A microcoil is manufactured by rolling a trace unit in such a way as to form at least one winding. The trace unit is comprised of a conductive trace attached to a flexible insulating film. A preferred embodiment of the microcoil contains both a first winding and a second winding electrically connected...http://www.google.es/patents/US7210223?utm_source=gb-gplus-sharePatente US7210223 - Method of manufacturing a microcoil construction
