Information recording medium, method and apparatus for manufacturing the same
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United States of America Patent
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Aug 9, 2011
Grant Date -
Feb 12, 2009
app pub date -
Dec 18, 2006
filing date -
Jan 31, 2006
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Abstract
An information recording medium of the present invention includes recording layers 19 and 26 whose phase can change by an optical or an electrical system so as to be detectable, and interface layers 18, 20, 25 and 27, which are in contact with the recording layers 19 and 26, to serve as oxide layers. The recording layer 19 contains a Ge--Bi--Te-M material represented by a formula: Ge.sub..alpha.Bi.sub..beta.Te.sub..gamma.M.sub.100-.alpha.-.beta.-.gamma. (atom %), where M denotes at least one element selected from Al, Ga, In and Mn, and .alpha., .beta. and .gamma. satisfy 25.ltoreq..alpha..ltoreq.60, 0<.beta..ltoreq.18, 35.ltoreq..gamma..ltoreq.55, and 82.ltoreq..alpha.+.beta.+.gamma.<100. The interface layers 18, 20, 25 and 27 contain at least one oxide of the element M contained in the recording layers 19 and 26.
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