Patent ID: 6607842
Filing Date: 2003-08-19
Classification: G11B,Y10T

Abstract:
A thin film magnetic disk comprising:a substrate; a pre-seed layer with an amorphous or nanocrystalline structure, said pre-seed layer being comprised of AlTa or AlTi; a non-magnetic ruthenium-aluminum (RuAl) seed layer deposited over the pre-seed layer; at least one non-magnetic underlayer deposited over the RuAl seed layer; at least one onset layer deposited over the underlayer, wherein said onset layer is comprised of CoCr and wherein the concentration of Cr is in the range of 28-33 at. %; and at least one magnetic layer deposited over the onset layer, wherein said magnetic layer is comprised of CoPtxCrBy, wherein x is the at. % concentration of Pt, Y is the at. % concentration of boron, and x>4+y.