Flexible dielectric film and method for making
AssigneeFaradox Energy Storage, Inc.
InventorsKeith D. Jamison, Martin E. Kordesch
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Abstract
Flexible films or sheets for forming high-breakdown strength, high-temperature capacitors are disclosed. Amorphous metal oxides and nitrides, preferably SiO2 or HfO2, with a dielectric constant (k) greater than 2 and stacks of oxides and nitrides formed over conducting substrates may be formed. The dielectrics may be formed by reactive sputter deposition of the amorphous materials onto cooled substrates. The cooled substrate allows the films to be amorphous or nanocrystalline and results in films that can be flexed and that can be rolled into cylindrical shapes. An important application for these dielectrics is in high energy-density wound capacitors.
Claims19
A sheet of material for forming a wound capacitor, comprising:
- a flexible substrate comprising a polymer film having a metal coating on each side of the polymer film;
- a flexible dielectric layer of oxide or nitride on at least a portion of the metal coating, the layer having a thickness greater than 0.1 micrometers;
- and
- a conducting wire attached to the metal coating.
Method for making a flexible material for a wound capacitor, comprising:
- providing a flexible substrate comprising a polymer film having a metal coating on each side of the polymer film;
- depositing a layer of an oxide or nitride on a portion of the metal coating;
- and
- attaching an electrical conductor to the metal coating.
Dependencies are inferred from the claim text.