Perpendicular write head having a stepped flare structure and method of manufacture thereof

摘要

A magnetic write head for data recording having a magnetic write pole with a stepped magnetic shell structure that defines a secondary flare point. The secondary flare point defined by the magnetic shell portion can be more tightly controlled with respect to its distance from the air bearing surface (ABS) of the write head than can a traditional flare point that is photolithographically on the main pole structure. This allows the effective flare point of the write head to be moved much closer to the ABS than would otherwise be possible using currently available tooling and photolithography techniques. The write head also includes a non-magnetic spacer layer formed over the magnetic shell structure that is recessed from the ABS by a distance that is greater than that of the magnetic shell portion. A magnetic shield is formed over the magnetic shell and non-magnetic spacer.

主权项

1. A magnetic write head for magnetic data recording, comprising:
a magnetic write pole that includes: a magnetic write pole core portion having an end terminating at an air bearing surface (ABS) and having a trailing edge and first and second laterally opposed sides; and a magnetic shell portion formed over and contacting the trailing edge and first and second sides of the magnetic write pole core portion so as to cover a portion of said magnetic write pole core portion, the magnetic shell portion having an end surface that is recessed from the ABS by a first distance; a non-magnetic spacer layer formed over at least a portion of the magnetic shell portion, the non-magnetic spacer layer being recessed from the ABS by a second distance that is greater than the first distance; and a magnetic shield partially surrounding the magnetic write pole core portion, a portion of the magnetic shield being separated from the trailing edge of the magnetic write pole core portion by a non-magnetic gap and a portion of the magnetic shield being separated from the magnetic write pole core portion and magnetic shell portion by the non-magnetic spacer layer.