Silicon carbide (SiC) substrates are the “foundation” of power devices and RF devices — the flatness, purity, and defect density of that foundation directly determine what kind of “building” can be constructed on top of it.
Silicon carbide (SiC) single-crystal growth and epitaxy typically run at furnace temperatures above 1500°C, with reactive gases such as hydrogen, hydrogen chloride, and silane flowing through the chamber. Graphite is the standard structural material inside these furnaces — it conducts heat well, machines easily, and costs relatively little. But it has one clear weakness: under prolonged exposure to high temperature and corrosive atmospheres, graphite gradually erodes, and the resulting carbon particles contaminate the crystal or epitaxial layer growing nearby.
When people hear Silicon Carbide (SiC), they often think it’s just one material. In fact, that’s not true.
There are several types of SiC, and each is made in a different way. Because of that, they have different strengths, different prices, and different applications.
So, choosing the right SiC grade is just as important as choosing the right material.
In semiconductor manufacturing, aluminum nitride (AlN) is a crucial functional material. Due to its high thermal conductivity, excellent insulation properties, wide bandgap (approximately 6.2 eV), high breakdown electric field, and superior thermal stability, AlN finds extensive applications in GaN LEDs, power devices, RF filters (SAW/BAW), MEMS, and ultraviolet detectors.
Carbon Fiber Composite (CFC) protective plate is designed to act as a sacrificial protective barrier inside the thermal field. Rather than generating heat or bearing major structural loads, it shields critical components from particles, airflow erosion, accidental mechanical contact, and excessive thermal radiation, helping to maintain a stable operating environment throughout repeated high-temperature cycles.
The CFC heating element, as the name suggests, generates heat through electrical current and directly serves as the “core heat source” within the thermal field.
The key difference between a CFC heating element and a conventional CFC component lies in the fact that it must not only meet structural requirements but also fulfill electrical heating functionality.
In industries such as semiconductors, photovoltaics, silicon carbide crystal growth, and high-temperature sintering, CFC (Carbon Fiber Composite) top plates are critical thermal field components. Many customers often wonder why these plates contain multiple holes of different sizes.
In fact, these holes are not merely machining features; they are an essential part of thermal field engineering.
