CN1287360C - Optical information recording medium, optical information recording/reproducing method - Google Patents

Optical information recording medium, optical information recording/reproducing method Download PDF

Info

Publication number
CN1287360C
CN1287360C CN 02147334 CN02147334A CN1287360C CN 1287360 C CN1287360 C CN 1287360C CN 02147334 CN02147334 CN 02147334 CN 02147334 A CN02147334 A CN 02147334A CN 1287360 C CN1287360 C CN 1287360C
Authority
CN
China
Prior art keywords
layer
information
recording
ta
tc
Prior art date
Application number
CN 02147334
Other languages
Chinese (zh)
Other versions
CN1412749A (en
Inventor
鳴海建治
西内健一
宮川直康
児島理惠
西原孝史
山田昇
Original Assignee
松下电器产业株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2001314827 priority Critical
Application filed by 松下电器产业株式会社 filed Critical 松下电器产业株式会社
Publication of CN1412749A publication Critical patent/CN1412749A/en
Application granted granted Critical
Publication of CN1287360C publication Critical patent/CN1287360C/en

Links

Abstract

一种具有2个或更多信息层的光信息记录媒体,其特征在于:利用激光光束聚集于信息层,使信息信号被记录或再现;位于比离开激光光束入射方最远的信息层较为近的信息层具有1个记录层,该记录层在二种可光检测的状态之间变化,并且0≤|T Having two or more optical information recording medium the information layer, characterized in that: the laser beam using the information gathered in layers, so that the information signal is recorded or reproduced; a more recent than the information layer farthest away from the laser beam incident side of information layer having a recording layer between two optically detectable states change in the recording layer, and 0≤ | T

Description

光信息记录媒体和光信息记录/再现方法 Optical information recording medium and optical information recording / reproducing method

技术领域 FIELD

本发明涉及光信息记录媒体如光盘之类。 The present invention relates to an optical information recording medium such as an optical disk or the like.

背景技术 Background technique

近年来,人们已提出和开发光盘,光卡和光(磁)带作为光信息记录媒体。 In recent years, it has been proposed and developed an optical disk, optical cards and optical (magnetic) with an optical information recording medium. 尤其是,光盘作为媒体可大容量,高密度地记录和再现信息,故格外引人注目。 In particular, a large-capacity optical disk as a medium may be a high density recording and reproducing information, it is particularly noticeable.

一种可擦去型光盘是相变型光盘。 A wipe optical disk is a phase change type optical disc. 相变型光盘中应用的记录薄膜,根据利用激光光束加热和冷却的条件可取非晶体状态和结晶状态,这两种状态相互间可互相转换。 Phase-change recording film of the optical disc applications, preferably the amorphous state and the crystalline state by the laser beam under the conditions of heating and cooling, these two states can be converted mutually to each other. 记录薄膜的光常数在非结晶状态和结晶状态之间是不同的。 An optical recording film is constant between amorphous state and crystalline state are different. 在相变型光盘中,根据信息信号在记录薄膜上有选择地形成一种状态或另一种状态或两种状态,利用形成的光变化(即,透射率或反射率的变化)来记录或再现信息信号。 In the phase change optical disk, the information signal is formed on the recording film one state to another state or two states or alternatively, the light changes (i.e., changes in transmittance or reflectance) using a recording or to form reproduction of information signals. 为了取得两种状态,信息信号由下列方法加以记录。 In order to achieve the two states, the information signal to be recorded by the following methods.

采用功率以脉冲形式对光盘记录薄膜加以照射,来提高记录薄膜的温度至高出其溶点时(此后称峰值功率),此熔解部分很快地随着激光光束的通过而冷却,呈现非结晶状态的记录记号。 When using the power in a pulse form to be irradiated on the optical disk recording film, recording film to increase to a temperature above its melting point (hereinafter referred to peak power), which partially melted by the laser beam as quickly is cooled, the amorphous state exhibits the record mark. 或当记录薄膜由强度可转换的激光光束来照射时提高记录薄膜的温度至其结晶温度,但不超过熔点温度时(以后称偏置功率),记录薄膜的被照射部分转变为结晶状态。 Or to improve the recording thin film is irradiated when the laser beam intensity by the temperature of the recording film can be converted to its crystallization temperature, but not exceeding the melting temperature (hereinafter referred to as bias power), the irradiated portion of the recording film into a crystalline state.

此外,近年来人们强烈需求一种高密度的光盘。 In addition, in recent years there is a strong demand for a high-density optical disc. 就此而论,现已建议一种在光盘厚度上具有二层或多层的多层记录媒体,其中信息可记录在各信息层上,或从该些层上现现出来。 In this connection, has been recommended that the multilayer having two or more layers on an optical disk thickness of the recording medium, wherein the information can be recorded on each information layer, these layers or from the now visible.

然而,使用通常方法当记录至离激光入射方较远的里面的信息层上时,人们担心,较远的里面的信息层会受到较近的信息层的影响。 However, when using the usual method from the recording laser light is incident to the upper side of the information layer farther inside, it is feared that the farther inside information layer is affected by the nearer information layer.

例如,根据是否有任何信号记录在信息记录层的记录/再现区,此层的透射率是不同的。 For example, depending on whether there is any signal recorded in the recording layer of the information recording / reproducing area, the transmittance of the layer are different. 因此,产生一个问题,即,当记录在较远的信息层时,到达较远的信息层的激光光束的光强随着较近的信息记录层上激光点中非晶区和结晶区之比而变化,这样就不可能进行精确记录。 Thus, a problem arises, i.e., when the information recorded in the far layer, reaches the light intensity of the laser beam than the information layer farther as the laser spot on the nearer information recording layer amorphous and crystalline regions of The change makes it impossible to conduct accurate records.

又一问题是,当在较远的信息层上再现数据时,根据较近的信息层的记录状态而发生的透射率变化,会引起再现的信号质量的恶化。 A further problem is that, when reproducing the data on the information layer farther, the transmittance of the information layer in accordance with the recording state of the nearer changes occur, causing deterioration in the quality of the reproduced signal.

发明内容 SUMMARY

本发明的目的是要通过提供一种光信息记录媒体和在此类多层记录媒体中的较远的里面的信息层上可精确地记录数据和从该层上再现出来的方法来解决这些问题。 In such a multilayer recording medium and the recording can be accurately recording and reproducing data out of the upper layer farther inside information layer of the media object to solve these problems by the present invention is to provide an optical information .

本发明的第一发明是一种具有2个信息层的光信息记录媒体,激光光束集中照射至所述任一信息层,可使信息信号被记录或再现,其中:位于比离开所述激光光束入射方最远的信息层较为近的1个信息层具有1个记录层,该记录层在二种可光检测状态之间变化,光信息记录媒体具有的配置为:0≤|Tc-Ta|/Tc≤0.1,且(Ta+Tc)/2≥0.4其中Tc是所述记录层在a状态时所述较近位置的信息层的透射率,和Ta是所述记录层在b状态时的所述同一信息层的透射率,位于比离开所述激光光束入射方最远的信息层较为近的信息层至少具有第1介质层,相位变化记录层,第2介质层,金属反射层和第3介质层,所述各层从入射方向内排列的顺序为:所述第1介质层,所述相位变化记录层,所述第2介质层,所述金属反射层和所述第3介质层,所述激光光束波长在390nm至430nm范围内,和所述金 The first invention of the present invention is an optical information of the two information layers has a recording medium irradiated with focused laser beam to any one of the information layer, the information signals can be recorded or reproduced, wherein: said laser beam is located away ratio incident side farthest information layer of a more recent information layer having a recording layer, the recording layer changes between the two kinds of photo-detection state, the optical information recording medium having a configuration of: 0≤ | Tc-Ta | /Tc≤0.1, and (Ta + Tc) /2≥0.4 wherein Tc is the time when the recording layer is in a state in which the transmittance of the information layer closer position, and Ta is the state of the recording layer b the transmittance of the same information layer, positioned away from said laser beam is incident than the farthest information layer side relatively close to the information layer having at least a first dielectric layer, a phase change recording layer, a second dielectric layer, and the second metal reflective layer 3 dielectric layers, said layers are arranged sequentially from the incident direction: a first dielectric layer, the phase change recording layer, said second dielectric layer, the metal reflective layer and the third dielectric layer the laser beam having a wavelength in the range of 430 nm to 390nm, and the gold 反射层至少由Ag或以Ag为主要成分的合金组成,具有的配置为:当tb≤18时,ta≤12当16<tb≤18时,ta≤38-tb当18<tb≤20时,ta≤10当20<tb≤24时,ta≤30-tb和当24<tb≤26时,ta≤28-tb其中ta[nm]是所述相位变化记录层的厚度,tb[nm]是所述金属反射层的厚度;以及 At least a reflective layer made of Ag or an alloy having Ag as a main component, has a configuration as follows: When tb≤18 when, ta≤12 when 16 <tb≤18 time, ta≤38-tb when 18 <tb≤20 time, when ta≤10 20 <tb≤24 time, ta≤30-tb, and when 24 <tb≤26, ta≤28-tb where ta [nm] is the thickness of the phase change recording layer, tb [nm] is the thickness of the metal reflective layer;

