a low profile magnetic component such as an inductor or transformer includes a core and a planar magnetic winding body having a dense , rigid structure composed of a stack of individual winding patterns separated by insulating layers , and a binder / filler material . the input and output termini of the individual winding patterns are revealed in a side face of the winding body , where they are interconnected with a plated metallization . such structures may be mounted onto a pc board , and are useful , for example , in electronic ballasts for the lighting industry .