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Information recording medium, manufacturing method thereof and information recording regenerating system

A technology for information recording and manufacturing methods, applied in optical recording/reproducing/erasing methods, optical reproduction systems, information arrangement, etc., and can solve problems such as crosstalk

Inactive Publication Date: 2008-01-09
HITACHT MAXELL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize such an appendable or rewritable HD DVD, it is necessary to solve various problems such as methodological problems and problems (problems such as crosstalk) accompanying narrower tracks.

Method used

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  • Information recording medium, manufacturing method thereof and information recording regenerating system
  • Information recording medium, manufacturing method thereof and information recording regenerating system
  • Information recording medium, manufacturing method thereof and information recording regenerating system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Coat the i-line photoresist with a thickness of 30nm on the glass original disk, and after baking at 80°C for 30 minutes, use the original disk exposure device with a wavelength of 351nm, and control it by CLV rotation at a line speed of 3.3m / s Make an exposure. In addition, the master exposure device optimizes the accuracy of CLV rotation control at a linear velocity of 3.3m / s, and at any radial position of HD DVD, the ideal CLV rotation control with no error is performed to make three consecutive tracks The relative error between the adjustments within 0.40μm. Since the jitter period is 9 μm, by suppressing the rotation control error within 0.40 μm, in the range of 3 consecutive tracks, the rotation control accuracy becomes within 4% of the jitter period relative to the ideal CLV control, which can satisfy (2πP / T-0.05)×2πrad.≤|Δ1|+|Δ2|≤(1+2πP / T+0.05)×2πrad.

[0041] Exposure conditions were track pitch 400nm, linear velocity 3.3m / s, wobble period 9μm, jitter amplit...

Embodiment 2

[0046] The same glass master with photoresist as in Example 1 was prepared, and exposure was performed at a linear velocity of 3.8 m / s by CLV rotation control using a master exposure device with a wavelength of 351 nm. In addition, the original disk exposure device keeps the linear velocity at 3.3m / s so that the precision of CLV rotation control is the best. The measurement result is: at any radial position of HD DVD at a linear velocity of 3.8m / s, Compared with the ideal CLV rotation control without error, the relative error between three consecutive tracks is kept within 0.45 μm. Since the jitter period is 9 μm, by suppressing the rotation control error within 0.45 μm, in the range of 3 consecutive orbits, the rotation control accuracy is within 5% of the jitter period compared to the ideal CLV control, which can satisfy (2πP / T-0.05)×2πrad.≤|Δ1|+|Δ2|≤(1+2πP / T+0.05)×2πrad.

[0047] Then, when an information recording medium for evaluation of jitter amplitude change is manuf...

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Abstract

The invention provides an information recording medium with less amplitude variation of dither signal induced by crosstalk, in added type or a rewritten type medium with narrow track-ization of track. A recording track winding by predetermined wobble-periods T is formed in spiral shape by the track pitch P, and main area of said wobble is formed, and the added type or a rewritten type information-recording-medium of the other area is formed in other phase, the wobble phase is relative to the said main area in arbitrary tracks, and the phase offset of the wobble of said main area of a track of adjoining one side is set as delta 1 and the phase offset of the wobble of said main area of a track of adjoining another side is set as delta 2, the ldelta1 l+ldelta2l. is controlled in the range of x2pirad.<=ldelta1 l+ldelta2l.<=(1+2piP / T+0.05) x2pirad.

Description

technical field [0001] The present invention relates to an information recording medium and a manufacturing method thereof, an information recording and reproducing device, and a phase adjustment method of a recording track, in particular to an information recording medium capable of high-density recording with wobble grooves, an information recording and reproducing system, and a phase adjustment method of a recording track . Background technique [0002] In the field of optical discs, which are one of the information recording media, ROMs such as CDs and DVDs that record large-capacity information can be copied cheaply only by duplicating the prepit formed in advance on the master disc during the forming process. The medium has gained widespread popularity. In addition, add-on media such as CD-R and DVD-R, and rewritable media such as CD-RW and DVD-RW, which are playback-compatible with ROM media, are also widely used. [0003] However, in the technical field of informat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007G11B7/24082
CPCG11B7/0053
Inventor 杉山寿纪近禅太田宽纪
Owner HITACHT MAXELL LTD
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