MAGNETIC RECORDING MEDIUM

摘要

Reproducible texturing of magnetic recording media is enhanced by sputtering a buffer layer (51), such as Ni-P, on a nonmagnetic substrate (50), prior to sputtering a textured bump layer (52). A magnetic recording medium comprising a sputter textured metal layer (54) and high coercivity is achieved by employing an underlayer (53), such as NiAl or FeAl, preferably a composite underlayer containing a chromium or chromium-alloy layer and a NiAl layer the sputter textured layer. Advantageously the buffer layer (51), underlayer (53), textured bump layer (52), magnetic layer (54) and carbon overcoat (55) can be sputter deposited in a single apparatus.