TaC Coated Pedestal support Plate

At Semixlab Technology, we recognize that the pedestal support plate serves as one of the most critical structural and thermal components within advanced semiconductor process chambers. In high-temperature environments such as epitaxy, CVD, and plasma etching systems, the pedestal not only supports the wafer or susceptor mechanically, but also plays a decisive role in ensuring precise thermal uniformity, stable chemical performance, and process repeatability across each production cycle.

Engineered with high-purity graphite materials and coated with advanced functional layers such as Tantalum Carbide (TaC), the pedestal support plate acts as a stable thermal interface between the heating module and the wafer. This configuration enables uniform heat distribution across the entire wafer surface—an essential factor for achieving consistent film growth rates, controlled dopant profiles, and minimal defect density in epitaxial or deposition processes. The high thermal conductivity of the base structure, combined with the superior chemical inertness of the TaC coating, ensures that the platform remains dimensionally stable and corrosion-resistant even under repeated thermal cycling at temperatures exceeding 1200°C.

Beyond thermal management, the pedestal support plate also functions as a critical contamination control element. During plasma etching and CVD operations, the chamber environment often involves reactive gases such as chlorine, fluorine, or silane. These species can aggressively attack unprotected surfaces, generating unwanted by-products or particles that compromise wafer yield. By integrating a dense and uniform TaC coating, Semixlab’s pedestal solution prevents material degradation and particle shedding, thereby maintaining a clean process interface and extending the overall service life of the hardware.

Furthermore, the precise flatness and mechanical integrity of the support plate guarantee stable wafer positioning and uniform process spacing—factors that directly influence gas flow dynamics, plasma distribution, and thermal balance. Semixlab’s advanced surface finishing and coating uniformity control technologies allow the pedestal to maintain sub-micron planarity and surface roughness levels below Ra 0.2 μm, effectively minimizing micro-defects and film non-uniformities during high-precision manufacturing.

In essence, the pedestal support plate is not merely a mechanical fixture—it is a core enabler of process performance and reliability. Through optimized thermal design, superior coating technology, and rigorous material selection, Semixlab Technology delivers pedestal assemblies that support next-generation semiconductor manufacturing nodes, from wide-bandgap materials like SiC and GaN to advanced silicon epitaxy applications.