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Process preparing red dye film of writable high-density digital optical disc

A technology of digital discs and dye films, applied in the manufacture of optical record carriers, optical record carriers, coatings, etc.

Inactive Publication Date: 2004-04-21
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dye film is the recording layer of DVD-R, so the preparation of dye film is the key technology of DVD-R manufacturing. The quality of dye film layer directly affects the realization and evaluation of material performance, and determines the final performance of the disc. DVD-R dye film layer In the prior art, the centrifugal spinning wet coating method was adopted, but due to the small track pitch (0.74 μm) of the DVD-R disk base and the pits with pre-engraved time codes, the uniformity of the film layer and the platform and groove film The layer thickness difference has higher requirements, the original CD-R wet coating technology can no longer be applied to DVD-R

Method used

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  • Process preparing red dye film of writable high-density digital optical disc
  • Process preparing red dye film of writable high-density digital optical disc
  • Process preparing red dye film of writable high-density digital optical disc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 150mg of the above-mentioned azo dye and add it to 10ml tetrafluoropropanol;

[0019] Dissolve the above solution in an ultrasonic tank for 2 hours with ultrasonic vibration, then filter it with microfilters with a pore size of 0.5 μm and 0.2 μm, and transfer the filtered solution to a storage bottle;

[0020] The length of the first area 1 of the feeding hand movement in the spin coating equipment is 5mm, and the acceleration is 100mm / s 2 ;The length of the second zone 2 is 10mm, and the acceleration is 80mm / s 2 ; Feed amount 0.2ml; feed speed 200 rpm, glue equalization speed 1000 rpm, time 4s, drying speed 3500 rpm, time 2s. The uniformity of the dye film was 0.83%.

Embodiment 2

[0022] Weigh 200mg of the above-mentioned azo dye and add it to 10ml tetrafluoropropanol;

[0023] Same as above;

[0024] The length of the first area 1 of the feeding hand movement in the spin coating equipment is 10mm, and the acceleration is 150mm / s 2 ;The length of the second zone 2 is 15mm, and the acceleration is 100mm / s 2 ; Feed amount 0.2ml; feed speed 200 rpm, glue equalization speed 1000 rpm, time 4s, drying speed 3500 rpm, time 2s. The uniformity of the dye film was 0.91%.

Embodiment 3

[0026] Weigh 300mg of the above-mentioned azo dye and add it to 10ml tetrafluoropropanol;

[0027] Same as above;

[0028] The length of the first area 1 of the feeding hand movement in the spin coating equipment is 10mm, and the acceleration is 200mm / s 2 ;The length of the second zone 2 is 15mm, and the acceleration is 120mm / s 2 ; Feed amount 0.2ml; feed speed 200 rpm, glue equalization speed 1000 rpm, time 4s, drying speed 3500 rpm, time 2s. The uniformity of the dye film was 0.97%.

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Abstract

A process for preparing the red-light dye film used for writable high-density digital optical disc is disclosed. Its dye is the heterocyclic monoaczo-nickel chelate, which is prepared through diazotizing 2-aminothiazole and coupling with 3-bipropylamino phenol. The feeding arm of the filming apparatus is driven by the step motor controlled by single-chip microcomputer for regulating its rotation speed. The process for rotation coating on disc is composed of feeding, homogenizing and drying. Its advantage is high uniformity (less than 1%).

Description

Technical field: [0001] The invention belongs to a preparation method of a high-density recordable digital disc red light dye film, in particular to a spin-coating preparation method of a recording material high-uniformity film suitable for a red light band (630-650nm) recordable digital multipurpose disc. Background technique: [0002] The main direction of research and development of optical disk storage technology is to continuously improve storage density and transmission rate. The current product has developed to the second generation of DVD (Digital VideoDisk) series with a single-sided capacity of 4.7GB as the mainstream. DVD shortens the laser wavelength (from 0.78μm to 0.65μm), increased the numerical aperture (NA from 0.45 to 0.6), reduced the servo groove pitch (from 1.60μm to 0.74μm), and increased the storage capacity of the 5-inch disc from 650MB to 4.7GB ( single sided single layer). DVD discs are divided into read-only (ROM, Video) and recordable. , DVD+RW)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12G11B7/26
Inventor 耿永友顾冬红干福熹
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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