For Longitudinal Recording Head Patents (Class 360/123.13)
  • Patent number: 10136508
    Abstract: What is shown is a cyclic accelerator for accelerating charge carriers. The cyclic accelerator includes a charge carrier source configured to generate free charge carriers, a vacuum chamber configured to receive the free charge carriers, wherein the vacuum chamber is produced by means of MEMS technology, and wherein at least a main surface region of the vacuum chamber has a semiconductor material. In addition, the cyclic accelerator has electrodes configured to accelerate the free charge carriers in the vacuum chamber by means of an alternating current field, and a magnetic field generator configured to generate a magnetic field perpendicularly to the direction of movement of the charge carriers.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: November 20, 2018
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventor: Karl Haberger
  • Publication number: 20150092302
    Abstract: A method according to one embodiment includes biasing, by a biasing circuit, an electrically conductive structure to a predefined and/or selected voltage. A resistive link is coupled to both the biasing circuit and the electrically conductive structure, the electrically conductive structure being positioned proximate to a media hearing surface. A method according to another embodiment includes biasing, by a biasing circuit, a conductive bus to a predefined and/or selected voltage, the conductive bus being coupled to at least one of a plurality of transducers and a plurality of electrically conductive structures. Resistive links are electrically coupled between the conductive bus and the electrically conductive structures and/or the transducers.
    Type: Application
    Filed: December 4, 2014
    Publication date: April 2, 2015
    Inventor: Robert G. Biskeborn
  • Patent number: 8064160
    Abstract: A magnetic head includes a medium facing surface, a coil, and a pole layer that generates a write magnetic field. The pole layer includes: a track width defining portion having a first end located in the medium facing surface and a second end opposite to the first end; and a wide portion connected to the second end. The first end defines the track width. The track width defining portion has a width taken in the track width direction, and the wide portion has a width taken in the track width direction that is greater than the width of the track width defining portion taken in the track width direction. The coil is helically wound only around the track width defining portion of the pole layer, and has a portion located between the medium facing surface and the wide portion.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: November 22, 2011
    Assignee: TDK Corporation
    Inventors: Naoki Ohta, Kenkichi Anagawa