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    • 5. 发明专利
    • AT398825T
    • 2008-07-15
    • AT05748110
    • 2005-05-30
    • KONINKL PHILIPS ELECTRONICS NV
    • MEINDERS ERWINNEIJZEN JACOBUS
    • G11B7/0045G11B7/013G11B7/24085G11B7/26
    • The invention relates to a record carrier comprising a train of marks and lands ( 14, 15, 23 ), which has a plurality of marks comprising shortest marks ( 1 ) and other marks ( 2 ) and a plurality of lands between said marks in a direction of said train of marks and lands comprising shortest lands ( 28 ) and other lands ( 27 ), said train of marks and lands ( 14, 15, 23 ) having information read by applying a light beam, and a land area not being part of said train of marks and lands. To provide a record carrier with an improved modulation of all marks without sacrificing tangential density and to further provide a record carrier with a reduced or substantially no asymmetry, it is proposed that said shortest marks ( 1 ) and leading and trailing edges ( 3 ) of said other marks ( 2 ) have a width larger than that of a central mark section ( 4 ) between said leading and trailing edges ( 3 ) of said other marks ( 2 ) and that said lands between said marks ( 19 ) in said direction of said train of marks and lands ( 15 ) have a reflectivity lower than that of said land area. The invention further relates to a method and a device for manufacturing such a record carrier.