Magnetic recording medium having a prelayer
AssigneeHMT Technology Corporation
InventorsBrij Bihari Lal, Sudhir S. Malhotra, Michael A. Russak
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Abstract
An improvement in a magnetic recording medium having an underlayer and a magnetic recording layer is described. The improvement, effective to reduce media anisotropy, includes deposition of a prelayer on the substrate, prior to deposition of the underlayer. The prelayer is deposited to a thickness of between 10-60 .ANG. and is composed of an CoCr-based alloy having a defined saturation magnetization.
Claims20
An improvement in a magnetic recording medium formed on a rigid substrate and having an underlayer and a magnetic recording layer, said improvement comprising
- a prelayer deposited on the substrate prior to deposition of said underlayer, said prelayer (i) composed of a CoCr-based alloy having a saturation magnetization of between 10-50 emu/cm.sup.3 and (ii) having a thickness of between 10-60 .ANG..
A method of reducing anisotropy in a magnetic recording medium having an underlayer and a magnetic thin-film layer deposited sequentially on a substrate, said method comprising
- prior to sputtering said underlayer, depositing by sputter deposition a prelayer on said substrate, said prelayer (i) composed of a CoCr-based alloy having a saturation magnetization of between 10-50 emu/cm.sup.3 and (ii) having a thickness of between 10-60 .ANG..
Dependencies are inferred from the claim text.