What is aluminium nitride (AlN)?Aluminum nitride (a covalent-bond compound) is an atomic-crystal belonging to a diamondlike nitride. It is non-toxic with a white or grayish white color. Aluminum nitride formula AlN. Aluminum nitride, which is metal-treated, can replace alumina or tantalum for many electronic instruments. Aluminum nitride may be produced by either reducing aluminum dioxide and carbon, or by directly nitriding aluminum.

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 alumina. It is a new material for wear-resistant ceramics.

The aluminum nitride substrate is described below.
China's substrate development has a rich history. Substrates have become more diverse over the years. 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 (Laser high peed activation metallization), is an ideal choice. This allows the metal to be more closely adhered to the ceramic. Also, the bonding between the metal and ceramic layer is strong. 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 1mm-1mm.

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 itself is up to 383.8 W/mK the thermal conduction of the insulating layers is only around 1.0W/mK. This is much better. 1.8W/mK. The aluminum-nitride ceramic has a greater thermal conductivity. Its data ranges between 170 and 230 W/m.k.

The coefficient of thermal contraction (CTE) is one example. In LED lighting the average thermal conductivity CTE for the substrates is 14-17ppm/C and that of the silicon chips is 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 oxide layers, 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 high-density line/pitch (L). /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 independent research in achieving the localization of ceramic aluminum nitride and the growing demand in the domestic marketplace, PCB manufacturers have been paying more attention in recent years. Aluminum nitride is a ceramic substrate that has many advantages.

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 a request .

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