METHOD OF CONTROL OF THE MAGNETIC PROPERTIES OF A MAGNETIC LAYER OF FINE FILM RECORDING, MAGNETIC RECORDING HARD DISK AND MANUFACTURING METHOD OF THE SAME

摘要

The magnetic properties of a cobalt based, thin film, magnetic recording layer (14) are controlled, independent of controlling the process for depositing the magnetic layer itself, by the introduction of process compatible dopant gases into an argon atmosphere during the vacuum deposition (i.e. a sputtering process or an evaporation process) of a chromium based underlayer (15) upon which the magnetic layer (14) is subsequently deposited. The same or a different dopant may also be introduced into the magnetic layer. The process compatible dopant gases described contain oxygen, nitrogen and/or carbon, and mixtures thereof, and include the group purified air, oxygen, nitrogen, a mixture of oxygen and nitrogen, carbon monoxide, carbon dioxide, methane and water vapor. IMAGE