 Metal detector |
| Accordingly, it is a general object of the invention to provide a novel and improved metal detector ... |
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| Safety unit actuating device |
| The present invention relates to an actuating device for operating a safety unit such as a crossing ... |
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| Electronic timepiece |
| Generally speaking, in accordance with the invention, a chronographic timepiece adapted to round ... |
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| Image recording apparatus with recording medium quanity detecting means |
| The present invention has been made in consideration of this and has as its object to provide an ... |
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| Image transmission or encoding apparatus |
| It is an object of the present invention to provide an image transmission apparatus solving the ... |
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| Telephone apparatus for invalidating incoming call signals during dialing |
| An object of the present invention is to provide an telephone apparatus which improves upon ... |
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| Apparatus and method for facsimile transmission of synthesized images |
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Optical information recording medium
| Details |
Inventors: Harigaya, Makoto; Ide, Yukio; Kageyama, Yoshiyuki; Iwasaki, Hiroko;
Assignee: Ricoh Company, Ltd. (Tokyo, JP)
Primary Examiner: Levy; Stuart S.
Assistant Examiner: Nguyen; Hoa
Attorney, Agent or Firm: Cooper & Dunham
An optical information recording medium is composed of a substrate and a recording layer, formed thereon, which recording layer causes the reversible phase change by the application of an electromagnetic wave thereto, and comprises a phase-changeable type alloy with the composition of (XYZ.sub.2).sub.1-x M.sub.x, wherein X is an element of the group Ib, Y is an element of the group Va, Z is an element of the group VIa, M is an element selected from the group consisting of Sb, Bi, In, Al and Ga, and 0<x<1. |
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DETAILED DESCRIPTION What is claimed is: 1.
An optical information recording medium comprising a substrate and a recording layer formed on said substrate whose phase is reversibly changeable under application of electromagnetic waves thereto, said recording layer comprising a phase-changeable type alloy with the composition of (XYZ.
sub.
2).
sub.
1-x M.
sub.
x, wherein X is one element selected from the elements of group Ib of the periodic table, Y is one element selected from the elements of group Va of the periodic table, Z is one element selected from the elements of group VIa of the periodic table, M is one element selected from the group consisting of Sb, Bi, In, Al and Ga, and 0<.
times.
<1.
2.
The optical information recording medium as claimed in claim 1, wherein said recording layer comprises a phase-changeable type alloy with the composition of (XYZ.
sub.
2).
sub.
1-x M.
sub.
x, wherein M is an element of Sb or Bi, and 0.
35.
ltoreq.
.
times.
.
ltoreq.
0.
95.
3.
The optical information recording medium as claimed in claim 2, wherein said composition of (XYZ.
sub.
2).
sub.
1-x M.
sub.
x, 0.
5.
ltoreq.
.
times.
.
ltoreq.
0.
9.
4.
The optical information recording medium as claimed in claim 2, wherein said phase-changeable type alloy with the composition of (XYZ.
sub.
2).
sub.
1-x M.
sub.
x is selected from the group consisting of (AgSbTe.
sub.
2).
sub.
1-x Sb.
sub.
x, (AgSbSe.
sub.
2).
sub.
1-x Sb.
sub.
x, (CuSbTe.
sub.
2).
sub.
1-x Sb.
sub.
x, (CuSbSe.
sub.
2).
sub.
1-x Sb.
sub.
x, (AgBiTe.
sub.
2).
sub.
1-x Sb.
sub.
x, (AgBiSe.
sub.
2).
sub.
1-x Sb.
sub.
x, (CuBiTe.
sub.
2).
sub.
1-x Sb.
sub.
x, (CuBiSe.
sub.
2).
sub.
1-x Sb.
sub.
x, (AgSbTe.
sub.
2).
sub.
1-x Bi.
sub.
x, (AgSbSe.
sub.
2).
sub.
1-x Bi.
sub.
x, (CuSbTe.
sub.
2).
sub.
1-x Bi.
sub.
x, (AgBiTe.
sub.
2).
sub.
1-x Bi.
sub.
x and (CuBiTe.
sub.
2).
sub.
1-x Bi.
sub.
x.
5.
The optical information recording medium as claimed in claim 1, wherein said recording layer comprises a phase-changeable type alloy with the composition of (XYZ.
sub.
2).
sub.
1-x M.
sub.
x, wherein M is an element of In, Al or Ga, and 0.
1.
ltoreq.
.
times.
.
ltoreq.
0.
8.
6
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Caller ID 
