Back to results
US 8,093,983 B2Granted
Narrowbody coil isolator
AssigneeAvago Technologies ECBU IP (Singapore) Pte. Ltd.
InventorsJulie Fouquet, Dominique Ho
Life of this patent
Estimating the term…
Abstract
Disclosed herein are various embodiments of narrowbody coil isolators containing multiple coil transducers, where integrated circuits are not stacked vertically over the coil transducers. The disclosed coil isolators provide high voltage isolation and high voltage breakdown performance characteristics in small packages that provide a high degree of functionality at a low price.
Claims41
A coil isolator, comprising:
- a coil transducer having opposing first and second ends and comprising a dielectric barrier having opposing first and second sides, the dielectric barrier comprising an electrically insulating, non-metallic, non-semiconductor, low-dielectric-loss material, a first electrically conductive transmitter coil disposed near or on the first side, first leads extending between the first coil and wire bond pads corresponding thereto, and a second electrically conductive receiver coil disposed near or on the second side, second leads extending between the second coil and wire bond pads corresponding thereto, the dielectric barrier being disposed between the first and second coils, and
- at least first and second lead frames;
- wherein the coil transducer extends horizontally between the first and second lead frames and the first and second ends extend onto or beneath at least portions of the first and second lead frames, no portions of the first and second lead frames are disposed vertically over or beneath any portions of the first and second coils, and the wire bond pads of the first and second coils are disposed vertically over or beneath the first and second lead frames, respectively.
A method of making a coil isolator, comprising:
- forming a coil transducer having opposing first and second ends and comprising a dielectric barrier having opposing first and second sides, the dielectric barrier comprising an electrically insulating, non-metallic, non-semiconductor, low-dielectric-loss material, a first electrically conductive transmitter coil disposed near or on the first side, first leads extending between the first coil and wire bond pads corresponding thereto, and a second electrically conductive receiver coil disposed near or on the second side, second leads extending between the second coil and wire bond pads corresponding thereto, the dielectric barrier being disposed between the first and second coils;
- providing at least first and second lead frames, and
- attaching the coil transducer to the first and second lead frames such that the coil transducer extends horizontally between the first and second lead frames and the first and second ends extend onto or beneath at least portions of the first and second lead frames, no portions of the first and second lead frames are disposed vertically over or beneath any portions of the first and second coils, and the wire bond pads of the first and second coils are disposed vertically over or beneath the first and second lead frames, respectively.
Dependencies are inferred from the claim text.