CN1221952C - 光信息记录媒体、使用该媒体的信息记录方法及装置 - Google Patents

光信息记录媒体、使用该媒体的信息记录方法及装置 Download PDF

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CN1221952C
CN1221952C CNB021062501A CN02106250A CN1221952C CN 1221952 C CN1221952 C CN 1221952C CN B021062501 A CNB021062501 A CN B021062501A CN 02106250 A CN02106250 A CN 02106250A CN 1221952 C CN1221952 C CN 1221952C
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information recording
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optical information
pulse
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CN1381836A (zh
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鸣海慎也
山田胜幸
伊藤和典
让原肇
小名木伸晃
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Ricoh Co Ltd
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    • G11B7/004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
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Abstract

本发明涉及光信息记录方法、装置及媒体。信息记录方法使用功率电平为Pe的连续激光记录或重写信号宽度为nT的0信号,使用光脉冲列记录或重写信号宽度为nT的1信号,光脉冲列构成为:初始脉冲部分fp,功率电平Pw,脉冲宽度xT;多脉冲部分mp,包括高电平脉冲及低电平脉冲(如果n-n′>1),高电平脉冲为(n-n′)次,功率电平Pw′,脉冲宽度yT,低电平脉冲位于两个高电平脉冲间,功率电平Pb,脉冲宽度(1-y)T;端脉冲部分ep,功率电平Pb’,脉冲宽度zT;T为时标周期,n及n′为正整数,n′<n,功率电平满足下式:Pw或Pw′>Pe>Pb或Pb′。至少x、y、z之一处于下列范围:0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70。

Description

光信息记录媒体、使用该媒 体的信息记录方法及装置
技术领域
本发明涉及光信息记录媒体,更具体地说,涉及相变化型光信息记录媒体,通过以激光束照射记录媒体的记录层,使得记录层材料的光特性产生变化,进行信息的记录、再生、重写。本发明还涉及使用该光信息记录媒体的信息记录方法及其装置。
背景技术
通过照射激光进行记录、再生的各种光信息记录媒体以得到开发并被使用。作为这种光信息记录媒体具体例包括仅能记录一次的CD-Rs、DVD-Rs以及可重复记录的CD-RWs、DVD-RWs、DVD-RAMs、MDs、MO盘等。这些光信息记录媒体可移动,因此,需求日益增加。
这些光信息记录媒体之中,CD-RWs、DVD-RWs、DVD-RAMs等使用相变化型材料作为媒体的记录层,即利用结晶—非结晶相间或结晶—结晶相间的相变化。尤其,如MDs、MO盘等光磁存储器具有容易通过单一光束进行重写,且用于使信息在光磁存储器记录或再生的记录/再生装置侧的光学系统也简单的优点。所以,这些光信息记录媒体的需求日益增加。
