Influence of seedlayer on film microstructure of Co-Cr-Pt longitudinal recording media fabricated on plastic substrates

Influences of seedlayer on surface and cross-sectional film structures are investigated for the magnetic recording media fabricated on a plastic disk substrate. An irregular film growth is observed when a recording medium con sisting of C/Co-Cr-Pt/Cr-Ti multilayer is deposited directly on an amorphou s polyolefin substrate. Zr or Ti seedlayer with hcp crystal structure is fo und to be useful in improving the film microstructure and is be comparable to that formed on a glass substrate. The recording media with Zr or Ti seed layer have desirable microstructure and surface flatness which are necessar y for high density magnetic recording applications.