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Method and device for recording marks in recording layer of an optical storage medium

A technology for storage media and recording layers, applied in optical recording/reproducing/erasing methods, optical recording heads, optical recording systems, etc., can solve the problems of sensitivity to radiation beam power fluctuations, difficult mark length control, etc., and achieve long cooling cycles Effect

Inactive Publication Date: 2005-06-22
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this method is sensitive to power fluctuations of the radiation beam and has relatively difficult control of mark length

Method used

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  • Method and device for recording marks in recording layer of an optical storage medium
  • Method and device for recording marks in recording layer of an optical storage medium
  • Method and device for recording marks in recording layer of an optical storage medium

Examples

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Embodiment Construction

[0035] exist figure 1 An example of a write strategy for DVD+RW and CD-RW is shown in . According to the DVD+RW and CD-RW standards, the different possible power levels and durations described in this figure are possible. According to this method, a schematically shown top view with 6*T w Time-length marks 1 are recorded on a recording layer of a storage medium, the storage medium mentioned here is an optical storage medium. T w Indicates the length of one cycle of the reference clock. The 6*T is written by a pulse train w Marked, the pulse train consists of a first pulse 2 followed by 4 multiple pulses 3 . According to the invention, the multi-pulse 3 has a pulse duration T mp w firgt ≥T mp .

[0036] The following drawings are about the optical recording medium sample nr.725 ( Figure 2-4 ), 828( Figure 5 ) and 210 ( Figure 8 ) to record. These media basically have Figure 8 The design described in the description. through the Figure 9 The semiconductor las...

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Abstract

The invention relates to a method and a recording device for recording marks (1) on a phase change type storage medium. Usually, an nT mark (1) is recorded by a sequence of n-1 or less write pulses. In slow cooling stacks, this will result in low quality markings. The invention proposes to increase the cooling period between multiple pulses (3) in the write pulse train by applying multiple pulses (3) with pulse duration Tmp<4ns and duty cycle Tmp / Tw, Where Tw is the reference clock cycle time and Tw<40ns. In this way, marks of very good quality are obtained even after a huge number of direct overwrite (DOW) cycles and over a wide range of recording power and recording speed (1).

Description

technical field [0001] The invention relates to recording in a storage medium having a time length n*T by irradiating the recording layer with a pulsed radiation beam w The method of marking, n represents an integer greater than 1, and Tw represents the length of one cycle of the reference clock, the storage medium includes a recording layer with a phase-reversible material, which is switchable between a crystalline phase and an amorphous phase , each mark is written by a pulse sequence comprising a first pulse followed by m multiple pulses, where m represents an integer greater than or equal to 1 and less than or equal to n−1. [0002] The invention also relates to a recording device for recording marks on an optical storage medium, capable of carrying out the method described above, said storage medium comprising a recording layer with a phase-reversible material between a crystalline phase and an amorphous phase Convertible. Background technique [0003] A recording lay...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0045G11B7/006G11B7/125
CPCG11B7/006G11B7/0045
Inventor J·C·N·里佩斯B·A·J·贾科布斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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