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US 2008/0165452 A1Published application
Virtual front shield writer
AssigneeSeagate Technology LLC
InventorsSteven Paul Bozeman, Olle Gunnar Heinonen, Sining Mao
Life of this patent
Estimating the term…
Abstract
A magnetic writer includes a first write element and a second write element. The first write element produces a first field when a first current is passed through a first coil. The second write element, which is disposed relative to the first write element, produces a second field when a second current is passed through a second coil such that the second field at least partially opposes the first field.
Claims20
A magnetic writer comprising:
- a first write element that produces a first field when a first current is passed through a first coil;
- and
- a second write element disposed relative to the first write element that produces a second field when a second current is passed through a second coil, wherein the second field at least partially opposes the first field.
A magnetic writer comprising:
- a first write pole that generates a write field when a first current is passed through a first coil;
- a first return pole magnetically coupled to the first write pole on a trailing side of the first write pole;
- and
- a second write pole disposed between the first write pole and the first return pole that produces an auxiliary field when a second current is passed through a second coil that at least partially opposes the write field at the trailing edge of the first write pole.
1 more element
A magnetic writer comprising:
- a first write element;
- a first return element coupled to the first write element by a first magnetic stud;
- a second write element magnetically coupled to the first magnetic stud;
- and
- a first conductor disposed around the first magnetic stud, wherein the first write element generates a write field when a first current is passed through the first conductor;
- a second conductor disposed around the first magnetic stud, wherein the second write element generates an auxiliary field that at least partially opposes the write field when a second current having a direction opposite the first current is passed through the second conductor.
3 more elements
Dependencies are inferred from the claim text.