Silicon Nitride Substrate

We provide silicon nitride ceramic substrates per request

SKU: SiN-S

General Details
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General Details

Silicon Nitride Substrate (Si3N4) – The Ultimate Ceramic Solution for High-Performance Electronics

Premium Si3N4 Ceramic Substrates for Demanding Applications

Silicon Nitride (Si3N4) ceramic substrates are the top choice for high-power, high-reliability electronic applications, offering an exceptional balance of thermal conductivity, mechanical strength, and thermal shock resistance. With a thermal conductivity of 80-90 W/(m·K) and a low thermal expansion coefficient (3.2×10-6/℃), Si3N4 substrates provide superior performance in extreme environments.

At Edgetech Industries, we specialize in customized silicon nitride substrates tailored for advanced semiconductor, power electronics, and high-temperature applications.

Silicon Nitride Ceramic Performance

item	Unit	Si3N4
Physical Property
Color	\	Gray Black
Density	g/cm3	>3.2
Mechanical properties
Rockwell hardness		HRA90
Vickers hardness (Hv50)	HV0.5	>1550
Elastic modulus (20℃)	Gpa	290
Bending strength(20℃)	Mpa	>600
Compressive strength (20℃)	Mpa	2500
Fracture toughness (20℃)	Mpam1/2	>6.0
Thermal properties
Thermal conductivity	W/(m·K)	15-20
Coefficient of thermal expansion（20℃-1000℃）	10^-6K^-1	>3.1
Thermal shock stability	△T℃	500
Specific heat capacity	KJ/kg.K	700
Maximum operating temperature（in air）	℃	1200
Electrical properties
Dielectric strength (insulation strength)	KV/mm	1
Volume resistance (20℃)	Ω.cm	10^12

*The above information is for comparison only. The exact characteristics will vary depending on the manufacturing method.

Why Choose Silicon Nitride (Si3N4) Substrates?

✔ Superior Thermal Conductivity – Efficient heat dissipation for high-power devices.
✔ Exceptional Mechanical Strength – 2x higher fracture toughness than AlN, ensuring durability.
✔ Excellent Thermal Shock Resistance – Withstands rapid temperature changes without cracking.
✔ Near-Matching CTE with SiC – Ideal for third-generation semiconductor (SiC) power devices.
✔ High Electrical Insulation & Low Dielectric Loss – Perfect for high-frequency applications.
✔ Outstanding Chemical Stability – Resists corrosion in harsh environments.

Key Applications of Si3N4 Ceramic Substrates

Power Electronics: IGBT, MOSFET modules
Electric & Hybrid Vehicles: Motor drives, inverters
Renewable Energy Systems: EV charging stations, solar inverters
Aerospace & Defense: High-reliability electronic packaging
Industrial Electronics: High-temperature sensors, RF components

Si3N4 vs. AlN: Why Silicon Nitride is the Better Choice

Silicon Nitride Sheets

While Aluminum Nitride (AlN) has slightly higher thermal conductivity, Si3N4 outperforms it in:
✅ Mechanical strength (2x higher than AlN)
✅ Fracture toughness (prevents cracking under stress)
✅ Thermal shock resistance (more reliable in cycling conditions)
✅ Compatibility with SiC devices (closer CTE match)

This makes Silicon Nitride the preferred substrate for next-generation power modules requiring both high thermal performance and structural integrity.

Custom Silicon Nitride Substrate Solutions

We provide precision-engineered Si3N4 substrates in various:

Thicknesses
Surface Finishes
Metalized Coatings (Au, Ag, Cu, Al)
Complex Geometries

Secure Packaging for Safe Delivery

To ensure damage-free shipping, our Silicon Nitride substrates are packed with:
🔹 Protective cushioning materials
🔹 Reinforced outer boxes
🔹 Vacuum sealing (for sensitive components)