High-frequency absorptive film of capacitor

Abstract

The invention relates to a high-frequency absorptive film of a capacitor. Four layers of films are wound coaxially to form a capacitor core; the film comprises a first metallized film, a second metallized film, a third metallized film and a fourth metallized film sequentially from inside to outside; the first metallized film is a two-side metallized film; the third metallized film is a single-side metallized film; the second metallized film and the fourth metallized film are optical films. According to the high-frequency absorptive film of the capacitor disclosed by the invention, the volume of the capacitor is smaller than that of a capacitor which is formed from a conventional winding structure in a winding manner at the presence of the same voltage-tolerant strength; in addition, the current tolerance of the capacitor is increased, the high-frequency impact tolerance is also increased a lot, and the practical use requirements are satisfied.

Description

technical field [0001] The invention relates to a metallized film, in particular to a high-frequency absorbing film for a capacitor, and belongs to the technical field of electronic components. Background technique [0002] At present, the high-frequency absorbing capacitor commonly used in the market, the metallized film winding method is to add a light film between two layers of aluminum foil to form a capacitor core, such as figure 1 shown. However, in the actual production process, because the thickness of the aluminum foil is relatively thick, the contact between the film and the light film is not dense, and the coiled capacitor core is relatively loose. In the subsequent process, impurities are easy to enter the core, and the yield is relatively low. , and the volume of the rolled capacitor is relatively large, which cannot meet the increasing miniaturization and miniaturization requirements. Contents of the invention [0003] The present invention aims at the defi...

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Problems solved by technology

However, in the actual production process, because the thickness of the aluminum foil is relatively thick, the contact between the film and the light film is not dense, and the coiled capacitor core is relatively loose. In the s...

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