Offset From Track Centerline Patents (Class 360/125.18)
  • Patent number: 8514518
    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
  • Patent number: 7768744
    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