一般,信息记录在相变化型信息记录媒体上时,使用使激光的功率电平按三阶段调制的脉冲方式(strategy)进行记录或重写。当多速记录或等角速(Constant Angular Velocity,以下简记为CAV)记录那样,在记录媒体上使用上述脉冲方式以不同线速度进行记录场合,在高线速范围将记录媒体的记录层加热到一预定温度所需要的能量比低线速范围时大,因此,在高线速范围的记录条件与低线速范围不同。为此,希望在高线速记录时增加记录功率,和/或在高线速记录时延长在mp部的具有功率电平pw的高电平脉冲的动作时间,即使记录速度变化,也能合适地在记录媒体上进行记录,即,在记录媒体上记录具有良好特性的信息。
在这种情况下,合适的记录条件因用作记录媒体的材料、结构等而变化。因此,采用下列方法:在例如CD-RWs中,在记录媒体中预先输入相对1X(即1.2m/s)、4X(4.8m/s)、10X(12m/s)各线速度,记录媒体的合适的记录条件的信息,记录装置可利用这些信息合适地设定记录条件。
但是,使用这种方法时,需要先对于各记录线速度预先决定最适记录功率和/或最适记录脉冲方式,然后,分别对各线速度设定记录条件。因此,在CAV记录等场合,由于记录点沿记录媒体的直径方向移动,记录线速度连续变化,设定合适条件非常困难。因而,希望能有在这种条件下也能以良好特性记录信息的记录方法。或者希望能有不受记录线速度影响能以良好特性记录信息的光信息记录媒体。
发明内容
本发明就是为解决上述先有技术所存在的问题而提出来的,本发明的目的在于,提供即使在多速记录或CAV记录等通过不同线速度进行记录时也能以良好的信号特性进行记录的相变化型光信息记录媒体。
本发明的另一目的在于,提供即使记录速度变化也能以良好的信号特性将信息记录在光信息记录媒体上的信息记录方法及其装置。
为了实现上述目的,本发明提出一种光信息记录方法,包括以下步骤:
用激光束照射光信息记录媒体的相变化型记录层,以便在相变化型记录层用标记边缘记录方法记录或重写信息;
光信息记录媒体包括至少设有同心槽和螺旋槽之一的透明基板,相变化型记录层设置在上述透明基板上;其特征在于:
使用功率电平为Pe的连续激光记录或重写信号宽度为nT的0信号,使用光脉冲列记录或重写信号宽度为nT的1信号,该光脉冲列由以下构成:初始脉冲部分fp,其具有功率电平Pw,脉冲宽度xT;多脉冲部分mp,其包括复数高电平脉冲以及低电平脉冲(如果n-n’>1),上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于两个高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;端脉冲部分ep,其具有功率电平Pb’,脉冲宽度zT;其中,上述T为时标周期,n及n’为正整数,并且,n’<n,上述功率电平满足下列关系:
Pw或Pw’>Pe>Pb或Pb’
至少x、y、z之一处于下列范围:
0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70。
根据本发明的光信息记录方法,其特征还在于,光信息记录媒体以Vm/s~3Vm/s记录线速度范围实行上述照射步骤,上述V为3~13。这样,Vm/s~3Vm/s即为从3~9m/s到13~39m/s,若超过13~39m/s,不能追随导向槽照射激光。
根据本发明的光信息记录方法,其特征还在于,上述同心槽和/或螺旋槽沿光信息记录媒体径向摆动,摆动周期为4.0μm~4.6μm
根据本发明的光信息记录方法,其特征还在于,进一步包括读取存储在上述光信息记录媒体中的信息,以将x,y,z中至少一个固定为处于上述范围中的一特定值。
根据本发明的光信息记录方法,其特征还在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
为了实现上述目的,本发明提出一种光信息记录装置,包括:
盘驱动器,用于驱动光信息记录媒体回转;
激光驱动电路,发出激光脉冲;
拾波器,用激光驱动电路发出的激光脉冲照射光信息记录媒体,使用标记边缘方法将信息记录或重写在光信息记录媒体上;其特征在于:
使用功率电平为Pe的连续激光记录或重写信号宽度为nT的0信号,使用光脉冲列记录或重写信号宽度为nT的1信号,该光脉冲列由以下构成:初始脉冲部分fp,其具有功率电平Pw,脉冲宽度xT;多脉冲部分mp,其包括复数高电平脉冲以及低电平脉冲(如果n-n’>1),上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于两个高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;端脉冲部分ep,其具有功率电平Pb’,脉冲宽度zT;其中,上述T为时标周期,n及n’为正整数,并且,n’<n,上述功率电平满足下列关系:
Pw或Pw’>Pe>Pb或Pb’
至少x、y、z之一处于下列范围:
0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70。
根据本发明的光信息记录装置,其特征还在于,当上述盘驱动器驱动光信息记录媒体以Vm/s~3Vm/s记录线速度范围回转时,上述激光驱动电路发出的激光脉冲照射光信息记录媒体,上述V为3~13。
根据本发明的光信息记录装置,其特征还在于,上述光信息记录媒体设有同心槽和螺旋槽中至少一种,上述同心槽和/或螺旋槽沿光信息记录媒体径向摆动,摆动周期为4.0μm~4.6μm,上述激光驱动电路沿上述同心槽和/或螺旋槽用激光脉冲照射光信息记录媒体。
根据本发明的光信息记录装置,其特征还在于,当x,y,z中至少一个在上述范围固定为一特定值时,1信号被记录或重写。
根据本发明的光信息记录装置,其特征还在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行0信号和1信号的记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
为了实现上述目的,本发明提出一种光信息记录媒体,包括:
一单板盘,该单板盘设有透明基板、设于透明基板表面上的下保护层、设于上述下保护层之上的相变化型记录层、设于上述记录层之上的上保护层、设于上述上保护层之上的反射层以及设于上述反射层之上的外敷层;其特征在于:
上述光信息记录媒体储存信息,具有信号宽度为nT的0信号以及信号宽度为nT的1信号被记录或重写在相变化记录层,使用功率电平为Pe的连续激光记录或重写上述0信号,使用光脉冲列记录或重写上述1信号,该光脉冲列由以下构成:初始脉冲部分fp,其具有功率电平Pw,脉冲宽度xT;多脉冲部分mp,其包括复数高电平脉冲以及低电平脉冲(如果n-n’>1),上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于两个高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;端脉冲部分ep,其具有功率电平Pb’,脉冲宽度zT;其中,上述T为时标周期,n及n’为正整数,并且,n’<n,上述功率电平满足下列关系:
Pw或Pw’>Pe>Pb或Pb’
至少x、y、z之一处于下列范围:
0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70
当使用储存在上述光信息记录媒体中的信息,将x,y,z中至少一个在上述范围固定为一特定值时,1信号被记录或重写。
根据本发明的光信息记录媒体,其特征还在于,光信息记录媒体储存信息,当使用该储存在上述光信息记录媒体中的信息,将x,y,z中至少一个在上述范围固定为一特定值时,1信号被记录或重写。
根据本发明的光信息记录媒体,其特征还在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行0信号和1信号的记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
根据本发明的光信息记录媒体,其特征还在于,上述光信息记录媒体设有同心槽和螺旋槽中至少一种,上述同心槽和/或螺旋槽沿光信息记录媒体径向摆动,摆动周期为4.0μm~4.6μm。
