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Method for improving optical recording media reading signal stability

An optical recording medium, a stable technology, applied in optical recording/reproduction/erasing methods, optical recording systems, recording/reproduction with optical methods, etc., can solve problems such as data loss, recording mark changes, etc., and achieve excellent signals The effect of reading stability

Inactive Publication Date: 2008-08-20
FORTUNE JIANGSU MULTIMEDIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the aforementioned patent does not mention its impact on the stability of data reading. Sometimes even if the recording medium can have good recording characteristics (such as low jitter value) when the signal is written for the first time, the disc film structure and If the recording parameters are not properly designed, the disc will easily accumulate heat in the recording layer after reading data repeatedly, which will cause changes in the recording marks and further lead to the loss of recorded data.

Method used

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  • Method for improving optical recording media reading signal stability
  • Method for improving optical recording media reading signal stability
  • Method for improving optical recording media reading signal stability

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A Blue-ray Disc-RE substrate (1) with grooves and lands is prepared. The track pitch is 74 μm and the thickness is 1.1 mm. Plating a silver (Ag) reflective layer (2) with a thickness of 100nm on the substrate by magnetron sputtering, and then plating a silicon nitride (SiN) first interface layer (3) with a thickness of 8nm on the reflective layer , and then plate zinc sulfide-silicon oxide (ZnS-SiO) with a thickness of 8nm on the first interface layer 2) the first protective layer (4), and then respectively form a recording layer (5) with a thickness of 11nm on the protective layer, and then plate zinc sulfide-silicon oxide (ZnS-SiO2) with a thickness of 19nm on the recording layer. 2 ) the second protective layer (6), and a second interface layer (7) of silicon nitride (SiN) with a thickness of 30nm is plated on the second protective layer, the film structure diagram is as follows figure 1 shown. Finally, a light-transmitting film (8) with a thickness of 0.1 mm was s...

Embodiment 2

[0042] Prepare a blue-ray disc-recordable disc (Blue-ray Disc-RE) substrate with grooves and lands, the track pitch is 74 μm, and the thickness is 1.1 mm. A silver (Ag) reflective layer with a thickness of 100nm is plated on the substrate by magnetron sputtering, and then a first interface layer of silicon nitride (SiN) with a thickness of 8nm is plated on the reflective layer, and then the first interface layer is coated on the first The interface layer is plated with zinc sulfide silicon oxide (ZnS-SiO) with a thickness of 8nm 2 ) the first protective layer, and then form a recording layer with a thickness of 13nm on the protective layer, and then plate zinc sulfide-silicon oxide (ZnS-SiO2) with a thickness of 19nm on the recording layer 2 ) a second protective layer, and a second interface layer of silicon nitride (SiN) with a thickness of 30 nm is plated on the second protective layer. Finally, a light-transmitting film with a thickness of 0.1 mm was spin-coated on the pr...

Embodiment 3

[0044] Example 3:

[0045] Prepare a blue-ray disc-recordable disc (Blue-ray Disc-RE) substrate with grooves and lands, the track pitch is 74 μm, and the thickness is 1.1 mm. A silver (Ag) reflective layer with a thickness of 100nm is plated on the substrate by magnetron sputtering, and then a first interface layer of silicon nitride (SiN) with a thickness of 8nm is plated on the reflective layer, and then the first interface layer is coated on the first The interface layer is plated with zinc sulfide-silicon oxide (ZnS-SiO) with a thickness of 8nm 2 ) the first protective layer, and then form a recording layer with a thickness of 15nm on the protective layer, and then plate zinc sulfide silicon oxide (ZnS-SiO 2 ) a second protective layer, and a second interface layer of silicon nitride (SiN) with a thickness of 30 nm is plated on the second protective layer. Finally, a light-transmitting film with a thickness of 0.1 mm was spin-coated on the protective layer as the light-t...

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Abstract

The invention discloses a method for improving the stability of optical recording media reading signals, comprising the steps of: adjusting the absorptivity of an optical recoding media by changing the thickness of the optical recording media, namely improving the absorptivity of the optical recoding media by increasing the thickness of the optical recording media; and lowering the ratio of erasing power to writing power. According to the method, the disc absorptivity is controlled by adjusting the recording media thickness, and matched with the ratio of writing power (Pw) to erasing power (Pe) of the recording laser, so that a laser irradiating power most appropriate for changing specific recording film optical property is got. With the initial writing signal jitter value not being changed greatly, as the recording layer thickness increases appropriately, when the absorptivity corresponds to specific absorptivity scope and matches well with the low ratio of erasing power (Pe) and writing power (Pw), superior signal reading stability can be achieved under high-speed recording.

Description

Technical field: [0001] The invention relates to a method for improving the stability of reading signals from an optical recording medium. Background technique: [0002] Optical information storage is to use laser light technology to record data in optical recording media. The principle is to use focused laser light to change the structure of the optical disc recording layer material, so that the reflectivity is significantly different when reading due to structural differences. , as the recording and reading of 0 and 1 signals. The types of optical recording media include read-only optical discs, write-once optical discs, and rewritable optical discs. The rewritable optical discs use phase-change recording layer materials to produce crystalline or amorphous phases under different intensities of laser light. structure, through the reversible phase transition between the crystalline phase and the amorphous phase to achieve the function of repeated reading and writing of data...

Claims

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Application Information

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IPC IPC(8): G11B7/242G11B7/253G11B7/254G11B7/0045G11B7/2433G11B7/2534
Inventor 唐维泰邓衔翔王勇
Owner FORTUNE JIANGSU MULTIMEDIA
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