Tantalum Carbide (TaC) Coated Porous Graphite for SiC Crystal Growth

VeTek Semiconductor Tantalum Carbide Coated Porous Graphite is engineered to optimize the SiC crystal growth environment through four core technical functions:

● Vapor Component Filtration: The precise porous structure acts as a high-purity filter, ensuring only desired vapor phases contribute to crystal formation, thereby improving overall purity.

● Precision Temperature Control: The TaC coating enhances thermal stability and conductivity, allowing for more accurate adjustments of local temperature gradients and better control over growth rates.

● Guided Flow Direction: The structural design facilitates a guided flow of substances, ensuring materials are delivered exactly where needed to promote uniform growth.

● Effective Leakage Control: Our product provides excellent sealing properties to maintain the integrity and stability of the growth atmosphere.

Physical properties of TaC coating

Comparison with Traditional Graphite

Tantalum carbide (TaC) coating on a microscopic cross-section

Application Impact: Defect Minimization in PVT Process

In the PVT (Physical Vapor Transport) process, replacing conventional graphite with VeTek’s TaC Coated Porous Graphite directly addresses the common defects shown in the diagram:

● Eliminating Carbon Inclusions: By acting as a barrier to solid particles, it effectively eliminates carbon inclusions and reduces micropipes common in traditional crucibles.

● Preserving Structural Integrity: It prevents the formation of etch pits and microtubules during long-cycle SiC single crystal growth.

● Higher Yield & Quality: Compared to traditional materials, the TaC coated components ensure a cleaner growth environment, resulting in significantly higher crystal quality and production yield.