China SiC Coated Epitaxy Susceptor Manufacturer, Supplier, Factory

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

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This blog takes "How Porous Graphite Enhances Silicon Carbide Crystal Growth?" as its theme, and discusses in detail Porous Graphite Key Takeaways, The Role of Silicon Carbide in Semiconductor Technology, Unique Properties of Porous Graphite, How Porous Graphite Optimizes the PVT Process, Innovations in Porous Graphite Materials and other angles.

​In the silicon carbide (SiC) PVT crystal growth process, the stability and uniformity of the thermal field directly determine the crystal growth rate, defect density, and material uniformity. As the system boundary, thermal-field components exhibit surface thermophysical properties whose slight fluctuations are dramatically amplified under high-temperature conditions, ultimately leading to instability at the growth interface.

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 methods for growing SiC single crystals are: physical vapor transport (PVT), high temperature chemical vapor deposition (HTCVD) and high temperature solution growth (HTSG).