Patent ID: 6120836
Filing Date: 2000-09-19
Classification: G11B

Abstract:
A process for producing a magnetic recording medium comprising a nonmagnetic support having a magnetic layer comprising a ferromagnetic metal thin film formed on at least one side surface of said nonmagnetic support, and an undercoating layer, said process comprising the steps of, in order:coating as an undercoating layer on at least one side surface of said nonmagnetic support a coating solution comprising a silicon-containing compound or metal-containing compound dissolved in a solvent and heat-resistant fine particles;drying said nonmagnetic support having said coating solution to hydrolyze and polymerize said silicon-containing compound or metal-containing compound to form a silica film comprising a network made up mainly of silicon-oxygen bonds or a metal oxide film comprising a network made up mainly of metal-oxygen bonds, containing said heat-resistant fine particles thereby obtaining said undercoating layer; and then forming a ferromagnetic metal thin film on said undercoating layer with a vacuum film-forming method.