Ac<Aa和Rc>Ra,其中Ac[%]是当所述相位变化记录层是结晶时位于比离开所述激光光束入射方最远的信息层较为近的信息层的所述相位变化记录层的吸收指数,Aa[%]是当所述相位变化记录层是非晶体的时候该层的吸收指数,和Rc[%]是当所述相位变化记录层是结晶的时候所述较近的信息层的反射率,Ra[%]是当所述相位变化记录层是非晶体时该层的反射率。 Ac <Aa and Rc> Ra, where Ac [%] when the phase change recording layer is positioned away from crystalline than said laser beam incident side the information layer farthest from the more nearly the phase change information recording layers the absorption index, Aa [%] is the time when the phase change recording layer is an amorphous layer of the absorption index, and Rc [%] when the phase change recording layer is crystalline when the nearer information layer reflectance, Ra [%] when the phase change of the reflectance layer recording layer is amorphous.

第四发明是一种光信息记录/再现的方法,通过用激光光束照射如第一发明所述的光信息记录媒体而记录或再现信息信号,其中:通过用来自所述光信息记录媒体一侧的所述激光光束照射所述信息层中的1个,记录或重现信息信号。 The fourth invention is an optical information recording / reproducing method, a laser beam is irradiated through the recorded optical information recording medium with said first or reproducing information signals, wherein: by using the optical information recording medium from the side irradiating said laser beam in the information layer 1, recording or reproduction of information signals.

附图说明 BRIEF DESCRIPTION

图1是实施本发明的第1种实施方式的光信息记录媒体外视图和截面图。 Figure 1 is a first embodiment of the optical information of the present invention embodiments as a recording medium and an outer cross-sectional view of FIG.

图2是第1实施例的第1信息层截面图。 FIG 2 is a sectional view of a first information layer of Example 1.

图3示出第1实施例中C/N的峰值功率关系图。 Figure 3 shows a first embodiment of the C / N of the peak power diagram.

图4a和4b示出第1实施例中平均透射率和透射比的计算结果。 Figures 4a and 4b show a first embodiment the average transmittance and the transmittance of the calculation result.

图5是第2实施例中第1信息层的截面图。 FIG 5 is a sectional view of the first information layer in the second embodiment.

图6a和6b示出第2实施例中平均透射率和透射比的计算结果。 Figures 6a and 6b show a second embodiment of the calculation result of the average transmittance and the transmittance ratio.

图7示出在第1和第2实施方式中出自第2信息记录层的再现信号的波形。 Figure 7 shows a signal reproduced by the second information recording layer in the first embodiment and the second embodiment of the waveform.

图8是实施本发明的另1种方式中光信息记录媒体的外视图和截面图。 8 is an external view and a sectional view of another embodiment of the present invention, one kind of the optical information recording medium.

图9a-9c是本发明实施例中第1种光测法过程的示意图。 FIGS. 9a-9c are schematic process in the first embodiment of the seed light measurement method of the present invention.

图10a-10c是本发明实施例中第2种光测法过程的示意图。 FIGS 10a-10c are schematic process in the second embodiment of the seed light measurement method of the present invention.

图11a-11c是本发明实施例中第3种光测法过程的示意图。 FIGS 11a-11c are schematic process in the third embodiment of the seed light measurement method of the present invention.

符号说明1、光盘2、第1信息层3、第2信息层4、5基板 REFERENCE SIGNS LIST 1 substrate 4 and 5, the optical disc 2, the first information layer 3, the second information layer

6、中间层7、物镜8、激光光束9、第1介质层10、第2介质层11、记录层12、反射层13、第3介质层具体实施方式本发明参照实施例,以更具体的方式描述如下。 6, the intermediate layer 7, the objective lens 8, the laser beam 9, the first dielectric layer 10, the second dielectric layer 11, recording layer 12, reflective layer 13, the third dielectric layer embodiment of the present invention with reference to Examples, more particularly of described below.

第1实施例图1和图2是实施本发明的第1种方式的光信息记录媒体的示意图。 The first embodiment of FIG. 1 and FIG. 2 is a schematic view of the optical information of the first embodiment of the present invention, one kind of recording medium embodiment.

图1中光盘1的截面图示于图2。 1 illustrates a cross section of the optical disc 1 in FIG. 2 in FIG. 图2示出具有2层信息记录层的光盘和光盘由激光光束照射的状态。 FIG 2 shows a state having two information recording layers of the optical disk and the optical disk is irradiated by the laser beam. 光盘1具有位于较近光源的第1信息层2和位于离光源较远的第2信息层3。 Optical disc 1 having the first information layer is positioned nearer the light source 2 and the second information layer positioned farther from the light source 3. 每个信息层是通过在基板4或5上事先形成纹道或相位凹坑并形成介质层、记录层、反射层之类的薄膜而生产的。 Each information layer is formed in advance by phase pits or a groove on the substrate 4 or 5 and forming a thin-film dielectric layer, a recording layer, a reflective layer or the like produced. 基板用紫外线凝固的树脂进行粘合,组成中间层6。 Bonded substrate solidified resin with ultraviolet rays, the composition of the intermediate layer 6.

另一种方法也是可以接受的,即在已形成纹道或相位凹坑的基板4上形成了组成第2信息层3的各层以后,形成具有纹道或相位凹坑的中间层6,并在组成第1信息层2的各层形成后与基板5相结合(也称盖板层)。 After another method is also acceptable, i.e., each layer is formed consisting of the second information layer 3 formed on the substrate has a groove or a phase pit 4, 6 forming an intermediate layer having a groove or a phase pit and Since the formation of the respective layers of the first information layer 2 is formed in combination with the substrate 5 (also called cover layer).

基板4和5采用玻璃,树脂之类的扁平的透明板。 4 and 5 the substrate glass, resin or the like of the flat transparent plate. 另一种方法是,基板4和5也可通过把树脂溶解于溶剂涂料中,并烘干而形成。 Another method, the substrate 4 and 5 may be through the coating resin dissolved in a solvent, and dried and formed.

图2是截面图,示出组成图1的较近的信息层的第1信息层的配置实例,从激光光束入射方来观察。 2 is a sectional view showing a configuration example of the composition of the first information layer nearer information layer in FIG. 1, viewed from the laser beam incident direction.

对基板5上的第1介质层9和第2介质层10,氧化物如SiO2,SiO,TiO2,MgO或GeO2,氮化物如,Si3N4,BN或AIN,硫化物如,ZnS或PbS或它们的混合物都可使用。 The first dielectric layer 9 and a second dielectric layer on the substrate 510, an oxide such as SiO2, SiO, TiO2, MgO or of GeO2, nitrides such as, Si3N4, BN or AIN, such as sulfides, ZnS or PbS or their The mixture can be used.

作为记录层11的记录薄膜材料是一种经历非结晶状态和结晶状态之间相位变化的材料,如SbTe基,InTe基,GeTeSn基,SbSe基,TeSeAu基,TeGeSnSb基或TeGeSb基硫属化合物都可使用。 As the recording thin film material of the recording layer 11 is a material undergoes a phase change between the amorphous state and the crystalline state, such as SbTe-based, InTe-based, GeTeSn group, SbSe group, TeSeAu group, TeGeSnSb group or TeGeSb-based chalcogen compound are be usable. 一种Te-TeO2基,Te-TeO2-Au基,TeTeO2-Pd基或一些其他氧化物基的材料也可使用。 A material TeTeO2 group, TeTeO2-Au-yl, TeTeO2-Pd-based or some other oxide-based can also be used. 这些材料的任一种都会引起结晶状态(相等于a状态)和非结晶状态(相等于b状态)之间的相位变化。 Phase change between any of these materials will cause the crystalline state (a state equivalent) and amorphous state (state equivalent b). 此材料也和AgZn基或InSb基金属化合物一样引起一种结晶状态(a状态)和另一种非结晶状态(b状态)之间的相位变化。 And this material is also AgZn-based or InSb-based metallic compound as a crystalline due to the state (a state) and another non-crystalline state phase change between (b state).

