The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 03, 1996
Filed:
Aug. 17, 1994
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
The present invention provides an information recording medium including a first recording film formed on a substrate and having an amorphous phase made of an alloy containing at least Ge and Te, and a second recording film formed on the first recording film and made of a material with a relatively large light absorption coefficient, wherein the alloy of the first recording film exhibits a Raman scattering spectrum having scattering peaks at 140 to 160 cm.sup.-1 and 120 to 130 cm.sup.-1 and no scattering peaks at 100 to 110 cm.sup.-1, and recording is performed by changing optical characteristics by alloying the materials of the first and second recording films by radiating recording light on the first and second recording films. The present invention provides an information recording medium including a recording film formed on a substrate and having an amorphous phase made of an alloy containing Ge, Sb, and Te, wherein the amorphous phase of the recording film is a mixed phase containing cluster molecules containing of two elements, Ge--Te and/or Sb--Te, and recording is performed by changing optical characteristics by changing in phase the cluster molecules into corresponding crystalline GeTe and crystalline SbTe by radiating recording light on the recording film.