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US 2016/0111966 A1Published application
Embedded magnetic component transformer device
AssigneeMurata Manufacturing Co., Ltd.
InventorsJing WANG, Lee FRANCIS, Quinn KNELLER
Life of this patent
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Abstract
An embedded transformer device includes first, second, and auxiliary windings, defined in an insulating substrate by conductive vias joined together by conductive traces. The positions of the conductive vias are arranged to optimize the isolation properties of the transformer, while the conductive traces are arranged to optimize the coupling between the primary and secondary side windings. The embedded transformer device provides favourable isolation and energy transfer between input side and output side windings, in a device with a small component size.
Claims15
An embedded transformer 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 housed in the cavity including a first section and a second section;
- a first winding extending through the insulating substrate and around the first section of the magnetic core;
- and
- a second winding extending through the insulating substrate and around the second section of the magnetic core;
- wherein
- the first winding and the second winding are located in separate regions from each other in the insulating substrate;
- each of the first and second windings include:
- 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 an 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 an outer periphery of the magnetic core, the outer conductive connectors respectively defining electrical connections between respective upper conductive traces and respective lower conductive traces;
- the upper and lower conductive traces and the inner and outer conductive connectors define respective turns of the first and second windings;
- one of the first and second windings includes fewer turns than the other first or second windings, and the upper and lower conductive traces of the one of the first and second electrical windings are wider than the upper and lower conductive traces of the other of the first or second electrical windings;
- and
- the upper and/or lower conductive traces of the first winding and the upper and/or lower conductive traces of the second winding are provided on a same layer of the insulating substrate.
14 more elements
An embedded transformer 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 housed in the cavity including a first section and a second section;
- a first winding, extending through the insulating substrate and around the first section of the magnetic core;
- a second winding, extending through the insulating substrate and around the second section of the magnetic core;
- wherein
- the first winding and the second winding are located in separate regions from each other in the insulating substrate;
- each of the first and second windings 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 an 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 an outer periphery of the magnetic core, the outer conductive connectors respectively defining electrical connections between respective upper conductive traces and respective lower conductive traces;
- the upper and/or lower conductive traces of the first winding and the upper and/or lower conductive traces of the second winding are provided on a same layer of the insulating substrate;
- the upper and lower conductive traces and the inner and outer conductive connectors define respective turns of the first and second windings;
- for one of the first and second windings, the upper or lower conductive traces extend in a radial direction from the outer conductive connectors to the inner conductive connectors;
- and
- in a width direction, the upper or lower conductive traces extend perpendicularly or substantially perpendicularly to the radial direction, extending over at least a portion of a space between adjacent outer conductive connectors.
14 more elements
An embedded transformer 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 housed in the cavity including a first section and a second section;
- a first winding, extending through the insulating substrate and around the first section of the magnetic core;
- a second winding, extending through the insulating substrate and around the second section of the magnetic core;
- wherein
- the first winding and the second winding are located in separate regions from each other in the insulating substrate;
- each of the first and second windings 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 an 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 an outer periphery of the magnetic core, the outer conductive connectors respectively defining electrical connections between respective upper conductive traces and respective lower conductive traces;
- the upper and/or lower conductive traces of the first winding and the upper and/or lower conductive traces of the second winding are provided on a same layer of the insulating substrate;
- the upper and lower conductive traces and the inner and outer conductive connectors define respective turns of the first and second windings;
- for at least one of the first and second electrical windings:
- a spacing between at least a portion of adjacent upper conductive traces is smaller than a spacing between adjacent outer conductive connectors;
- and
- a spacing between at least a portion of adjacent lower conductive traces is smaller than a spacing between the adjacent outer conductive connectors.
15 more elements
Dependencies are inferred from the claim text.