Optical memory medium

Details Optical memory medium Optical memory medium

1993-02-25

1997-02-25

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430962, 430945, 369284, G11B 724

Patent

active

056057792

ABSTRACT:
An optical memory medium having a transparent substrate, a recording layer and a reflective layer, the recording layer and the reflective layer being formed in this order on the transparent substrate. The recording layer is a diarylethene derivative dispersed in a non-polar polymeric binder. The optical memory medium with such a recording layer fully utilizes advantageous properties of the diarylethene derivative, such as good thermal stability of recorded state, excellent durability against repeated color changes between colored and colorless states, and photosensitive property to semiconductor laser light with a wavelength of 780 nm. The optical memory medium enables high-density recording and non-destructive readout.

REFERENCES:
patent: 4837063 (1989-06-01), Irie
patent: 5175079 (1992-12-01), Van et al.
patent: 5281501 (1994-01-01), Tatezono et al.
M. Irie et al., Denshizairyo, "Trend of the Development of Organic Photochromic Media", pp. 123-127 (Sep. 1991) (In Japanese - translation of certain sections provided).
M. Irie et al., Organic Synthesis Chemistry, 49:5, pp. 373-382 (May 1991) (In Japanese - translation of certain sections provided).

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