作为反射层12,金属材料以Au,Ag,Al或Cu或在予定波长上具有高反射率的多层介质薄膜均可使用。 As the reflective layer 12, a metal material is Au, Ag, Al or Cu or with a predetermined wavelength on the high reflectivity multilayer dielectric film may be used.

薄膜由这些材料通过真空蒸汽沉淀法或溅射法而形成。 Film is formed from these materials by vacuum vapor deposition or sputtering.

此外,如果利用激光光束可探测作为信息的反射射线的光变化,则第2信息层3可采用任何形式。 In addition, if the use of a laser beam can be detected as a change in light rays reflected information, the second information layer 3 may take any form. 同样对第1信息层2,它可以是包含相位变化记录层的多层薄膜或具有磁光记录层或染料层的多层薄膜。 Similarly to the first information layer 2, it may be a multilayer film comprising a phase change recording layer or a multilayer film having a magneto-optical recording layer or a dye layer. 或它也可以是在基板4中作为相位凹坑进行记录的形式。 Or it may be in the form recorded in the substrate 4 as a phase pit.

本发明关键点在于通过合适地选择所述配置中各层的薄膜厚度,在记录前和记录后(已记录状态和未记录(擦去的)状态)第1信息层2在二种状态中的透射率是相等的,这样,在记录或再现时到达第2信息层的激光光束的光强在任一状态中可保持相等。 The key point of the present invention wherein the configuration of the layers in the film thickness by suitably selecting, before recording and after recording (recorded state and unrecorded (wiped off) state) of the first information layer 2 in two states transmittance are equal, so that the light intensity of the laser beam reaching the second information layer at the time of recording or reproducing can be kept equal in either state. 又,到达第2信息层的激光光束的光强必须足够大,以便记录和再现。 And reaches the second information layer, the light intensity of the laser beam must be large enough so as to record and reproduce. 顺便举例来说,下面将讨论一种情况,即未记录(已擦去的)的部分处于结晶状态和记录部分处于非结晶状态。 Incidentally, for example, will be discussed a case in which the unrecorded (been wiped off) portion and a recording portion in a crystalline state in a non-crystalline state.

根据组成第1信息层各层的材料的光常数和薄膜厚度,采用已知的矩阵方法可计算出第1信息层2的透射率(矩阵方法陈述于Hiroshi Kubota,HadoKogaku(光波光学),Iwanami Shoten,1971,第3章),其通过引用结合于此。 The optical constants and the film thickness of the respective layers composed of the first information layer of the material, using known methods to calculate the matrix transmittance of the first information layer 2 (matrix method set forth in Hiroshi Kubota, HadoKogaku (optical light wave), Iwanami Shoten , 1971, Chapter 3), which is incorporated herein by reference.

表1的实例示出了本实施例试生产的光盘第1信息层2薄膜厚度的配置,计算出的在非结晶状态(Ta)和结晶状态(Tc)中的透射率,在非结晶状态(Ra)和结晶状态(Rc)中的反射率,在非结晶状态(Aa)和结晶状态(Ac)中的吸收指数,在非结晶状态和结晶状态之间的透射比(Tc-Ta)/Tc,和平均透射率(Ta+Tc)/2。 Examples Table 1 shows the configuration of the second film thickness of the optical disk of the first information layer according to the present embodiment, pre-production, the transmittance calculated in the amorphous state (Ta) and the crystalline state (Tc) of the non-crystalline state ( Ra) and the crystalline state reflectivity (Rc) in, absorption index in the amorphous state (Aa) and the crystalline state (Ac) in the transmission ratio between the amorphous state and the crystalline state (Tc-Ta) / Tc , and average transmittance (Ta + Tc) / 2.

(表1) (Table 1)

在本实例中,为了使到达第2信息层的激光光束的光强在非结晶状态和结晶状态之间在记录或再现期间是相等的,透射比的绝对值(Tc-Ta)/Tc越小越理想。 In the present example, in order to make the laser beam reaching the second information layer of the light intensity between amorphous state and crystalline state during recording or reproducing are equal, the absolute value of (Tc-Ta) transmittance / Tc smaller the more ideal. 还希望,使平均透射率(Ta+Tc)/2最大化,以保证有足够的激光光束的光强到达第2信息层上,用于记录和再现。 Also desirable, that the average transmittance (Ta + Tc) / 2 maximized to ensure sufficient light intensity of the laser beam reaching the second information layer for recording and reproducing. 在本实例中,如表1所示,通过改变记录层厚度ta,反射层厚度tb,第1介质层厚度t1和第2介质层厚度t2,可制备第1信息层2的6种不同透射比和平均透射率的光盘。 In the present example, as shown in Table 1, by changing the recording layer thickness TA, TB reflective layer thickness, the thickness t1 of the first dielectric layer and the second dielectric layer thickness t2, 6 different transmittance of the first information layer 2 may be prepared and the average transmittance of the disc.

各光盘由下面方式来生产。 Each disc produced from the following manner. 基板4采用直径为120mm,厚度为1.1mm的聚碳酸酯板,在此板表面上形成0.25um宽,0.32um间矩和20nm深度的螺旋纹道。 4 substrate with a diameter of 120mm, a polycarbonate plate having a thickness of 1.1mm, the width of 0.25um formed on this substrate surface, between 0.32um moment and the helical groove depth of 20nm. 在基板4表面上形成第2信息层3,厚度为100nm的AgPaCu反射层(光常数为0.32至2.06i),厚度为15nm的ZnS-SiO2介质层(光常数为2.25至0.00i),12nm厚度的GeSbTe的记录层(光常数:结晶状态时1.78至3.51i;非结晶状态时3.31至2.29i)和60nm厚的ZnS-SiO2介质层等接连地形成。 Forming the second information layer 3, the thickness of 100nm AgPaCu reflective layer (light constant of 0.32 to 2.06i), a thickness of 15nm ZnS-SiO2 dielectric layer (optical constant of 2.25 to 0.00i), 12nm thickness on the surface of the substrate 4 a GeSbTe recording layer (optical constant: 1.78 to crystalline state 3.51i; 3.31 to 2.29i non-crystalline state) is formed successively and 60nm thick ZnS-SiO2 dielectric layer and the like.

其次,第2信息层3的记录层通过激光光束的照射开始从非结晶状态向结晶状态变化,接着形成中间层6,在此层上转制如基板4的相同的纹道。 Next, the recording layer 3 of the second information layer by irradiating the laser beam starts to change from the amorphous state to the crystalline state, the intermediate layer 6 is then formed, such as the conversion of the same track on the substrate 4 in this layer.

作为第1信息层2,形成厚度为tbnm的AgPaCu反射层,相继形成的有厚度为t2nm的ZnS-SiO2的第2介质层,厚度为tanm的GeSbTe的记录层和厚度为t1nm的ZnS-SiO2第1介质层。 As the first information layer 2 is formed AgPaCu reflective layer having a thickness of tbnm, there are successively formed in a thickness of the second dielectric layer t2nm of ZnS-SiO2, the thickness of the recording layer and the thickness of GeSbTe tanm of ZnS-SiO2 of t1nm of dielectric layer. 在这些薄膜形成后,第1信息层2的记录层通过激光光束的照射,通过从非结晶状态向结晶状态变化而被初始化。 After these films are formed, the first information layer of the recording layer 2 by irradiation of the laser beam by the change from amorphous state to a crystalline state to be initialized.

最后,由聚碳酸酯组成的基板5使用紫外线凝固的树脂加以粘结。 Finally, the substrate 5 composed of polycarbonate resin to be solidified using an ultraviolet adhesive. 粘合部分和基板5的总厚定为0.1mm。 The total thickness of the adhesive portion and the substrate 5 was set to 0.1mm.

使用这6种不同的光盘进行记录/再现测试。 Using six different optical disc recording / reproducing tests. 每种光盘以线性速度5m/S旋转,不论是光盘的信息层2或3均用半导体激光光束来照射,光束波长为405nm,利用物镜收缩至0.85数值孔径(NA)。 Each disc at a linear speed of 5m / S rotation, whether the information layer of the optical disc 2 or 3 are irradiated with a semiconductor laser beam, a light beam having a wavelength of 405nm, the objective lens numerical aperture 0.85 to shrink (NA).

