Main pole layer with at least two sacrificial layers and a gap layer
AssigneeSeagate Technology LLC
InventorsWei Tian, Venkateswara Rao Inturi, Dong Lin, Huaqing Yin, Jiaoming Qiu
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Abstract
A write head having a main pole, a gap layer, and at least two sacrificial layers. In accordance with one embodiment, a method includes depositing a non-magnetic gap layer of material above a main pole layer of magnetic material; depositing a sacrificial layer of material above the non-magnetic gap layer of material; etching a portion of the sacrificial layer of material while not entirely removing the sacrificial layer of material; and depositing additional sacrificial material to the etched sacrificial layer.
Claims20
A method of forming a uniform gap between two magnetic materials, the method comprising:
- depositing a non-magnetic gap layer comprising a first material above a main pole layer of magnetic material;
- depositing a sacrificial layer of a second material above the non-magnetic gap layer;
- etching a portion of the sacrificial layer of the second material while not entirely removing the sacrificial layer of second material and not etching the non-magnetic gap layer;
- depositing additional second material to the etched sacrificial layer to form a restored sacrificial layer.
A method of forming a write head, the method comprising:
- providing a magnetic main pole having a bevel edge;
- depositing first non-magnetic gap layer on the main pole including on the bevel edge;
- depositing a second non-magnetic gap layer on the first non-magnetic gap layer;
- depositing a first sacrificial layer on the second non-magnetic gap layer;
- etching a portion of the first sacrificial layer;
- and
- depositing a second sacrificial layer on the etched sacrificial layer, the first sacrificial layer and the second sacrificial layer comprising the same material, to form a restored sacrificial layer.
Dependencies are inferred from the claim text.