Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMayumi Otoba, Noboru Yamada, Katsumi Kawahara, Hiroyuki Ohta, Eiji Ohno, Ken'ichi Nagata
Life of this patent
Estimating the term…
Abstract
The present invention provides an optical information medium having excellent weather resistance and repeating characteristics. The optical information medium has a barrier layer between a protective layer and a recording layer. The barrier layer includes GeN or GeON, and at least one element selected from the group consisting of Al, B, Ba, Bi, C, Ca, Ce, Cr, Dy, Eu, Ga, H, In, K, La, Mn, N, Nb, Ni, Pb, Pd, S, Si, Sb, Sn, Ta, T, Ti, W, Yb, Zn and Zr.
Claims33
1-31. (canceled)
A method of producing an optical information recording medium comprising:
- a first step of forming a protective layer;
- a second step of forming a recording layer generating a reversible phase-change which can be optically detected according to an irradiation of an energy beam, and
- a third step of forming a barrier layer by a high-frequency sputtering method in an atmosphere containing rare gas using a target containing a barrier material.
(canceled)
50-64. (canceled)
A method for producing an optical information recording medium comprising the steps of:
- forming a phase-change recording layer having reversibly changeable optical characteristics;
- and forming a Ge-containing layer comprising either one selected from the group consisting of GeXN and GeXON as a main component, where X is at least one element selected from the group consisting of elements belonging to Groups IIIa, IVa, Va, VIIa, VIIa, VIII, Ib and IIb and C,
- wherein the Ge-containing layer is produced by reactive sputtering with a target including at least Ge and X in a mixed gas comprising a rare gas and nitrogen.
67-69. (canceled)
(canceled)
Dependencies are inferred from the claim text.