The description of Si3N4 ceramic disc and substrate 
Silicon nitride (Si3N4) is a man-made compound synthesized through several different chemical reaction methods. Parts are pressed and sintered by well-developed methods to produce a ceramic with a unique set of outstanding properties. The material is dark gray to black in color and can be polished to a very smooth reflective surface, giving parts with a striking appearance.
Silicon nitride exceeds other ceramic materials in thermal shock resistance. It also offers an excellent combination of low density, high strength, low thermal expansion, and good corrosion resistance and fracture toughness.
silicon nitride has been used in a number of industrial applications, such as engine components, bearings, and cutting tools.


Related products for Si3N4 ceramic disc







Remark:
We produce a selection of ceramic wafers in different materials, customized designs, including alumina ceramic wafers, zirconia ceramic wafers, silicon nitride ceramic wafers, and silicon carbide wafers.

Why choose us? 
1. 10+ Years of manufacturing experience in OEM, ODM and trusted & professional teams
2. Powerful R&D, prototyping & mass production capability to support trial order and high volume production
3. In-house comprehensive manufacturing types of equipment from raw materials to high precision machining
4. Rigorous quality control system and processes, including IQC, IPQC, QA, OQC in working instructions
5. Surpassing pre-sales, sales, and after-sales service, abide all orders every customer as the first priority

Production capability and our strength






Rigorous quality-control system



The specification of ceramic disc and substrate
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 Si3N4 ceramic disc and substrate
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/ºC) matches the semiconductor silicon material (3.5-4.0×10-6/ºC);
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 ºC to 200 ºC and then cool down, repeat 10000 times;
7. Chemical resistance, resistant oxidization, acid, alkali corrosion, service life-span up to 10 years

FAQs (Frequently Asked Questions)
Q1. Are you a factory or trading company?
A: We are a direct professional manufacturer for technical ceramics. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the free sample with standard design in stock can be supplied, but freight collect.
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: Is it available to provide customized products?
A: We always support custom-made ceramic sheets as per different materials, dimensions, and designs.
Q5: What any other products do you manufacture?
A: Yes, we also produce metalized ceramics, ceramic tubes, zirconia ceramic parts, ceramic seals besides ceramic wafers