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Silicon carbide is one of the ideal materials for making high-temperature, high-frequency, high-power and high-voltage devices. In order to improve production efficiency and reduce costs, the preparation of large-size silicon carbide substrates is an important development direction.

This blog takes "What is SiC-coated graphite susceptor?" as its theme, and discusses it from the perspectives of Epitaxial layer and its equipment, Importance of SiC coated graphite susceptor in CVD equipment, SiC Coating technology, Market competition and Vetek Semiconductor’s technological innovation.

CVD SiC is a high-purity silicon carbide material manufactured by chemical vapor deposition. It is mainly used for various components and coatings in semiconductor processing equipment. The following content is an introduction to the product classification and core functions of CVD SiC

This article introduces the product characteristics of CVD TaC coating, the process of preparing CVD TaC coating using the CVD method, and the basic method for surface morphology detection of the prepared CVD TaC coating.

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.

SiC-coated graphite combines the machinability and thermal behavior of high-purity graphite with a chemically stable CVD silicon carbide process surface. This technical white paper explains why bare graphite can become a source of chemical interaction, impurities and particles in epitaxy reactors, how CVD SiC creates a more stable process boundary, and why coating integrity, substrate compatibility, geometry and thermal behavior must be engineered together. It also examines the different demands of silicon and SiC epitaxy and outlines how coated susceptors should be specified for semiconductor applications.