作为记录和再现的调制码,使用(8-16)调制,调制信号转为多脉冲以产生半导体激光。 As the modulation code for recording and reproducing using a (8-16) modulation, the modulation signal into a multi-pulse to generate the semiconductor laser. 3T记号长度被设定为0.20um。 3T mark length is set to 0.20um.

下面将陈述设定记录功率的方法,参照图3。 The following method of setting the recording power will be set forth with reference to FIG. 当处在第1信息层2没作记录的状态中,3T周期信号通过变化峰值功率被记录在第2信息层3上,记录后可测得再现信号的C/N。 When the state in the first information layer 2 did not make the record, 3T periodic signals were recorded by varying the peak power on the second information layer 3, the recording measurable signal reproduced C / N. C/N与峰值功率的依赖关系绘于图3,(饱和的C/N-3dB)的峰值功率由Ppth来表示,信息记录用的最佳峰值功率Pps已计算出来,定义为:Pps=Ppth×1.2。 C / N of the peak power dependency is plotted in Figure 3 (saturated C / N-3dB) represented by the peak power pPTH, optimum information recording peak power Pps is calculated, defined as: Pps = Ppth × 1.2.

现已算出最佳偏置功率为如下偏置功率Pbo,通过变化偏置功率,记录3T信号并稍后重写信号11T,而峰值功率保持不变,可给出最高的擦去率。 Now compute the optimal bias power Pbo is as follows bias power, by varying the bias power, recording 3T signals and later overwriting 11T signals, and the peak power kept constant, the wipe can be given the highest rate.

下面讲述位于较近光源的第1信息层对位于较远的第2信息层的影响。 Effects of the first information layer is positioned nearer to the source of the second information layer positioned farther below about.

随机信号记录在第1信息层2的最内圆周至最外圆周的一半圆状区域内。 Recording the random signal to the outermost circumference of the innermost circumference of the information layer 2 of the first half of the circular area.

当利用峰值功率Pps和偏置功率Pbo使3T周期信号记录在第2信息层3上为整整一圈光声道时并再现些信号时,再现信号的幅度波动,与第1信息层2的未记录区和记录区匹配,每次为半圈。 When using a peak power and bias power Pbo Pps 3T periodic enable signals are recorded on the second information layer 3 is light channel full circle and reproducing such signals, the amplitude of fluctuation of the reproduction signal, the first information layer 2 is not recording region and the recording region matching, each half circle. 这些再现信号包路线的变化量也可测得。 The amount of change in the reproduction signal can also route packets measured. 第1信息层2的包络线变化率可参考该层未记录区的再现信号的幅度加以计算。 The first information layer 2 the envelope change rate may be calculated with reference to the reproduction signal amplitude of the unrecorded area of ​​the layer. 使用由A1表示的第1信息层2的未记录区的再现信号幅度和由A2表示的记录区的再现信号幅度,由下列方程式定义包络线的变化率:变化率=(A1-A2)/A1同时也可测出再现信号误差率。 Using the reproduction signal amplitude of the reproduction signal amplitude and the recording area indicated by A2 unrecorded area in the first information layer 2 is represented by A1, the following equation defines the rate of change of the envelope: change rate = (A1-A2) / A1 also can be measured reproduction signal error rate.

包络线变化率的测量结果和误差率示于表2。 Measurement error and rate of change of the envelope is shown in Table 2.

(表2) (Table 2)

在光盘1至3给出令人满意的误差率,低于一般可接受的误差率的门限1×10-4,而光盘4至6的误差率却不够低。 1 to 3 are given in the optical disc satisfactory error rate, lower than the threshold error rate of the generally accepted limit of 1 × 10-4, while discs error rate is low enough 4-6.

光盘1至4的包络线变化率是令人满意的,不到5%,但光盘5至6的包络线变化率要比5%大。 Envelope change rate of the optical disk 1 to 4 are satisfactory, less than 5%, but the rate of change of the envelope of the optical disc 5 to 6 than 5% soybean.

当在由二进制化电路和PLL(锁相回路)电路组成的再现信号处理电路中测得每一光盘的第2信息层3所再现的信号时,光盘4至6在二进制化电路运作时是不稳定的,因为它们的包络线波动大,而考虑到光盘4至6的再现信号质量不合适,故在PLL电路运作时,也是不稳定的。 When the measured signals for each of the second information layer 3 of the optical disc reproduced by the reproduced signal processing circuit and a binarization circuit PLL (phase locked loop) circuit in the optical disc 4 to 6 when binarizing circuit operation is not stable because of their large envelope fluctuations, but inappropriate considering the quality of the reproduction signal of the optical disc 4 to 6, so in the PLL circuit operation is unstable.

这些结果可认为是下列原因而产生的。 These results can be considered to be generated by the following reasons. 可以想象,在光盘1至3中,第1信息层2的记录区的透射率和未记录区的透射率变化很小,根据第1信息层2的记录状态,到达第2信息层3的激光光束的光强变化也小,包络线变化也小,故形成二进制化操作稳定化,和误差率也降低。 Conceivable, in the optical disc 1 to 3, the transmittance of the transmittance of the recording area of ​​the first information layer 2 and the unrecorded area of ​​little change, according to the recording state of the first information layer 2, the laser beam reaches the second information layer 3 change in light intensity of the light beam is small, the envelope change is small, so the formation of stabilized binarizing operation and a reduced error rate. 示于表2的结果揭示光盘1、2、3的优异性,表1还揭示当透射比的绝对值不超过10%,可取得令人满意的误差率或小于1×10-4的比例。 The results are shown in Table 2 reveal the superiority of the optical disc 1, 2, also disclosed in Table 1 when the absolute value of the transmittance is less than 10%, can achieve a satisfactory error rate or less than the ratio of 1 × 10-4.

在光盘4至6中,当第1信息2的平均透射率是低的,则在第2信息层3记录和再现信息的期间,到达此信息层的激光光束的光强就较小,毫无疑问,就造成再现信号质量恶化和较高误差率的结果。 In the optical disc 4 to 6, when the average transmittance of the first information 2 is low, then during 3 information recording and reproducing the second information layer, reaches the light intensity of the laser beam on the information layer is small, there is no doubt, it causes deterioration of the reproduction signal quality results and a higher error rate. 示于表2的结果揭示光盘4、5、6的缺陷,接着表1还揭示误差率也不够好,当平均透射率小于40%,其误差率超过1×10-4。 The results are shown in Table 2 reveal defects 4,5,6 disc, then Table 1 also reveals the error rate is not good enough, when the average transmittance is less than 40%, the error rate of more than 1 × 10-4.

从这些发现来看,众所周知,因为光盘1至3的第1信息层的透射比(Tc-Ta)/Tc的绝对值降低至10%或更低些,和第一信息层2的平均透射率(Ta+Tc)/2提高至40%或更多些,这样,信息才能满意地记录或再现在第2信息层3上。 From the point of view of these findings, it is known as the transmittance of the optical disc 1 to the first information layer 3 of (Tc-Ta) / Tc is reduced to an absolute value of 10% or lower, and the average transmittance of the first information layer 2 (Ta + Tc) / 2 raised to some 40% or more, so that the information can be satisfactorily recorded or reproduced on the second information layer 3.

在图2所示的配置中,对于要使平均透射率(Ta+Tc)/2提高至40%或更高些,又使透射比(Tc-Ta)/Tc降低至10%或更低些的薄膜厚度条件要通过计算加以检查。 In the configuration shown in FIG. 2, for the make the average transmittance (Ta + Tc) increase / 2 to 40% or higher, and the transmittance ratio (Tc-Ta) / Tc decreased to 10% or lower the film thickness conditions to be checked by calculation. 图4a,4b示意图绘出了平均透射率(Ta+Tc)/2的变化和透射比(Tc-Ta)/Tc的变化,举例来说,记录层厚度ta设定为10nm,反射层厚度tb设定为10nm,第1介质层的薄膜厚度t1和第2介质层的薄膜厚度t2是变化的。 Figures 4a, 4b depicts a schematic average transmittance (Ta + Tc) change and transmittance / 2 (Tc-Ta) / Tc changes in, for example, thickness ta of the recording layer is set to 10 nm, the reflective layer thickness tb is set to 10nm, film thickness t1 and t2 the film thickness of the second dielectric layer first dielectric layer is varied. 在图4中,激光光束波长设定为405nm,以激光光束的波长(λ)为基准,指出了下面介质薄膜厚度和下面介质薄膜厚度的光长度。 In FIG. 4, a wavelength of the laser beam is set to 405nm, the wavelength of the laser beam ([lambda]) as a reference, the optical length indicated below dielectric film thickness and the film thickness of the dielectric below.

