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Optical recording medium, production method of optical recording medium, optical recording method and optical reproducing method for optical recording medium

A technology of optical recording medium and manufacturing method, which is applied in the direction of light beam reproduction, magnetic recording, data recording, etc., can solve the problems of difficult ridges to obtain recording power tolerance characteristics, poor bottom jitter characteristics, etc., and achieve improved bottom jitter characteristics , Improve string writing, increase the effect of groove depth

Inactive Publication Date: 2004-09-01
SONY CORP
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Problems solved by technology

[0026] However, under the above conditions, it is difficult to obtain satisfactory recording power tolerance characteristics at the land
In addition, the bottom jitter characteristics of lands are also inferior to those of grooves, and there arises a problem that the characteristics of land recording and groove recording cannot be balanced to a degree suitable for practical use.

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  • Optical recording medium, production method of optical recording medium, optical recording method and optical reproducing method for optical recording medium
  • Optical recording medium, production method of optical recording medium, optical recording method and optical reproducing method for optical recording medium
  • Optical recording medium, production method of optical recording medium, optical recording method and optical reproducing method for optical recording medium

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[0064] The optical recording medium according to the present invention has the structure of the optical recording medium of the DWDD reproduction method using the land and groove recording system, that is, the structure of the magneto-optical recording medium as described above. An optical recording medium according to an embodiment of the present invention has a configuration as shown in FIGS. 1 and 3 .

[0065] However, it goes without saying that the optical recording medium according to the present invention is not limited to the above structure.

[0066] In this embodiment, as shown in FIG. 1, on an optical recording medium substrate made of, for example, a suitable resin such as polycarbonate (PC) or polymethylmethacrylate (PMMA), or other suitable substrate material such as a glass substrate On one main surface of 1, a plurality of grooves 3 arranged in parallel in, for example, a multiple helix or in a concentric circular manner are formed, and ridges 5 are formed betw...

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Abstract

In a DWDD (Domain Wall Displacement Detection) optical recording medium of a land and groove recording system, characteristics of a land and a groove can be well equilibrated by selecting a depth d (nm) of a groove 3 of an optical recording medium so as to satisfy the following equation: 3lambda / 8n G11B 11 / 105 14 19 0 2002 / 4 / 23 1526134 2004 / 9 / 1 000000000 Sony Corp. Japan Fujita Goro Sakamoto Tetsuhiro feng gengxuan 11038 The Patent Agency of the Chinese Council for the Promotion of International Trade (CCPIT) No.1 Waidajie, Fuxingmen, Beijing 100086 Japan 2001 / 4 / 24 126158 / 2001 2003 / 11 / 14 PCT / JP2002 / 004027 2002 / 4 / 23 WO2002 / 089129 2002 / 11 / 7 Japanese

Description

technical field [0001] The present invention relates to a domain wall displacement detection optical recording medium of a land and groove recording system, that is, a so-called DWDD optical recording medium, a manufacturing method of an optical recording medium, an optical recording method of an optical recording medium, and an optical recording medium. Optical reproduction method of a recording medium, particularly, the present invention relates to a domain wall displacement detection optical recording medium in which land characteristics and groove characteristics can be satisfactorily balanced, an optical recording medium manufacturing method, an optical recording medium An optical recording method and an optical reproduction method of an optical recording medium. Background technique [0002] In recent years, with the improvement of the recording density of the optical recording medium, in order to increase the recording density of the optical recording medium, for exam...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B11/105
CPCG11B11/10578G11B11/105
Inventor 藤田五郎板本哲洋
Owner SONY CORP
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