Magnetic recording medium, its production method and its use

Abstract From the Canadian patent

This invention provides a magnetic recording medium wherein visible patterns can be written in which a heat, sensitive layer is formed on a magnetic recording layer and a metallic thin layer is formed on said heat sensitive layer. The metallic thin layer of said magnetic recording medium can be roughed by using a material containing minute particles to form a roughed heat sensitive layer on the magnetic recording layer and then depositing the metallic thin layer on said heat sensitive layer. In using said magnetic recording medium information corresponding to at least a part of the information recorded in the magnetic recording layer can be written as visible patterns.