如果能给出如图4a中平均透射率(Ta+Tc)/2为40%或更多些的介质薄膜厚度,和能给出图4b中透射比(Tc-Ta)/Tc的绝对值为10%或更少些的介质层薄膜厚度,这二种介质层薄膜厚度可做得互相兼容的话,则这些薄膜厚度的记录层和反射层组合可使第1信息层2配置得以致有可能令人满意地记录和重现信息于第2信息层3上。 Figure 4a can be given if the average transmittance (Ta + Tc) / 2 of 40% or more of these dielectric film thickness, and can be given in absolute values ​​of transmittance (Tc-Ta) / Tc in Figure 4b some 10% or less of the film thickness of the dielectric layer, these two kinds of the film thickness of the dielectric layer can be made compatible with each other, then the combination of the recording layer of the reflective layer and the film thickness of the first information layer 2 can arranged so that it is possible to make satisfactorily in recording and reproducing information on the second information layer 3.

表3示出,当记录层厚度ta从2至32nm间改变,以及反射层厚度tb从2至36nm间改变时,无论第1信息层是否有潜力保持平均透射率(Ta+Tc)/2在40%或更高些,透射比(Tc-Ta)/Tc的绝对值为10%或低些是可以配置的。 Table 3 shows, when the recording layer thickness ta tb changed from between 2 to 36nm from 2 to 32nm inter-change, and a reflective layer thickness, both of the first information layer if there is the potential to maintain the average transmittance (Ta + Tc) / 2 in 40% or higher, the transmittance ratio (Tc-Ta) / Tc in absolute value of 10% or lower is configurable.

在此表中,记号○指出适当的薄膜厚度ta和tb能保持平均透射率在40%或更高些,和透射比的绝对值为10%或更低些。 In this table, a symbol ○ indicate the appropriate film thickness ta and tb can keep the average transmittance of 40% or higher, and the absolute value of transmittance is 10% or lower. 又,此外,X记号说明,不论ta和tb选择如何,不可能保持平均透射率在40%或更高些和透射比的绝对值为10%或更低些。 And, in addition, X mark description, regardless of how to select ta and tb, can not keep the average transmittance of 40% or higher, and the absolute value of transmittance is 10% or lower. 换句话说,在图4a,b中没有任何区会有平均透射率在40%至50%,透射比的绝对值为-10至+10%。 In other words, in FIG. 4a, b does not have any region average transmittance of 40% to 50%, the absolute value of the transmittance ratio is from -10 to + 10%.

如果参照图4a和4b,对各个记录层和反射层的组合进行计算,并利用介质层薄膜厚度的变化,人们可以找到平均透射率和透射比相兼容的一个点,这就可以考虑为,满足条件的第1信息层2可加以配置了。 Referring to Fig 4a and 4b, the combination of the respective recording layers and the reflective layer is calculated using the change in film thickness and a dielectric layer, one can find the average transmittance and the transmittance of a compatible point, which may be considered to meet the condition of the first information layer 2 may be configured.

(表3) (table 3)

此表揭示满足下列条件的薄膜厚度可提供一种配置,即具有一潜力来满足平均透射率为40%或更高些和透射比的绝对值为10%或更小些的要求。 This table discloses the film thickness satisfies the following conditions may provide a configuration, i.e., having the potential to satisfy an average transmittance of 40% or higher, and the absolute value of transmittance is 10% or smaller requirement.

当tb≤18时,ta<12当18<tb≤22时,ta≤10,和当22<tb≤30时,ta≤32表3还示出,通过一种记录层和反射层都较薄时的配置,可以取得一种符合所述条件的平均透射率和透射比的配置。 When tb≤18 time, ta <12 When 18 <tb≤22 time, ta≤10, and when 22 <tb≤30, ta≤32 Table 3 also shows, by a recording layer and reflective layer are thin when the configuration may be configured to obtain one kind satisfies the condition of the average transmittance and the transmittance. 这就是说,第1信息层2中的光吸收层主要是记录层和反射层。 That is, the first information layer of the light absorbing layer 2 are mainly the recording layer and reflective layer. 再进一步解释为,因为从光源一方来观察,记录层比反射层近,记录层的吸收指数就大于反射层的吸收指数,记录层薄膜厚度的提高要比反射层薄膜厚度的提高对透射率的影响更大。 As further explained, since the light source viewed from one side, near the recording layer than the reflective layer, the absorption index of the recording layer on the reflective layer is greater than the absorption index, improving the film thickness of the recording layer film thickness than the reflective layer to improve the transmittance greater impact.

当对光盘1和3就记录层在非结晶状态的吸收指数Aa值和记录层在结晶状态的吸收指数Ac值进行计算时,结果为Aa>Ac。 When a value is absorption index Aa of the recording layer in the amorphous state of the optical disk 3, and calculated values ​​and absorption index Ac of the recording layer in the crystalline state, the result is Aa> Ac. 这是因为,由于光盘1和3的反射率设定为Ra<Rc所致,为了降低透射比的绝对值(即,基本上Tc和Ta相等),通过对记录层的吸收指数给予一定关系Aa>Ac(≤100%-反射率-透射率),可更容易地得出一种配置。 This is because the reflectance of the optical disk 1 and 3 is set to Ra <Rc caused to decrease the absolute value of the transmittance ratio (i.e., substantially equal to Tc and Ta), by absorption index of the recording layer to give a certain relationship Aa > Ac (≤100% - reflectivity - transmittance) can be more easily derived one configuration. 相反地,如在光盘2情况中,反射率成为Ra>Rc,通过对记录层吸收指数给予一定关系Aa<Ac,就可容易地获得能满足所述要求的配置。 In contrast, as in the case where the optical disc 2, the reflectance becomes Ra> Rc, Aa <Ac, obtained can be easily configured to meet the requirements of the recording layer by absorption index given a certain relationship. 由于Aa和Ac的相对幅度随着组成信息层的各个薄膜的光常数和厚度而变化,如果记录薄膜在非结晶状态时的光常数定为na-ika,而在结晶状态时的光常数为nc-ikc,而令记录薄膜的吸收指数为Aa>Ac,反射率为Ra<Rc时,就可容易地获得一种Tc和Ta基本上相等的配置,其中na+ka>nc+kc。 Since the relative amplitudes Aa and Ac are each as optical constants and thickness of thin film layer varies composition information, if the recording film when the optical constant of the amorphous state as na-ika, crystallization and light constant state of nc -ikc, so that the recording film is absorption index Aa> Ac, the reflectance of Ra <Rc time, can be easily obtain a Tc and Ta are substantially identical configuration, wherein na + ka> nc + kc.

相反,当na+ka<nc+kc时,通过让Aa<Ac作为记录薄膜的吸收指数,和Ra>Rc作为反射率,可更容易地取得一种Tc和Ta基本上相等的配置。 In contrast, when na + ka <When nc + kc, by having Aa <Ac as the absorption indices of the recording films and Ra> Rc as the reflectance can be more easily strike a Tc and Ta are substantially equal configuration.

顺便说说,当该实施例的记录层具有关系为na+ka>nc+kc,通过Aa>Ac作为记录层薄膜的吸收指数,Ra<Rc作为反射率,就可更容易获得Tc和Ta基本上相等的配置。 Incidentally, when the recording layer of this embodiment has an absorption index relationship na + ka> nc + kc, by Aa> Ac film as the recording layer, Ra <Rc as the reflectance can be more readily obtained substantially Tc and Ta on an equal configuration.

综上所述,不论光常数如何,较理想的是,在非结晶状态中与Ra和Rc相对幅度相匹配的相对幅度Ta和Tc和在结晶状态中与Ra和Rc相对幅度相匹配的相对幅度Ta和Tc是不同的。 In summary, regardless of the optical constants, it is desirable that, in the amorphous state and Ra and Rc are matched to the relative amplitude and relative amplitude Ta and Tc in the crystalline state and Ra and Rc are matched relative amplitude relative amplitude Ta and Tc are different.

