Embedded coil assembly and method of making
AssigneeTexas Instruments Incorporated
InventorsHaiying Li, Benjamin Michael Sutton, Ming Li
Life of this patent
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Abstract
An embedded coil assembly embodiment includes a ferrite ring having an annular axis. The ferrite ring is positioned on a conductive metal surface. A plurality of separate, spaced apart conductive structures extend over the ferrite ring and are attached to the conductive metal surface in a first region of the conductive surface positioned radially outwardly of the annular axis of the ferrite ring and in a second region of the conductive surface positioned radially inwardly of the annular axis of the ferrite ring. An encapsulation layer covers, the ferrite ring and at least a portion of the plurality of conductive structures.
Claims12
A method of making an embedded coil assembly comprising:
- providing a metal layer having a top surface and a bottom surface;
- patterning and etching the metal layer so as to provide an annular metal layer divided into a plurality of circumferential sections;
- providing metal pillars onto the plurality of circumferential sections, each of the plurality of circumferential sections including an outer metal pillar, an intermediate metal pillar and an inner metal pillar on the metal layer;
- electrically connecting the inner metal pillars and the intermediate metal pillars;
- and
- applying an encapsulant that covers portions of the metal layer, the annular metal layer, and the metal pillars to form the embedded coil assembly, wherein a vertical side of the outer metal pillar of each of the plurality of circumferential sections is exposed from the encapsulant of the embedded coil assembly.
Dependencies are inferred from the claim text.