A major supporter of printed circuit board applications is the medical industry. Sophisticated medical devices are crucial to diagnosing diseases, providing treatment and conducting research. Some PCB uses in the medical industry include implantable devices, lab equipment and imaging equipment.

Medical PCBs are usually high-density interconnect PCBs (HDI PCBs) so they can fit in small devices like implants or monitors. Flex PCBs are also common due to size and shape restrictions of medical devices.