Surface mount coil unit and application thereof

Abstract

The invention discloses a surface mount coil unit and application thereof. The surface mount coil unit is provided with a base plate, wherein the base plate can be made of a magnetic material or a material without magnetism; the lower surface of the base plate is provided with a conductive pattern; two opposite ends of the base plate are provided with a via hole respectively; conductors are filled in the via holes; the conductors are communicated with the conductive pattern on the lower surface of the base plate; the upper surface of the base plate is also provided with a magnetic material layer; a conductor coil with an insulating layer on the surface is arranged on the upper side of the magnetic material layer; two outlet ends of the conductor coil are electrically connected with the conductors of the via holes; the external parts of the conductor coils are wrapped by the magnetic material layer; thus the surface mount coil unit is manufactured; the number of conductor coils is one or more than one which is laminated aiming at power inductance, filter or transformation effects and the like, and the integral package can be finished without using a wire rack.

Description

technical field [0001] The invention relates to a surface-mounted coil unit and its application, in particular, it means that the overall package can be completed without using a lead frame, and the conductor coil on the substrate can be used as a unit for power inductance, filtering or voltage transformation, etc. or more than one stacked type. Background technique [0002] Existing inductance coils such as Figure 1A to Figure 1C As shown, a coil 10 is pasted on a circuit board 12. A shell 14 is arranged outside the coil 10, and a first lead 16 and a second lead 18 extend outward from the shell 14. The first The wire 16 and the second wire 18 are respectively connected to soldering points 20 and 22 on the circuit board. [0003] The coil 10 is a helical winding body 24 wound with an upright flat wire with a right-angled cross section, and is provided with an inner end 26 and an outer end 28, so that before the winding body 24 is molded, a wire The two ends 34, 38 of the ...

AI Technical Summary

Problems solved by technology

[0004] Existing inductance coils can only be implemented by welding the lead frame when molding, which will not only affect production efficiency, but also increase manufacturing costs

Moreover, existing coils often only have a single function, and individual coils need to be manufactured individually for functions such as power inductance, filtering, or voltage transformation, which is also one of the reasons why the cost cannot be reduced

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