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 direct aluminum-nitride.

Aluminum Nitride Ceramic Properties
Aluminum nitride has a high degree of purity, a small size particle and a lot of activity. This powder is used as a raw material to make a ceramic substrate that is highly thermally conductive. 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, is resistant to high temperatures, and offers chemical resistance. Aluminum nitride ceramics have a hardness that is higher than the traditional alumina. It is a wear-resistant material with a high level of hardness.

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, copper substrates, and fiber substrates are all 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 more tightly bonded to 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 aluminum substrate to the ceramic one, its thermal conductivity ranges from 1 to 2W/mk. While the thermal conduction of copper 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 CTE for the substrate average is between 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 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 frequency loss, low dielectric constant and high density assembly (L) are possible due to the low dielectric constant and low frequency losses. The resolution of the /S can be up to 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 an inquiry .

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