4 inch N-type Silicon Carbide Wafer with multiple Thickness options for EV power trains and high density motor drives

4inch Silicon carbide wafer's Product description:

Our 4 inch N-Type Silicon Carbide Epitaxial Wafer is engineered for high-performance optoelectronics, harsh-environment sensing, and advanced material research. This 4-inch (101mm) substrate features a precision 350 µm thickness, offering superior mechanical stability for complex microfabrication.
The 4H-SiC dominates power electronics, the majority of china market has been replaced with domestically-manufactured crystal-growth furnaces. 
Nitrogen-doped for reliable conductivity, this wafer is the industry standard for researchers and aerospace engineers requiring a chemically inert, radiation-hardened platform. Perfect for next-generation SBDs in specialized sensing or high-index optical applications.


Features:

1. Our 4-inch N-type 4H-Silicon Carbide wafers are engineered for next-generation power electronics. Featuring a wide bandgap of 3.26 eV and a high breakdown field, these substrates allow for thinner, more efficient device layers. This ensures superior performance in high-voltage environments compared to traditional silicon.

2. Thermal management is enhanced by a conductivity of 4.5 W/cm·K, promoting rapid heat dissipation. Nitrogen doping provides a precise resistivity of 0.015–0.028 Omegacm. This optimization facilitates low-loss energy conversion and high-speed switching, which is essential for compact, high-density power modules and modern electronic applications.

3. The 100mm format offers a durable, cost-effective solution for automotive and industrial manufacturing. Its mechanical hardness and chemical stability ensure reliability in harsh conditions. These wafers are ideal for producing lightweight, efficient components used in electric vehicle inverters, renewable energy grids, and advanced aerospace systems.

Applications:

4-inch N-type Silicon Carbide wafers are primarily utilized in the automotive industry, specifically for electric vehicle (EV) power trains. By replacing traditional silicon with SiC inverters and on-board chargers, manufacturers can achieve higher efficiency and faster switching speeds. This leads to longer driving ranges and significantly reduced battery charging times for modern EVs.

In the energy sector, these wafers are critical for renewable energy systems and smart grids. Their high thermal conductivity and voltage tolerance make them ideal for solar inverters and wind turbine converters. By minimizing energy loss during power conversion, SiC technology helps maximize the output of sustainable energy sources and stabilizes long-distance power distribution.

Beyond energy, these substrates serve aerospace and industrial applications where extreme durability is required. They power high-density motor drives, heavy industrial equipment, and satellite communication systems. The material's ability to operate reliably in harsh, high-temperature environments ensures that critical defense and aerospace hardware remains functional under conditions that would cause standard electronics to fail.

Technical Parameters:

Customization:

We provide versatile geometric tailoring. We can adjust wafer thickness and offer various off-cut orientations—ranging from standard 4° tilts to on-axis cuts—to match your epitaxial growth recipe. We also offer different doping options, adjusting resistivity levels to support both N-type conductivity for EV power modules and Semi-Insulating structures for high-frequency RF applications. By fine-tuning our growth cycles, we focus on providing the electrical consistency required for stable, high-performance devices.

FAQs:

Q:Does "Research Grade" (R-Grade) mean the wafer is broken?

A: No. An R-Grade wafer is physically intact and structurally 4H-SiC. However, it typically has a higher micropipe density or slightly more surface "pits" than Prime Grade. While it is not reliable for mass-producing high-voltage commercial chips, it is a cost-effective choice for university testing, polishing trials, or equipment calibration where 100% chip yield is not required.

Q: Why is Silicon Carbide so much more expensive than regular Silicon?

A: It mostly comes down to how hard it is to "grow" and "cut." While Silicon crystals can be grown into huge 12-inch ingots in a couple of days, SiC crystals take nearly two weeks to grow and result in much smaller sizes. Because SiC is almost as hard as diamond, slicing and polishing it requires specialized, expensive diamond-tipped tools and high-pressure processes. You are paying for a material that survives much higher heat and voltage than regular Silicon can handle.

Q: Do I need to polish the wafers again before using them?

A: No, if you order "epi-ready" wafers. These have already undergone chemical mechanical polishing, meaning the surface is atomically smooth and ready for your next production step. If you buy MP or "Dummy" wafers, they will have microscopic scratches and will require further professional polishing before you can build any working chips on them.

Related product:

SIlicon Carbide Wafer 4inch dia x 350um 4H-N type P/R/D grade MOSEFTs/SBD/JBS