Phase-change recording element for write once application

A WORM optical recording element (100) includes a substrate (121); an amorphous phase-change recording layer disposed over the substrate (123); a dielectric layer (124) disposed adjacent to the amorphous phase-change layer; a reflector layer (125) disposed adjacent to the dielectric layer; and where...

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Main Authors CUSHMAN, THOMAS RICHARD, VAZAN, FRIDRICH, BARNARD, JAMES ARTHUR, FARRUGGIA, GIUSEPPE, TYAN, YUAN-SHENG, OLIN, GEORGE RUSSELL, PRIMERANO, BRUNO
Format Patent
LanguageEnglish
French
German
Published 05.09.2007
Subjects
COLOUR PRINTING
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
LINING MACHINES
PERFORMING OPERATIONS
PHYSICS
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:A WORM optical recording element (100) includes a substrate (121); an amorphous phase-change recording layer disposed over the substrate (123); a dielectric layer (124) disposed adjacent to the amorphous phase-change layer; a reflector layer (125) disposed adjacent to the dielectric layer; and wherein the material and the thickness of the layers are selected such that recording can be performed on the optical recording element by using a focused laser beam to form crystalline marks in the phase-change layer using laser pulses with less than 40nS in duration, the reflectivity of the amorphous phase as measured by a collimated beam is higher than 28% and the contrast of the read-back signal is higher than 0.6, and the second and subsequent writing over previous recording results in at least a 50% increase in read out jitter.
Bibliography:Application Number: EP20020075549