Patent ID: 7972662

Claim:
A process for producing a magnetic recording medium by forming a multi-layered film including a magnetic recording layer on a substrate for a magnetic recording medium, the process comprising transferring said substrate heated by irradiation with infrared rays at an average heating rate of at least 10° C./second in a heating zone, along consecutive film-forming zones synchronously into, and out of, the heating zone and each film-forming zone, and consecutively forming layers for constituting said multi-layered film in the film-forming zones to form the multi-layered film wherein the substrate for the magnetic recording medium is made of a glass or crystallized glass containing SiO 2 and Al 2 O 3 as essential components, the glass or crystallized glass having a region that has a spectral light transmittance of 50% or less converted in terms of a thickness of 2 mm in a wavelength range of 2,750 nm to 3,700 nm.