Loading patent…
AssigneeSeagate Technology LLC
InventorsThomas Patrick Nolan, Zhong (Stella) Wu, Samuel Dacke Harkness, IV
Estimating the term…
A perpendicular magnetic recording medium having a substrate, an amorphous soft underlayer of thickness 30 nm or greater, and a granular magnetic recording layer for perpendicular recording is disclosed. The granular magnetic recording layer includes a non-magnetic region between magnetic grains, wherein the non-magnetic region includes metal nitride or metal carbide and provides exchange decoupling between the magnetic grains. The perpendicular recording medium of this invention reduces DC noise and increases media signal-to-noise ratio; it reduces surface roughness, which in turn reduces the head-to-media spacing and the head-to-amorphous soft underlayer spacing.
A method comprising forming a magnetic recording layer on a substrate via reactive sputtering in an atmosphere containing at least one of NH3 or hydrocarbon gas, wherein the formed magnetic recording layer includes non-magnetic regions between magnetic grains, the non-magnetic regions comprising at least one of a metal nitride or metal carbide.
The method of claim 15, wherein the magnetic recording layer has a thickness of less than approximately 12 nm.
A magnetic recording layer medium comprising:
Dependencies are inferred from the claim text.