Oriented magnetic medium on a nonmetallic substrate
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsDavid Thomas Margulies, Timothy Martin Reith, Hoa Do, Tim Minvielle, James A. Hagan
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Abstract
This invention provides a disk which has an in-plane oriented magnetic recording layer on a glass, ceramic, or other nonmetallic substrate and a method for making the disk. A thin layer of material is deposited on the substrate to form a texture stop layer. A texturable layer is then deposited on the texture stop layer. This texturable layer is textured before the magnetic layer is deposited. The disk combines all the advantages of a glass or ceramic substrate along with the advantages of an oriented magnetic medium.
Claims9
A magnetic recording disk for use in a disk drive, comprising:
- a glass substrate;
- a texture stop layer formed over said substrate, said texture stop layer having a thickness of less than 500 nm;
- a textured layer formed over said texture stop layer, said textured layer being textured in a substantially circumferential direction and having a thickness less than 200 nm;
- a magnetic layer formed over said textured layer;
- and,
- an overcoat layer formed over said magnetic layer,
- wherein the hardness of said texture stop layer is greater than the hardness of said textured layer.
A disk drive, comprising:
- a motor;
- a disk connected with said motor, said disk having a glass substrate, a texture stop layer formed over said substrate, said texture stop layer having a thickness of less than 500 nm, a textured layer formed over said texture stop layer, said texture layer being textured in a substantially circumferential direction and having a thickness of less than 200 nm, and a magnetic recording layer formed over said textured layer, wherein the hardness of said texture stop layer is greater than the hardness of said textured layer;
- an actuator;
- and,
- a head gimbal assembly attached to said actuator, wherein said head gimbal assembly has a recording head for magnetic recording on said disk.
Dependencies are inferred from the claim text.