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High-density CD and its making process

A production method and high-density technology, which are applied in the directions of recording/reproducing by optical methods, manufacturing of optical record carriers, optical record carriers, etc., can solve the problems of large error value, high cost, non-standard ablation pits, etc. The production process is simple, the use is convenient, and the cost is low.

Inactive Publication Date: 2003-02-26
广东省宝月矿山机械厂 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to technical problems, some write-in optical discs have non-standard ablation pits and large error values, so the versatility of laser machine reading is not good; this disc is suitable for individuals and small quantities of units. Due to the high cost, the batch copying speed is slow , not suitable for mass production

Method used

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  • High-density CD and its making process
  • High-density CD and its making process
  • High-density CD and its making process

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Embodiment Construction

[0017] Such as Figure 1~2 Shown, a kind of high-density disc manufacturing method is characterized in that a) blow molding standard film base; b) coating photosensitive layer on the surface of the film base; c) exposure and washing by ultraviolet light; d) forming black spots ( signal); e) vacuum aluminized film layer;

[0018] A high-density optical disc is characterized in that a protective layer 3 is provided on a film base 1, and a photosensitive layer 2 is arranged between the film base 1 and the protective layer 3. The present invention adopts the chemical type to directly obtain the black dot signal, and uses the conventional flushing method. At the same time, due to the use of chemical raw materials to form a signal group, a one-time program CD can be derived (that is, after the protective film bag is opened, the signal is oxidized by air components, causing chemical changes to lose the signal). Such as image 3 As shown, when the laser beam hits the convex island ...

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Abstract

The present invention relates to CD, especially a high-density CD and its making process. The said making process includes blow-molding to form standard film base, painting photosensitive layer, ultraviolet light exposure and development, forming black spot signal and vacuum aluminum plating. The said high-density CD has protecting layer on the film base and photosensitive layer between the protection layer and the film base. It has the advantages of sharp contrast in the signal dark spot and no-signal place, easy production of jumping signal, simple production process, low cost, etc.

Description

Technical field [0001] The invention relates to an optical disc, in particular to a high-density optical disc and a manufacturing method thereof. Background technique [0002] At present, there are two main types of optical disc production processes: [0003] 1. Injection molding press model: the intensity of signal reflection brightness is obtained by pit diffraction method, and the process of forming signal (pits), aluminized film, coating protective layer and other processes by stamping mold is fully automated in one production line; the formation of pit signals must be strictly Control the height, width, and length of the pit (0.11rm*0.8rm*3.3rm), which belongs to a microscopic three-dimensional shape, which is obtained by injection molding technology. After vacuum aluminum coating, high reflectivity can be achieved. Diffraction (diffusion) reflectance is reduced, and light and dark reflections obtain contrast, that is, brightness contrast; due to the release of the mas...

Claims

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Application Information

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IPC IPC(8): G11B7/24006G11B7/26
Inventor 张水涛罗文辉
Owner 广东省宝月矿山机械厂
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