A magnetic write head having a vertically laminated back gap structure and method
of making the same are disclosed. The magnetic head is formed with lower and upper
pole pieces and a back gap structure which connects the lower and the upper pole
pieces in a back gap region. In one illustrative example, the back gap is a vertically
laminated structure having alternating layers of magnetic and non-magnetic materials.
Each alternating layer is perpendicular to both the lower and the upper pole pieces.
This vertically laminated structure significantly reduces the eddy currents in
the back gap region at high operating frequencies as the layers are oriented in
a direction parallel with the magnetic flux.
