Abstract: A magnetic write pole structure that is configured to greatly simplify the manufacture of a perpendicular magnetic write head. The write head has a magnetic yoke that is oriented along a plane that is perpendicular to the direction of the data track. This allows the entire yoke to be formed in a single electroplating step, rather than being built up in several plated layers. The yoke can also be formed with magnetic side shields, or with a trailing or wrap around shield, which can be integral with the rest of the yoke and can be advantageously formed in the same, single electroplating step.
Type:
Grant
Filed:
May 2, 2008
Date of Patent:
August 20, 2013
Assignee:
HGST Netherlands B.V.
Inventors:
Ian Robson McFadyen, Petrus Antonius Van Der Heijden
Abstract: A perpendicular magnetic recording write head has a main pole and return poles that are substantially coplanar. The write head includes a main pole, two return poles and a connecting stud that are all formed as a single layer in a single deposition and patterning step. The coplanar main and return poles lie in a plane parallel to the cross-track direction. The two return poles are thus spaced from the main pole in the cross-track direction. The main pole includes a write pole connected to it but lying in a plane spaced in the along-the-track direction from the plane of the main pole. The write head includes a helical coil wrapped around the main pole. The magnetic flux path is from the write pole to the disk recording layer in a data track aligned with the write pole, to the disk underlayer beneath the recording layer, through the underlayer to data tracks spaced cross-track from the data track aligned with the write pole, and back through the return poles.
Type:
Grant
Filed:
May 2, 2007
Date of Patent:
August 3, 2010
Assignee:
Hitachi Global Storage Technologies Netherlands B.V.
Inventors:
Wen-Chien David Hsiao, Yimin Hsu, Edward Hin Pong Lee, Vladimir Nikitin