A film capacitor includes a pair of mutually opposed dielectric films; and evaporated electrodes respectively provided on the pair of dielectric films. The evaporated electrode provided on one of the pair of dielectric films includes slits that are regions in which the evaporated electrode is not provided, a plurality of electrode regions defined by the slits, and at least one fuse portion that connects the electrode regions adjacent to each other. The one dielectric film, on which the evaporated electrode including the slits and the at least one fuse portion is provided, includes at least one through portion that extends through the one dielectric film, the at least one through portion being provided in at least one area corresponding to at least one of the slits adjacent to the at least one fuse portion.

A capacitor includes a first conductive plate, a second conductive plate, a floating conductive plate and a dielectric material separating the floating conductive plate from the first conductive plate and from the second conductive plate. The floating conductive plate has a first surface closer to the first conductive plate than to the second conductive plate and has a second surface closer to the second conductive plate than to the first conductive plate. In response to an electric field between the first conductive plate and the second conductive plate, charge separation is induced in the floating conductive plate such that a first charge induced on the first surface has a first polarity and a second charge induced on the second surface has a second polarity, where the second polarity different from the first polarity.

The present invention relates to a newpolypropylene composition with improved processability and heat resistance for use in a capacitor film, as well as a cast film and a biaxially oriented film for the use as capacitor film comprising such polypropylene composition.

The present invention relates to a newpolypropylene composition with improved processability and heat resistance for use in a capacitor film, as well as a cast film and a biaxially oriented film for the use as capacitor film comprising such polypropylene composition.

The present invention relates to a method for forming a capacitor having carbon or metal electrodes and an electrolyte which is also a source of electropolymerisable anions. Applying a sufficiently positive voltage, a thin dielectric layer forms at the positive electrode, enabling the use of cell voltages higher than 3.5 V. The construction and characteristics of capacitors with 5, 6.3, and 10 V of cell voltages, having reduced graphene oxide electrodes and an ionic liquid electrolyte, are shown. Further, a method of forming a capacitor, including the steps of: (a) providing a first electrode; (b) providing a first electrolyte including an anionic compound, wherein said compound includes at least one cyano group or at least one nitrile group; (c) electropolymerising said anionic compound in order to form a dielectric layer on at least part of the first electrode; (d) forming a capacitor including the electrode of step (c), a second electrode and a second electrolyte, which is the same or different to the first electrolyte, is claimed. In a further aspect of the invention, there is provided an electronic device including a capacitor, a transistor or an electrode produced by means of a method as defined above. It is believed that a number of dielectric compounds produced by the method as defined above are new compounds not previously isolated. Accordingly, polytetracyanoborate, polycyani, or polytricyanomethanide.

The present invention is directed to a biaxially oriented polypropylene (BOPP) film with improved breakdown strength and to a capacitor comprising an insulation film comprising a layer of the biaxially oriented polypropylene film of the present invention. The present invention is further directed to a process for producing a biaxially oriented polypropylene film. Finally, the present invention is further directed to the use of a biaxially oriented polypropylene film of the present invention as layer of an insulation film of a capacitor. The BOPP film comprises a polypropylene composition, wherein the polypropylene composition comprises a high isotactic homopolymer of propylene and a polymeric α-nucleating agent. The BOPP film has a dielectric breakdown field strength Eb63.2 of at least 595 kV/mm. The process for producing a biaxially oriented polypropylene film comprises the steps of extruding a polypropylene composition to a flat film and orienting the flat film simultaneously in the machine direction and in the transverse direction.

The present invention is directed to a biaxially oriented polypropylene (BOPP) film with improved breakdown strength and to a capacitor comprising an insulation film comprising a layer of the biaxially oriented polypropylene film of the present invention. The present invention is further directed to a process for producing a biaxially oriented polypropylene film. Finally, the present invention is further directed to the use of a biaxially oriented polypropylene film of the present invention as layer of an insulation film of a capacitor. The BOPP film comprises a polypropylene composition, wherein the polypropylene composition comprises a high isotactic homopolymer of propylene and a polymeric α-nucleating agent. The BOPP film has a dielectric breakdown field strength Eb63.2 of at least 595 kV/mm. The process for producing a biaxially oriented polypropylene film comprises the steps of extruding a polypropylene composition to a flat film and orienting the flat film simultaneously in the machine direction and in the transverse direction.

A meta-dielectric film usable in a capacitor includes composite molecules with a resistive envelope built with alkyl oligomeric single chain or branched chain oligomers having carbo-hydrogen or carbo-fluoro composition and a polarizable core molecular fragment inside the resistive envelope. The polarizable core has an electronic or ionic type of polarizability provided by electronic conductivity of the core molecular fragment or limited mobility of ionic parts of the core molecular fragment.

A film capacitor that includes a laminate having a first resin film including a first metal layer on a surface thereof alternately laminated with a second resin film including a second metal layer on a surface thereof, the laminate having opposed first and second ends, a first external electrode on the first end of the laminate, and a second external electrode on the second end of the laminate, wherein the first resin film protrudes more than the second resin film by a first protruding length of 0.5 mm to 3 mm on the first end of the laminate, and the first resin film has a Young's modulus at 150° C. of 0.6 GPa or more in a direction perpendicular to a lamination direction of the laminate and parallel to a direction from the first end to the second end of the laminate.

An organic co-polymeric compound characterized by polarizability and resistivity has a general structural formula:

##STR00001##

P1 and P2 are structural units selected from acrylate, methacrylate, repeat units for polypropylene (PP), repeat units for polyethylene (PE), siloxane, and repeat units for polyethylene terephthalate. Tail is a resistive substitute that includes an oligomer of a polymeric material and n is a number of P1-Tail repeat units. Q is an ionic functional group, which is connected to the structural unit P2 via a linker group L, and m is a number of P2-L-Q repeat units. The ionic functional group Q comprises one or more ionic liquid ions, zwitterions, or polymeric acids. B is a counter ion in the form of a molecule or oligomer that can supply an opposite charge to balance a charge of the co-polymer, and s is the number of the counter ions in the compound.