High energy density capacitor
First Claim
1. A high energy density multilayer capacitor having an energy density of at least about 0.5 J/cm3, said capacitor comprising a plurality of interleaved, vacuum-deposited metal electrode layers, each layer separated by vacuum-deposited, radiation-cured polymer dielectric layers, thereby defining an active capacitor region, said interleaved metal electrode layers terminating at opposite ends in a multilayer sputtered, solder-coated termination strip, said metal electrode layers recessed into said polymer dielectric layers along edges orthogonal to said opposite ends, thus creating a non-conducting region, to protect against arcing and leakage current between said metal electrode layers along said orthogonal edges.
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Accused Products
Abstract
A high energy density, high power density capacitor having an energy density of at least about 0.5 J/cm3 is provided. The capacitor comprises a plurality of interleaved metal electrode layers separated by a polymer layer. The interleaved metal electrode layers terminate at opposite ends in a solder termination strip. The high energy density aspect of the capacitors of the invention is achieved by at least one of the following features: (a) the dielectric thickness between the interleaved metal electrode layers is a maximum of about 5 μm; (b) the polymer is designed with a high dielectric constant κ of at least about 3.5; (c) the metal electrode layers within the polymer layer are recessed along edges orthogonal to the solder termination strips to prevent arcing between the metal electrode layers at the edges; and (d) the resistivity of the metal electrode layers is within the range of about 10 to 500 ohms per square, or a corresponding thickness of about 200 to 30 Å.
76 Citations
12 Claims
- 1. A high energy density multilayer capacitor having an energy density of at least about 0.5 J/cm3, said capacitor comprising a plurality of interleaved, vacuum-deposited metal electrode layers, each layer separated by vacuum-deposited, radiation-cured polymer dielectric layers, thereby defining an active capacitor region, said interleaved metal electrode layers terminating at opposite ends in a multilayer sputtered, solder-coated termination strip, said metal electrode layers recessed into said polymer dielectric layers along edges orthogonal to said opposite ends, thus creating a non-conducting region, to protect against arcing and leakage current between said metal electrode layers along said orthogonal edges.
Specification