Hybrid read-write head for perpendicular recording media
AssigneeVertimag Systems Corporation
InventorsWayne A. Bonin, Matthew P. Dugas
Life of this patent
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Abstract
A hybrid read/write head for use with a perpendicular recording medium is a laminate of prefabricated members having thin film magnetic layers as the read/write and tunnel erase pole tips.
Claims16
A read-write head for use with a perpendicular recording medium, comprising prefabricated elongated members secured together in face-to-face relationship to form a unitary structure having an end adapted to be proximate to said recording medium during use, a first said member having a non-magnetic end portion adjacent said proximate end of said head and a magnetic portion extending away from said non-magnetic end portion, said head further comprising:
- (a) read-write means for selectively reproducing and recording information on said recording medium, comprising pole-piece means between said first member and a said member secured thereto and first electrical coil means in operative association with said pole-piece means, said pole-piece means comprising a first elongated thin film layer of a magnetic material carried by and extending longitudinally along a face of said first member, said first thin film layer overlying said non-magnetic end portion of said first member and extending onto said magnetic portion and having a pole-tip end immediately adjacent the non-magnetic end portion of said first member at said proximate end, the thickness of said pole-tip end being operable to establish the resolution of said head when said head is used for reproducing said information.
A read-write head for use with a perpendicular recording medium, comprising first and second elongated prefabricated magnetic members secured together in face-to-face relationship to form a unitary structure having an end adapted to be proximate to said recording medium during use;
- pole-piece means between said first and second magnetic members;
- and first electrical coil means in operative association with said pole-piece means;
- said pole-piece means comprising an elongated thin film layer of magnetic material between and extending longitudinally along opposed faces of said first and second magnetic members and having a pole-tip end immediately adjacent the end of said magnetic members at said proximate end of said head, said first and second magnetic members having a non-magnetic portion at the end thereof adjacent said pole tip end;
- the thickness of said pole-tip end being operable to establish the resolution of said head when said head is used for reading;
- said first and second magnetic members being operable to provide flux return paths on both sides of said pole-piece means for flux generated by read-write magnetic fields.
Dependencies are inferred from the claim text.