High current handling capacity multilayer inductors for RF and microwave circuits
We present test data for several spiral inductors with improved quality factor fabricated on GaAs substrates using the ITT MSAG (multifunction self aligned gate) multilayer process. It is shown experimentally that the quality factor of spiral inductors can be enhanced by using thick metallization and placing inductors on a thick polyimide layer which is placed on top of the GaAs substrate. Using this technique we observed up to 68% improvement in the quality factor of spiral inductors as compared to standard spiral inductors. Inductors having thick metallization can also handle DC currents as large as 0.5 A. (C) 2000 John Wiley & Sons, Inc.
multilayer inductors spiral inductors high current inductors 3d inductors monolithic inductors improved q