Integrated double-layer vertically wound inductor and manufacturing method thereof

Abstract

The invention provides an integrated double-layer vertical wound inductor, which comprises a magnetic body, a hollow coil and a covered electrode, wherein the magnetic body is formed by pressing magnetic powder; the hollow coil is embedded into the magnetic powder and an integrated structure of the hollow coil and the magnetic body is manufactured through high pressure; the end part of the hollow coil is exposed out of the magnetic body; and the surface of one side, out of which the hollow coil is exposed, of the magnetic body is covered with the covered electrode. Compared with the prior art, the integrated double-layer vertical wound inductor has the advantages of being small in volume, good in performance, high in performance-volume ratio and beneficial to high-density installation, and the integration level of a client is improved. A manufacturing method of the integrated double-layer vertical wound inductor comprises the following steps of (1) carrying out compression molding; (2) carrying out multi-stage temperature sintering and solidifying; (3) adding an anti-oxidation coating; (4) grinding the end surfaces of two sides from which a lead of the hollow coil extends outside; (5) forming symmetrical boning pad positions on the upper surface and the lower surface of a semi-finished product; and (6) arranging the covered electrode.

Description

technical field [0001] The invention relates to the technical field of inductors, in particular to an integrated double-layer vertically wound inductor and a manufacturing method thereof. Background technique [0002] An inductor is an indispensable component of an electronic circuit. It plays the role of filtering, choking and energy storage in the circuit. It is composed of a conductor coil and a magnetic conductor, and the coil is a necessary part of the inductor. The coil is an indispensable carrier of the physical quantity of inductance. Coils with different diameters, shapes, turns and winding methods will directly affect the overcurrent capability, inductance, Q value and temperature resistance level of the inductor. There are mainly two types of coils used in one-piece molding, round copper wire hollow coils and flat wire hollow coils. Among them, the hollow coils wound by round copper wires are generally wound in a single method. The only difference is the size of t...

AI Technical Summary

Problems solved by technology

The flat-wire air-core coil traditionally used in one piece was originally similar to the assembled high-current flat coil. The side-wound single-layer coil is mostly used in low-inductance and high-current inductors, and the volume is larger than 6*6mm, which is not suitable for small-volume integral molding. High current inductor

In addition, the electrodes of traditional SMD inductors are connected to the lead pins of the coil through welding. The welding effect is affected by welding equipment, fixtures, welding materials and welding methods, and it is prone to false welding, false welding, and bruised coils, which will lead to open circuits in the finished product. or short circuit hazard

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