Integrated field generator for actuating magnetic heads
AssigneeInternational Business Machines Corporation
InventorsKenneth Donald Mackay, Antonio Perez, Jr.
Life of this patent
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Abstract
A structure is integrated into the design and manufacture of a magnetic head that allows self-generation of magnetic fields. The structure includes a conductor or conductors placed in close proximity to the read portion of a magnetic head and connected to an externally accessible connection. A high frequency signal is passed through the conductor to generate a magnetic field through the read device and simulate, for example, the head crossing magnetic domains on a magnetic memory disk.
Claims21
A magnetic head, comprising:
- a read portion;
- and
- a conductor embedded in the magnetic head and positioned towards the read portion, the conductor creating a magnetic field upon application of a current thereto;
- wherein a change in resistivity of the read portion in response to the magnetic field created by the conductor is measurable.
A method for testing a magnetic head, comprising:
- applying a sense current through a read portion of the magnetic head;
- applying a test current to a conductor embedded in the magnetic head, the conductor creating a magnetic field upon application of the test current thereto;
- pulsing the test current for varying the magnetic field created by the conductor;
- sensing a change in resistivity of the read portion in response to the magnetic field created by the conductor.
A magnetic storage system, comprising:
- magnetic media;
- at least one head for reading from and writing to the magnetic media, each head having:
- a read portion;
- a write element coupled to the read portion, the write element having an electrically conductive coil passing therethrough;
- and
- a conductor embedded in the magnetic head and positioned towards the read portion, the conductor creating a magnetic field upon application of a current thereto, wherein a change in resistivity of the read portion in response to the magnetic field created by the conductor is measurable;
- a slider for supporting the head;
- and
- a control unit coupled to the head for controlling operation of the head.
Dependencies are inferred from the claim text.