SiC Ceramic Graphite Heater

Semixlab SiC Ceramic Graphite Heater is a high-performance heating element engineered for extreme-temperature environments in advanced semiconductor manufacturing. Constructed from a robust composite of silicon carbide (SiC) ceramic coating and high-purity graphite, this heater offers superior thermal conductivity, chemical stability, and mechanical durability—making it an ideal solution for thermal processes in wafer fabrication.

Material Composition and Key Physical Properties

●Core Material: High-density, fine-grained isostatic graphite

●Coating Material: Chemically vapor deposited (CVD) silicon carbide (SiC)

●Surface Hardness: ≥ 2500 HV

●Thermal Conductivity: ~120–150 W/m·K (graphite core)

●Operating Temperature: Up to 1500°C in vacuum or inert gas atmosphere

●Oxidation Resistance: Excellent in controlled environments due to the protective SiC layer

●Electrical Conductivity: Tailored resistance for uniform heating and power efficiency

●Corrosion Resistance: High resistance to corrosive gases and process chemicals (e.g., HCl, HF)

This composite design leverages the thermal uniformity of graphite and the chemical robustness of SiC, ensuring long-term reliability under harsh thermal cycling conditions.

Application of SiC ceramic graphite heaters

SiC ceramic graphite heaters play an irreplaceable role in multiple key process links of semiconductor manufacturing, and their high-performance characteristics are directly related to the quality, performance and production efficiency of semiconductor devices.

1. Thin film deposition (PVD/CVD/ALD): In thin film growth processes such as physical vapor deposition (PVD), chemical vapor deposition (CVD) and atomic layer deposition (ALD), SiC ceramic graphite heaters provide a stable and uniform high-temperature environment. This is crucial for controlling the growth rate, crystal structure, uniformity and purity of the film, and directly affects the electrical properties of the device.

2. Ion implantation annealing: After ion implantation, damage will form inside the wafer and activate dopants. SiC ceramic graphite heaters are used in high-temperature annealing processes to help repair lattice damage, activate doping atoms, and optimize doping distribution to ensure the electrical performance and reliability of the device.

3. Diffusion process: In the diffusion furnace, SiC ceramic graphite heaters
are used to provide precise and stable high temperatures to promote the diffusion of doping atoms in the silicon wafer to form P-type or N-type regions, thereby constructing the structure of various semiconductor devices.

4. Epitaxial growth: Epitaxial growth is a key step in the growth of high-quality semiconductor layers. SiC ceramic graphite heaters can provide precise thermal control to ensure lattice matching between the epitaxial layer and the substrate, reduce defects, and improve the uniformity and purity of the epitaxial layer.

5. Post-etching cleaning and drying: In some post-etching cleaning and drying steps, appropriate heating is required to accelerate solvent evaporation or heat treatment. The corrosion resistance and high purity of SiC ceramic graphite heaters make it an ideal choice to avoid secondary contamination.

6. Wafer thermal treatment: At various stages of semiconductor manufacturing, wafers require various thermal treatments to optimize material properties, relieve stress, or activate functional layers. SiC ceramic graphite heaters meet these stringent thermal treatment requirements with their fast response and precise temperature control capabilities.

Semixlab is committed to providing high-quality SiC ceramic graphite heater products for semiconductor processes to meet your unique needs in the field of semiconductor manufacturing. Choosing our SiC ceramic graphite heater means choosing a higher process yield, a longer equipment operation cycle and a more stable production process. We sincerely look forward to becoming your long-term partner in China.