Patent ID: 6645551
Filing Date: 2003-11-11
Classification: G11B

Abstract:
A method for obtaining a lattice parameter for a non-magnetic underlayer in the manufacture of a magnetic recording medium comprising a substrate, a non-magnetic underlayer over the substrate and a magnetic layer on the underlayer, comprising:determining a lattice parameter for the magnetic layer; selecting a plurality of non-magnetic, chromium-based layers for the underlayer, at least one of said chromium-based layers being a chromium alloy, and the chromium-based layers having different elemental compositions; choosing a fractional thickness for each of the chromium-based layers according to the lattice parameter of the magnetic layer, the sum of the fractional thicknesses for each of the chromium-based layers being equal to the underlayer thickness; depositing the chromium-based layers over the substrate; and depositing the magnetic layer on and in contact with one of the chromium-based layers.