Embedded dual coil planar structure

A disk drive system, comprising:

• one or more magnetic storage disks mounted on a spindle, each disk having at least one storage surface;
• a motor coupled to the spindle to rotate the disks about the spindle;
• and
• a suspension assembly, comprising, for each storage surface:
• an adjustable actuator assembly having a distal end;
• a write head affixed to the distal end, the head being maintained in a substantially fixed position relative to the disks media during relative motion between the head and the media, the head comprising:
• a shield layer;
• a pole layer substantially parallel to the shield layer,
• an intermediate layer interposed between and substantially parallel to the shield and pole layers, the intermediate layer including a magnetic shield/pole material and having a first surface facing the pole layer, the surface having defined therein a circuitous recess surrounding a hub of unrecessed intermediate layer material;
• and
• a write structure including first and second substantially co-planar multi-turn flat write coils, where turns of the first write coil are interspersed with turns of the second write coil, and all portions of both first and second write coils reside in the circuitous recess and wind around the hub.