Patent ID: 7081277

Claim:
A method of making a magnetic disk, comprising the steps of: coating a disk surface with a lubricating layer comprising molecules having a photocrosslinking functional group; causing a crosslinking in said molecules by applying an optical radiation to said lubricating layer, wherein said step of causing said crosslinking is conducted by applying a substantially monochromatic far-ultraviolet radiation with a wavelength corresponding to an absorption wavelength of said photocrosslinking functional group as said optical radiation such that a bonding ratio is 85.5% or more in said coated lubricating layer, wherein said lubricating layer is excited optically in an ambient containing oxygen with a concentration of 10 ppm or less, wherein said far-ultraviolet radiation has a half-height width of 15 nm or less by a Xe 2 excimer radiation having a wavelength of 172 nm, wherein a source of said far-ultraviolet radiation is disposed with a separation distance of about 5 nm from said disk surface.