A magnetic data track used in a magnetic shift register memory system may
be fabricated by forming a multilayered stack of alternating dielectric
and/or silicon layers. A trench is etched in the multi-layer stack
structure. A selective etching process is used to corrugate the walls of
trench. A seed layer is applied to the walls and bottom of the trench;
the seed layer is covered with a magnetic layer. The trench is filled
with an insulating material. A patterned layer is applied and portions of
insulating material exposed by the pattern are removed, forming holes.
Magnetic material and seed layer exposed in holes is selectively removed.
The holes are filled with insulating material and connecting leads are
attached to data tracks.