Patent ID: 9735753
Date: 2017-08-15
CPC Classifications: H01F,H01L,H03H

Claim:
1. A method of manufacturing a magnetically coupled structure incorporated on a chip with an integrated circuit, integrated within a process for fabrication of the integrated circuit, comprising: forming a first coil comprising a first generally planar multi-turn metal winding by patterning a copper metal layer formed for the manufacture of the integrated circuit; forming a second coil in a stacked configuration with the first coil, the second coil comprising a second generally planar multi-turn metal winding, by patterning a top metal bonding layer formed for the manufacture of the integrated circuit; and forming crossings between turns of the respective coils by patterning one or more other metal layers formed for the manufacture of the integrated circuit, the one or more other metal layers being thinner than the copper metal layer and top metal bonding layer, wherein said crossings include first crossings for the first coil and a second crossing for the second coil.