Optical information recording medium and manufacturing method of the same
A technology for recording media and optical information, applied in optical recording media, optical recording/reproduction, information storage, etc., can solve problems such as unclear physical shape and structure
Active Publication Date: 2011-01-12
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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Embodiment Construction
[0022] The preferred implementation modes for implementing the present invention will be described in detail below based on several examples.
[0023] exist figure 1 The state on the disk at the time of barcode recording of this embodiment is shown in . Such as figure 1 As shown in (A), the 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.
[0024] exist figure 2 The control information recording region 14 in which the grooves 14A and the lands 14B are formed is shown enlarged. On the grooves 14A and the lands 14B, a recording layer is formed, which records information by decomposition of an organic dye. In this example, if figure 2 As shown in (A), barcode recording is performed by a narrow and long ...
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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
technical field [0001] 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. Background technique [0002] The optical information recording medium has a structure in which a recording layer is formed on a substrate, and information is recorded in the recording layer. Such an optical information recording medium includes, for example, a DVD, etc. In this DVD, in addition to the main information recording area for recording moving images, etc., there are also sub information recording areas for recor...
Claims
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IPC IPC(8): G11B20/10G11B23/30G11B7/00G06K19/00G06F12/14G11B7/24094G11B7/24097G11B7/246
CPCG11B7/00736G11B7/2407G11B7/007
Inventor 清水宏郎藤井彻佐藤昌司兴津勋
Owner TAIYO YUDEN KK