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High-density optical disk and process for producing the same

A manufacturing method, high-density technology, applied in the manufacture of optical record carriers, recording/reproducing by optical methods, optical record carriers, etc., which can solve problems such as damage to the objective lens, inability to perform data reading or recording, servo operation errors, etc. , to prevent damage

Inactive Publication Date: 2005-11-23
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Then, the above-mentioned focusing operation of the objective lens (OL) of the pickup 14 by moving up and down usually cannot perform normal data reading or recording.
Therefore, inside the servo controller 15 that controls the above-mentioned focusing operation, the objective lens (OL) of the above-mentioned pickup 14 is moved to the maximum distance (OD) in the direction perpendicular to the HD-DVD 10 max ), as a result, the objective lens (OL) of the pickup and the HD-DVD10 collide with each other, the high-density disc or the objective lens of the pickup is broken, or a fatal error occurs to the servo operation

Method used

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  • High-density optical disk and process for producing the same
  • High-density optical disk and process for producing the same
  • High-density optical disk and process for producing the same

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Embodiment Construction

[0028] first, Figure 6 Shown is the cross-sectional view and partial enlarged view of the high-density optical disc of the present invention, the above-mentioned high-density optical disc, for example, the high-density DVD20 has the following image 3 The disc thickness shown is 1.2mm, the disc diameter is 120mm, the center hole (Center Hole) is 15mm in diameter, and the clamping area with a diameter of 44mm is clamped by the turntable and clamping circuit (Clamper) in the disc device .

[0029] In addition, a data recording layer recorded in a pit pattern is provided at a position at an interval of about 1.1 mm in the direction facing the objective lens (OL) of the pickup of the optical disc device. The object lens (OL) of the pick-up is then installed in the guide area (lead in) of the above-mentioned HD-DVD 20, for example, the area on the side surface of the guide area in the diameter of HD-DVD is 45.2mm-48mm interval.

[0030] On the other hand, the above-mentioned ann...

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Abstract

The invention relates to a high density compact disk and method of manufacture, wherein an annular recess with a predetermined depth and width is arranged on the upper and lower surface of the high density compact disk guiding zone e.g. DVD (HD-DVD), which can completely prevent the damage of the object lens of the high density compact disk or optical pickup device or the fatal error caused to servo operation.

Description

(1) Technical field [0001] The present invention relates to a kind of high-density optical disk and its manufacturing method, especially refers to the optical disk used for playing and recording information in high-density optical disks such as high-density DVD (HD-DVD: High Density Digital Versatile Disc) when the high-density optical disk is wrongly inserted When installing, prevent the resulting collision between the optical disc and the objective lens of the pickup. (2) Background technology [0002] Ordinary optical discs (hereinafter referred to as CDs or CD discs), such as figure 1 As shown, its thickness is 1.2mm, its diameter is 120mm, and it has a central hole with a diameter of 15mm. The data recording layer recorded on the above-mentioned CD with a pit pattern (pit pattern) is arranged in the direction opposite to the objective lens (OL) of the optical pickup in the above-mentioned optical disk device at a position of about 1.2 mm apart, for the above-mentioned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007G11B7/24085G11B7/254G11B7/26
Inventor 金知德
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI