Patent ID: 6410115
Filing Date: 2002-06-25
Classification: B82Y,G11B,Y10S,Y10T

Abstract:
A high density multi-rewritable optical recording medium comprising:a transparent substrate; a first dielectric layer formed on said transparent substrate; a phase-change recording layer formed on said first dielectric layer; a second dielectric layer formed on said phase-change recording layer; a metal layer formed on said second dielectric layer; a third dielectric layer formed on said metal layer; and a UV coating layer formed on said third dielectric layer, whereby a surface plasmon is generated in the interface between said third dielectric layer and said metal layer when a laser beam with a wavelength in the range from 300 nm to 800 nm irradiates toward said UV coating layer, and obtains the enhancement effect of the near-field intensity so as to achieve a high resolution for distinguishing minute pits.