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What is aluminium nitride (AlN)?Aluminum nitride (a covalent-bond compound) is a crystalline atom belonging to a diamond like 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 directly by 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, withstands high temperatures, resists chemicals, and exhibits high electrical resistance. 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'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 peeed activation metalization) 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 aluminum substrate to a traditional ceramic substrate the thermal conductivity ranges from 1 to 2W/mk. While the thermal conduction of copper is up to 383.8 W/mK the thermal conductivity 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 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 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). 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 substrate production market is located overseas. Due to the importance of independent research in the past few years and the growing demand for aluminum-nitride substrates on the domestic market, this technology has been given the top priority in the industry. 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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