| http://www.w3.org/ns/prov#value | - Compounds of these metals orsemimetals, such as sulfides, oxides, borates, silicates, carbides, nitrides and the like or mixtures of these metal or semimetal compounds with metals may also be employed for the recording layer.The recording layer can be formed by applying the above described material by sputtering, ion plating or other conventional method to a thickness of from about 100 .ANG. to 5,
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