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US 2009/0154011 A1Published application
Magnetic write head having helical coil with a fin structure for reduced heat induced protrusion
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsWen-Chien David Hsiao, Edward Hin Lee, Jennifer Ai-Ming Leung
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Abstract
A magnetic write head having a write coil configured to dissipate heat away from the write head to minimize thermal protrusion. The write coil is formed as a helical coil having upper and lower leads that are connected by electrically conductive studs formed therebetween. The first and leads extend beyond the studs to form heat conducting fins that conduct heat away from the write head where it can be dissipated into surrounding structure.
Claims20
A magnetic write head, comprising:
- a magnetic write pole extending to an air bearing surface;
- a magnetic return pole, magnetically connected with the write pole in a region removed from the air bearing surface;
- a helical coil arranged around the write pole so as to induce a magnetic flux in the write pole when electrical current flows through the write coil, the write coil further comprising at least one heat conducting fin extending laterally outward.
A write head for perpendicular magnetic data recording, comprising:
- a magnetic write pole having a pole tip extending to an air bearing surface;
- a magnetic return pole that is magnetically connected with the write pole in a region removed from the air bearing surface;
- a plurality of electrically conductive lower coil leads formed beneath the write pole;
- a plurality of electrically conductive upper coil leads formed above the write pole;
- a first set of electrically conductive studs, formed on a first side of the write pole each of the first set of electrically conductive studs connecting one of the electrically conductive upper leads with a one of the electrically conductive lower leads;
- and
- a second set of electrically conductive studs, formed on a second side of the write pole each of the second set of electrically conductive studs connecting one of the electrically conductive upper leads with a one of the electrically conductive lower leads;
- wherein
- at least one of the upper or lower electrically conductive leads extends beyond an electrically conductive stud connected therewith to form a heat conducting fin laterally outward.
6 more elements
Dependencies are inferred from the claim text.