Iron thin film magnetic recording tape by vacuum deposition

A thin-film video tape was formed by sputtering a protective layer on an iron thin film evaporated at an oblique incident beam angle on a plastic base film. The reproduction characteristics show that this tape is suitable for high density digital recording, with high output at short wavelength and low modulation noise. The area packing density can be raised to more than 130 M bits/in². Since the magnetic layer is easily damaged during tape-transport on VTR equipment, its durability requires improvement for practical comsumer products.