Write element with reduced yoke length for ultra-high density writing
AssigneeWestern Digital (Fremont), LLC
InventorsMohamad T. Krounbi, Li He, Ming Zhao, Yining Hu
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Abstract
A head including a write element for writing data to a magnetic media, and methods for its production are provided. A write element of the invention includes one or more of a recessed first pole, a heat sink layer, and a shortened yoke length. A method of the invention provides forming an anti-reflective layer before forming a mask layer. During photolithography the anti-reflective layer suppresses undesirable reflections off of features, such as vertical sidewalls, that otherwise limit how closely to such features portions of the mask layer can be formed.
Claims20
A write element with a reduced yoke length, the write element comprising:
- a bottom pole;
- a top pole;
- a P2 layer disposed between the bottom and top poles and including
- a P2 pole, and
- a P2 backgap providing magnetic communication between the bottom and top poles;
- a coil having turns disposed between the P2 pole and the P2 backgap, the turns including
- a first turn insulated from the P2 pole by a first inorganic layer, and
- a last turn insulated from the P2 backgap by a second inorganic layer;
- and
- a zero throat insulation layer disposed between the bottom pole and the first inorganic layer, the first turn at least partially over the zero throat insulation layer.
Dependencies are inferred from the claim text.