Plastic capacitor
Electronic products are getting lighter, thinner, and compacter in recent years, while at the same time their performance is rapidly improving. To keep up with these advancements, there have been strong demands for compacter capacitors. Materials used for the dielectrics in capacitors include paper, plastic, and ceramic. Plastic is advantageously used because it can be easily processed into a thin film, has high resistivity, and, due to its low hygroscopic property, has higher insulation resistance than paper. A plastic film capacitor is one in which plastic film is utilized as the dielectric of the capacitor. A simple plate PFC is comprised of a dielectric plastic film sandwiched between a pair of metal foil electrode plates. A metallized plastic film capacitor is obtained by winding a metal-deposited film comprising a plastic film and a metal-deposited layer as an electrode formed on the plastic film by vacuum-depositing a metal such as aluminum. The capacitor of this kind is suitable for reducing the sizes, and accordingly, it is widely used.
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