What is aluminium nitride (AlN)?Aluminum nitride (a covalent-bond compound) is a white or grayish-white 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 directly nitriding aluminum.

Aluminum Nitride Ceramic Properties
Aluminum nitride has high purity and activity. It is used as a raw material to make a ceramic substrate with high thermal conductivity. The aluminum nitride substrate is a large-scale heat sink substrate that has excellent thermal conductivity. It also features a low expansion coefficient, possesses high strength, and can withstand high temperatures and chemicals. 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 (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 1 mm and 1 mm.

Why is the aluminum-nitride ceramic substrate so much more expensive?
Comparing the thermal conductivity with the ceramic substrate of traditional, the aluminum substrate has a value between 1 and 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, 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). The resolution of the /S can be up to 20mm. It is ideal for the small, thin, lightweight, and short device to be in line with 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. 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. Sending an inquiry .

Inquiry us