Method of producing a magnetic recording medium

Details Method of producing a magnetic recording medium Method of producing a magnetic recording medium

1995-01-13

1997-12-02

Breneman, R. Bruce

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

20419215, 20419212, C23C 1434

Patent

active

056931980

ABSTRACT:
A method for forming a magnetic recording medium having a chromium underlayer and a magnetic recording layer is described. The method includes sputtering the underlayer and the magnetic layer in a single sputtering chamber from a two-region target having an inner chromium region and an outer magnetic region. Each target region is successively energized for sputter deposition of each layer.

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Cord, B., et al., "Sputtering of High Coercivity/Low Noise CoCrTa Bilayered Hard Disks in Production of System," IEEE Trans. Magn. 29(6): 3694 (1993).
Ranjan et al. "Magnetic, recording and crystalline properties of multilayered longitudinal thin-film media" J. Appl. Phys. 69(8), 15 Apr. 1991 4727-4729.

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