An innovative process to improve the end-contacts of metallic polypropylene capacitors by arc spray and PVD

Metallized polypropylene (MPP) capacitors are electronic devices that store energy, and are generally used in electric motors. The MPP capacitor is integrated of two MPP foils that must be connected each one at the edge using a conductive layer to assure connections with an external circuit, where a single layer of zinc by Arc-spray technique is generally used. The zinc layer is known as ‘schooping’, End-spray, contact layer or End-contact, this coating has a thickness of 400-500 μm.