就上所述,在本实施例的光信息记录媒体中。 On the optical information in the present embodiment of the recording medium. 通过为第1信息层2降低透射比(Tc-Ta)/Tc的绝对值为10%或更少些,提高平均透射率(Ta+Tc)/2为40%或更多些,就能使激光光束具有足够的光强到达第2信息层3,信息可精确地记录下来,不管在第1信息层2上有否记录信息。 By the first information layer 2 to reduce the transmittance (Tc-Ta) / Tc in absolute value of 10% or less, any rise in the average transmittance (Ta + Tc) / 2 of 40% or more of these, can make the laser beam having sufficient intensity reaches the second information layer 3, information can be precisely recorded, regardless of whether the information recorded on the first information layer 2.

图5是截面图,示出第1信息层2的配置实例,从激光光束入射方来观察的话,此信息层成为图1中较近的信息层。 5 is a sectional view showing a configuration example of the first information layer 2, the laser beam is incident from the side viewed, then the information layer becomes nearer information layer in FIG. 1. 这种方式不同于第1实施例,不同方面是在反射层12上设有第3介质层13。 This embodiment differs from the first embodiment, is provided with various aspects of the third dielectric layer 13 on the reflective layer 12. 图6绘出了平均透射率(Ta+Tc)/2和透射比(Tc-Ta)/Tc的变化,其中记录层厚度设定为10nm,反射层厚度设定为10nm,第3介质层厚度设定为10nm,第1介质层薄膜厚度和第2介质层的薄膜厚度是可变的。 Figure 6 depicts the average transmittance (Ta + Tc) / 2 and a transmittance (Tc-Ta) / Tc changes, wherein the recording layer thickness is set to 10 nm, the reflective layer thickness is set to 10 nm, the thickness of the third dielectric layer is set to 10nm, film thickness of the first dielectric layer and the film thickness of the second dielectric layer is variable. 把图6与图4相比,虽然记录层已扩大了透射比(Tc-Ta)/Tc的绝对值为10%或更小些的区域。 Compared with FIG. 6 to FIG. 4, although the expanded recording layer has a transmittance (Tc-Ta) / Tc is 10% of the absolute value or smaller areas. 又,如果第3介质层厚度选择得合适,则有可能提高平均透射率。 Further, if the thickness of the third dielectric layer is selected to be appropriate, it is possible to enhance the average transmittance. 这样就提高了第1信息层2配置的自由度。 This increases the degree of freedom of the first information layer 2 is arranged.

表4示出本实施例试生产的光盘的第1信息层2的厚度配置例子,计算3在非结结晶状态的透射率(Ta)和在结晶状态的透射率(Tc),在非结晶状态的反射率(Ra)和在结晶状态的反射率(Rc),非结晶状态(Aa)和结晶状态(Ac)的吸收率,在非结晶状态和结晶状态之间的透射比(Tc-Ta)/Tc和平均透射率(Ta+Tc)/2。 Table 4 shows the present first information layer of Example preproduction disc thickness 2 configuration example embodiment, is calculated 3 the transmittance in the non-junction amorphous state (Ta) and the transmittance in the crystalline state (Tc), the amorphous state in reflectance (Ra) and the reflectance in the crystalline state (Rc of), the amorphous state (Aa) and the crystalline state (Ac) absorption, transmittance ratio between the amorphous state and the crystalline state (Tc-Ta) / Tc, and average transmittance (Ta + Tc) / 2.

(表4) (Table 4)

在此实例中,如表4所示,通过改变记录层厚度ta,反射层厚度tb,第1介质层厚度t1,第2介质层厚度t2和第3介质层厚度t3来制备第1信息层2的不同的透射比和平均透射率的光盘。 In this example, as shown in Table 4, the recording layer by changing the thickness TA, TB reflecting layer thickness, first dielectric layer thickness t1, the thickness t2 of the second dielectric layer and the thickness t3 of the third dielectric layer to the first information layer 2 is prepared the different transmission ratios and average transmittance of the disc.

以与第1实例的同样方法制备这些光盘,但与第1实例在下列方面有所不同。 In the same manner as the first optical disc was prepared in the Example 1, Example 1 but differs in the following aspects. 作为第1信息层2,由下列各层陆续形成:ZnS-SiO2第3介质层为t3nm,AgPaCu反射层为tbnm,ZnS-SiO2第2介质层为t2nm,GeSbTe记录层为tanm和ZnS-SiO2第1介质层为t1nm。 As the first information layer 2 is formed of the following layers in succession: ZnS-SiO2 dielectric layer is a third t3nm, AgPaCu reflective layer tbnm, ZnS-SiO2 dielectric layer is a second t2nm, GeSbTe recording layer of ZnS-SiO2 and tanm dielectric layer t1nm.

然后,使用图3所示的6种不同光盘进行记录/再现测试。 Then, 6 different optical disc shown in FIG. 3 for recording / reproducing tests. 如在第1实例中,每1光盘以5m/s线性速度旋转,不论光盘的信息层2或3都由半导体激光光束加以照射,光束波长为405nm,利用数值孔径为0.85的物镜进行缩小。 As in Example 1, each of the optical disc 1 to 5m / s linear velocity rotation, regardless of the information layer of the optical disc 2 or 3 to be irradiated by a semiconductor laser beam, a light beam having a wavelength of 405nm, an objective lens for reduction of the numerical aperture of 0.85.

包络线变化率和误差率的测量结果示于表5。 Measurements envelope change rate and the error rate are shown in Table 5.

(表5) (table 5)

光盘7至9给出令人满意的误差率,误差率低于一般所接受的门限1×10-4,光盘10至12的误差率不够低。 Disc 7-9 give a satisfactory error rate, error rate lower than the generally accepted threshold 1 × 10-4, the error rate of the optical disk 10 to 12 is not sufficiently low. 光盘7至9和11的包络线变化率是满意的,不大于5%,但光盘10和12的误差率大于5%。 Envelope variation of the disk 7-9 and 11 are satisfied, not more than 5%, the error rate of the optical disk 10 and 12 is greater than 5%.

当在由二进制化电路,PLL电路组成的再现信号处理电路中测量从各光盘的第2信息层所重现的信号时,光盘11,12在二进制化电路运作中不稳定,因为它们的包络线波动大,说明误差率较高。 When the signal processing circuit in the reproduction signal by the binarizing circuit, the PLL circuit is measured from the second information layer of each optical disc being reproduced, the optical disk 11 in the binarizing circuit operation is unstable, because of their envelope line fluctuations, indicating a higher error rate. 光盘10至12在PLL电路运作中也不稳定,这是由于误差率提高而招致再现信号的质量欠缺所造成的。 The optical disk 10 to 12 in the PLL circuit is not stable in operation, which is due to increase the error rate incurred by the lack of quality of the reproduced signal caused.

示于图4,图5的结果揭示,当透射比的绝对值不大于10%和平均透射率不小于40%时,可获得足够低的误差率。 Shown in FIG. 4, FIG. 5 reveals the results, when the absolute value of the transmittance is not more than 10% and the average transmittance of not less than 40%, sufficiently low error rate can be obtained.

从这些发现来看,大家知道,因为光盘7至9的第1信息层2的平均透射率(Ta+Tc)/2提高至40%或更多些,而透射比(Tc-Ta)/Tc的绝对值又了降低至10%或更低些,所以信息可以满意地记录在第2信息层3,或从该层满意地再现出来。 From the point of view of these findings, we know, because the first information layer optical disc 7 to 9 average transmittance (Ta + Tc) / 2 increased to 40% or more of these two, and the transmittance (Tc-Ta) / Tc and the absolute value reduced to 10% or lower, the information can be satisfactorily recorded on the second information layer 3, the layer or out satisfactorily reproduced.

又,在图5所示的配置中,能使平均透射率(Ta+Tc)/2上升到40%或更多些和使透射比(Tc-Ta)/Tc绝对值下降至10%或更低些的薄膜厚度条件是由详细计算来检查的。 Further, in the configuration shown in Figure 5, enables the average transmittance (Ta + Tc) / 2 raised to some 40% or more and the transmittance ratio (Tc-Ta) / Tc to decrease an absolute value of 10% or less these conditions of low film thickness is calculated to check details.

