What is a thin film capacitor?
A film capacitor is a non-polar capacitor that uses organic plastic film as the dielectric and metal foil or metallization layer as the electrode. It is widely used in AC filtering, high-frequency circuits, and high reliability scenarios due to its high stability, low loss, and long lifespan. The following is a detailed analysis of thin film capacitors:
Basic Structure and Manufacturing
Medium material:
Common films: polyester (PET), polypropylene (PP), polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), etc.
Thickness: usually 1-20 μ m, the thinner the film, the higher the capacity density.
Electrode type:
Metal foil electrode: alternating stacking of aluminum foil or zinc foil with thin film (such as foil type thin film capacitor).
Metalized electrode: A nanoscale metal layer is formed on the surface of a thin film by vacuum evaporation (such as a metalized thin film capacitor).
Process: The film and electrode are wound into a cylindrical or flat structure, and wrapped in epoxy resin or plastic shell for encapsulation.
core features
