High Current, Low Equivalent Series Resistance Printed Circuit Board Coil for Power Transfer Application
First Claim
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1. A method for fabricating an electric coil on a circuit board comprising:
- fabricating on the circuit board a first coil layer comprising a coil trace and a plurality of vias distributed along the length of the coil trace; and
overlaying a second coil layer on the first coil layer,wherein the vias of the first coil layer join the first coil layer and the second coil layer.
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Abstract
A method for fabricating an electric coil on a circuit board comprising fabricating on the circuit board a first coil layer comprising a coil trace and a plurality of vias distributed along the length of the coil trace, and overlaying a second coil layer on the first coil layer, wherein the vias of the first coil layer join the first coil layer and the second coil layer.
40 Citations
23 Claims
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1. A method for fabricating an electric coil on a circuit board comprising:
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fabricating on the circuit board a first coil layer comprising a coil trace and a plurality of vias distributed along the length of the coil trace; and overlaying a second coil layer on the first coil layer, wherein the vias of the first coil layer join the first coil layer and the second coil layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for reducing an overall thickness of a multilayer coil for wireless electrical power transfer, comprising:
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fabricating a first coil layer comprising a first winding trace; overlaying and distributing a plurality of vias across the first coil layer; and overlaying on the vias a second coil layer comprising a second winding trace substantially similar to the winding trace, wherein the spaces between the vias are determined to increase the vias coverage of the surfaces of the first coil layer and the second coil layer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for a multilayer printed circuit board (PCB) coil, comprising:
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a first coil layer of a PCB; a plurality of vias coupled to and distributed to cover substantially the surface of the first coil layer within the PCB; and a second coil layer of the PCB and coupled to the vias to cover substantially the surface of the second coil layer, wherein the vias are positioned between the first coil layer and the second coil layer and enable substantially high current and low equivalent series resistance (ESR) for the multilayer PCB coil. - View Dependent Claims (20, 21, 22, 23)
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Specification