表6示出,当记录层薄膜厚度ta在2至32nm中变化,以及反射层薄膜厚度tb在2至36nm中变化时,无论第1信息层2是否有潜力来保持平均透射率(Ta+Tc)/2在40%或更高些,透射比的绝对值(Tc-Ta)/Tc在10%或更低些是可在配置。 Table 6 shows, when the recording layer film thickness ta 2 to changes 32nm, and a reflective layer of the film thickness tb at 2 to change 36nm, whether the first information layer 2 whether there is the potential to keep the average transmittance (Ta + Tc ) / 2 of 40% or higher, the absolute value of (Tc-Ta) transmittance / Tc of 10% or lower is in the configuration. 图7示出记录层薄膜厚度和反射层薄膜厚度同样变化时的情况,第3介质层薄膜厚度设定为30nm,表8是厚度为50nm的情况,表9为厚度为70nm的另一种情况。 Figure 7 shows a case where the same film thickness change of the recording layer and the reflection layer film thickness, the film thickness of the third dielectric layer is set to 30 nm, a thickness of the table 8 in the case of 50nm, a thickness of the table 9 is another case of 70nm .

(表6) (Table 6)

(表7) (Table 7)

(表8) (Table 8)

(表9) (Table 9)

这些表揭示,如果记录层做成ta[nm]厚度,金属反射层做成tb[nm]厚度,和第3介质层的薄膜厚度在10和70nm之间,则满足下述条件的薄膜厚度就能提供符合所述要求的平均透射率和透射比的配置。 These tables reveal, if the recording layer is made ta [nm] thickness, the film thickness of the metal reflective layer made of tb [nm] thickness of film, and the third dielectric layer is between 10 and 70nm, is to satisfy the following condition providing average transmittance conforms to the requirements and configuration of the transmission ratio.

当tb≤18时,ta≤12当16<tb≤18时,ta≤38-tb当18<tb≤20时,ta≤10当20<tb≤24时,ta≤30-tb和当24<tb≤26时,ta≤28-tb从表6至表9可以看出,利用一种记录层和反射层都为较薄的配置,可获得平均透射率和透射比符合所述要求的一种配置。 When tb≤18 time, ta≤12 when 16 <tb≤18 time, ta≤38-tb when 18 <while tb≤20, ta≤10 when 20 <while tb≤24, ta≤30-tb and when 24 < when tb≤26, ta≤28-tb as can be seen from tables 6 to 9, using a recording layer and reflective layer are configured to be thinner, and one average transmittance transmittance obtained conforms to the requirements of the configuration. 这说明第1信息层2中具有光吸收层作用的主要是记录层和反射层。 This shows that the first information layer 2 having the light absorbing layer acting mainly the recording layer and the reflective layer.

对光盘7至9进行记录层在非结晶状态时吸收指数值Aa和记录层在结晶状态时吸收指数值Ac的计算,结果是Aa>Ac。 The optical disc recording layer 7-9 when the absorption index value Aa in the amorphous state of the recording layer and the absorption index Ac value calculation in the crystalline state, the result is Aa> Ac. 这是因为由于光盘7至9的反射率设定为Ra<Rc,为了降低透射比的绝对值(即,基本上Tc和Ta相等),通过给记录层的吸收指数一种关系Aa>Ac,就可更容易地得到一种配置(≤100%-反射率-透射率)。 This is because the reflectance of the optical disc 7 to 9 is set to be Ra <Rc, in order to reduce the absolute value of the transmittance ratio (i.e., Ta and Tc are substantially equal) to the recording layer by a relationship of the absorption index Aa> Ac , you can more easily obtain a configuration (≤100% - reflectivity - transmittance).

如上所述,如果该实施例中的光信息记录媒体被配置成将透射比(Tc-Ta)/Tc的绝对值减小到10%或更低,并将平均透射率(Ta+Tc)/2提高到40%或更高,则足够的激光光束的光强可到达第二信息层3,且信息可精确地记录或再现,不管信息是否记录在第一信息层2中。 As described above, if the optical information recording medium of this embodiment is configured to an absolute value of the transmittance ratio (Tc-Ta) / Tc is reduced to 10% or less, and average transmittance (Ta + Tc) / 2 to 40% or higher, sufficient light intensity of the laser beam can reach the second information layer 3, and the information can be accurately recorded or reproduced, regardless of whether or not the information recorded in the first information layer 2.

最后,由于所述透射率Ta和Tc一般由光学仪器如分光仪来测得,故通过利用对第2信息层由信息再现的激光光束照射所获得的再现信号,就可方便地测量Tc和Ta之间的差别。 Finally, since the transmittance Ta and Tc generally be measured by the optical instrument such as a spectrometer, by using the reproduction signal so that the laser beam is irradiated by the second information layer is reproduced on the information obtained, it can be conveniently measured Tc and Ta the difference between. 如图7所示。 As shown in FIG. 参照附图,再现说明此类光测法。 Referring to the drawings, illustrate such a reproduction optical method.

图9是本发明第一光测法的示意图,图9上面部分组成激光光束如何照射至各信息层的示意图,下面部分是从由第2信息层反射的激光光束中所取得的再现信号波形图。 9 is a schematic of a first optical method of the present invention, a reproduction signal waveform obtained from the laser beam reflected by the second information layer, the laser beam is irradiated to what constitutes a schematic diagram of the respective information layers, the upper part of the lower portion in FIG. 9 .

(步骤1)首先,在第1信息层没有东西被记录的状态中,如图9上面部分所示,进行激光光束照射,聚焦于第2信息层。 (Step 1) First, the first information layer is not recorded in the state of things, as shown in Figure 9 an upper portion, a laser beam is irradiated, it focused on the second information layer. 较理想的是,照射位置在此过程中应设定在“静止”的状态,如转满一圈后,又返回至原来位置,因为,这样的话,与下一步的测量结果进行比较就方便了。 It is desirable that the irradiation position in the process should be set in the "stationary" state, such as a full circle after the turn, and returns to the original position, since, in this case, for comparison with the measurement result of the next step to facilitate the . 使用光测计把反射的光强转换为电流或电压,以便再现信号之类,可观察到基本是直流再现波形,如图9a下面部分所示。 Using a light meter measuring the intensity of reflected light is converted to current or voltage, so that the reproduction signal or the like, can be observed substantially DC reproduced waveforms as shown in the lower part 9a. 虽然实际的波形有些不平整,这是光盘反射率之类引起的波动,当在时间上加以平均,它可认为是直流波形。 Although the actual waveform is somewhat uneven, the class which is the fluctuation of reflectance caused by the optical disk, when averaged over time, it may be considered a DC waveform. 当光盘离开激光光束的光通路时,此图纵轴上零电平表示光测计输出。 When the optical disk out of the light path of the laser beam, this figure the vertical axis represents the zero level of the optical output altimeter. 因此,示于图中的电平Sa表示处在第1信息层没有东西记录的状态时反射的光强。 Thus, shown in Figure Sa represents a level in the first information layer is not reflected light intensity recorded in the state of things.

(步骤2)其次,随机信号或单调信号记录在紧接着在步骤1测量sa位置下面的第1信息层的位置上,如图9b上面部分所示。 (Step 2) Next, random signals or monotone signals are recorded at a position immediately following the first information layer was measured sa position of the following steps 1, 9b upper portion as shown in FIG. 当激光光束聚焦在第2信息层上时,规定的记录范围包括激光通过第1信息层的整个区域。 When the laser beam is focused on the second information layer, recording a predetermined range including a laser through an entire area of ​​the first information layer. 如果激光光束波长为405nm,物镜的NA是0.85,中间层厚度为30nm,中间层反射率为1.60,则第1信息层的激光光束直径约为37.6nm。 If the laser beam having a wavelength of 405nm, the NA of the objective lens is 0.85, the intermediate layer having a thickness of 30 nm, the laser beam diameter was 1.60 reflecting intermediate layer, the first information layer is about 37.6nm. 利用此直径和考虑到第1和第2信息层之间的偏心度,要求的记录范围可能是200nm左右。 With this diameter and considering the eccentricity between the first and second information layer, the required recording range may be around 200nm.

