Patent ID: 7303829

Claim:
A magnetic recording medium comprising: an elongated nonmagnetic substrate; a first shielding layer, formed on said nonmagnetic substrate, being comprised of a metal or an alloy; a second shielding layer, formed on said first shielding layer, being comprised of a material which is more difficult to oxidize than said first shielding layer, wherein a total thickness of said first shielding layer and said second shielding layer is 2 to 50 nm; and a magnetic layer, formed on said second shielding layer by a vacuum thin film formation technique, having a thickness of 55 nm or less, wherein said first shielding layer is a metal layer comprised of at least one of Al, Ti, an alloy of Al, and an alloy of Ti, and wherein said second shielding layer is a metal layer comprised of any one of Ni, Cu, Ag, Au, and Pd.