Rogers Offers Direct Bond Copper PCB Substrates Built for High Current, High Heat, and Long Life

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Rogers Corporation’s Direct Bond Copper (DBC) substrate technology, offered under the curamik® brand, has become a key enabler for demanding power electronic designs. This technology is based on a ceramic insulating substrate onto which pure copper is directly bonded through a high-temperature melting and diffusion process, resulting in a structure that combines excellent electrical insulation with outstanding thermal and mechanical performance.

Rogers’ DBC substrates are manufactured using high-quality ceramic materials such as aluminum oxide (Al2O3) and aluminum nitride (AlN). Al2O3 provides a thermal conductivity of approximately 24 W/mK, while AlN offers significantly higher values in the range of 180 to 230 W/mK, making it particularly suitable for high-power and high-heat-density applications. In addition, HPS ceramics with thermal conductivity around 28 W/mK further extend the material options. When these ceramics are combined with thick layers of pure copper, typically between 200 and 600 micrometers, the result is excellent heat spreading, high heat capacity, and reliable operation at elevated temperatures.

The thermal expansion behavior of the ceramic materials is another critical advantage. With coefficients of thermal expansion close to that of silicon, DBC substrates provide a robust platform for mounting bare semiconductor dice, minimizing mechanical stress and enhancing long-term reliability over the product life cycle. The use of pure copper also delivers exceptional current-carrying capability, outperforming alternative substrate technologies.

Beyond standard power electronics, Rogers curamik® technology is also applied in advanced cooling solutions. These designs incorporate internal channel structures made from thin copper foils, which are assembled into hermetically sealed blocks using a patented bonding process. The resulting high copper surface area enables highly efficient liquid cooling for applications with extreme thermal demands. With customizable layouts similar to printed circuit boards and a proven combination of high thermal conductivity, reliability, and design flexibility, Rogers’ Direct Bond Copper substrates remain a critical solution for modern high-performance power electronic systems.

Click here to learn more about curamik® DBC substrates from Rogers.