Patent ID: 6480086
Filing Date: 2002-11-12
Classification: H01F,H01L

Abstract:
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.