Magnetic recording medium

Abstract

Abstract PURPOSE:To obtain a magnetic recording medium of good abrasion resistance and heat resistance by vapor-depositing a magnetic film of a metal of the Co- Ni-B-(Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W) system containing O and/or N on a heat-resistant plastic film. CONSTITUTION:If, on a heat-resistant plastic tape, a magnetic film composed of 10-30wt.% of Ni, 0.02-1.5wt.% of B, 0.02-5wt.% of Ti and the remainder being Co is vapor-deposited, the abrasion resistance of the deposited film improves due to Ni, and the borides of Ti, Zr,... disperse into the film improving the corrosion and abrasion resistances of the deposited film of the Co-Ni system. Futher, a film of 10-30% of Ni, 0.02-1.5% of B, 0.2-3% of O, 0.2-5% of Ti and the remainder being Co, or a film of 10-30% of Ni, 0.02-1.5% of B, 0.02-2% of N, 0.02-5% of Ti and the remainder being Co, or a film of 10-30% of Ni, 0.02-1.5% of B, 0.2-3% of O, 0.02-2% of N, 0.02-5% of Ti and the remainder being Co is deposited, the abrasion and heat resistances further improve. The film thicnkness may be 0.1-0.2mum.

Inventors

• 👤 Susumu Sawada
• 👤 沢田　進
• 👤 Osamu Kanano
• 👤 治 叶野

Bibliographic Details