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US 10,573,457 B2Granted
Embedded magnetic component transformer device
AssigneeMurata Manufacturing Co., Ltd.
InventorsJing Wang, Quinn Kneller, Scott Parish
Life of this patent
Estimating the term…
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 and to reduce the coupling of the transformer by increasing the leakage inductance. The embedded transformer device provides better isolation between input side and output side windings, and allows an oscillating LC circuit to be set up in the case of a short circuit, preventing high power from extending between the input and output terminals and thereby avoiding damage to the connected electrical components.
Claims20
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 such that a first boundary around the first winding does not overlap a second boundary around the second winding;
- 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 inner conductive connectors of the first winding are arranged in a plurality of curved rows, each of the plurality of curved rows being positioned at a constant or substantially constant distance from an inner periphery of the cavity;
- the inner conductive connectors of the second winding are arranged in a first curved row positioned at a constant or substantially constant distance from the inner periphery of the cavity that is large enough to allow a second curved row of inner conductive connectors to be accommodated between the first curved row and the inner periphery of the cavity;
- and
- the outer conductive connectors of the second winding are arranged in a first curved row positioned at a constant or substantially constant distance from the outer periphery of the cavity that is large enough to allow a second curved row of outer conductive connectors to be accommodated between the first curved row and the outer periphery of the cavity.
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 such that a first boundary around the first winding does not overlap a second boundary around the second winding;
- 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 inner conductive connectors of the first winding are arranged in two or more first curved rows, each of the two or more first curved rows being positioned at a constant or substantially constant distance from an inner periphery of the cavity;
- the inner conductive connectors of the second winding are arranged in one or more second curved rows, each of the one or more second curved rows being positioned at a constant or substantially constant distance from the inner periphery of the cavity;
- and
- a minimum distance between the inner conductive connectors of the second winding and the magnetic core is greater than a minimum distance between the inner conductive connectors of the first winding and the magnetic core.
13 more elements
A method of manufacturing an embedded transformer device, comprising:
- a) preparing 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;
- b) inserting a magnetic core into the cavity;
- c) forming a first winding, extending through the insulating substrate and around a first section of the magnetic core;
- d) forming a second winding, extending through the insulating substrate and around a 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 such that a first boundary around the first winding does not overlap a second boundary around the second winding;
- 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 forming 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 forming electrical connections between respective upper conductive traces and respective lower conductive traces;
- e) arranging the inner conductive connectors of the first winding in a plurality of curved rows, each of the plurality of curved rows being positioned at a constant or substantially constant distance from an inner periphery of the cavity;
- f) arranging the inner conductive connectors of the second winding in a first curved row positioned at a constant or substantially constant distance from the inner periphery of the cavity that is large enough to allow a second curved row of inner conductive connectors to be accommodated between the first curved row and the inner periphery of the cavity;
- and
- g) arranging the outer conductive connectors of the second winding in a first curved row positioned at a constant or substantially constant distance from the outer periphery of the cavity that is large enough to allow a second curved row of outer conductive connectors to be accommodated between the first curved row and the outer periphery of the cavity.
13 more elements
Dependencies are inferred from the claim text.