发明名称 OPTICAL RECORDING MEDIUM AND ITS MANUFACTURE
摘要 PURPOSE:To realize high-speed access on tracks without causing access errors by providing several nonrecording parts having low reflectivity disposed with intervals in the recording layer. CONSTITUTION:The optical recording medium 1 essentially consists of a disk- type glass substrate 3 the surface of which has concentrical rough areas 2, the recording layer 4 uniformly provided on the substrate, and a protective layer 5 uniformly provided on the recording layer 4 side of the substrate 3. The recording layer contains nonrecording parts 6 formed on rough surface parts 2' of the rough areas 2 and recording parts 7 formed on the flat area 2'' provided between the rough areas 2. As the intensity of reflected light from the nonrecording part 6 is weak compared to that of reflected light from the recording part 7 between the nonrecording parts 6, difference between the two reflected lights becomes large. Therefore, only the track-crossing signals with low output generated when a head crosses the nonrecording part 6 can be certainly extracted according to the difference of reflected lights. Thus, the access speed on tracks can be raised.
申请公布号 JPH0253236(A) 申请公布日期 1990.02.22
申请号 JP19880203120 申请日期 1988.08.17
申请人 FUJI XEROX CO LTD 发明人 UENO OSAMU;KAMIYANAGI KIICHI;GOTO HIRONORI
分类号 B41M5/26;G11B7/24;G11B7/26;G11B11/10;G11B11/105 主分类号 B41M5/26
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