下面说明本发明的效果。
按照本发明的光信息记录方法,信息通过PWM方式记录或重写在光信息记录媒体上,通过对记录脉冲的fp,mp,ep的至少之一宽度进行特定,即使在多速记录或CAV记录中,即当记录以不同线速度实行时,也能以良好的信号特性进行记录。因此,能提高再生互换性,即再生信息可以通过如DVD-ROM驱动器那样的再生专用装置进行再生。
即使记录线速度变动场合,通过固定至少一个记录脉冲宽度(即x,y,z),能简便地设定脉冲方式。
通过控制脉冲功率电平(即Pw,Pw’,Pe,Pb,Pb’),能以良好的信号特性进行记录,因此,能提高再生互换性。
按照本发明的光信息记录装置,使用上述信息记录方法将信息记录或重写在相变化型光信息记录媒体上,因此,光信息记录装置具有良好的再生互换性。
按照本发明的光信息记录媒体,具有良好的信号再生性以及良好的保存可靠性,因此,即使记录信息保存了较长时间,记录信息仍可以通过再生专用装置进行再生,即记录媒体通过再生专用装置具有良好的再生互换性。
附图说明
图1是说明激光照射在本发明的相变化型光信息记录媒体上用以记录或重写信息的概略图;
图2是表示本发明的光信息记录装置实施例的主要部分的概略图;
图3为表示初始脉冲部分fp的脉冲宽度与再生信号的不稳定性σ/T之间关系的图线;
图4为多脉冲部分mp的脉冲宽度与再生信号的不稳定性σ/T之间关系的图线;
图5为端脉冲部分ep的脉冲宽度与再生信号的不稳定性σ/T之间关系的图线;
图6为表示本发明的光信息记录媒体实施例的横截面的概略图。
具体实施方式
下面参照附图,详细说明本发明较佳实施例,通过下面描述,本夹明的目的、特征及优点将会更清楚。
先详细说明在本发明的相变化型光信息记录媒体上记录和再生信息的方法。
图2是表示本发明的光信息记录装置实施例的主要部分的概略图。如图2所示,光信息记录媒体11可由盘驱动部12驱动旋转,该盘驱动部包括一心轴马达。激光二极管由激光驱动电路14驱动,发出激光。所发出的激光由记录/再生用拾波器13通过一光学系统发出。激光驱动电路14将激光控制为如图1所示那样的具有fp、mp、ep部分的激光形态发出。用激光照射光信息记录媒体的记录层,以使记录层发生相变化。接着,信息被记录。该信息可以通过用激光照射记录媒体,在拾波器接受来自光信息记录媒体的反射光而再生。
在本发明中,实现信息记录使用所谓PWM记录方式(即标记边缘记录),通过改变记录标记的宽度,将信号记录在记录层。使用调制部的时标,用例如适于CD-RW的EFM(Eight-to-FourteenModulation)方式或者其改良方式对需记录信号进行调制记录。
通过上述PWM记录方式进行记录时,调制后具有信号宽nT的0信号使用具有Pe功率电平的连续光被记录或重写,其中,n为所定值,T为时标周期,即与用于信号调制的时标周期相当的时间。调制后具有信号宽nT的1信号使用记录光的脉冲列被记录或重写,该记录光脉冲列由以下构成:初始脉冲部分fp,其具有功率电平Pw,脉冲宽度xT;多脉冲部分mp,其包括高电平脉冲以及低电平脉冲(如果n-n’>1),上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;  端脉冲部分ep,其具有功率电平Pb’,脉冲宽度zT;上述n及n’设为正整数,并且n’<n,上述功率电平具有如下关系:
(Pw或Pw’)>Pe>(Pb或Pb’)。
在图1所示实施例中,n为4,n’为2。
使用本发明的向记录媒体进行记录的方法,以记录线速度Vm/s进行记录时,记录后的再生信号的不稳定特性σ/T成为9%以下,能充分确保在再生专用装置再生互换性的x、y、z的范围分别为:
0.25<x≤0.8(参照图3)
0.25≤y≤0.55(参照图4)
0.35≤z≤1.3(参照图5)
以记录线速度3Vm/s进行记录时,记录后的再生信号的不稳定特性σ/T成为9%以下的x、y、z的范围分别为:
0.35≤x≤0.75(参照图3)
0.30≤y≤0.60(参照图4)
0.10≤z≤0.70(参照图5)
在上述范围内,能充分确保在再生专用装置的再生互换性,还能确保调制度0.55以上,反射率在16%以上。
