This enables the growth of longer ingots per cycle, directly improving the post-production yield rate toward 100%.

1. Technical Specifications

Comparison: Traditional Powder vs. VETEK CVD Bulk