Study on the write-field profile and intensity of narrow-track-width SPT head

The effects of the structure of a single-pole-type (SPT) head and the underlayer thickness on the write-field profile and intensity were examined by computer calculation. The results demonstrated the possibility of achieving a strong write field even with a thin underlayer in the case of narrow-track-width SPT. The shorter throat height enhanced the maximum write-field intensity without a great change of the write-field profile. We also proposed a new, tapered SPT head suitable to address the sidewriting issue for drive integration.