Inductive writer with flat top pole and pedestal defined zero throat
AssigneeWestern Digital (Fremont), LLC
InventorsYingjian Chen, James Wang, Qing He, Zi-Wen Dong, David J. Seagle
Life of this patent
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Abstract
A disk drive write head (10) having a bottom pole (60), a first insulation layer (64) formed on the bottom pole (60), a coil (38) formed on the first insulation layer (64), a second insulation layer (66) formed on the coil (38), a write gap layer (76) formed on the second insulation layer (66), and a top pole (12) formed on the write gap layer (76), where the top pole (12) is substantially flat. A second embodiment (100) is described which is produced by a damascene process.
Claims6
A disk drive write head comprising:
- a bottom pole, said bottom pole including a pedestal portion;
- a first insulation layer formed on said bottom pole;
- a coil formed on said first insulation layer;
- a second insulation layer formed on said coil, the second insulation layer being substantially aligned with said pedestal portion;
- a write gap layer formed on said second insulation layer and said pedestal portion;
- a flux enhancement layer of high magnetic moment material formed on said write gap layer and covering the coil and the pedestal portion, the flux enhancement layer being substantially flat;
- and
- a top pole formed on the flux enhancement layer adjacent the coil and the pedestal portion, said top pole being substantially flat.
A slider for reading data from a disk surface, said slider including a disk drive write head, said head comprising:
- a bottom pole, said bottom pole including a pedestal portion;
- a first insulation layer formed on said bottom pole;
- a coil formed on said first insulation layer;
- a second insulation layer formed on said coil, the second insulation layer being substantially aligned with said pedestal portion;
- a write gap layer formed on said second insulation layer and said pedestal portion;
- a flux enhancement layer of high magnetic moment material formed on said write gap layer and covering the coil and the pedestal portion, the flux enhancement layer being substantially flat;
- and
- a top pole formed on the flux enhancement layer adjacent the coil and the pedestal portion, said top pole being substantially flat.
A computer disk drive having a slider for reading data from a disk surface, said slider including a disk drive write head, said head comprising:
- a bottom pole, said bottom pole including a pedestal portion;
- a first insulation layer formed on said bottom pole;
- a coil formed on said first insulation layer;
- a second insulation layer formed on said coil, the second insulation layer being substantially aligned with said pedestal portion;
- a write gap layer formed on said second insulation layer and said pedestal portion;
- a flux enhancement layer of high magnetic moment material formed on said write gap layer and covering the coil and the pedestal portion, the flux enhancement layer being substantially flat;
- and
- a top pole formed on the flux enhancement layer adjacent the coil and the pedestal portion, said top pole being substantially flat.
Dependencies are inferred from the claim text.