Stock material or miscellaneous articles – Circular sheet or circular blank
Reexamination Certificate
2005-02-22
2005-02-22
Hess, B. Hamilton (Department: 1774)
Stock material or miscellaneous articles
Circular sheet or circular blank
C428S064200, C428S064500, C430S270130
Reexamination Certificate
active
06858277
ABSTRACT:
An information recording medium having such a recording material layer on a substrate where reversible phase change between electrically or optically detectable states can be caused by electric energy or electromagnetic energy. The recording material forming the recording layer is either a material having a crystal structure including lattice defects in one phase of the reversible phase change or a material having a complex phase composed of a crystal portion including a lattice defect in one phase of the reversible phase change and an amorphous portion. Both portions contain a common element. A part of the lattice defects are filled with an element other than the element constituting the crystal structure. The recording medium having a recording thin film exhibits little variation of the recording and reproduction characteristics even after repetition of recording and reproduction, excellent weatherability, strong resistance against composition variation, and easily controllable characteristics.
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Kawahara Katsumi
Kojima Rie
Matsunaga Toshiyuki
Yamada Noboru
Ferguson L.
Hess B. Hamilton
Merchant & Gould P.C.
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