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During the SiC epitaxial growth process, SiC coated graphite suspension failure may occur. This paper conducts a rigorous analysis of the failure phenomenon of SiC coated graphite suspension, which mainly includes two factors: SiC epitaxial gas failure and SiC coating failure.

There are many types of measurement equipment in the Fab factory. Common equipment includes lithography process measurement equipment, etching process measurement equipment, thin film deposition process measurement equipment, doping process measurement equipment, CMP process measurement equipment, wafer particle detection equipment and other measurement equipment.

In the process of growing silicon carbide (SiC) crystals via the Physical Vapor Transport (PVT) method, the extreme high temperature of 2000–2500 °C is a “double-edged sword” — while it drives the sublimation and transport of source materials, it also dramatically intensifies impurity release from all materials within the thermal field system, especially trace metallic elements contained in conventional graphite hot-zone components. Once these impurities enter the growth interface, they will directly damage the core quality of the crystal. This is the fundamental reason why tantalum carbide (TaC) coatings have become a “mandatory option” rather than an “optional choice” for PVT crystal growth.

The main difference between epitaxy and atomic layer deposition (ALD) lies in their film growth mechanisms and operating conditions. Epitaxy refers to the process of growing a crystalline thin film on a crystalline substrate with a specific orientation relationship, maintaining the same or similar crystal structure. In contrast, ALD is a deposition technique that involves exposing a substrate to different chemical precursors in sequence to form a thin film one atomic layer at a time.

A CVD TaC Coating Cover is not just a protective lid or coated graphite component. In high-temperature semiconductor processes, it can influence chamber cleanliness, thermal stability, part lifetime, and process consistency.

Discover how CVD TaC coating improves SiC crystal growth in PVT furnaces by reducing carbon contamination, protecting graphite components, extending service life, and enhancing crystal quality for advanced semiconductor manufacturing.