Laser textured magnetic disk comprising NiNb
AssigneeKomag, Inc.
InventorsCaroline A. Ross, Martin P. Rosenblum, David Treves
Life of this patent
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Abstract
A method for manufacturing a magnetic disk comprises the steps of depositing NiP (20) on a substrate (22); depositing NiNb (24) on the NiP; and laser texturing the NiNb. "Sombrero" shaped texture features are more easily formed on the substrate/NiP/NiNb structure than a substrate/NiP structure. The disk is completed by depositing an underlayer (e.g. sputtered Cr or NiP), a magnetic layer (e.g. a Co alloy) and a protective overcoat (e.g. by hydrogenated carbon).
Claims19
A method for manufacturing a magnetic disk comprising the steps of:
- forming a layer of NiNb on a substrate, said substrate having a metallic surface;
- laser texturing the layer of NiNb to form sombrero texture features;
- and
- forming a magnetic layer over the NiNb after said step of laser texturing said layer of NiNb.
A magnetic disk comprising:
- a substrate having a metallic surface;
- a NiNb layer formed on said metallic surface, said NiNb layer having laser-induced sombrero texture features formed thereon;
- and
- a magnetic layer on the NiNb layer.
A magnetic disk drive comprising:
- a magnetic disk including a substrate having a metallic surface, an NiNb layer formed on said metallic surface, and a magnetic layer formed on the NiNb layer, said NiNb layer having laser-induced sombrero texture features formed thereon;
- a motor coupled to said magnetic disk for rotating said magnetic disk;
- a read-write head for flying above said magnetic disk, and for reading data from and writing data to said magnetic disk;
- and
- an arm for holding said read-write head in proximity to said disk;
- and
- an actuator for moving said arm so that said read-write head may be placed over desired data tracks on said magnetic disk.
A magnetic disk comprising:
- a substrate having a metallic surface;
- a NiNb layer formed on said metallic surface, said NiNb layer having laser-induced texture features, at least a portion of said features protruding from the surface of said NiNb layer;
- and
- a magnetic layer on the NiNb layer,
- said texture features reducing the stiction exhibited by said disk.
A method for manufacturing a magnetic disk comprising the steps of:
- forming a layer of NiNb on a substrate, said substrate having a metallic surface;
- laser texturing the layer of NiNb;
- and
- depositing a magnetic layer over said layer of NiNb.
Dependencies are inferred from the claim text.