What is aluminium nitride (AlN)?Aluminum nitride (a covalent-bond compound) is a white, grayish, or white-grayish atomic crystal that belongs to a diamond like nitride. Aluminum nitride formula AlN. Aluminum nitride, which is metal-treated, can replace tantalum oxide and alumina for many electronic instruments. Aluminum nitride may be produced by either reducing aluminum dioxide and carbon, or by direct aluminum-nitriding.

Aluminum Nitride Ceramic Properties
The aluminum powder is of high purity and activity. It is used as a raw material to make a ceramic substrate with high thermal conductivity. Aluminum nitride is a ceramic substrate with high thermal conductivity. It also has a low expansion coefficient. Aluminum nitride ceramics have a hardness that is higher than traditional alumina. It's a new material for wear-resistant ceramics.

The aluminum nitride substrate is described below.
China has had a long tradition of developing substrates. Substrates have also been continually improved. Fiber substrates, FR-4 aluminum substrates and even copper substrates are traditional substrates.

The improvement of industrial requirements and the refinement of thermal expansion coefficients and heat dissipation limits, it is necessary to look for alternatives.

A ceramic substrate made of aluminum nitride using LAM technology is an ideal choice. This allows the metal to be bonded more tightly to the ceramic and has a high bonding strength. The maximum is 45, Pa. This is the strength of a ceramic larger than one mm thick. The aluminum-nitride substrate is coated with a metal film that has a lower resistance and a higher resistance. It can also be customized in thickness between 1 mm and 1 mm.

Why is the aluminum-nitride ceramic substrate so much more expensive?
Comparing the thermal conductivity with the traditional ceramic substratum, the aluminum-based one is about 1 to 2W/mk. While the thermal conduction of copper reaches 383.8W/mK the thermal conduction of the insulating layers is only 1.0W/mK. This is a better value. 1.8W/mK. The aluminum-nitride ceramic has a greater thermal conductivity. Its data is between 170 and 230 W/m.k.

The coefficient of thermal contraction (CTE) is one example. In LED lighting the thermal conductivity is typically 1417ppm/C for the substrate, while the CTE on the silicon chip ranges from 6ppm/C. PCBs will expand in extreme temperatures and drastic temperature changes. This can lead to desoldering problems. CTE is 4-5ppm/C for aluminum nitride, which is brighter than the expansion ratio and is closer to it.

Aluminum nitride ceramics substrates do not contain organic materials, copper layers are free from oxides, have a long life span, can be used under reducing conditions for long periods of time and are suitable for aerospace equipment.

On the market, aluminum nitride-ceramic substrates are used widely. A low dielectric constant and low frequency loss allows high-frequency circuits to be designed, assembled and line/pitch (L), high-density assembly. /S The resolution can be as high as 20mm. It is very beneficial to have a small, thin, light, and short device in the current trend.

The ceramic substrates production market is located overseas. Due to the importance of establishing a strong foundation for research and development in technology, local PCB companies are paying more attention to this industry. The advantages of aluminum-nitride ceramics substrates are very prominent.

Tech Co., Ltd., a leading aluminum nitride producer, has over 12 years of experience in the chemical products research and design. Contact us if you need high-quality aluminum nitride. Send an inquiry .

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