Inductor and transformer formed with multi-layer coil turns fabricated on an integrated circuit substrate
First Claim
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1. An integrated circuit apparatus having a transformer thereon, said apparatus comprising:
- an integrated circuit substrate;
a first insulation layer over a face of said integrated circuit substrate;
a plurality conductive layers, each of said plurality of conductive layers shaped in the form of a first coil turn and a second coil turn wherein the first coil turn is concentrically located within the second coil turn, the first and second coil turns each having first and second ends;
a plurality of insulation layers interleaved between said plurality of conductive layers;
a one of said plurality of conductive layers proximate to said first insulation layer and the other ones of said plurality of conductive layers stacked over the one with said plurality of insulation layers interleaved therebetween; and
a plurality of conductive vias connecting adjacent ones of the first and second coil turns of said plurality of conductive layers, thereby forming a transformer comprising a first coil and a second coil.
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Abstract
An inductor and transformer comprise a plurality of interleaved conductive layers and insulation layers fabricated on a monolithic semiconductor integrated circuit die. The conductive layers are shaped into coil turns of the inductor and the transformer, and are stacked vertically (perpendicular to the horizontal plane of the coil layers) and proximate to one another so as to achieve close magnetic coupling therebetween, thereby achieving a larger inductance value for a given sized coil structure. The conductive layer coil turns are connected together with conductive vias through the interposing insulation layers.
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12 Claims
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1. An integrated circuit apparatus having a transformer thereon, said apparatus comprising:
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an integrated circuit substrate;
a first insulation layer over a face of said integrated circuit substrate;
a plurality conductive layers, each of said plurality of conductive layers shaped in the form of a first coil turn and a second coil turn wherein the first coil turn is concentrically located within the second coil turn, the first and second coil turns each having first and second ends;
a plurality of insulation layers interleaved between said plurality of conductive layers;
a one of said plurality of conductive layers proximate to said first insulation layer and the other ones of said plurality of conductive layers stacked over the one with said plurality of insulation layers interleaved therebetween; and
a plurality of conductive vias connecting adjacent ones of the first and second coil turns of said plurality of conductive layers, thereby forming a transformer comprising a first coil and a second coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification