High-self-healing sheet resistance thin film capacitor

Abstract

The invention relates to a self-healing high-resistance film capacitor, which belongs to the technical field of capacitors. The film electrode in the capacitor is cut from a metallized film, and the metallized film includes a base film, and the base film is uniformly A layer of Al is vapor-deposited, and a layer of Zn with a cross-section in the shape of "Ω" is vapor-deposited on the Al layer, and blank areas are formed after the two sides of the metallized film exceed the Al layer and the Zn layer. This technical solution uses a metallized film to be cut into two thin film electrodes to ensure that the material and performance of the two thin film electrodes are basically the same, the product has higher stability in use, and the beneficial effect is remarkable.

Description

technical field [0001] The invention relates to a self-healing high-resistance film capacitor, which belongs to the technical field of capacitors. Background technique [0002] At present, capacitors are widely used in the fields of power electronics, communication facilities, and rail transportation. With the development of science and technology, capacitors have become indispensable electronic components to promote the upgrading of the above industries due to their good electrical performance and high reliability. At present, thin-film electrodes are commonly used in capacitors, that is, metallized thin films with uniform thickness and the same square resistance are mostly used in the prior art. [0003] In the actual use of this type of film, it is found that if the thickness of the metal film is thinner, it can produce a larger square resistance, and the self-healing property of the metal coating is better, but the current carrying capacity is low, and the electrodes are...

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Problems solved by technology

[0003] In the actual use of this type of film, it is found that if the thickness of the metal film is thinner, it can produce a larger square resistance, and the self-healing property of the metal coating is better, but the current carrying capacity is low, and the electrode is prone to heat, resulting in a short service life of the capacitor.

However, if a thicker metal coating is used, although the current-carrying capacity is improved to a certain extent, the self-healing of the metal coating requires a large amount of energy, and the self-healing property is poor, and it is prone to breakdown of the electrode film, causing expansion of the capacitor shell or even explosion. Certain potential safety hazards, so how to take into account the self-healing and current-carrying capacity of thin-film electrodes is a difficult problem in the field of thin-film capacitors

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