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Information recording method, information recording medium, and information recording apparatus

A technology for information recording and recording media, applied in optical recording/reproducing/erasing methods, optical recording heads, optical recording systems, etc., and can solve problems such as taking a long time to record

Inactive Publication Date: 2009-01-28
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with these large-capacity information recording media, it takes a long time to record, and therefore, a recording medium capable of high-speed recording is urgently required

Method used

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  • Information recording method, information recording medium, and information recording apparatus
  • Information recording method, information recording medium, and information recording apparatus
  • Information recording method, information recording medium, and information recording apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0159] In Example 1, by using a BD-RE-format polycarbonate disk substrate transcribed with continuous grooves in a spiral shape as the substrate 61, and further continuously forming the reflective layer 65, the second protective layer 64, the phase change layer thereon, The recording layer 63, the first protective layer 62, and the cover layer 66, and further performed an initial crystallization process for causing crystallization in the recording layer, the inventors of the present invention fabricated a specimen of the information recording medium 60.

[0160] For the reflective layer 65, an Ag-0.5 wt% Bi alloy layer with a thickness of 140 nm was used. For the second protective layer 64, ZnO-2wt%Al with a thickness of 8nm is used 2 o 3 layer. For the phase-change recording layer 63, In 18 Sb 77 Zn (atomic percent) layer. For the first protective layer 62, ZnS-20mol% SiO was formed with a thickness of 33nm 2 layer. Formation of the thin film was performed by using a c...

example 2

[0178] Using Example 2, an evaluation similar to that of Example 1 was performed on the same media used in Example 1, while using the parameters of the recording strategy as shown in Table 2 below.

[0179] Table 2

[0180] parameters

current mark

When considering intersymbol interference

empty area

value

Tmp

Mark length = 6T-9T

1.00

STtop

Mark length ≥ 4T

1.00

Mark length = 3T

0.725

Mark length = 2T

Pre-empty area length ≥ 5T

0.950

↑

Pre-empty area length = 4T

0.950

↑

Pre-empty area length = 3T

0.975

↑

Pre-empty area length = 2T

0.975

eTtop

Mark length = 5T, 7T, 9T

-

2.10

Mark length = 4T, 6T, 8T

-

2.00

Mark length = 3T

-

2.50

Mark length = 2T

Back space length ≥ 5T

1.65

↑

Back space length = 4T

1.70

↑ ...

example 3

[0186] Using Example 3, an evaluation experiment similar to the case of Example 1 was performed on the same medium as used in Example 1, while using the parameters of the recording strategy as shown in Table 3 below.

[0187] table 3

[0188] parameters

current mark

When considering intersymbol interference

empty area

value

Tmp

Mark length = 6T-9T

-

1.00

sTtop

Mark length ≥ 4T

-

1.00

Mark length = 3T

Pre-empty area length ≥ 5T

0.725

↑

Pre-empty area length = 4T

0.725

↑

Pre-empty area length = 3T

0.725

↑

Pre-empty area length = 2T

0.875

Mark length = 2T

Pre-empty area length ≥ 5T

0.950

↑

Pre-empty area length = 4T

0.950

↑

Pre-empty area length = 3T

0.975

[0189] ↑

Pre-empty area length = 2T

0.975

eTtop

Mark length = 5T, 7...

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Abstract

An information recording method recording information on an information recording medium in the form of a recording mark having a time-length nT by irradiating optical beam pulses thereto according to a recording strategy, the recording strategy comprises the steps of forming the recording mark on the recording medium by controlling a power of the optical beam pulses to one of ternary values Pw, Pb and Pe (Pw>Pe>Pb) and irradiating a heating pulse having a power set to Pw, and a cooling pulse having a power set to Pb, upon the information recording medium alternately; and forming a space on the recording medium subsequent to the recording mark by irradiating the optical beam pulse with the power Pe, the recording strategy increasing the number of said heating pulses by one each time the time-length of the recording mark is increased by 2T, the recording strategy setting a heat pulse starting time sTtop and a heat pulse termination time eTtop for a first heating pulse, when forming a recording mark of a time-length of at least 2T, individually at least in the case of forming a space-length of 2T and the case in which there is formed a space-length of 3T or more, before or after the currently formed recording mark.

Description

technical field [0001] The present invention generally relates to information recording technology, and more particularly, to a large-capacity information recording medium for recording, an information recording method and an information recording apparatus suitable for using such a large-capacity information recording medium. Background technique [0002] With the advancement of digital information processing technology and multimedia technology, there is a need for a system capable of recording and reproducing information with increased storage capacity and improved speed while maintaining accuracy with respect to conventional playback-only recording media (playback-only recording media) such as DVD- ROM or CD-ROM copy compatibility. In particular, recordable optical discs of DVD-R, DVD-RW, DVD+R, DVD+RW, CD-R, CD-RW, etc. have wide versatility and are easy to use, and the demand thereof is expanding. [0003] Recently, in order to obtain further increased storage capacit...

Claims

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Application Information

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IPC IPC(8): G11B7/0045G11B7/125G11B7/006G11B20/10
Inventor 日比野荣子金子裕治郎大仓浩子
Owner RICOH KK
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