Patent ID: 8427807

Claim:
A capacitor apparatus for application in high pressure environments comprising: a pair of terminals positioned on opposing lateral sides of the capacitor, at least two electrodes and at least one electrically insulating film forming a dielectric between the electrodes, each electrode comprising at least one metallic foil or at least one metallic layer on the electrically insulating film, each electrode connected to one of the terminals and extending laterally toward the other terminal, and each electrically insulating film extending laterally between the pair of terminals, wherein cavities are defined at interfaces between the insulating films and the metallic foils or layers, wherein the capacitor is disposed within a housing filled with a nonconducting liquid, wherein the capacitor is unencapsulated such that the liquid in the housing directly surrounds the capacitor and fills the cavities at the interfaces between the insulating films and the metallic foils or layers of the capacitor, wherein the housing of the capacitor apparatus is submersed in water in a deep sea environment, and wherein a pressure acting on the housing from outside the housing due to seawater is essentially the same as a pressure acting on the housing from inside the housing due to the nonconducting liquid in the housing.