Patent ID: 7929271

Claim:
A film capacitor including a self-healing function and a self-protection mechanism, comprising: a roll of a first electrode pattern and a second electrode pattern which confront each other with a dielectric film sandwiched therebetween; a first terminal electrically connected to one end of the roll; and a second terminal electrically connected to another end of the roll, wherein the first electrode pattern includes a first lead-out electrode extending continuously in a longitudinal direction of the dielectric film, a plurality of first capacitor electrodes extending substantially perpendicularly from the first lead-out electrode, and a plurality of second capacitor electrodes disposed between the first capacitor electrodes and connected to the first capacitor electrodes; the second electrode pattern includes a second lead-out electrode extending continuously in the longitudinal direction of the dielectric film, a plurality of third capacitor electrodes extending substantially perpendicularly from the second lead-out electrode, and a plurality of fourth capacitor electrodes disposed between the third capacitor electrodes and connected to the third capacitor electrodes; the first capacitor electrodes of the first electrode pattern and the fourth capacitor electrodes of the second electrode pattern are superposed one on the other with the dielectric film being sandwiched therebetween, and the second capacitor electrodes of the first electrode pattern and the third capacitor electrodes of the second electrode pattern are superposed one on the other with the dielectric film being sandwiched therebetween; the width of the fourth capacitor electrodes along the longitudinal direction of the dielectric film is greater than the width of the first capacitor electrodes along the longitudinal direction of the dielectric film, and the width of the second capacitor electrodes along the longitudinal direction of the dielectric film is greater than the width of the third capacitor electrodes along the longitudinal direction of the dielectric film; the first lead-out electrode of the first electrode pattern extends to a side edge of the dielectric film such that the first lead-out electrode is electrically connected to the first terminal; and the second lead-out electrode of the second electrode pattern extends to another side edge of the dielectric film such that the second lead-out electrode is electrically connected to the second terminal.