Frame type film inductor based on closed magnetic circuit and manufacturing method thereof

Abstract

The invention relates to a frame type film inductor based on a closed magnetic circuit and a manufacturing method thereof. The inductor comprises a lower magnetic core layer, a lower insulated layer, coils, coil magnetic films, an upper insulated layer, an upper magnetic core layer, wherein the upper insulated layer and the lower insulated layer are respectively arranged on the top surface and the bottom surface of the coil; the upper magnetic core layer is arranged on the top surface of the upper insulated layer; the lower magnetic core layer is arranged on the bottom surface of the lower insulated layer; the coils comprise a plurality of coils which are divided into two rows and are alternatively arranged; no insulated layers are arranged in the hollow areas of the coils; the coil magnetic films are arranged in the hollow areas of the coils; the magnetic films on the upper magnetic core layer and the lower magnetic core layer are connected through the coil magnetic films in the hollow areas of the coils; adjacent coil magnetic films in the hollow areas of two different rows of coils are connected with the magnetic films in the lower magnetic core layer in an extending manner through the upper magnetic core layer to form a film inductance with a closed magnetic path. According to the frame type film inductor disclosed by the invention, magnetic leakage is reduced, mutual inductance between coils is improved, an inductance value is increased, and the manufacturing process is simple.

Description

technical field [0001] The invention relates to a frame-type thin-film inductor based on a closed magnetic circuit and a manufacturing method thereof, and belongs to the innovative technology of the frame-type thin-film inductor based on a closed magnetic circuit and a manufacturing method thereof. Background technique [0002] As one of the three important passive devices in the circuit structure, inductors are key components of functional modules such as power supplies, transformers, passive filters, oscillators, and low-noise amplifiers. They are widely used in various communication equipment and other fields. Applications. The emergence of thin-film inductors makes the inductor move from a three-dimensional structure to a two-dimensional structure, effectively reducing the quality and volume of the inductor. The performance of thin film inductors is mainly affected by the coil shape and core material of thin film inductors. At present, in the research of thin film indu...

AI Technical Summary

Problems solved by technology

However, in terms of the shape of the coil, the spiral type of thin film inductors has always been the mainstream. The process is simpler and the inductance is larger, but the inductance connection point, one end of which is in the center of the coil, makes the wiring more complicated.

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