Patent ID: 9009951
Filing Date: 2015-04-21
Classification: H01F,Y10T

Abstract:
1. A method of fabricating an electromagnetic component comprising: forming a coil portion having a multi-layer stack structure wherein the step of forming the coil portion comprises: providing a substrate; forming a first patterned photoresist layer on the substrate, the first patterned photoresist layer comprising an opening; filling the opening with plated copper, thereby forming a first conductive trace; removing the first patterned photoresist layer; covering the first conductive trace with a dielectric layer having thereon a via hole; plating a copper layer over the dielectric layer, wherein the copper layer fills the via hole; forming a second patterned photoresist layer on the copper layer; and etching the copper layer not covered by the second patterned photoresist layer, thereby forming a second conductive trace stacked on the first conductive trace, wherein the first and second conductive traces constitute a winding of the coil portion; forming a molded body to encapsulate the coil portion, wherein the molded body comprises a magnetic material; and forming two electrodes to electrically connected to two terminals of the coil portion respectively.