Bilayer carbon overcoating for magnetic data storage disks and m

Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering

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20419215, 2041922, 427122, 427128, 427131, 427599, 427577, C23C 1434

Patent

active

058581820

ABSTRACT:
A magnetic head/slider construction and a magnetic data recording disk, as well as a method for fabricating the magnetic head/slider construction and the magnetic data storage disk. To practice the method, there is formed over the air bearing surface of each of a magnetic head/slider construction and a magnetic data storage disk a wear resistant carbon layer. Over each of the wear resistant carbon layers is then formed a lubricating carbon layer. The lubricating carbon layers may be formed in-situ upon the wear resistant carbon layers. The wear resistant carbon layers may be formed from nitrogenated wear resistant carbon materials having a nitrogen content of from about 15 to about 30 atomic percent and hydrogenated wear resistant carbon materials having a hydrogen content of from about 15 to about 25 atomic percent. The lubricating carbon layer is preferably formed from a hydrogenated lubricating carbon material having a hydrogen content of from about 30 to about 40 atomic percent. Through the method, there is formed magnetic head/slider constructions and magnetic data recording disks simultaneously possessing improved wear resistance characteristics and improved lubricating properties.

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Lee et al, "The Effect of Chemical and Surface Properties of Hydrogenated Performance of Rigid Magnetic Disks" Carbonovercoats on the Tribological IEEE Trans on Magnitics, vol. 29(1), Jan. 1993 pp. 276-281.
Bagg et al "Enhancement of Head-Disk Interface Durability by use of Diamond Digest of the Magnetic Recording Like Carbon on Overcoats on the Sliders Rails" Digest of the Magnetic Recording Conf. Sep. 1993, DS.
Wong et al, "Tribological & Recording Performance of Carbon Coated thin film Head Unlubricated and Lubricated Thin Film Media," IEEE Trans Sliderson on Magnetics, vol. 30(6), Nov. 1994, pp. 4125-4127.
Wong et al. "the Effect of Hydrogen in Carbon Overcoats on the Tribology of the Head-DiskInterface" IEEE Trans on Magnetics, vol. 31(6), Nov. 1995, pp. 2919-2921.
"The Interaction of Lubricant with Hydrogenated Carbon"Digest of Intermag '96 Conference, Jul. 1996. HA-07.

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