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US 5,075,280 AGranted
Thin film magnetic head with improved flux concentration for high density recording/playback utilizing superconductors
AssigneeAmpex Corporation
InventorsRaghavan K. Pisharody, Sidney D. Miller, Beverley R. Gooch, David A. Petersen
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Abstract
Structures of magnetic heads having superconducting shields are disclosed for spatially directing magnetic recording/playback fields. One embodiment is a thin film magnetic head with a layer of superconductor material associated with its throat. Further embodiments provide intertrack shielding and concentration of recording/playback fields into relatively small pole tip regions.
Claims6
A thin film magnetic head for use with a magnetic medium, comprising:
- a core including a first and a second deposited layer of ferromagnetic material, each layer having a pole portion, each pole portion lying in a plane generally parallel to the other and generally perpendicular to a direction of motion of the recording medium, said pole portions being separated by a gap;
- a conductor, electromagnetically coupled to said core;
- a layer of superconductor material located between the pole portions in the gap for excluding magnetic flux from the gap;
- a first layer of superconductor shield material provided on a face of the pole portion of said first layer of ferromagnetic material opposite said gap;
- and
- a second layer of superconductor shield material provided on a face of the pole portion of said second layer of ferromagnetic material opposite the gap.
3 more elements
Dependencies are inferred from the claim text.