因此,在Vm/s与3Vm/s中某线速度记录场合,符合再生信号的不稳定特性处于9%以下,调制度0.55以上,反射率16%以上的x、y、z的范围分别为:
0.35≤x≤0.75(参照图3)
0.30≤y≤0.55(参照图4)
0.35≤z≤0.70(参照图5)
即,即使以Vm/s~3Vm/s范围内任意记录线速度在记录媒体上记录信息场合,如果满足上述条件,记录媒体就具有良好的再生互换性(即记录信息能通过再生专用装置良好地得到再生)。
下面说明本发明的记录媒体。
图6表示适合使用本发明的记录方法进行记录的光信息记录媒体层结构例。
光信息记录媒体包括透明基板1以及顺序叠置在该透明基板1一侧的下保护层2,记录层3,上保护层4,反射层5,外敷层6。上述透明基板1设有螺旋状导向槽,其沿记录媒体径向作周期性摆动。还可以在上述外敷层6上形成印刷层8,在透明基板1的另一侧形成硬敷层7。另外,可以将上述透明基板1,下保护层2,记录层3,上保护层4,反射层5及外敷层6,再加上任选的印刷层8和硬敷层7形成单板盘10。
再有,可以通过粘结层9将第二透明基板1’形成在印刷层8上。该第二透明基板1’也可用第二单板盘10’代替。在这种情况下,也可以在单板盘10上先不形成印刷层8,待通过粘结层9将单板盘10与第二透明基板1’或第二单板盘10’粘结后,在上述第二透明基板1’或第二单板盘10’上形成第二印刷层8’。
用于作为透明基板1和1’的材料通常为玻璃,陶瓷,树脂。从成形性及成本方面考虑,最好为树脂基板。用于作为透明基板1和1’的树脂例可以列举聚碳酸酯,丙烯酸树脂,环氧树脂,聚苯乙烯,丙烯腈-苯乙烯共聚物树脂,聚乙烯,聚丙烯,硅系树脂,氟系树脂,ABS树脂,聚氨酯树脂等。从成形性、光学特性及成本方面考虑,最好为聚碳酸酯或丙烯酸系树脂。
适合用于作为相变化型记录层的材料为包含Sb、Te的相变化型光记录材料,能发生结晶-非结晶相间的相变化,各自处于稳定化或准稳定化状态。这是由于这些材料具有良好的记录灵敏度(即在高速场合能从结晶状态变化为非结晶状态),良好的消去灵敏度(即在高速场合能从非结晶状态变化为结晶状态),以及良好的消去比。
通过在上述SbTe记录材料中添加一种或多种元素,如Ga,Ge,Ag,In,Bi,C,N,O,Si,S等元素,可以改善记录材料的记录灵敏度,消去灵敏度,信号特性及可靠性等。具体地说,最好是在SbTe材料中添加上述一种或多种元素,调整记录材料的组成比,以便信息能在希望的记录速度范围记录在该记录材料上,可以确保记录信号的再生稳定性,并具有长寿命(即良好的可靠性)。
若以记录速度范围3~9m/s在本发明的记录媒体上记录信息场合,至少包含Ag和Ge之一,In和Ga之一,Sb及Te的记录材料很合适。再有,元素构成最好如下:
(Ag/Ge)∶(In/Ga)∶Sb∶Te=α∶β∶γ∶δ
其中,α,β,γ,δ的总和为100(原子%),且α,β,γ,δ具有如下关系:
0<α≤6,2≤β≤8,60≤γ≤72,22≤δ≤27。
这样构成的记录材料可以确保记录信号的再生稳定性,且信号寿命长。
当记录材料的组成超出上述范围场合,当重写记录时,再生信号的不稳定特性超过9%(即再生稳定性劣化),另外,当长期保存时,记录信号可靠性劣化。
记录层的膜厚较好的是10nm~50nm,更好的是12nm~30nm,若考虑初始不稳定特性,重写特性及生产性,最好为14nm~25nm。当记录层过薄时,记录层的光吸收能明显低下,难以起到记录层的作用。与此相反,当记录层过厚时,高速时难以发生均一的相变化。
记录层可以用各种气相成长法,例如真空蒸镀法,溅射法,等离子CVD法,光CVD法,离子镀敷法,电子束蒸镀法等形成。其中,溅射法很合适,这是由于采用该方法生产性好,且记录层膜质良好。
上述记录层被夹于上下保护层之间。适合用于上下保护层的材料包括如SiO,SiO2,ZnO,SnO2,Al2O3,TiO2,In2O3,MgO,ZrO2等金属氧化物,如Si3N4,AlN,TiN,BN,ZrN等氮化物,如ZnS,In2S3,TaS4等硫化物,如SiC,TaC,BC,WC,TiC,ZrC等碳化物,以及金刚石状碳。这些材料既可以单独使用,也可以互相混合使用。再有,也可以含有杂质。另外,上下各保护层可以是单层,也可以是二层或二层以上多层叠置而成。上下保护层的熔点最好应比记录层的熔点高。
