an exemplary film includes a base having an electrically insulating polymer which carries on one or both surfaces a sequence of electrically conductive coated areas which are separated by non-coated interstices. The film, which can include a superposition of films arranged one above another, can be shaped to form a capacitor. The capacitor can include a plurality of parallel electrodes which are insulated from each other. Each electrode can include one or more electrode layers formed by the coated areas that are separated by dielectric layers formed by sections of the base.