Optical recording medium and recording and reproducing method using the same

  • US 5,974,025 A
  • Filed: 08/13/1998
  • Issued: 10/26/1999
  • Est. Priority Date: 08/15/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. An optical recording medium capable of recording and erasing information, comprising:

  • a substrate, a first dielectric layer, a recording layer, a second dielectric layer, a light reflection and heat dissipation layer, and an overcoat layer, said first dielectric layer, said recording layer, said second dielectric layer, said light reflection and heat dissipation layer, and said overcoat layer being successively overlaid on said substrate,said recording layer (1) comprising a phase-change recording material which comprises as constituent elements Ag, In, Sb, Te, and N and/or O with the respective atomic % thereof being α

    , β

    , γ

    , δ and

    ε

    (the total atomic % of N and/or O), which are in the relationship of;

    0<

    α



    6,3≦

    β



    15,50≦

    γ



    65,20≦

    δ



    35,0≦

    ε



    5, provided that α









    =100, and (2) having a recrystallization upper-limit linear speed in a range of 2.5 to 5.0 m/s.

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