4H-Superior SiC Wafer High Performance

4H-SiC Wafer Manufacturers, HMT offering conductive N-type SiC substrates in 4 inch, 6 inch, and 8 inch diameters with resistivity ranging from 0.015 to 0.028 ohm.cm, supply the foundational material that enables these superior characteristics. Among the performance dimensions of semiconductor materials, high voltage and high temperature tolerance are key indicators for assessing their ability to operate stably under extreme working conditions.

SiC demonstrates exceptional performance in these aspects, far surpassing that of the first two generations of semiconductors. In terms of key parameters, the breakdown electric field strength of silicon carbide is approximately 10 times that of silicon, enabling it to withstand higher voltages without breakdown. In high-voltage power grids, traditional silicon-based semiconductor devices are prone to issues such as increased leakage current and device failure under high voltage. In contrast, silicon carbide devices, leveraging their high breakdown electric field strength, can stably perform power conversion and transmission, significantly enhancing the reliability and stability of power grids.


Regarding high-temperature tolerance, SiC also excels, with a maximum operating temperature of up to 600°C, far exceeding the 150°C limit of silicon. This advantage makes silicon carbide particularly valuable in the aerospace industry. During operation, aircraft engines generate extremely high temperatures, under which traditional semiconductor materials experience severe performance degradation or even failure. Silicon carbide devices, however, maintain stable performance at high temperatures, ensuring the normal operation of aviation electronic equipment and providing reliable support for aircraft safety. Additionally, silicon carbide exhibits strong chemical stability, enabling it to resist corrosion from acids, alkalis, and other chemical substances. This makes it highly useful in industrial fields such as chemical and petroleum industries, where highly corrosive environments are common.

In terms of energy conversion efficiency, SiC performs exceptionally well. Taking new energy vehicles as an example, under the same specifications, the total energy loss of silicon carbide MOSFETs is only 30% that of silicon-based IGBTs. This means that electric vehicles using silicon carbide devices experience less energy loss during power conversion, allowing more electrical energy to be converted into mechanical energy and directly contributing to a 10% increase in the range of new energy vehicles. In the field of photovoltaic inverters, the application of silicon carbide devices has enabled conversion efficiency to exceed 99%, greatly improving solar energy utilization and reducing energy waste.


High Thermal Conductivity: The "Core Driver" of Device Miniaturization

In modern electronic devices, heat dissipation has always been a key factor limiting device performance and miniaturization. Silicon carbide, with its excellent thermal conductivity, provides an effective solution to this challenge. The thermal conductivity of silicon carbide is approximately 2–3 times that of copper and over twice that of silicon, giving it outstanding heat dissipation capabilities. During the operation of electronic devices, a significant amount of heat is generated. If this heat is not dissipated in time, it can lead to overheating, performance degradation, or even device failure. Silicon carbide devices can quickly dissipate heat, maintaining a stable operating temperature without the need for complex cooling systems.

This advantage is particularly important for the development of new energy vehicles and 5G base stations. In new energy vehicles, the use of silicon carbide-based power devices can significantly reduce the size of components, with silicon carbide-based MOSFETs of the same specifications being only one-tenth the size of their silicon-based counterparts. This not only contributes to the lightweight design of vehicles and improves energy efficiency but also saves more interior space for other equipment. In 5G base stations, the application of silicon carbide has greatly reduced their volume and weight, facilitating installation and maintenance while also lowering construction costs.