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    • 21. 发明授权
    • Optical recording medium
    • 光记录介质
    • US07924696B2
    • 2011-04-12
    • US12270313
    • 2008-11-13
    • Hironori KakiuchiHideo FujiiNorihiro Jiko
    • Hironori KakiuchiHideo FujiiNorihiro Jiko
    • G11B7/24
    • G11B7/24079G11B7/00451
    • An optical recording medium of a pitting recording type, to which recording marks are formed by irradiation with a violet laser beam having a wavelength λ in the range of about 380 to about 450 nm, includes a substrate having a surface provided with guide grooves and lands, and a metal recording layer in which recording marks are formed by irradiation with a laser beam. The guide grooves and the lands meet conditions expressed by: λ/18≦DG≦λ/11  (1) 1.5≦WG/WL≦3.5  (2) Where λ is the wavelength of the laser beam used for writing and reading, DG, is the depth of the grooves, WG is the width of the grooves, and WL is the width of lands formed on the substrate, and the wavelength λ is in the range of 380 to 450 nm.
    • 点蚀记录型的光记录介质,其中通过用波长λ在约380至约450nm范围内的紫色激光束照射而形成记录标记的光记录介质包括具有设置有引导槽和焊盘的表面的基板 以及通过照射激光而形成记录标记的金属记录层。 引导槽和焊盘满足以下条件:λ/ 18≦̸ DG≦̸λ/ 11(1)1.5≦̸ WG / WL≦̸ 3.5(2)其中λ是用于写入和读取的激光束的波长,DG 是槽的深度,WG是槽的宽度,WL是形成在基板上的焊盘的宽度,并且波长λ在380〜450nm的范围内。