Coil component and manufacturing method thereof

Abstract

The invention discloses a coil component and a manufacturing method thereof. The coil component includes: a plurality of coated conductive wires (S1, S4) forming a first winding layer wound around a winding core portion and a second winding layer wound around the winding core portion; and a resin coating layer (20) covering the coated conductive wires (S1, S4). A maximum space (W1) between the coated conductive wires (S1, S4) in the first winding layer is narrower than a diameter (as shown in the description) of the coated conductive wires. Therefore, the coil component can ensure higher isolation voltage.

Description

technical field [0001] The present invention relates to a coil component and its manufacturing method, and particularly to a coil component using a drum core and its manufacturing method. Background technique [0002] In recent years, electronic components used in information terminals such as smartphones have been strongly required to be smaller and thinner. Therefore, coil components such as pulse transformers do not use toroidal cores, but surface mount coil components using drum cores are widely used. For example, Patent Document 1 discloses a surface mount type step-up transformer using a drum core. [0003] Coil components using drum cores are also required to be further downsized and thinned. Therefore, the size of the winding core is reduced every year, and in order to secure the required inductance, it is necessary to use a coated wire with a smaller wire diameter. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Pate...

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Problems solved by technology

However, according to studies by the inventors of the present invention, it has been found that when the movement of the covered wire is significant, the insulation withstand voltage is slightly lowered compared to the case where this is not the case.

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