PERPENDICULAR MAGNETIC WRITE HEAD HAVING A WRAP AROUND SHIELD CONSTRUCTED OF A LOW PERMEABILITY MATERIAL FOR REDUCED ADJACENT TRACK ERASURE

摘要

A magnetic write head for perpendicular magnetic recording having a trailing, wrap around magnetic shield constructed of a low magnetic permeability. The lower permeability of the shield prevents magnetic saturation of the shield, which in turn prevents adjacent track interference such as adjacent track erasure. The shield can also be constructed as a pure trailing shield, or as first and second side shields without any trailing shield portion.