POWER INDUCTOR AND METHOD FOR FABRICATING THE SAME

摘要

A power inductor and its fabrication method are disclosed. The power inductor comprises a lower substrate, a coil provided on the lower substrate, and an intermediate layer which encloses the coil, wherein the lower substrate can be a soft magnetic entrainer or a non-magnetic entrainer. The coil is made of a conductive wire coated with insulated layer, and the intermediate layer is a material consisting of magnetic properties. The steps of fabrication consists of: forming a base conductive pole on the upper surface of the lower substrate, putting the coil connected to said base conductive pole, and enveloping said coil with magnetic material.

主权项

1. A method for fabricating a power inductor comprising the steps of:
preparing a lower substrate from a material having a thickness of 1 μm˜500 μm with heat conductive coefficient greater than 0.5 w/mk; forming a basic conductive electrode pattern having a plurality of separated conductive electrodes on said lower substrate; forming a bottom layer material colloid of magnetic properties on said lower substrate; placing a coil on the surface of said bottom layer material colloid, wherein said coil is placed between two separated electrodes, and the two ends of coil are connected to said two separated electrodes respectively, then said two separated electrodes are electrically connected; forming an upper layer material colloid of magnetic properties onto said coil and envelope it completely, so as to form the main body of power inductor having two electrodes exposed at two sides of the main body; and finally, forming said electrodes on both sides of said power inductor main body to obtain a product of surface mounting device.