Optical recording medium

Details Optical recording medium Optical recording medium

1995-05-30

1997-09-09

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

430945, 369284, G11B 724

Patent

active

056655207

ABSTRACT:
On one surface of a disk substrate, a first dielectric layer, a thin recording layer, a second dielectric layer and a reflecting layer are cumulatively formed. The second dielectric layer is thinner than the first dielectric layer and is 35-70 nm thick. The reflecting layer is 70-120 nm thick. The total thickness of the four layers is 250-430 nm. The compressire stress of the layers is offset by tensile stress generated by an overcoat resin protective layer, formed on the reflecting layer. A method of using the optical recording medium applies the MCAV (Modified Constant Angular Velocity) recording method which records information by changing recording frequencies in accordance with linear velocity. The linear velocity is 5-12 m/s. A ratio of an inner circumference recording pulse width to an outer circumference recording pulse width is 1.2 or more.

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Abstract of JP 4-141488, "Optical Recording Medium and Manufacture Thereof", Katsumi et al. (May 1992).
Abstract of JP 4-358334, "Optical Information Recording Medium", Hidemi et al. (Dec. 1992).

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