Multi-stack optical data storage medium and use of such medium

Details Multi-stack optical data storage medium and use of such medium Multi-stack optical data storage medium and use of such medium

2005-03-01

2005-03-01

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064500, C428S064600, C430S270130

Reexamination Certificate

active

06861117

ABSTRACT:
A description is given of multi-stack optical data storage medium (20) for rewritable recording by means of a focused laser-light beam (30), said medium (20) having a substrate (1) with deposited on a side thereof: a first recording slick (2) comprising a phase-change type recording layer (6)- at least one further recording stack (3) comprising a phase-change type recording layer (12),- a transparent spacer layer (9) adjacent each further recording stack (3). The further recording stack (3) is sufficiently transmissive to ensure proper sensitivity for reading and recording in the first recording stack (2). For this purpose, at least one heat sink layer (10) made of HfNx, and 1.1=×=1.6, is present in at least one of the recording stacks (3). The heat sink layer (10) further ensure proper cooling behavior of the recording layer (12) of the further recording stack (3) in order to obtain sufficient recording performance in the further recording stack (3).

REFERENCES:
patent: 6231945 (2001-05-01), Miyamoto et al.
patent: 6296915 (2001-10-01), Yusu et al.
patent: 6641887 (2003-11-01), Iida et al.

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