Curved Gap Strips in Laminated Metallization Film Capacitor Electrodes

The electrode structure is segmented into multiple metallization films with metal-uncoated gap strips positioned between adjacent metal coating units. This segmentation creates multiple insulation barriers along the current path, effectively increasing the total insulation distance without requiring a single large gap that would waste space. The segmented approach allows compact arrangement while maintaining high withstand voltage capability.

The patent transitions from relying solely on the thin dielectric coating (one-dimensional insulation) to incorporating metal-uncoated gap strips that extend the insulation path in the lateral dimension. By adding insulation distance in the plane of section rather than only relying on dielectric thickness, the structure achieves enhanced withstand voltage without significantly increasing the overall capacitor size in the thickness direction.

Instead of using a single thick dielectric coating, the insulation function is segmented across multiple thin dielectric layers separated by metal-uncoated gap strips. Each dielectric layer remains thin and easy to manufacture, while the cumulative insulation effect of multiple layers plus gap strips achieves the required withstand voltage, avoiding the manufacturing difficulties of producing and controlling single thick coatings.

The metal-uncoated gap strips act as intermediary insulation elements between adjacent metal coating units. These gap strips provide additional insulation distance without requiring increased dielectric coating thickness. The gap strips serve as mediators that extend the insulation path while maintaining compatibility with existing thin-film manufacturing processes.