Self-healing non-metallized polystyrene capacitor

Claim 1

A self-healing capacitor comprising two carrier electrodes, each carrier electrode consisting of a sheet of plastic film with both surfaces substantially completely metallized from edge to edge, a dielectric film sandwiched between said carrier electrodes and a second dielectric film overlying one of said carrier electrodes, said carrier electrodes being offset from each other so that the edge of one carrier electrode extends beyond the edge of the other carrier electrode, the combined layers of carrier electrodes and dielectric films being convoluted to form multiple electrode layers separated by dielectric film, the sides of the resulting convolute being metallized to conductively join the metallized layers on the opposite surfaces of only one electrode on one side of the convolute and to conductively join the metallized layers on the opposite surfaces of only the other electrode on the opposite side of the convolute, said self-healing capacitor being characterized in exhibiting a stable temperature coefficient of capacitance not exceeding -50 + or - 50 parts per million per degree Centigrade over a temperature range from 0* centigrade to 70* Centigrade, and said carrier electrodes each consisting essentially only of nonporous polycarbonate dielectric sheet material and the conductively joined metallized layers on the opposite surfaces thereof, said nonporous polycarbonate dielectric sheet material of each carrier electrode having an interface directly with the metal of the associated metallized layers over substantially the entire extent of the opposite surfaces thereof.