Protective layer for optical information recording medium

  • US 4,847,132 A
  • Filed: 10/15/1987
  • Issued: 07/11/1989
  • Est. Priority Date: 10/20/1986
  • Status: Expired due to Term
First Claim
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1. An optical information recording medium comprising heat resistant protective layers, which are interfaced with a single side or both sides of an active recording layer, all of said layers being formed on a substrate successively layer by layer, and said protective layers consisting of a homogeneously mixed substance consisting of several constituent compounds, wherein at least two of said constituent compounds do not form a solid solution with each other.

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