Abstract: A flexible metal core printed circuit board assembly comprises a flexible printed circuit board structure. The flexible printed circuit board structure includes a flexible substrate, a conductive layer on the flexible substrate and a space formed in the flexible printed circuit board structure. The space extends through the flexible printed circuit board structure. The flexible metal core printed circuit board assembly further comprises a flexible conductive structure having a pillar. The flexible conductive structure is provided underneath the flexible printed circuit board structure with the pillar disposed in the space. The pillar has a top surface that is in a planar surface with a top surface of the flexible printed circuit board structure.