What is aluminum Nitride?
The covalent bonding compound aluminum nitride (also known as aluminum nitride) is an atomic crystal that belongs to the diamond-like nitride. Aluminum nitride formula AlN. Aluminum nitride formula AlN can be combined with metal. This aluminum nitride may replace tantalum dioxide and alumina to make a variety of electronic instruments. Aluminum nitride could be obtained by reduction of aluminum dioxide and carbon or through direct aluminum Nitride.
The ceramic properties of Aluminum Nitride Ceramic:
Aluminium nitride is an aluminum powder with high purity. The particles are small and have high activity. Aluminium nitride ceramic is highly thermally conductive, has low expansion coefficient, good strength, resistance to chemical agents, electrical resistance and low dielectric loss. This makes it an excellent substrate for large-scale integrated heat sinks. Aluminum nitride ceramic substrate has high hardness, exceeding the traditional Alumina. It’s also a wear-resistant type of ceramic material.
Information regarding the ceramic substrate of aluminum nitride:
China has had a history of creating substrates. Over the past several decades, there have been many new types. Traditional substrates include FR-4, copper substrates, as well as aluminum substrates.
When the performance of traditional substrates is not sufficient to fulfill new industrial demands due to limitations like heat dissipation/thermal expansion coefficient matching, then people will have to consider other options.
LAM technology is the best option for an aluminum-nitride ceramic substrate. LAM (Laser high–peed activation metallicization) allows metal layers to be more closely attached to the ceramic. A ceramic piece with more than 1mm thickness can achieve 45, Pa. You can customize the thickness and resistance of the metal film layer in aluminum nitride substrate.
Is the aluminum Nitride ceramic substrate more expensive that other substrates.
Comparing to traditional ceramic substrates, the aluminum-based substrata’s thermal conductivity ranges from 1 to 2W/mk. While the thermal conductivity (copper) is 383.8 W/mK at its highest, the thermal conductivity (insulating layer) is less than 1.0 W/mK. 1.8W/mK. This aluminum nitride ceramic substrate is more thermally conductive and has data of 170 W/m.k.
Let’s take, for example, the coefficient of thermo expansion (CTE). LED lighting uses a mainstream substrate with a thermal conductivity (CTE) of approximately 1417ppm/C. While the CTE on the silicon chip is at 6ppm/C. Excessive temperature differences and drastic changes in temperature can cause the PCB to expand greater than the packaging. This causes the problem with desoldering. CTE (Cost of Transforming Aluminum Nitride Ceramic Substrat) is between 4-5ppm/C and 5.5ppm/C. The substrate’s CTE can avoid similar circumstances.
Aside from the fact that the aluminum nitride substrate ceramic does not include organic components, it also does not contain a copper layer. Therefore, this layer can be used long-term in a reducing environment and is ideal for aircraft equipment.
A wide range of aluminum-nitride ceramic substrates can be found on the market. Their low frequency loss (and low dielectric consistency) allow high-frequency circuits to be constructed and assembled. Additionally, line/pitch (L), high-density assembly and design can be made. A resolution as low as 20nm is possible. With the current trends of small and light it makes it very useful for small, lightweight, thin and light devices.
China is the largest market for ceramic substrates. It has become more important for domestic PCB companies to pay attention to the issue, as it allows them to achieve the localization for aluminum Nitride ceramic substrates. It is easy to see the advantages of aluminum-nitride ceramic substrates.
Luoyang Trunnano Tech Co., Ltd., also known as TRUNNANO, is a professional Aluminum Nitride Manufacturer with over 12+ years in chemical product research. If you need high quality aluminium nitride contact us .