Circuit board e.g. printed circuit board for power supply device used in automotive application, has circuit board portion that is provided with cavity so that passive components are arranged in cavity

摘要

The circuit board (10) has a circuit board portion that is provided with a top surface and a bottom surface. The inductance exhibiting passive electronic components such as ferrite core (14) and strip conductor (16) are provided in circuit board portion. A cavity (12) is formed inside the circuit board portion so that the passive components are arranged in the cavity.