Refractory High Thermal Shock Custom Silicon Nitride Si3N4 Ceramic Wafer
The specification of the Si3N4 Ceramic wafer
1. The typical thickness of the silicon nitride substrate covers 0.30mm, 0.5mm, 0.635mm, 1.0mm
2. We are supplying with many round ceramic wafer, square & rectangular ceramic substrate
3. The biggest diameter of the round ceramic wafer can be up to 400mm in 3mm, 4mm, 5mm thick
4. The max. side-length of the square and rectangular ceramic substrate can be 400mm by 500mm
5. Surface treatment: it can be one-side, or double side polished to be Ra0.4 or better
The main features of the Si3N4 ceramic wafer
1. High thermal conductivity ( up to 70 W/m.k), 3 times that of alumina ceramic substrate;
2. The thermal expansion coefficient (3.1×10-6/℃) matches the semiconductor silicon material (3.5-4.0×10-6/℃);
3. The bending strength is higher than that of the alumina substrate, which is twice that of the alumina substrate;
4. Excellent electrical performance, with extremely high insulation resistance and low dielectric loss;
5. The compatibility of circuit materials is good, and multi-layer wiring can be performed to achieve miniaturization of the package;
6. High thermal shock resistance, from 0 ℃ to 200 ℃ and then cool down, repeat 10000 times;
7. Chemical resistance, resistant oxidization, acid, alkali corrosion, service life-span up to 10 years.
The description of the Si3N4 ceramic wafer
Silicon Nitride (Si3N4) is a widely used technical ceramic material in the high-temperature application, it has high strength in both room temperature and high-temperature condition, the strength of silicon nitride can be kept up to 1200℃; the low coefficient of thermal expansion make it a ceramic material possessing excellent thermal shock resistance; at the same time, it also has good thermal conductivity.
Except for the excellent properties in the thermal application, silicon nitride also has a good mechanical, chemical, electrical properties. It has good strength, good flexural strength and wear resistance; it is a good performance electrical insulation ceramic
Property Datasheet of Si3N4 Ceramic Wafers and Ceramic Substrates
| General | Properties | Unit | Value |
| Mechanical | Purity | % | ≥99 |
| Volume Density | g/cm3 | ≥3.22 |
| Color | | Grey |
| Compressive Strength | MPa | ≥-2500 |
| Bending Strength | MPa | 600 |
| Elastic Modulus | MPa | 300 |
| Fracture toughness | Mpam1/2 | 7 |
| Thermal | Max. service temperature (Non-loading) | ℃ | 1300 |
| Thermal Conductivity (25℃) | W/m.k | ≥70 |
| Coefficient of Thermal Expansion (CTE) | 1*10-6 m/k | 3.1 |
| Specific heat | 1 x 103J/(kg·K) | 0.5 |
| Electrical | Volume Resistivity (25℃) | ohm.cm | - |
| Insulation Breakdown | KV/mm | - |
| Dielectric constant (1Mhz) | (E) | 6 |
Our capability and strength
1.With 15 years of manufacturing experience in OEM, ODM
2. Powerful R&D, customized and mass production capability
3. In-house comprehensive manufacturing types of equipment
4. Rigorous quality control system and processes
FAQs (Frequently Asked Questions)
Q1: Is it available to provide customized products?
A: We always support custom-made demand as per different materials, dimensions, and designs.
Q2. Are you a factory or trading company?
A: We are a direct manufacturer of technical ceramic components. You are welcome to visit our factory.
Q3: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call us or tell us in your email so that we will proceed with your inquiry as a priority.
Q4: How to ensure quality?
A: We have a complete strict quality-control system, including IQC, IPQC, QA, OQC per ISO9001: 2008
Q5: What other products are you dealing with?
A: We also focus on a variety of metalized ceramics, high precision zirconia ceramic parts, ceramic seals.
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