Recording media with mechanically patterned landing zone
View Patent ↗A method of manufacturing a magnetic recording medium, comprises steps of providing a non-magnetic substrate for a magnetic medium, the substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone; and forming a pattern of recesses in the substrate surface in said CSS or landing zone by embossing utilizing a stamper having a surface including a negative image pattern of said pattern of recesses. Embodiments of the invention include magnetic media comprising a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses. In addition, the data zone of the substrate surface may include an embossed servo pattern formed simultaneously with the embossed pattern of recesses formed in the landing zone.
1. A magnetic recording medium, comprising:
a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses, wherein
said pattern of recesses comprises a plurality of rectangularly-shaped or sinusoidally-shaped recesses.
2. The magnetic recording medium as in claim 1 , wherein:
said substrate is annular disk-shaped, said CSS or landing zone comprises an annularly-shaped zone adjacent an inner or outer diameter of said disk, and said data zone comprises an annularly-shaped zone radially adjacent said CSS or landing zone.
3. The magnetic recording medium as in claim 1 , wherein:
said pattern of recesses comprises a plurality of rectangularly-shaped recesses, wherein each of the dimensions of the rectangles of said pattern is in the range of from about 0.1 to about 10 μm and the depth of each of the recesses is in the range of from about 10 to about 200 Å.
4. The magnetic recording medium as in claim 1 , wherein:
said pattern of recesses comprises a plurality of sinusoidally-shaped recesses, wherein the peak-to-peak spacings of adjacent recesses is in the range of from about 0.1 to about 10 μm and the depth of each of the recesses is in the range of from 10 to about 200 Å.
5. The magnetic recording medium as in claim 1 , wherein:
said substrate is comprised of a material selected from the group consisting of Al, Al/NiP, Al-based alloys, other metals, other metal alloys, polymers, and polymer-based materials, or a high modulus, hard-surfaced substrate selected from the group consisting of glass, ceramics, and glass ceramics ceramic, and glass-ceramic.
6. The magnetic recording medium as in claim 5 , wherein:
said substrate comprises glass, ceramic, and glass-ceramic and further includes a glass or glass-like layer on at least said substrate surface in said CSS or landing zone, said glass or glass-like layer being derived from a sol-gel layer and including a surface with said pattern of recesses formed therein.
7. The magnetic recording medium as in claim 1 , wherein:
said substrate surface in said data zone comprises an embossed servo pattern.
8. The magnetic recording medium as in claim 1 , comprising:
a stack of thin film layers formed over at least said substrate surface in said data zone, said stack of layers including at least one ferromagnetic recording layer.
9. A disk drive comprising a magnetic recording medium, wherein the magnetic recording medium comprises:
a non-magnetic substrate including at least one major surface having a contact start/stop (CSS) or landing zone and a data zone, said substrate surface in said CSS or landing zone comprising an embossed pattern of recesses, wherein
said pattern of recesses comprises a plurality of rectangularly-shaped or sinusoidally-shaped recesses.
10. The disk drive as in claim 9 , wherein:
said non-magnetic substrate is annular disk-shaped, said CSS or landing zone comprises an annularly-shaped zone adjacent an inner or outer diameter of said disk, and said data zone comprises an annularly-shaped zone radially adjacent said CSS or landing zone.
11. The disk drive as in claim 9 , wherein:
said pattern of recesses comprises a plurality of rectangularly-shaped recesses, wherein each of the dimensions of the rectangles of said pattern is in the range of from about 0.1 to about 10 μm and the depth of each of the recesses is in the range of from about 10 to about 200 Å.
12. The disk drive as in claim 9 , wherein:
said pattern of recesses comprises a plurality of sinusoidally-shaped recesses, wherein the peak-to-peak spacings of adjacent recesses is in the range of from about 0.1 to about 10 μm and the depth of each of the recesses is in the range of from 10 to about 200 Å.
13. The disk drive as in claim 9 , wherein:
said non-magnetic substrate is comprised of a material selected from the group consisting of Al, AL/NiP, Al-based alloys, other metals, other metal alloys, polymers, and polymer-based materials, or a high modulus, hard-surfaced substrate selected from the group consisting of glass, ceramic, and glass-ceramic.
14. The disk drive as in claim 13 , wherein:
said substrate comprises glass, ceramic, and glass-ceramic and further includes a glass or glass-like layer on at least said substrate surface in said CSS or landing zone, said glass or glass-like layer being derived from a sol-gel layer and including a surface with said pattern of recesses formed therein.
15. The disk drive as in claim 14 , wherein:
said substrate surface in said data zone comprises an embossed servo pattern.
16. The disk as in claim 9 , comprising:
a stack of thin film layers formed over at least said non-magnetic substrate surface in said data zone, said stack of layers including at least one ferromagnetic recording layer.