Stack coil device and manufacturing method thereof

Abstract

A stacked coil device comprising: an inner electrode layer formed of at least two layers and having a non-magnetic electrode layer and an inner magnetic layer as one unit, the non-magnetic electrode layer provided with an opening at a center thereof and provided with an electrode pattern on at least one surface of an upper surface and a lower surface thereof and the inner magnetic layer positioned at the center opening and a lateral surface of the non-magnetic electrode layer; a cover layer in contact with both surfaces of the inner electrode layer; and an external electrode terminal partially and electrically connected to the electrode pattern.

Description

technical field [0001] The present invention relates to stacked coil arrangements, and more particularly to coil arrangements that can be used as transformers, common mode choke coils, and the like. Background technique [0002] Generally, in order to enhance the electrical characteristics of a coil device such as a common mode choke coil or a transformer, it is necessary to increase the electromagnetic coupling between the first coil and the second coil. To increase the electromagnetic coupling between the first and second coils, the interval between the first and second coils must be small, or the magnetic circuit formed must not generate leakage flux. [0003] FIG. 1A is a perspective view showing a common mode choke coil including a prior art coil device, and FIG. 1B is an exploded view of the common mode choke coil of FIG. 1A . [0004] As shown in FIG. 1A , the common mode choke coil 1 includes a stack body 7 formed on the top of the first magnetic substrate 3 , a sec...

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Problems solved by technology

Therefore, leakage magnetic flux is generated, so the improvement of electromagnetic coupling and impedance characteristics is limited

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