An embedded magnetic component device

摘要

A method of manufacturing embedded magnetic component devices, each device including a magnetic core embedded in a cavity formed in an insulating substrate and one or more electrical windings formed around the core, which may be a toroidal shape. A row of cavities 350 for respective magnetic cores is formed in an insulating substrate 301a to 301e. Neighbouring cavities are connected to each other by channels 303 formed in the substrate. Adhesive 318 is applied to the cavity floor throughout the row of cavities 350, and magnetic cores 304a to 304e inserted into the cavities. The cavities and magnetic core 304 are then covered with an insulating layer. Through holes are formed through the first insulating layer and the insulating substrate 301, and conductive vias are formed in these holes. Metallic traces are added to the exterior surfaces of the first insulating layer 305 and the insulating substrate 301 to form upper and lower windings. The metallic traces and conductive vias form the windings for an embedded magnetic component, such as transformer or inductor.