Information recording method of optical information recording medium
A technology for recording media and information recording, applied to optical recording carriers, information arrangements, tracks/pits, etc., to achieve lower precision requirements, shorter manufacturing processes, and easy identification
Active Publication Date: 2011-04-20
TAIYO YUDEN KK
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Problems solved by technology
However, the current situation is that if the DVD technology is directly applied to an optical disc other than DVD, although the length of the barcode and the recording position on the disc have been determined in specifications, its physical shape (or even structure) is not clear. Therefore there is no suitable method
Method used
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[0026] The preferred implementation modes for implementing the present invention will be described in detail below based on several examples.
[0027] FIG. 1 shows the condition on the disk at the time of barcode recording in this embodiment. As shown in FIG. 1(A), an optical disc 10 has a center hole 12 in the center, and a barcode 20 is recorded in a ring-shaped area (hereinafter referred to as "control information recording area") 14 near the center hole 12 . Main information such as moving pictures is recorded in the main information recording area 16 on the outer peripheral side.
[0028] In FIG. 2, the control information recording area 14 is shown enlarged, in which the grooves 14A and the lands 14B are formed. On the grooves 14A and the lands 14B, a recording layer is formed, which records information by decomposition of an organic dye. In the present embodiment, as shown in FIG. 2(A), barcode recording is performed by a narrow and long laser beam 30 . As a recordin...
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Abstract
There is provided a new medium structure to record a bar code for copyright protection or the like in an optical information recording medium capable of recording and reproducing information by a laser with respect to a dye. When a laser beam 30 is irradiated and an optical disc 10 is rotation in the direction of an arrow F, the dye of a recording layer is decomposed, a mark piece MA of a bar code 20 is formed, and a substrate is deformed by heat generated by the dye decomposition. Next, the position of the laser beam 30 is shifted to a position where a part overlaps with the mark piece MA, and when the optical disc is similarly rotated in the direction of the arrow F, a mark piece MB is formed to overlap with the mark piece MA. The above processing is repeated, so that the length of a bar is sequentially lengthened, and the bar code with a length along the standard is formed.
Description
[0001] This application is a divisional application of an invention patent application with an application date of October 8, 2005, an application number of 200510108274.3, and an invention title of "Optical Information Recording Medium and Its Manufacturing Method". technical field [0002] The present invention relates to an optical information recording medium, which belongs to the rewritable type (writable type) that can record or replay information on pigments by means of laser light like DVD-R, DVD+R, Blu-ray Disc, HD-DVD, etc. but not modifiable) optical information recording media; or rewritable (writable and modifiable) optical information recording media such as DVD-RAM, DVD-RW, etc. The present invention relates to a new medium structure capable of recording information for copyright protection and the like, and a manufacturing method thereof. Background technique [0003] The optical information recording medium has a structure in which a recording layer is fo...
Claims
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IPC IPC(8): G11B7/007G11B7/24094G11B7/24097G11B7/246
CPCG11B7/00736G11B7/2407G11B7/007
Inventor 清水宏郎藤井彻佐藤昌司兴津勋
Owner TAIYO YUDEN KK