这种上下保护层可以通过上述记录层形成方法之一形成。
下保护层的膜厚对所作成的记录媒体的反射率,调制率,记录灵敏度影响很大。为了使记录媒体得到良好的信号特性,该下保护层膜厚最好为60nm~120nm。
上保护层膜厚较好的是5nm~45nm,更好的是7nm~40nm。当该保护层过薄时,难以起到耐热保护层的作用,记录灵敏度低下。与此相反,当该保护层过厚时,易从记录层和/或反射层剥离,反复记录性能低下。
适合用于反射层的材料包括如Al,Au,Ag,Cu,Ta,Ti,W等金属材料,或者包含这些元素的合金。为了提高反射层的耐腐蚀性以及改善热传导率,可以将例如Cr,Ti,Si,Cu,Ag,Pb,Ta中一种或多种金属元素添加到反射层中,添加比率最好为0.3~2原子%。当上述元素添加量过少时,耐腐蚀性效果差。与此相反,当添加量过多时,热传导率上升过量,难以形成非晶状态。
反射层可以通过上述用于形成记录层的气相成长法之一形成。
反射层的膜厚设为50nm~200nm,最好为70nm~160nm。反射层可以为多层结构,这种场合,各层膜厚不能少于10nm,该多层反射层的总膜厚最好为50nm~160nm。
为了防止氧化,在反射层上形成外敷层。一般使用紫外线硬化树脂作为该外敷层,通常采用旋转镀敷法形成上述外敷层。该外敷层的膜厚最好为3μm~15μm。当该外敷层过薄时,当在该外敷层上设有印刷层场合,读取信号时故障率增加,而当该外敷层过厚时,内部应力变大,对盘的机械特性带来很大影响。
一般使用紫外线硬化树脂作为硬敷层,通常采用旋转镀敷法形成上述硬敷层。该硬敷层的膜厚最好为2μm~6μm。当该硬敷层过薄时,不能得到记录媒体(即透明基板)的耐擦伤性。与此相反,当该硬敷层过厚时,内部应力变大,对盘的机械特性带来很大影响。
应在用布擦拭其表面时不损伤该硬敷层,即,当根据JISK5400规定的方法进行硬度测定时,该硬敷层硬度大于或等于铅笔硬度H。另外,在该硬敷层中可以添加导电性材料,以防止硬敷层带电,即防止尘埃等附着到硬敷层上。
设置印刷层是为了提高记录媒体的耐擦伤性,以及用于印刷如商号等特征或图象。形成受纳层作为印刷层,在该受纳层上,通过喷墨记录方法或类似方法形成特征和/或图象。一般通过网板印刷法由紫外线硬化树脂形成印刷层。
该印刷层的膜厚最好为3μm~50μm。当该印刷层过薄时,形成层时发生不匀,而当该印刷层过厚时,内部应力变大,对盘的机械特性带来很大影响。
适合作为粘结层的材料可以包括紫外线硬化树脂,热熔粘结剂,硅树脂等粘结剂等。通常通过例如旋转涂敷,辊涂敷,网板印刷等方法将上述粘结剂材料涂布在外敷层或印刷层上。接着,该粘结层(即组合盘)受到紫外线照射处理,加热处理和/或加压处理,透明基板或单板被粘结。
粘结层9可以涂敷在第二透明基板1’(或第二单板盘10’)和/或单板盘10的印刷层8(或外敷层6)上。
另外,也可以使用粘结纸或粘结片作为粘结层9。
粘结层的膜厚并没有特别限定;但考虑材料的涂布性,硬化性,以及对盘的机械特性的影响,最好为5μm~100μm。
粘结面的范围并没有特别限定,但当粘结层应用于DVD和/或CD能互换的光信息记录媒体场合,为了确保粘结强度,记录媒体的内周端位置应为φ15nm~40nm,最好为φ15nm~30nm。
上面对本发明进行了描述,下面通过实施例进一步具体说明本发明,但实施例仅仅是例示,并不限定本发明。
实施例1
通过射出成形法形成聚碳酸酯基板。该聚碳酸酯基板上设有磁道间距为0.74μm,槽深25nm,槽宽250nm,摆动周期幅4.3μm的螺旋状导向槽。通过溅射法在该聚碳酸酯基板上顺序叠层形成由ZnS·SiO2构成的膜厚为80nm的下保护层,膜厚为15nm的Ag4Ge1In8Sb60Te27系相变化型记录层,由膜厚为15nm的ZnS·SiO2层和膜厚为5nm的SiC层叠层而得的上保护层,以及由Ag构成的膜厚为140nm的反射层。
