Optical recording material and optical recording medium using same
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United States of America Patent
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Jun 22, 2004
Grant Date -
Dec 5, 2002
app pub date -
May 1, 2002
filing date -
Mar 29, 2001
priority date (Note) -
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Abstract
Disclosed in this invention is a phase change optical recording material for a rewritable recording medium with a high speed crystallization and excellent erasibility, which comprises a composition having the formula of: (A.sub.a B.sub.b C.sub.c).sub.x (Ge.sub.a Sb.sub.b Te.sub.c).sub.1-x wherein, A is an element selected from the elements belonging to the IVB group in the periodic table; B is an element selected from the elements belonging to the VB group in the periodic table; C is an element selected from the elements belonging to the VIB group in the periodic table; a, b and c are atomic ratios; x is a mole fraction in the range of 0 to 1; and at least one of A, B and C has a higher atomic number and thus a smaller diatomic bond strength than that of the corresponding element in the GeSbTe part.
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