Quadrilayer optical draw medium

Details Quadrilayer optical draw medium Quadrilayer optical draw medium

G - Physics

11

B

42/2

G11B 7/24 (2006.01) G11B 7/257 (2006.01)

Patent

CA 1214933

-14- Abstract of the Disclosure Quadrilayer optical DRAW medium which differs from prior trilayer optical DRAW media by having a thin triggering layer adjacent each of the optical spacer and light-absorbing layers. The triggering layer is a material, preferably organic, which when heated by a modulated laser-diode beam to a temperature less than the melting point of the optical spacer layer develops substantial vapor pressure or otherwise rapidly expands to implement or enhance the formation of pits or bubbles in the light-absorbing layer without disturbing the optical spacer layer or its function of protecting the substrate of the medium.

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