In an embodiment a capacitor includes a dielectric layer including a polyamideimide, the dielectric layer being uniform and a first electrode disposed directly adjacent to the dielectric layer.

A film capacitor includes a main body portion including a dielectric film and a metal film; and external electrodes, and the external electrodes are disposed at a pair of main body ends in a first direction of the main body portion, respectively. The metal film includes a first portion connected to one of the external electrodes which is disposed at one of the main body ends, a second portion disposed at the other main body end, and a third portion disposed between the first portion and the second portion in the first direction, and a film thickness of the third portion is smaller than a film thickness of the second portion.

A metalized film includes a dielectric film having a strip-shape, and a metal vapor-deposited electrode which is formed on a surface of the dielectric film. An insulation margin is provided on a first end portion which is located at one end in a width direction of the dielectric film. A plurality of first slits each extending in a longitudinal direction of the dielectric film and a fuse disposed between a corresponding pair of the plurality of first slits are provided close to a second end portion which is located at the other end in the width direction. The metal vapor-deposited electrode includes a plurality of divided electrodes which are separated by a corresponding one of a plurality of second slits, and are arranged in the longitudinal direction. Each of the plurality of second slits extends from the insulation margin to a corresponding one of the plurality of first slits. When the metalized film is cut along a cutting line extending in the width direction, at least two divided electrodes among the plurality of divided electrodes are respectively cut into pieces at the cutting line.

A capacitor (1) includes a main body (10) in which dielectric layers (13) and electrode layers (11) are laminated, and an external electrode (20) connected to at least a part of the main body by metallikon. Each dielectric layer has a thickness Dt at a connection boundary (18) where the main body is connected to the external electrode, each electrode layer has a thickness Et at the connection boundary, and a ratio between the thickness Dt and the thickness Et is at least a first value DEmin. The first value DEmin may satisfy the following conditions with respect to a minimum set value Dt1 of the thickness Dt

[00001]$\mathrm{DE}\min ?a?\mathrm{Dt}1+b$$0.1\mathrm{?m}?\mathrm{Dt}1?\mathrm{Dt}?1.5\mathrm{?m}$

where a and b are coefficients.

A film for a capacitor having a plurality of layers, the film for capacitors satisfying the following relational expression (1): Cmo/Cmu1.1 wherein Cmu is an oxygen gas permeability coefficient of the film for the capacitor, and Cmo is an oxygen gas permeability coefficient of an equivalent film that would be obtained if the film for the capacitor were to be formed as a uniform single layer, and having a thickness of 1 to 35 m.

In a method of manufacturing a thin-film polymer multi-layer capacitor, in a vacuum chamber, a resin thin film layer forming step of forming a resin thin film layer by forming a monomer layer by vapor-depositing a monomer and thereafter by curing the monomer layer by irradiating an electron beam onto the monomer layer, and a metal thin film layer forming step of forming a metal thin film layer by vapor-depositing a metal material are alternately performed on a rotary drum thus forming a multi-layer body in which the resin thin film layer and the metal thin film layer are alternately laminated on the rotary drum. In the resin thin film layer forming step, the monomer layer is formed using a dimethacrylate compound having an alicyclic hydrocarbon skeleton expressed by a following chemical formula (1) as the monomer. ##STR00001## wherein, symbol A indicates an organic group containing alicyclic hydrocarbon.

There is provided a method of manufacturing a capacitor (1), the capacitor (1) including a main body (10) in which dielectric layers (13) and electrode layers (11) are alternatively laminated, with at least part of the main body connected to external electrodes (20). The method of manufacturing includes a step (89) of forming an electrode layer on a dielectric layer. The forming of the electrode layer includes: a step (83) of forming a first metal layer including a connecting part, which is connected to the external electrode, and an internal electrode part; and a step (85) of forming a second metal layer on the connecting part. In addition, the method includes a step (82) of patterning to form the first pattern and a step (84) of patterning to form the second pattern using a second material that evaporates when the second metal layer is formed.

A capacitor (1) includes a main body (10) in which a dielectric layer (13) and an electrode layer (11) are laminated, and an external electrode (20) connected to at least a part of the main body. The electrode layer (11) includes a heavy edge portion (16) with a connecting part (18), which connects to the external electrode and is thicker than an internal electrode part (15). The capacitor (1) further includes an edge support layer (12) that is made of metal and is laminated on the heavy edge portion (16).

A film capacitor includes a first electrode layer, a second electrode layer, and a dielectric film disposed between the first and second electrode layers. The dielectric film mainly contains a styrene polymer having a syndiotactic structure. The first electrode layer includes first small electrode segments and a first fuse which interconnects the first small electrode segments. A value obtained by dividing an area of each of the plurality of first small electrode segments by the third power of a thickness of the dielectric film is not smaller than 0.410.sup.13/m and not larger than 5.010.sup.13/m. The film capacitor has a high withstanding voltage.

In a method of manufacturing a thin-film polymer multi-layer capacitor, in a vacuum chamber, a resin thin film layer forming step of forming a resin thin film layer by forming a monomer layer by vapor-depositing a monomer and thereafter by curing the monomer layer by irradiating an electron beam onto the monomer layer, and a metal thin film layer forming step of forming a metal thin film layer by vapor-depositing a metal material are alternately performed on a rotary drum thus forming a multi-layer body in which the resin thin film layer and the metal thin film layer are alternately laminated on the rotary drum. In the resin thin film layer forming step, the monomer layer is formed using a dimethacrylate compound having an alicyclic hydrocarbon skeleton expressed by a following chemical formula (1) as the monomer.

##STR00001## wherein, symbol A indicates an organic group containing alicyclic hydrocarbon.