US 6,982,944 B2 | ||
Optical recording medium having relation between groove depths and pit depths | ||
Masashi Suenaga, Moriya (Japan); and Yusuke Takahashi, Moriya (Japan) | ||
Assigned to Hitachi Maxell, Ltd., Ibaraki (Japan) | ||
Filed on Mar. 19, 2003, as Appl. No. 10/390,724. | ||
Claims priority of application No. 2002-079005 (JP), filed on Mar. 20, 2002; and application No. 2002-167462 (JP), filed on Jun. 07, 2002. | ||
Prior Publication US 2003/0193882 A1, Oct. 16, 2003 | ||
Int. Cl. G11B 11/00 (2006.01) |
U.S. Cl. 369—275.4 | 7 Claims |
1. An optical information-recording medium comprising:
a substrate which includes a land, a groove having a flat bottom surface, and in-groove pits having flat bottom surfaces,
respectively, formed on one surface of the substrate;
a recording layer which contains an organic dye and is formed on the one surface; and
a reflective layer which is formed on the recording layer, wherein:
dp/dg<Tp/Tg is satisfied provided that dg represents a depth from a land surface of the substrate to the bottom surface of
the groove, dp represents a depth from the land surface of the substrate to the bottom surface of the in-groove pit, Tg represents
a recess depth of the recording layer from an interface between the recording layer and the reflective layer on the land surface
to the interface between the recording layer and the reflective layer at the groove, and Tp represents a recess depth of the
recording layer from the interface between the recording layer and the reflective layer on the land surface to the interface
between the recording layer and the reflective layer at the in-groove pit.
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