MULTILAYER FILM CAPACITOR AND PRODUCTION METHOD THEREOF

摘要

A both-side-metallized polypropylene film having aluminum-zinc alloy evaporated on both sides of the film and a non-metallized polypropylene film are wound on a cylindrical bobbin plural times, thus providing a cylindrical winding body formed of multi-layer films. Then, sprayed-metal electrodes are formed on both sides of the cylindrical winding body. The cylindrical winding body is cut to obtain plural capacitor elements. Pulse laser beam is applied to a cut surface of the capacitor element, then metal exposed on the cut surface and metal evaporated on a surface of the films near the cut surface are removed by a distance not shorter than 0.05mm from the cut surface. This processes provides a multi-layer film capacitor usable at a voltage not lower than AC350V.