摘要:
In a magneto-optical recording medium comprising a first dielectric layer, a recording layer, a second dielectric layer, and a metal reflective layer stacked on a substrate, the second dielectric layer is formed of a mixture of a rare earth element oxide, silicon oxide, and silicon nitride. The medium has increased recording sensitivity and provides stable recording/reproducing performance with low error rate and high resolution.
摘要:
In a magneto-optical recording disc of the magnetic field modulation recording mode, recording of information for the first time is carried out in an optical modulation mode at a linear velocity which is higher than a reading linear velocity. The time required for recording is reduced while the recorded disc produces satisfactory outputs on playback.
摘要:
A magneto-optical disk is made up of a disk form of substrate including on its surface a recessed area having at least one of a groove and pits, and a recording layer provided such that it covers the recessed area. The geometry of at least one of the groove and pits is designed to conform to .theta..sub.10 .gtoreq..theta..sub.50 and .theta..sub.50 >.theta..sub.90 where .theta..sub.10, .theta..sub.50 and .theta..sub.90 are respectively the angles that tangential lines make with horizontal lines at 10%, 50% and 90% depth positions of a side wall of the recess in the diametrical direction of the substrate. This magneto-optical disk is improved in terms of the push-pull signal level, radial contrast, skew margin and C/N.
摘要:
An optical recording medium comprising a recording layer on a substrate and a protective layer formed adjacent to the upper and/or lower surface of the recording layer is more durable and corrosion resistant when the protective layer has a composition comprising, in % by weight, 40-60% of SiO.sub.2, 0.5-10% of an alkali metal oxide, 10-59.5% of Al.sub.2 O.sub.3 and/or B.sub.2 O.sub.3, and optionally up to 50% of a divalent metal oxide.
摘要翻译:包括基底上的记录层和与记录层的上表面和/或下表面相邻形成的保护层的光学记录介质在保护层具有以重量%计含有40份 -60%的SiO 2,0.5-10%的碱金属氧化物,10-59.5%的Al 2 O 3和/或B 2 O 3,以及任选的至多50%的二价金属氧化物。