×

Worm optical recording medium

  • US 8,147,942 B2
  • Filed: 04/01/2008
  • Issued: 04/03/2012
  • Est. Priority Date: 04/02/2007
  • Status: Active Grant
First Claim
Patent Images

1. A write-once-read-many optical recording medium, comprising:

  • a support substrate; and

    a recording layer and a layer adjacent to the recording layer on the support substrate, the recording layer containing an oxide of one of a metal and a metalloid as a principal component,wherein the recording layer includes a region where a constituent element of the adjacent layer is dispersed, andrecording and reproduction are performable with laser light of a blue wavelength region, andwherein the write-once-read-many optical recording medium further comprises;

    an additional layer adjacent to the recording layer, wherein positions at which a number of atoms of the one of the metal and the metalloid of the oxide is a half of a maximum of the number of atoms in the recording layer in an analysis of a composition of the write-once-read-many optical recording medium in a direction of a film thickness thereof are defined as interfaces between the recording layer and the adjacent layer and the additional adjacent layer, and a ratio of the element of the adjacent layer at a center of the recording layer is more than or equal to 5 at % of elements of the recording layer, the center of the recording layer being determined by the interfaces.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×