Optical information recording medium and method of producing the

Details Optical information recording medium and method of producing the Optical information recording medium and method of producing the

1997-03-25

1999-03-16

Evans, Elizabeth

Stock material or miscellaneous articles

Circular sheet or circular blank

428 644, 428 648, 428913, 43027014, 43027017, 4304951, 430945, 369283, 369288, B32B 300

Patent

active

058827579

ABSTRACT:
An optical information recording medium includes a substrate, and a light absorption layer formed thereon which includes a phthalocyanine compound (I) having a thermal decomposition temperature in a range of 250.degree. C. to 350.degree. C., measured by thermogravimetry with a temperature elevation rate of 10.degree. C. and a phthalocyanine compound (II) having a thermal decomposition temperature in a range of 350.degree. C. to 450.degree. C., measured by thermogravimetry with a temperature elevation rate of 10.degree. C. This optical information recording medium can be produced by providing the light absorption layer, directly or via an intermediate layer, on a substrate with information pits and/or guide grooves being on the surface thereof by film formation coating, providing a light reflection layer, directly or via an intermediate layer, on the light absorption layer by vacuum film formation, and providing a protective layer on the light reflection layer.

REFERENCES:
patent: 5169745 (1992-12-01), Yashiro et al.
patent: 5238722 (1993-08-01), Yashiro et al.
patent: 5242730 (1993-09-01), Yashiro et al.
patent: 5252372 (1993-10-01), Yashiro et al.
patent: 5536548 (1996-07-01), Yasukama et al.

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