2inch N-type 6H polytype Silicon Carbide substrate optoelectronics Gallium nitride growth

Product Description

This 2-inch (50.8 mm) 6H-polytype, N-type Silicon Carbide wafer is a high-performance semiconductor substrate engineered for advanced research and specialized electronic applications. Leveraging a wide bandgap of approximately 3.02 eV, this wafer provides superior thermal conductivity and high-breakdown field strength compared to traditional silicon.

Doped with Nitrogen to achieve consistent N-type conductivity, it features a typical resistivity range of 0.030–0.080 Ohm-cm. The substrate is precision-polished via Chemical Mechanical Polishing on the Silicon-face to an atomic-scale roughness (Ra < 0.5 nm), ensuring an ideal surface for epitaxial growth. Standardized at a 330um thickness with a primary flat oriented to the <1010> plane, it is an essential tool for developing UV sensors, high-temperature electronics, and GaN-on-SiC power components. 

Features:

1. Wide Bandgap
The 6H-polytype provides a robust bandgap of 3.02 eV, significantly outperforming traditional silicon in high-voltage and high-temperature environments. This physical property allows the material to maintain structural and electrical integrity under extreme thermal stress, making it an ideal substrate for specialized UV-optoelectronics and radiation-hardened sensors that require long-term stability.

2. Precision Surface polishing

Each wafer undergoes a rigorous Chemical Mechanical Polishing process, resulting in a silicon side with atomic-level smoothness (Ra < 0.5 nm). This pristine surface finish is critical for high-yield epitaxial growth, minimizing lattice mismatches and defect propagation when depositing gallium nitride or additional silicon carbide layers for device fabrication.

3. Excellent Thermal conductivity

With a thermal conductivity reaching up to 4.9 W/cm·K, this N-type substrate acts as a highly efficient heat spreader. By moving thermal energy away from the active device layers three times faster than silicon, it enables higher power densities and reduces the size and weight of cooling systems in compact power modules.

Applications:

Power Electronics and Energy Conversion

The 2-inch 6H N-type Silicon Carbide wafer serves as a foundational building block for advanced power electronics, particularly in sectors requiring high-efficiency energy conversion. Due to its wide bandgap and high thermal conductivity, it is utilized to develop Schottky barrier diodes and power MOSFETs that operate far beyond the thermal limits of traditional silicon. These components are essential for reducing energy losses in industrial motor drives, solar inverters, and power supplies. By enabling higher switching frequencies, this wafer helps engineers design smaller, lighter, and more efficient power modules, ultimately driving the transition toward greener energy systems and more reliable high-voltage grid infrastructures across various global industrial applications.

Optoelectronics and UV Sensing Technology

In the realm of optoelectronics, 6H-SiC is a premier substrate choice for high-performance ultraviolet (UV) light detection and specialized LED fabrication. Its unique electronic structure makes it naturally "blind" to visible light while remaining highly sensitive to the UV spectrum, which is critical for flame detection, missile warning systems, and environmental monitoring. Furthermore, because its lattice constant is a close match for Gallium Nitride (GaN), these wafers are frequently used as a base for growing high-quality epitaxial layers. This synergy allows for the creation of high-brightness blue and violet light-emitting diodes and laser diodes that maintain consistent performance and longevity even when subjected to intense operational heat or radiation.

Research, Development, and Prototype Testing

The 2-inch format of the 6H N-type wafer is specifically prized within academic and corporate research laboratories for pilot-line testing and material characterization. Its manageable size and cost-effectiveness allow researchers to experiment with novel thin-film deposition techniques and advanced lithography processes without the high overhead associated with larger-diameter production wafers. It is an indispensable tool for studying the physics of wide-bandgap semiconductors, including carrier mobility and interface trapping at the SiC/SiO2 boundary. These wafers accelerate the development of next-generation high-temperature sensors and radiation-hardened electronics intended for aerospace exploration, deep-well drilling, and other extreme environments where standard semiconductors would inevitably fail.

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