Aluminum Nitride Substrate

When it comes to providing good thermal conductivity and high electrical insulation features, aluminum nitride substrate is a superb option because of its efficacy. Aluminum nitride sheets are widely used in the semiconductor application industry instead of beryllium oxide (BeO) since aluminium nitride is non-toxic and does not produce dangerous vapors when grinded and machined. Aluminum nitride ceramic substrate has a thermal expansion and isolation coefficient which closely matches the silicon wafer product, making it useful in applications in electronics that often have high temperatures and heat dissipation problems.

Aluminum nitride ceramic sheet is readily oxidized on the surface. When this occurs, aluminum oxide is formed as a protective film. Nevertheless, when using alumina, you are trying your best to preserve the material, however, it affects the thermal conductivity. When in oxidizing environment, which takes place around 700 degree C. In inert environment, this coating is used to cover aluminum nitride plate up to around 1,350 degree C. The bulk oxidation can take place above this temperature. Aluminum nitride ceramic is one of the few materials that provides both electrical insulation and excellent heat conductivity. Aluminum nitride (AlN) sheet is essential in high power electronic applications in heat sink and heat spreader devices, owing to its unusually high thermal conductivity.

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Material Data Sheet(AlN)

Processing of Aluminum Nitride Ceramic Plate

The post-processing of AlN ceramics can choose different processing methods according to the shape and tolerance, surface roughness, processing efficiency and cost of AlN ceramics. Common advanced ceramic processing methods mainly include: mechanical processing (grinding, wheel cutting, sandblasting), chemical mechanical processing (polishing), laser processing, high-pressure abrasive water jet cutting, etc. Converted aluminum nitride products are widely used, which puts forward higher requirements for product-scale processing efficiency and cost control. Targeted ceramic laser cutting processing has no tool wear during operating and no direct cutting force acts on the workpiece. The processing efficiency is high, which is 8-20 times that of ordinary grinding wheels. The advantages of being able to process products with complex shapes, good product consistency, and low production costs have attracted more and more attention.

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