To enhance the write performance of a CF-SPT head, a smaller main pole of Co-Ni-Fe and a finer coil were fabricated by using the electrodeposition method. Fine coils with 2.5 μm pitch were obtained by the damascene process. The magnetic domain structure of the 15-μm-high and 20-μm-wide main poles could be controlled by changing their taper angles. A head with a favorable domain except at its tip exhibited stable write performance and no pole erasure. Thus, it was concluded that a control of the magnetic domain was necessary for write heads.
