Magnetic recording medium with high density, thin dual carbon overcoats

摘要

A magnetic recording medium is formed with dual carbon-containing protective layers having a combined thickness of less than about 100 Å with high corrosion resistance and superior magnetic performance. Embodiments of the present invention include sputter depositing a first protective layer of hydrogenated carbon at a density of at least 1.9 while applying a DC bias of about 250V to about 400V to the substrate, and sputter depositing a second protective layer comprising nitrogen-doped hydrogenated carbon on the first protective layer.