Flat electric coil
First Claim
1. A miniaturized multi-layer flat electric coil comprising a substrate which carries a stack formed of a number of conductor layers, a first conductor layer having a number n of conductor tracks each forming a single spiral having an inner end and an outer end, the nth spiral being situated within the n-1st spiral, a second conductor layer having a number n of conductor tracks each forming a single spiral having an inner end and an outer end, the nth spiral being also situated within the n-1st spiral, and an electrically insulating layer having windows and interposed between the first and second conductor layers to separate said conductor layers from each other, said windows being located to provide electric interconnections between the adjacent first and second conductor layers such that the single spirals of the first and second conductor layers are interconnected to form one multiple spiral having a uniform sense of rotation in which successive single spirals are situated alternately in the first and in the second conductor layer.
1 Assignment
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Accused Products
Abstract
A miniaturized electric coil having a low self-capacitance comprises a bottom conductor pattern provided on a substrate, an insulating intermediate layer and a top conductor pattern which is connected to the bottom conductor pattern via windows in the intermediate layer. The bottom and top conductor layers each comprise n single spiral-like paths. The inner end of the first spiral of the bottom conductor layer contacts the outer end of the first spiral of the top conductor layer, while the inner end of the first spiral of the top conductor layer in its turn contacts the outer end of the second spiral of the bottom conductor layer, and so on.
97 Citations
9 Claims
- 1. A miniaturized multi-layer flat electric coil comprising a substrate which carries a stack formed of a number of conductor layers, a first conductor layer having a number n of conductor tracks each forming a single spiral having an inner end and an outer end, the nth spiral being situated within the n-1st spiral, a second conductor layer having a number n of conductor tracks each forming a single spiral having an inner end and an outer end, the nth spiral being also situated within the n-1st spiral, and an electrically insulating layer having windows and interposed between the first and second conductor layers to separate said conductor layers from each other, said windows being located to provide electric interconnections between the adjacent first and second conductor layers such that the single spirals of the first and second conductor layers are interconnected to form one multiple spiral having a uniform sense of rotation in which successive single spirals are situated alternately in the first and in the second conductor layer.
- 5. A miniaturized electric circuit comprising a planar substrate having a bottom conductor pattern provided on a planar surface of the substrate, a dielectric intermediate layer over the substrate and a top conductor pattern over the dielectric layer, an inductor comprising a helical continuous conductive path having individual spirals which, going from the outside to the inside, alternately lie in the bottom conductor pattern and in the top conductor pattern, and a capacitor element formed from a top and a bottom conductor pattern and an intermediate dielectric layer.
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6. A miniaturized electric circuit comprising a planar substrate having a bottom conductor pattern provided on a planar surface of the substrate, a dielectric intermediate layer over the substrate and a top conductor pattern over the dielectric layer, an inductor comprising a helical continuous conductive path having individual spirals which, going from the outside to the inside, alternately lie in the bottom conductor pattern and in the top conductor pattern, and at least one pair of crossing conductors formed from a top and a bottom conductor pattern and an intermediate dielectric layer.
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9. A miniature inductor comprising a substrate, a bottom conductor pattern provided on the substrate, an insulating intermediate layer over the bottom conductor pattern and provided with windows, a top conductor pattern over the insulating layer and electrically connected to the bottom conductor pattern via the windows in the intermediate layer, the bottom conductor pattern comprising a plurality n of single spiral-like paths each having an initial portion and an end portion, the nth spiral-like path being situated within the n-1st spiral-like path, the top conductor pattern also comprising a plurality n of single spiral-like paths each having an initial portion and an end portion, the nth spiral-like path being situated within the n-1st spiral-like path, and wherein the single spirals of the top and bottom conductor patterns are connected such that one continuous helical path is formed, successive single spirals of which are situated alternately in the bottom and in the top conductor patterns.
Specification