Embedded magnetic component device
First Claim
1. An embedded magnetic component device, comprising:
- an insulating substrate including a first side and a second side opposite the first side, and including a cavity therein, the cavity including an inner and an outer periphery;
a magnetic core included in the cavity; and
an electrical winding that extends through the insulating substrate and around the magnetic core;
whereinthe electrical winding includes;
upper conductive traces located on the first side of the insulating substrate;
lower conductive traces located on the second side of the insulating substrate;
inner conductive connectors extending through the insulating substrate adjacent to the inner periphery of the magnetic core, the inner conductive connectors respectively defining electrical connections between respective upper conductive traces and respective lower conductive traces; and
outer conductive connectors extending through the insulating substrate adjacent to the outer periphery of the magnetic core, the outer conductive connectors respectively define electrical connections between respective first upper conductive traces and respective first lower conductive traces;
whereinthe outer conductive connectors include a first set of outer conductive connectors and a second set of outer conductive connectors;
the first set of outer conductive connectors are located along the outer periphery of the cavity and are spaced from the outer periphery of the cavity by a first distance;
the second set of the outer conductive connectors are located adjacently without the first set of outer conductive connectors in between and at a greater distance from the outer periphery of the cavity than the first set of outer conductive connectors;
each of the first and second set of outer conductive connectors is electrically connected to one of the inner conductive connectors through one of the upper conductive traces or one of the lower conductive traces;
two outer conductive connectors of the second set of outer conductive connectors are located directly adjacent to respective ones of the first set of outer conductive connectors;
in a thickness direction of the insulating substrate, either;
the upper conductive traces connected to the first set of outer conductive connectors do not overlap with the upper conductive traces connected to the second set of outer conductive connectors;
orthe lower conductive traces connected to the first set of outer conductive connectors do not overlap with the lower conductive traces connected to the second set of outer conductive connectors; and
adjacent inner conductive connectors connected to the second set of the outer conductive connectors are located at different distances from the cavity.
1 Assignment
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Accused Products
Abstract
A magnetic core is situated in a cavity routed into an insulating substrate. The cavity and magnetic core are coved with a first insulating layer. Through holes are then formed through the first insulating layer and the insulating substrate, and plated to form conductive vias. Metallic traces are added to the exterior surfaces of the first insulating layer and the insulating substrate to form upper and lower winding layers. The metallic traces and conductive vias define the respective primary and secondary side windings for an embedded transformer. At least a second set of the outer conductive vias, are spaced farther from the cavity than a first set, and have greater via hole diameter than the vias in the first set. This reduces the resistance of the windings for a given substrate size and improves the performance of the device.
9 Citations
12 Claims
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1. An embedded magnetic component device, comprising:
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an insulating substrate including a first side and a second side opposite the first side, and including a cavity therein, the cavity including an inner and an outer periphery; a magnetic core included in the cavity; and an electrical winding that extends through the insulating substrate and around the magnetic core;
whereinthe electrical winding includes; upper conductive traces located on the first side of the insulating substrate; lower conductive traces located on the second side of the insulating substrate; inner conductive connectors extending through the insulating substrate adjacent to the inner periphery of the magnetic core, the inner conductive connectors respectively defining electrical connections between respective upper conductive traces and respective lower conductive traces; and outer conductive connectors extending through the insulating substrate adjacent to the outer periphery of the magnetic core, the outer conductive connectors respectively define electrical connections between respective first upper conductive traces and respective first lower conductive traces;
whereinthe outer conductive connectors include a first set of outer conductive connectors and a second set of outer conductive connectors; the first set of outer conductive connectors are located along the outer periphery of the cavity and are spaced from the outer periphery of the cavity by a first distance; the second set of the outer conductive connectors are located adjacently without the first set of outer conductive connectors in between and at a greater distance from the outer periphery of the cavity than the first set of outer conductive connectors; each of the first and second set of outer conductive connectors is electrically connected to one of the inner conductive connectors through one of the upper conductive traces or one of the lower conductive traces; two outer conductive connectors of the second set of outer conductive connectors are located directly adjacent to respective ones of the first set of outer conductive connectors; in a thickness direction of the insulating substrate, either; the upper conductive traces connected to the first set of outer conductive connectors do not overlap with the upper conductive traces connected to the second set of outer conductive connectors;
orthe lower conductive traces connected to the first set of outer conductive connectors do not overlap with the lower conductive traces connected to the second set of outer conductive connectors; and adjacent inner conductive connectors connected to the second set of the outer conductive connectors are located at different distances from the cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification