China SiC epitaxy crucible Manufacturer, Supplier, Factory

Graphite materials have a wide range of application scenarios. Among them, Isotropic Graphite and Siliconized Graphite are the two main different types of graphite materials, and their characteristics, application scenarios and advantages are significantly different. This blog will conduct a comparative analysis from three aspects: structural characteristics, application scenarios and product advantages.

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 TaC coating almost completely eliminates the carbon encapsulation phenomenon by isolating the direct contact between the graphite crucible and the SiC melt, significantly reducing the defect density of microtubes

This article describes the physical parameters and product characteristics of VeTek Semiconductor's Porous Graphite, as well as its specific applications in semiconductor processing.

In semiconductor high-temperature processes, the handling, supporting, and thermal treatment of wafers rely on a special supporting component—the wafer boat. As process temperatures rise and cleanliness and particle control requirements increase, traditional quartz wafer boats gradually reveal issues such as short service life, high deformation rates, and poor corrosion resistance.

With the development of the solar photovoltaic industry, diffusion furnaces and LPCVD furnaces are the main equipment for the production of solar cells, which directly affect the efficient performance of solar cells. Based on the comprehensive product performance and usage cost, silicon carbide ceramic materials have more advantages in the field of solar cells than quartz materials. The application of silicon carbide ceramic materials in the photovoltaic industry can greatly help photovoltaic enterprises reduce auxiliary material investment costs, improve product quality and competitiveness. The future trend of silicon carbide ceramic materials in the photovoltaic field is mainly towards higher purity, stronger load-bearing capacity, higher loading capacity, and lower cost.