What is aluminium nitride (AlN)?Aluminum nitride (a covalent-bond compound) is an atomic-crystal belonging to a diamondlike nitride. It has hexagonal crystals, a wurtzite structure, and is non-toxic. 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 high 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, and can withstand high temperatures and chemicals. 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 ceramic substrate of traditional, the aluminum substrate has a value between 1 to 2W/mk. While the thermal conduction of copper reaches 383.8W/mK the thermal conduction of the insulating layers is only about 1W/mK. This is a better value. 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 1417ppm/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 a high-density line/pitch (L). /S The resolution can be as high as 20mm. It is good for the device to be small, thin, and light.

Ceramic substrates have a large overseas market. Due to the importance of a localization of aluminum-nitride ceramics substrates and the benefits of independent research as well the growing demand for aluminum-nitride substrates in the domestic markets, this industry has been given a higher priority in recent years. Aluminum nitride is a ceramic substrate that has many advantages.

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

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