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CeramTec releases new aluminum nitride high-performance substrate for EV power electronics

November 04, 2023

Ceramtec, a ceramic substrates manufacturer, released its latest high-performance (HP) aluminium nitride substrate (Alunit® AlN HP) for EV power electronics.

The main new feature is a 40 percent improved flexural strength with high thermal conductivity.

With the high flexural strength of≥ 450 MPa, Alunit® AIN HP enables the conductive metallization to bond to the ceramic substrate over the long term, even during extreme thermal cycling. The coefficient of thermal expansion of 3.7 – 5.7 ppm/K at up to 300°C is close to typical semiconductor materials. Alunit® AlN HP thus increases the long-term durability of power modules.Numbers are the best facts Further advantages of Alunit® AlN HP include its high thermal conductivity of 170 W/mK and an electrical insulation and dielectric strength of ≥15 kV/mm at 20 °C. Metallisation in copper or aluminium is possible, which is mostly used in power electronics – for example in DCB (Direct Copper Bonded), AMB (Active Metal Brazing) or SMB (Sputtering Metal Bonding) ceramic substrates.

For high performance and temperaturesAlunit® AlN HP is an excellent choice for use in high-voltage and high-performance power modules as well as for high-power LEDs and for chip resistors – also and especially at higher currents and in increasingly smaller components. In these application areas, the ceramic substrate Alunit® AlN HP is technically superior to IMS (Insulated Metal Substrates) materials, for example. CeramTec offers the product as a substrate in the masterplate format of 190.5 x 138.0 x 0.635 mm, other thicknesses (e.g. 1.00 mm) and formats on request.

In the future ceramics:With the development of the high-tech substrate Alunit® AlN HP, CeramTecsupports the ongoing decarbonisation and electrification of industry; for example, in the areas of e-mobility, heating, cooling or also in the conversion and distribution of electrical energy. The electronic modules required for these applications must meet extreme requirements with ever smaller dimensions: from optimal flexural strength to high thermal conductivity and excellent electrical insulation to minimal expansion coefficients.

About Ceramtec:“CeramTec is the innovation leader in Al2O3 substrates and also a leadingone-stop-shop supplier for high-quality ceramic substrates in Europe. Theproduct portfolio is based on own high-volume production capacities andranges from aluminium nitride HP to aluminium oxide, aluminium oxide reinforced with zirconium oxide and zirconium oxide, to silicon nitride. Thanks to production in Europe, CeramTec offers exemplary quality standards and short delivery routes. With more than 100 years of experience in the production of technical ceramics, CeramTec also proves itself as a development partner for established as well as new areas of application.”