CVD Silicon Carbide (SiC) Coating

CVD SiC coating is basically a silicon carbide layer deposited on graphite, and it’s widely used in epitaxy tools where both temperature and cleanliness matter. In real production lines, you’ll often see it in systems from AIXTRON, ASM/LPE, Veeco, as well as some AMAT-related platforms. What makes it useful is not just the temperature resistance, but the overall stability during long runs. Under typical epitaxy conditions — hydrogen, ammonia, or even chlorinated gases — the coating stays relatively stable and protects the graphite underneath. That helps keep the thermal field more consistent and reduces the chance of particles showing up during growth.

Most of the time, the coating is applied to parts like susceptors, wafer carriers, graphite rings, or half-moon components. These are all directly involved in wafer heating or positioning, so any small instability can affect yield. For that reason, coated parts are often treated as consumables that still need to be reliable over multiple cycles, especially in 4 to 12 inch production.