EP0013460A2
Expired / Lapsed
EP
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Miniaturized multi-layer flat electrical coil
Assignee: Koninklijke Philips NV
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Filing: 1979-12-28
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Granted: —
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Expires: 1999-12-28
Abstract
Abstract A miniaturized electric coil having a low self-capacitance which is constructed from 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 conductor layer comprises n single spiral-like paths, as also the top conductor layer. 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 tum contacts the outer end of the second spiral of the bottom conductor layer, and so on.
Inventors
- 👤 Roger Alfons Vranken
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 02:02
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/2804; H01F17/00; H01F17/0006; H01F5/00; H01F5/003
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
A miniaturized multi-layer flat electric coil comprising a stack of a number of conductor layers each having a system of spiral-like electrically conductive tracks, in which adjacent conductor layers are separated from each other by an electrically insulating layer and in which adjacent. conductor Jayers are interconnected electrically via windows in the electrically insulating layer, characterized in that the coil comprises a substrate which carries a stack of conductor layers, the first conductor layer having a number of conductor tracks each forming a single spiral having an inner end and an outer end, the n th spiraJ being situated within the n-1 st spiral, that the second conductor layer also has a number of conductor tracks each forming a single spiral havig an inner end and an outer end, the n th spiral being also situated within the n- I -1 spiral, and that the single spirals of the first and second conductor layers are interconnected in a manner to form one multiple spiral having a uniform sense of rotation of which successive single spirals are situated alternately in the first and in the second conductor layer.
Claim 2
Dependent Claim
187 words
A miniaturized multi-layer flat electric coil comprising a stack of a number of conductor layers each having a system of spiral-like electrically conductive tracks, in which adjacent conductor layers are separated from each other by an electrically insulating layer and in which adjacent. conductor Jayers are interconnected electrically via windows in the electrically insulating layer, characterized in that the coil comprises a substrate which carries a stack of conductor layers, the first conductor layer having a number of conductor tracks each forming a single spiral having an inner end and an outer end, the n th spiraJ being situated within the n-1 st spiral, that the second conductor layer also has a number of conductor tracks each forming a single spiral havig an inner end and an outer end, the n th spiral being also situated within the n- I -1 spiral, and that the single spirals of the first and second conductor layers are interconnected in a manner to form one multiple spiral having a uniform sense of rotation of which successive single spirals are situated alternately in the first and in the second conductor layer.
Claim 3
Dependent Claim
53 words
An electric coil as claimed in Claim 1, characterized in that the coil has two electric connections of which one is connected to the outer end of the outer spiral of the first conductor layer and the other is connected to the inner end of the inner spiral of the second conductor layer.
Claim 4
Dependent Claim
33 words
An electric coil as claimed in Claim 2, characterized in that the connection with the inner end of the inner coil is formed by an electrically conductive track in the second conductor layer.
Claim 5
Dependent Claim
33 words
An electric coil as claimed in Claim 3, characterized in that the electrically conductive track extends between the inner end and the outer end of the single spirals of the second conductor layer.
Claim 6
Dependent Claim
54 words
A miniaturized electric circuit having a planer substrate which carries at lest a coil having spirals spiralizing once from the outside Lo the inside, a capacitor and/or a set of crossing conductor paths, the elements of the circuit being formed from a bottom soducter layer; a dielectric intermediate layer and a top conductor layer.
Claim 7
Dependent Claim
54 words
A miniaturized electric circuit having a planer substrate which carries at lest a coil having spirals spiralizing once from the outside Lo the inside, a capacitor and/or a set of crossing conductor paths, the elements of the circuit being formed from a bottom soducter layer; a dielectric intermediate layer and a top conductor layer.
Claim 8
Dependent Claim
23 words
An electric circuit as claimed in Claim 5, characterized in that the conductor layer and the dielectric layer are provided in thick-film technique.
Claim 9
Dependent Claim
164 words
An electric circuit as claimed in Claim or 6, characterized in that a pattern for the coil having a number of single spiral-like paths each having an inner end and an outer end is formed from the bottom conductor layer, in which the n th path is situated within the n-1 st path, that a pattern for the coil likewise comprising a number of spiral-like paths each having an inner end and an outer end is formed from the top conductor layer, in which the n th path is sitituted within the n-1 st path, while via windows in the drefectric intermediate layer the inner end of the first path of the bottom conductor layer is connected to the onter end of the first path of the top conductor layer, while the inner end of the first path of the top conductor layer in its turn is connected to the outer end of the second path of the bottom conductor layer, and so on.
References Cited (Backward Citations)
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