Optical data carrier comprising a phthalocyanine dye as...

Details Optical data carrier comprising a phthalocyanine dye as... Optical data carrier comprising a phthalocyanine dye as...

2005-05-24

2005-05-24

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064800, C430S270140, C430S270160

Reexamination Certificate

active

06896945

ABSTRACT:
The invention relates to an optical data carrier having a preferably transparent substrate that has optionally previously been coated with one or more reflection layers and to the surface of which has been applied a light-writeable information layer, optionally one or more reflection layers, and optionally a protective layer or a further substrate or a covering layer, such that the optical data carrier can be written on or read by means of blue light (preferably laser light having a specified wavelength) or by means of infrared light (preferably laser light having a specified wavelength), wherein the information layer contains(i) light-absorbent phthalocyanine dyes of the formula (I)whereMe is a doubly axially substituted Si, Ge, and Sn atom,Pc is an unsubstituted phthalocyanine, andX1and X2are each independently halogen, and(ii) optionally, a binder.

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Patent Abstracts of Japan vol. 1999, No. 08, 30. Juni. 1999 & JP 11 058953 A (Matsushita Electric Ind Co Ltd), 2. Marz 1999 Zusammenfassung.

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