Magnetic devices with variable overcoats
AssigneeSeagate Technology LLC
InventorsEdwin Frank Rejda, Joseph Michael Stephan, The Ngoc Nguyen, Neil Zuckerman, Gary J. Kunkel, Douglas H. Cole, Michael A. Seigler, Chris Rea
Life of this patent
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Abstract
A magnetic device including: a magnetic reader; a magnetic writer; and a variable overcoat, the variable overcoat positioned over at least the magnetic reader and writer, the variable overcoat having an overcoat layer, the overcoat layer having a substantially constant thickness and material; and at least one disparate overcoat portion, the disparate overcoat portion having a different thickness, a different material, or both, than the overcoat layer.
Claims13
A magnetic device having an air bearing surface, the magnetic device comprising:
- a magnetic reader;
- a magnetic writer;
- and
- a variable overcoat, the variable overcoat positioned over at least the magnetic reader and writer at the air bearing surface of the device, the variable overcoat comprising:
- an overcoat layer, the overcoat layer having a substantially constant thickness and material;
- and
- at least one disparate overcoat portion, the disparate overcoat portion positioned over the magnetic writer but not the magnetic reader, wherein the disparate overcoat portion has a greater thickness and a different material than the overcoat layer.
A method comprising:
- depositing a first layer over the entire air bearing surface of a structure, the structure comprising a magnetic reader and a magnetic writer, wherein the magnetic reader and the magnetic writer are positioned adjacent to each other on a substrate;
- removing a portion of the first layer over at least the magnetic reader;
- and
- depositing a second layer over the entire surface of the first layer,
- wherein the first layer and the second layer comprise a variable overcoat, the variable overcoat having a overcoat layer and a disparate overcoat region over the magnetic writer, wherein the disparate overcoat region has a greater thickness than the overcoat layer, and wherein the first layer and the second layer comprise different materials.
A method comprising:
- depositing a first layer on the entire air bearing surface of a structure, the structure comprising a magnetic reader and a magnetic writer, wherein the magnetic reader and the magnetic writer are positioned adjacent to each other on a substrate;
- masking regions of the surface to form exposed and unexposed regions;
- depositing a second layer on the surface of the exposed and unexposed regions;
- and
- removing the unexposed regions and the second layer on the unexposed regions,
- wherein a disparate overcoat region comprises a portion of the first layer and the second layer and the disparate overcoat region is positioned over the magnetic writer, and wherein the first layer and the second layer comprise different materials.
Dependencies are inferred from the claim text.