Aluminum nitride ceramic substrate: a better choice is an irresistible trend

What is aluminum nitride?

Aluminum nitride (a covalent bond compound) is a diamond-like nitride, hexagonal crystal system, wurtzite crystal structure, non-toxic, white or off-white atomic crystal. The molecular formula of aluminum nitride is AlN. Aluminum nitride is metal treated and can replace aluminum oxide and tantalum oxide in a large number of electronic instruments. Aluminum nitride can be prepared by reducing aluminum oxide and carbon or by directly nitriding aluminum.

Overview of Aluminum Nitride Ceramics

Aluminum nitride powder has high purity, small particle size and high activity, and is the main raw material for manufacturing high thermal conductivity aluminum nitride ceramic substrates. Aluminum nitride ceramic substrate has high thermal conductivity, low expansion coefficient, high strength, high temperature resistance, chemical resistance, high resistivity and low dielectric loss, and is an ideal large-scale integrated circuit heat sink substrate And packaging materials. Aluminum nitride has a high hardness, surpassing the traditional alumina, it is a new type of wear-resistant ceramic material.

Information about aluminum nitride ceramic substrate:

China's substrates have a long history of development, and the types of substrates are constantly increasing. Traditional substrates include fiber substrates, FR-4, aluminum substrates and copper substrates.

With the improvement and consummation of industrial demand, limited by the matching of heat dissipation and thermal expansion coefficient, when the traditional substrate performance is difficult to meet the new demand, people have to start looking for alternatives. In the process of seeking various needs, they will naturally compare Various substrates, the best choice.

As the best choice, aluminum nitride ceramic substrates using LAM technology (laser high-rate activation metallization) can make the metal layer more tightly bonded to the ceramic, and the bonding strength between the metal layer and the ceramic is high. The maximum value can reach 45 Pa (the strength of the ceramic sheet is greater than 1mm thick). The aluminum nitride substrate has a metal film layer, which has a higher resistance and a lower resistance, and the thickness of the conductive layer can be arbitrarily customized in the range of 1 μm to 1 mm.

Why are aluminum nitride ceramic substrates more expensive than other substrates?

Compared with traditional ceramic substrates, the thermal conductivity of aluminum-based substrates is 1-2 W/mk. Although the thermal conductivity of copper itself reaches 383.8 W/mK, the thermal conductivity of the insulating layer is only about 1.0 W/mK, which is better. 1.8W/m Aluminum nitride ceramic substrate has high thermal conductivity, the data is 170 to 230 W/mk

For example, the coefficient of thermal expansion (CTE). In the field of LED lighting, the average thermal conductivity of the mainstream substrate CTE is 14~17ppm/C, and the CTE of the silicon chip is 6ppm/C. In the case of excessive temperature difference and rapid temperature changes, the PCB will expand more than the chip package. , Leading to desoldering problems. Under such troubles, the CTE of the aluminum nitride ceramic substrate is 4-5ppm/C, which is brighter and closer to the expansion rate of the chip, which can effectively avoid similar situations.

In addition, the aluminum nitride ceramic substrate does not contain organic components, and the copper layer does not contain an oxide layer, has a long service life, and can be used for a long time in a reducing atmosphere, and is suitable for aerospace equipment.

Aluminum nitride ceramic substrates are widely used in the market. Due to their low frequency loss and low dielectric constant, high frequency circuits can be designed and assembled, and high density assembly, line/pitch (L) can be performed. /S) The resolution can reach 20μm. Under the current trend of lightness and thinness, it is very conducive to short, light and thin devices.

The production market for ceramic substrates is overseas. In recent years, in order to realize the localization of aluminum nitride ceramic substrates, the advantages of independent research and the increasing demand for aluminum nitride substrates in the domestic market in order to lay a better foundation for technology research and development, therefore, it has occupied the first line of the industry Status, domestic PCB companies have also paid more attention to this. The advantages of aluminum nitride ceramic substrates are outstanding.

Application of spherical aluminum nitride

1.After the second laser melting,the spherical alloy is alloyed,the size is uniform,and the fluidity is good,which improves the thermal conductivity and insulation of the material.

2.After the spherical aluminum nitride is melted,the surface is treated with anti-hydrolysis and anti-oxidation,and the thermal conductivity will exist for a long time after adding.

3.Spherical aluminum nitride has good injection molding properties and is used for composite materials.It has good matching with semiconductor silicon and good interface compatibility, which can improve the mechanical properties and thermal conductivity of composite materials.

4.Application in high thermal conductivity plastics:Modified spherical aluminum nitride powder can greatly improve the thermal conductivity of plastics.At present, it is mainly used for PVC plastics,polyurethane plastics,PA plastics,PP plastics,functional plastics,etc.

The price of spherical aluminum nitride

The price of spherical aluminum nitride will vary randomly with the production cost, transportation cost, international situation,and the market supply and demand of spherical aluminum nitride.Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find by providing a full set of customized services High quality,low price nanomaterials and chemicals.If you are looking for spherical aluminum nitride,please feel free to send an inquiry to get the latest price of spherical aluminum nitride.

Suppliers of spherical aluminum nitride

As a global supplier of spherical aluminum nitride,Tanki New Materials Co.,Ltd has extensive experience in the performance,application and cost-effective manufacturing of advanced and engineered materials.The company has successfully developed a series of powder materials(titanium nitride,nitrogen Silicone,titanium nitride, etc.)high-purity targets,functional ceramics and structural devices,and provide OEM services.