HMT is a trusted global supplier of high-performance Silicon Carbide (SiC) substrates, enabling breakthroughs in next-generation semiconductors.

Product Offerings:

• Types: Conductive-type and Semi-insulating 4H-SiC wafers.

• Diameters: 2-inch, 4-inch, 6-inch, and 8-inch.
  
  

Application of 4H-SiC Material

New Energy Vehicles: EV Charging Stations

Principle: Fast charging is key to alleviating range anxiety in electric vehicles.

How SiC Contributes:

Enabling High-Frequency & High Efficiency: DC fast chargers are essentially high-power supplies. Using SiC MOSFETs instead of traditional silicon-based IGBTs allows the internal circuits to operate at 5-10 times higher frequencies.

Benefits:

Faster Charging: Higher system efficiency means more energy enters the battery instead of being wasted as heat, supporting higher power output.

Compact Size: Increased frequency allows proportional size reduction of transformers and inductors, making chargers more compact and lightweight.

Cost & Reliability: Although SiC devices are more expensive initially, the reduced costs of passive components and thermal management systems make the overall system cost competitive, with higher reliability.

Summary: In EV charging, SiC is the "fast-charging accelerator," a core technology enabling scenarios like "adding 200 km range in 5 minutes."

Low-Altitude Aviation (eVTOL/Drones)

Principle: Electric Vertical Take-Off and Landing (eVTOL) aircraft have extreme requirements for power density, weight, and reliability, as these directly impact range and safety.

How SiC Contributes:

Lightweighting: Similar to the principle in chargers, SiC's high-frequency and high-efficiency characteristics significantly reduce the weight of the electric drive system (inverters, motor controllers) and power supply systems. For aircraft, weight reduction directly translates to longer flight time and greater payload.

High Reliability: The high-altitude environment involves large temperature variations and challenging cooling conditions. SiC's high-temperature tolerance ensures stable operation of the electric drive system at elevated temperatures, greatly enhancing the safety margin.

Handling High Power Peaks: Aircraft require immense instantaneous power during takeoff and climb. SiC devices excel under such demanding power surges.

Summary: In low-altitude aviation, SiC is a "key enabler for lightweighting and reliability," a foundational technology for turning "flying cars" from concept into reality.

Smart Home Appliances: PFC & Motor Drives

Principle: High-end smart appliances pursue higher energy efficiency, lower standby power, and intelligent variable-frequency motor control.

How SiC Contributes:

Power Factor Correction (PFC) Circuits:

Traditional Challenge: To meet strict energy standards (e.g., 80 PLUS Titanium), PFC circuits must be highly efficient. Traditional silicon devices suffer high losses at high frequencies.

SiC Solution: Using SiC Schottky diodes and MOSFETs in PFC circuits, which have virtually no reverse recovery current and low switching losses, enables conversion efficiency exceeding 99%, making appliances more energy-efficient.

Motor Drives:

Traditional Challenge: Variable-speed drives for compressors in air conditioners and refrigerators primarily use silicon-based IPMs.

SiC Solution: Variable-frequency drives using SiC modules can operate at higher switching frequencies, resulting in smoother motor operation, lower noise, and more precise control. Improved efficiency also directly leads to energy savings.

Summary: In smart home appliances, SiC is the "unsung champion of energy efficiency," making appliances quieter, more energy-efficient, and smarter.

Silicon Carbide (SiC) is penetrating numerous high-tech and green energy fields as a revolutionary foundational material. Its core value lies in empowering entire systems to achieve leaps in "higher efficiency, smaller size, and greater reliability."