JPS6476524A - Magnetic recording medium and production thereof - Google Patents

Abstract

PURPOSE:To substantially eliminate the boundary face between an underlying layer and magnetic recording layer so that the contamination at the boundary face is prevented and magnetic characteristics are improved by forming a layer in which the underlying layer forming material and the magnetic recording layer forming material co-exist near to the boundary face between the underlying layer and the magnetic recording layer. CONSTITUTION:The material of the underlying layer 2 is deposited on a substrate 1. The deposition of the material for the magnetic recording layer 4 is started simultaneously with the deposition of the underlying layer material when the film thickness thereof approaches to a prescribed value. The deposition of the underlying layer 2 material is thereafter stopped and only the magnetic recording layer 4 material is deposited. The layer 3 in which the underlying layer forming material and the magnetic recording layer forming material co-exist is, therefore, formed near the boundary face between the underlying layer 2 and the magnetic recording layer 4. The boundary face between the underlying layer and the magnetic recording layer exposed into impurity gases is thereby eliminated and the contamination of the boundary face is obviated. The deterioration in and unstability of the magnetic characteristics occurring in the contamination are thereby eliminated.