在反射层上通过旋转镀敷法用紫外线硬化型树脂形成外敷层。于是,作成具有DVD-ROM再生互换性的相变化型光信息记录媒体的单板盘。另一聚碳酸酯基板即第二聚碳酸酯基板通过粘结层被粘结在已作成的单板盘的外敷层上。一印刷层形成在上述第二聚碳酸酯基板的表面(即与粘结层相反侧的表面)。
这样,准备好了叠层盘。
接着,通过使用设有大口径LD(光束径200×1μm)的初始化装置使记录层全面结晶。
对该光信息记录媒体,使用3T~14T的信号,通过8-16调制方式,即信息按DVD-ROM标准进行记录。
按下列条件记录信息:
Pw,Pw’=13.5mW,Pe=7.2mW,Pb或Pb’=0.1mW,x=0.50,y=0.45,z=0.50,记录线速度:3m/s。
再生信号的不稳定特性8.7%,调制度为0.672,反射率为20.2%。
然后,在记录线速度为6m/s下进行记录,再生信号的不稳定特性8.5%,调制度为0.660,反射率为19.6%。
再有,在记录线速度为9m/s下进行记录,再生信号的不稳定特性8.1%,调制度为0.656,反射率为19.5%。
上述特性使用DDU-1000(Pulstec Industrial公司制)进行测定。
当记录在光信息记录媒体上的信息通过DVD-ROM驱动器再生时,能无障害地得到再生。
上面参照附图说明了本发明的实施例,但本发明并不局限于上述实施例。在本发明技术思想范围内可以作种种变更,它们都属于本发明的保护范围。

Claims (15)

1.一种光信息记录方法,包括以下步骤:
用激光束照射光信息记录媒体的相变化型记录层,以便在相变化型记录层用标记边缘记录方法记录或重写信息;
光信息记录媒体包括至少设有同心槽和螺旋槽之一的透明基板,相变化型记录层设置在上述透明基板上;其特征在于:
使用功率电平为Pe的连续激光记录或重写信号宽度为nT的0信号,使用光脉冲列记录或重写信号宽度为nT的1信号,该光脉冲列由以下构成:初始脉冲部分(fp),其具有功率电平Pw,脉冲宽度xT;多脉冲部分(mp),其包括复数高电平脉冲、以及当n-n’>1时的低电平脉冲,上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于两个高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;端脉冲部分(ep),其具有功率电平Pb’,脉冲宽度zT;其中,上述T为时标周期,n及n’为正整数,并且,n’<n,上述功率电平满足下列关系:
Pw或Pw’>Pe>Pb或Pb’
至少x、y、z之一处于下列范围:
0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70。
2.根据权利要求1中所述的光信息记录方法,其特征在于,光信息记录媒体以Vm/s~3Vm/s记录线速度范围实行上述照射步骤,上述V为3~13。
3.根据权利要求1或2中所述的光信息记录方法,其特征在于,上述同心槽和/或螺旋槽沿光信息记录媒体径向摆动,摆动周期为4.0μm~4.6μm
4.根据权利要求1或2中所述的光信息记录方法,其特征在于,进一步包括读取存储在上述光信息记录媒体中的信息,以将x,y,z中至少一个固定为处于上述范围中的一特定值。
5.根据权利要求1或2中所述的光信息记录方法,其特征在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
6.根据权利要求3中所述的光信息记录方法,其特征在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
7.一种光信息记录装置,包括:
盘驱动器,用于驱动光信息记录媒体回转;
激光驱动电路,发出激光脉冲;
拾波器,用激光驱动电路发出的激光脉冲照射光信息记录媒体,使用标记边缘方法将信息记录或重写在光信息记录媒体上;其特征在于:
