Printed circuit board coil
First Claim
1. A printed circuit board coil for use with a paired coil comprising:
- a substrate;
a plurality of conductor layers, each conductor layer including a plurality of discrete coil segments; and
a plurality of interlayer connectors electrically interconnecting said plurality of discrete coil segments of different layers to define a plurality of discrete filaments, each of said filaments having two filament ends and each of said filaments following substantially identical, but offset, undulations through said plurality of layers.
2 Assignments
0 Petitions
Accused Products
Abstract
A multilayer printed circuit board (“PCB”) coil that simulates a coil formed from litz wire. The PCB includes a plurality of alternating conductor and insulating layers interconnected to cooperatively form the coil. Each conductor layer includes a trace that follows the desired coil shape and is divided into a plurality of discrete conductor segments. The segments are electrically connected across layers to provide a plurality of current flow paths (or filaments) that undulate between the layers in a regular, repeating pattern. The coil may be configured so that each filament spends a substantially equal amount of time in proximity to the paired coil and therefore contributes substantially equally to the self or mutual inductance of the coil. Each conductor layer may include a plurality of associated traces and intralayer connector that interconnected so that each filament undulates not only upwardly/downwardly, but also inwardly/outwardly in a regular, repeating pattern.
83 Citations
26 Claims
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1. A printed circuit board coil for use with a paired coil comprising:
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a substrate; a plurality of conductor layers, each conductor layer including a plurality of discrete coil segments; and a plurality of interlayer connectors electrically interconnecting said plurality of discrete coil segments of different layers to define a plurality of discrete filaments, each of said filaments having two filament ends and each of said filaments following substantially identical, but offset, undulations through said plurality of layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A printed circuit board coil assembly comprising:
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an insulative substrate; a first conductor layer disposed on said substrate, said first conductor layer including a first trace having a plurality of discrete coil conductor segments; a second conductor layer disposed on said substrate on a side opposite said first conductor layer, said second conductor layer including a second trace having a plurality of discrete coil conductor segments; and a plurality of interlayer connectors interconnecting said plurality of discrete coil conductor segments of said first conductive layer with said plurality of discrete coil conductor segments of said second conductive layer in a predetermined pattern to define a plurality of interconnected segments, wherein said plurality of interconnected segments define at least two filaments that undulate in a predetermined pattern between said first conductor layer and said second conductor layer, each of said at least two filaments having an innermost filament end and an outermost filament end. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A multilayer electromagnetic coil for a wireless power connection comprising:
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a first conductor layer having a plurality of discrete coil conductor segments; a second conductor layer disposed adjacent to said first conductor layer, said second conductor layer including a plurality of discrete coil conductor segments; and a plurality of connectors interconnecting said plurality of discrete coil conductor segments of said first layer with said plurality of discrete coil segments of said second layer in a predetermined pattern to define a plurality of interconnected segments, wherein said plurality of interconnected segments define at least two filaments that undulate in a predetermined pattern between said first conductor layer and said second conductor layer, each of said at least two filaments having two filament ends. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification