Magnetic storage writer with non-uniform coil thickness
AssigneeSeagate Technology LLC
InventorJames Wessel
Life of this patent
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Abstract
A magnetic recording head includes a write pole including an end proximal to a media-facing surface of the magnetic recording head, a return pole disposed a distance from the write pole in a down-track dimension of the magnetic recording head, and a writer coil configured to produce a magnetic flux in the write pole. The writer coil includes a first segment and a second segment. The first segment is disposed proximal to the end of the write pole and between the write pole and the return pole. The second segment is electrically coupled to the first segment. A thickness of the second segment in the down-track dimension is greater than a thickness of the first segment in the down-track dimension.
Claims20
A magnetic recording head comprising:
- a write pole comprising an end proximal to a media-facing surface of the magnetic recording head;
- a return pole disposed a distance from the write pole in a down-track dimension of the magnetic recording head;
- and
- a writer coil configured to produce a magnetic flux in the write pole, the writer coil comprising:
- a first segment disposed proximal to the end of the write pole and between the write pole and the return pole, the first segment comprising a first end and a second end;
- a second segment;
- and
- a third segment,
- wherein an end of the second segment is electrically coupled to the first end of the first segment,
- wherein an end of the third segment is electrically coupled to the second end of the first segment,
- wherein a thickness of the second segment in the down-track dimension is greater than a thickness of the first segment in the down-track dimension, and
- wherein a thickness of the third segment in the down-track dimension is greater than the thickness of the first segment in the down-track dimension.
A magnetic recording head comprising:
- a write pole comprising an end proximal to a media-facing surface of the magnetic recording head;
- a return pole disposed a distance from the write pole in a down-track dimension of the magnetic recording head;
- and
- a writer coil configured to produce a magnetic flux in the write pole, the writer coil comprising:
- a first segment disposed proximal to the end of the write pole and between the write pole and the return pole, the first segment comprising a first end and a second end;
- a second segment comprising a first end and a second end;
- a third segment;
- and
- a fourth segment comprising a first end and a second end;
- wherein the first end of the second segment is electrically coupled to the first end of the first segment,
- wherein an end of the third segment is electrically coupled to the second end of the first segment,
- wherein the second end of the second segment is electrically coupled to the second end of the fourth segment,
- wherein the fourth segment is disposed at a position that is substantially the same as a position of the first segment relative to a cross-track dimension and the down-track dimension,
- wherein the fourth segment is disposed behind the first segment relative to the media-facing surface in a media-facing dimension,
- wherein a thickness of the second segment in the down-track dimension is greater than a thickness of the first segment in the down-track dimension, and
- wherein a thickness of the third segment in the down-track dimension is greater than the thickness of the first segment in the down-track dimension, and
- wherein the fourth segment has a thickness in the down-track dimension, a length in the cross-track dimension of the magnetic recording head, and the width in the media-facing dimension of the magnetic recording head that are approximately equal to the thickness, a respective length, and a respective width of the first segment.
Dependencies are inferred from the claim text.