Implantable medical device including a molded planar transformer
AssigneeMedtronic, Inc.
InventorsMark R. Boone, Mohsen Askarinya, Mark S. Ricotta, Lejun Wang
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Abstract
The present disclosure provides methods and techniques associated with a planar transformer for an apparatus. The planar transformers include a substrate carrying electronic components, an upper core bonded on a first exterior surface of the substrate, and a lower core bonded on a second exterior surface opposed to the first side of the substrate. The electronic components include primary windings and secondary windings associated with the transformer. In some embodiments, the transformer includes encapsulant material that is dispensed over and between the components of the transformer to seal air gaps.
Claims25
A method of assembling a transformer, comprising:
- providing a substrate having a plurality of substrate units, each of the substrate units including electronic components mounted on a top surface of the substrate units;
- providing an adhesive material having first and second opposing surfaces;
- mounting a bottom surface of the substrate to the first opposing surface of the adhesive material;
- mounting a carrier plate to the second opposing surface of the adhesive material;
- placing an upper magnetic core over each of the substrate units, wherein each of the substrate units includes an array of depressions formed on the top surface for receiving the upper magnetic core;
- encapsulating the substrate units with an encapsulant material, wherein the encapsulant material is dispensed over an exposed exterior surface of each of the substrate units and within gaps formed between the electronic components and the substrate units;
- unmounting the substrate from the adhesive material;
- and
- attaching a lower magnetic core over the bottom surface of each of the substrate units.
An implantable medical device having electronic circuitry operable to perform a therapeutic and/or monitoring function, comprising:
- a battery;
- a capacitor;
- and
- a transformer coupled to the battery and the capacitor, wherein the transformer includes:
- a substrate unit having electronic components and one or more electrical terminals exposed on an exterior surface of the substrate unit;
- an upper magnetic core disposed over the substrate unit, wherein the substrate unit includes an array of depressions formed on a top surface for receiving the upper magnetic core;
- an encapsulant material dispensed over the upper magnetic core of the substrate unit and between one or more gaps formed between the substrate unit and the electronic components, wherein the encapsulant material is formed to expose a surface of the upper magnetic core that is parallel to the top surface;
- and
- a lower magnetic core bonded to the bottom surface of the substrate unit.
Dependencies are inferred from the claim text.