使用功率电平为Pe的连续激光记录或重写信号宽度为nT的0信号,使用光脉冲列记录或重写信号宽度为nT的1信号,该光脉冲列由以下构成:初始脉冲部分(fp),其具有功率电平Pw,脉冲宽度xT;多脉冲部分(mp),其包括复数高电平脉冲、以及当n-n’>1时的低电平脉冲,上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于两个高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;端脉冲部分(ep),其具有功率电平Pb’,脉冲宽度zT;其中,上述T为时标周期,n及n’为正整数,并且,n’<n,上述功率电平满足下列关系:
Pw或Pw’>Pe>Pb或Pb’
至少x、y、z之一处于下列范围:
0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70。
8.根据权利要求7中所述的光信息记录装置,其特征在于,当上述盘驱动器驱动光信息记录媒体以Vm/s~3Vm/s记录线速度范围回转时,上述激光驱动电路发出的激光脉冲照射光信息记录媒体,上述V为3~13。
9.根据权利要求7或8中所述的光信息记录装置,其特征在于,上述光信息记录媒体设有同心槽和螺旋槽中至少一种,上述同心槽和/或螺旋槽沿光信息记录媒体径向摆动,摆动周期为4.0μm~4.6μm,上述激光驱动电路沿上述同心槽和/或螺旋槽用激光脉冲照射光信息记录媒体。
10.根据权利要求7或8中所述的光信息记录装置,其特征在于,当x,y,z中至少一个在上述范围固定为一特定值时,1信号被记录或重写。
11.根据权利要求7或8中所述的光信息记录装置,其特征在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行0信号和1信号的记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
12.根据权利要求9中所述的光信息记录装置,其特征在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行0信号和1信号的记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
13.一种光信息记录媒体,包括:
一单板盘,该单板盘设有透明基板、设于透明基板表面上的下保护层、设于上述下保护层之上的相变化型记录层、设于上述记录层之上的上保护层、设于上述上保护层之上的反射层以及设于上述反射层之上的外敷层;其特征在于:
上述光信息记录媒体储存信息,具有信号宽度为nT的0信号以及信号宽度为nT的1信号被记录或重写在相变化记录层,使用功率电平为Pe的连续激光记录或重写上述0信号,使用光脉冲列记录或重写上述1信号,该光脉冲列由以下构成:初始脉冲部分(fp),其具有功率电平Pw,脉冲宽度xT;多脉冲部分(mp),其包括复数高电平脉冲、以及当n-n’>1时的低电平脉冲,上述高电平脉冲为(n-n’)次,具有功率电平Pw’,脉冲宽度yT,上述低电平脉冲位于两个高电平脉冲间,具有功率电平Pb,脉冲宽度(1-y)T;端脉冲部分(ep),其具有功率电平Pb’,脉冲宽度zT;其中,上述T为时标周期,n及n’为正整数,并且,n’<n,上述功率电平满足下列关系:
Pw或Pw’>Pe>Pb或Pb’
至少x、y、z之一处于下列范围:
0.35≤x≤0.75,0.30≤y≤0.55,0.35≤z≤0.70
当使用储存在上述光信息记录媒体中的信息,将x,y,z中至少一个在上述范围固定为一特定值时,1信号被记录或重写。
14.根据权利要求13所述的光信息记录媒体,其特征在于,对功率电平Pw,Pw’,Pe,Pb及Pb’进行控制,实行0信号和1信号的记录或重写,当记录或重写的信号再生时,该记录或重写的信号的不稳定特性σ/T不大于9%,调制度不小于0.55,反射率不小于16%。
15.根据权利要求13或14所述的光信息记录媒体,其特征在于,上述光信息记录媒体设有同心槽和螺旋槽中至少一种,上述同心槽和/或螺旋槽沿光信息记录媒体径向摆动,摆动周期为4.0μm~4.6μm。
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