The present invention is a magnetic head having a helical induction coil
and includes hard disk drive devices that utilize the magnetic head. The
helical coil is fabricated around a magnetic pole yoke in a series of
process steps that include a reactive ion etch (RIE) process step which
is utilized to simultaneously form vertical interconnect vias and upper
helical coil member trenches. Thereafter, in a single fabrication step,
such as by electroplating, the vertical interconnect lines and the upper
helical coil traces are created in a single fabrication step, such that
they are integrally formed. The vertical interconnect lines provide an
electrical connection between outer ends of previously formed lower
helical coil traces and outer ends of the integrally formed upper helical
coil traces, such that a helical coil is fabricated. In the preferred
embodiment, the helical coil is composed of copper.