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US 7,256,955 B2Granted
High frequency assisted writing
AssigneeSeagate Technology LLC
InventorsTaras G. Pokhil, Victor B. Sapozhnikov, Andrzej A. Stankiewicz, Janusz J. Nowak
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Abstract
Data is written to a magnetic media, by applying a magnetic write field to the magnetic media with a write pole, in conjunction with a high frequency magnetic field, to the magnetic media to assist writing to the magnetic media. The high frequency magnetic field is generated by applying a specific write current waveform to the magnetic writer, resulting in the generation of a high frequency magnetic write field.
Claims19
A method of writing to a magnetic media, the method comprising:
- producing a current in a coil by configuring a current generation circuit to produce a high frequency oscillation in the current following a transition of the current from one direction to the opposite direction, wherein the current generates a magnetic write field and a high frequency magnetic field;
- and
- wherein the magnetic write field and the high frequency magnetic field create an area of magnetic resonance within the magnetic media.
A magnetic writer comprising:
- a write pole;
- and
- a coil adjacent the write pole having a current that includes a write current component and a high frequency component, wherein the write current component of the current generates a magnetic write field and the high frequency component of the current creates magnetic precession within the write pole that results in the generation of a high frequency magnetic field;
- wherein the magnetic write field and the high frequency magnetic field are controlled to create an area of magnetic resonance within a magnetic media.
1 more element
A magnetic head comprising:
- a magnetic pole;
- a coil adjacent the magnetic pole, the coil having a write current;
- a magnetic media adjacent the magnetic pole;
- and
- writing means for creating an area of magnetic resonance on a portion of the magnetic media, wherein the writing means introduces a high frequency signal to the write current by producing a high frequency oscillation in the write current following a transition in the write current component from one direction to an opposite direction.
2 more elements
A magnetic writer comprising:
- a write pole;
- and
- a coil adjacent the write pole having a current that includes a write current component and a high frequency component, wherein the write current component generates a magnetic write field and the high frequency component generates a high frequency magnetic field;
- wherein the write current component and the high frequency component are controlled such that the magnetic write field and the high frequency magnetic field interact to create an area of magnetic resonance within a magnetic media.
1 more element
Dependencies are inferred from the claim text.