Bosch’s S-Cell: the next key to unlocking SiC performance

Compared with traditional packaging approaches, a PCB‑embedded architecture can effectively reduce parasitic inductance (i.e. unwanted inductive effects caused by electrical interconnects), shorten current paths, optimize contact area, and enable more precise electrical interconnect design. One key advantage of PCB embedding is its suitability for high DC bus voltages. Lower parasitic inductance enables faster switching while reducing both switching losses and voltage overshoots – a key advantage in high DC bus voltage applications. Combined with improved thermal management, this supports higher power density and more compact designs, giving engineers greater flexibility when developing next-generation high-performance power modules.

In Bosch’s early sample validations, the S‑Cell achieved extremely low LCC (life cycle cost) values and demonstrated excellent performance under high‑current, high‑voltage operating conditions, fully confirming the huge potential of PCB‑embedded technology for future high‑power applications. These characteristics are especially important for systems that must balance high‑speed switching, electromagnetic compatibility (EMC), and thermal stability.

Reliability is always critical to the successful deployment of power electronic products. Leveraging years of automotive‑grade semiconductor development experience, Bosch has established a comprehensive S‑Cell validation framework. To meet different customer application requirements, S‑Cell units support electrical characterization and testing. Relevant tests performed to AEC‑Q101 standards form the basis of the reliability evaluation. Beyond assessing the component itself, interactions among the chip, contacts, embedding, and thermal interfaces are also crucial. The data supports both the technical qualification of individual samples and the development of future module platforms. This way, S‑Cell units are validated as integral parts of a robust, holistic system.

For customers, Bosch’s silicon carbide S-Cell provides greater design freedom and shorter design cycles while supporting higher power density and lower losses. With the third‑generation bare die and S‑Cell technology, Bosch can apply this embedded approach to solutions that demand exceptional efficiency, miniaturization, and thermal stability – for example in traction inverters and industrial power converters – where compact size and high efficiency are key differentiators. The S‑Cell opens up additional freedom in package and module design, enabling new architectures and circuit topologies that are difficult to achieve with conventional design approaches.