Patent ID: 6086796
Filing Date: 2000-07-11
Classification: C23C,Y10S,Y10T

Abstract:
A method for producing protective coatings on the surface of recording media for use with near-field optical head devices comprising the sequential steps of:(a) depositing a composite optical phase-change recording layer onto a substrate;(b) depositing a dielectric interlayer onto said composite optical phase-change recording layer;(c) depositing an adhesion-promoting interlayer comprising germanium onto said dielectric interlayer in an evacuated deposition vacuum chamber;(d) ion beam depositing an outer layer of DLC to a thickness of no greater than about 450 .ANG. onto said adhesion-promoting interlayer in said evacuated deposition vacuum chamber such that the combined thicknesses of said DLC outer layer, the combined thicknesses of said dielectric interlayer and said adhesion-promoting interlayer are no greater than 500 .ANG.;(e) increasing the vacuum chamber pressure to atmospheric pressure; and(f) recovering coated optical phase-change recording media having improved resistance to wear, abrasion and corrosion.