(步骤3)最后,进行激光光束照射,通过已有随机信号或单调信号记录的第1信息层,聚焦在第2信息层上,如图9c的上面部分。 (Step 3) Finally, a laser beam is irradiated, the first information signal layer existing random or monotone signals are recorded, and focused on the second information layer, the upper portion 9c of FIG. 较理想的是,为了更精确地测量,照射位置随后应与步骤1时测量的踪迹相重叠。 It is desirable that, in order to more accurately measure, the irradiation position of the trace to be followed by 1:00 measuring step overlap. 观察到的反射的光强基本上是直流再现波形,如图9c下面部分所示。 Reflected light intensity observed reproduction waveform is substantially a DC, 9c lower portion as shown in FIG. 示于图中的电Sb表示第1信息层中记录的反射的光强。 Shown in Figure Sb represents the intensity of the electrical first information recording layer is reflected. 此图示出一种情况,即透射率在记录状态中要低于在未记录的状态中。 This figure shows a case in which the transmittance in the recording state is lower than in the unrecorded state.

(步骤4)根据Sa和Sb,通过下列计算就可算出第1信息层在未记录状态和在记录状态之间的透射率的差异。 (Step 4) the difference in the state of the first information layer and the transmittance between the unrecorded state in the recording according to Sa and Sb, can be calculated by the following calculation. 其中α是记录记号的面积与激光光束在第1信息层部分上的激光光束的整个截面积之比,记录的第1信息层的等效的透射率Ta'是:Ta'=(1-α)Tc+αTa=Tc-α(Tc-Ta)因为未记录的第1信息层的透射率保持为Tc,根据Sa和Sb的测量,激光光束由第1信息层透射2次。 Where [alpha] is the ratio of the whole area of ​​the recording marks the laser beam on the first information layer portion of the laser beam cross-sectional area, the equivalent transmittance of the first information recording layer of Ta 'is: Ta' = (1-α ) Tc + αTa = Tc-α (Tc-Ta) since the transmittance of the first information layer remains Tc of the unrecorded, based on the measurement of Sa and Sb, the laser beam from the first information layer 2 transmission times. 下面方程式成立:Sb/Sa=(Ta'/Tc)2这二个方程式说明所述的透射比可由下式获得:(Tc-Ta)/Tc=(1-(Sb/Sa)1/2)/α…方程式(1)其中α值通常约为0.25,但它会根据包括记录功率的记录条件而变化。 The following equation is established: Sb / Sa = (Ta '/ Tc) 2 These two equations illustrate the transmittance obtained by the following formulas: (Tc-Ta) / Tc = (1- (Sb / Sa) 1/2) / α ... equation (1) where [alpha] is typically about 0.25, but it varies depending on the recording conditions including a recording power.

通过步骤1至步骤4,可方便测得第1信息在未记录状态中和在已记录状态中的透射率的变化,不需要使用专用的测量仪表。 By steps 1 through 4, can be easily measured in the first information is not the state change of the transmittance in the recorded state, and recording, without the use of special measuring instruments.

图10是示意图,示出第2光测法的过程,在图中,上面部分为示出激光光束如何照射至各信息层的示意截面,下面部分是从由第2信息层所反射的激光光束中取得的再现信号的波形图。 FIG 10 is a schematic process diagram illustrating a second optical measuring method, in the figure, the upper part shows how the laser beam is irradiated to a schematic cross section of the respective information layers, the lower portion from the laser beam by a second information layer, the reflected light beam a reproduction signal waveform diagram obtained.

(步骤1)首先,在第1信息层没有东西记录的情况下,如图10a上面所示,进行激光光束照射,聚焦在第2信息层上,随机信号和单调信号记录在第2信息层的预先确定的轨迹上。 (Step 1) First, the first information layer is not recorded what the case, as shown in FIG. 10a above, a laser beam is irradiated, focused on the second information layer, and a random signal monotone signals are recorded in the second information layer, on a predetermined trajectory. 然后,利用再现级别的激光光束照射至记录于该轨迹的信号上,通过光测计之类仪表,转换为电流或电压,观察具有固定幅度的包络线波形,如图10a下面部分所示。 Then, the laser beam is irradiated to a level of the reproduction signal recorded on the track, by a light meter measuring instrument or the like, converted to a current or voltage is observed envelope waveform having a fixed amplitude, 10a as shown in the lower part of FIG. 示于图中的幅度A1表示在第1信息层没有东西记录状态时的再现信号幅度。 Shown in Figure A1 represents the amplitude of the reproduction signal amplitude when nothing is recorded in the state of the first information layer.

(步骤2) (Step 2)

其次,随机信号和单调信号记录在紧接于在步骤1测量A1的位置的下面的第1信息层的位置上,如图10b上面部分所示。 Next, random signal and a monotone signal is recorded at a position next to the first information layer following the step of measuring a position A1 on a, 10b as shown in the upper part of FIG. 记录范围与按照第1光测法的范围相同。 The same recording range according to the range of the first optical method.

(步骤3)最后,进行激光光束照射,通过记录过随机信号的第1信息层,聚焦在第2信息层上,如图10c上面部分所示。 (Step 3) Finally, the laser beam is irradiated, by the information layer through the first recording random signals, is focused on the second information layer, 10c upper portion as shown in FIG. 使照射的位置与步骤1测量的轨迹相重迭。 The irradiation step with a track position measuring phase overlap. 观察到作为再现信号的,具有固定幅度的包络线波形,如图10c下面部分所示。 As the reproduction signal is observed, an envelope waveform having a fixed amplitude, 10c the lower portion as shown in FIG. 图中示出的幅度A2表示在第1信息层的记录状态中的再现信号幅度。 FIG amplitude A2 shown in the reproduction signal amplitude indicates recording state of the first information layer in. 此图也示出第1信息层在记录状态中的透射率要比在未记录状态中的低。 This figure also shows the transmittance of the first information recording layer than in the low state in the unrecorded state.

(步骤4)根据第1光测法所示的计算中,以A1代替Sa,以A2代替Sb,可计算出第1信息层的未记录状态和记录状态之间的透射比(Tc-Ta)/Tc。 (Step 4) The computing method shown in the first photodetector in order to place Sa A1 to A2 instead of Sb, calculated transmittance between the unrecorded state and the recorded state of the first information layer (Tc-Ta) / Tc.

通过步骤1至步骤4,可方便地测得第1信息层在未记录状态中和已记录状态中的透射率的变化,不需要使用特定的测量仪表。 By steps 1 through 4, may conveniently be determined in the first information layer does not change the transmittance state and the recorded state, without the use of special measuring instruments record. 同时,因为参照图10所描述的方法使用再现幅度A1和A2来与反射的光强级进行比较,即使来自第1信息层的部分反射光束散射并入射至光测计上,当测量幅度时,因为散射光是可取消的,所以能测得精度较高的透射率的差异。 Meanwhile, since the reference to the method described in FIG. 10 using the reproduction amplitude and A2 to compare A1 and the reflected light intensity level be, even if part of the reflected light beam scattered from the first information layer and incident on the light sensing meter, when measuring the amplitude of the time, since scattered light is canceled, so that the accuracy of the measured difference can be a high transmittance. 另一方面,通过参照图9所述的方法,如果光测计量值足够小,如散射光强被抑制至总的入射光强的2%左右,则测得的透射率差异的容差将抑止在2/100,这样可使测量精度足够精确。 On the other hand, by the method described with reference to FIG. 9, if the light metered value measured is sufficiently small, such as intensity light scattering intensity is suppressed to about 2% of the total incident light, the tolerance of the transmittance difference measured will suppress in 2/100, it will give accurate enough measurement precision.

对于本发明的第二光测法,如图11所述,第一信息层记录状态和未记录状态之间的透射比(|Tc-Ta|/Tc)可用这种方式获得,其中检测调制幅度零电平和上包络之间的差值A1'和A2',并且在第一光测法所述的计算中,Sa用A1'替代,Sb用A2'替代。 For the second optical method according to the present invention, as shown in FIG 11, the transmittance of the first information layer between the recorded state and an unrecorded state (| Tc-Ta | / Tc) obtained in this manner can be used, which detect the modulation amplitude level and the difference between the upper envelope of A1 'and A2', and calculates the first photometric method, Sa with A1 'Alternatively, Sb with A2' substitute zero.

通过所述的光测法,通过方程式1可方便地算出透射比。 By the optical method, the transmittance ratio can be easily calculated by Equation 1. 因为理想的第1信息层的透射比为10%或更小些,如果使用方程式1,通过第1光测法满足下列要求,就可获得满意的Sa和Sb:0≤|1-(Sb/Sa)1/2|≤0.1α或采用第2光测法满足下列要求,也可取得满意的A1和A2:0≤|1-(A2/A1)1/2|≤0.1α Because the transmittance over the first information layer is 10% or smaller, if using Equation 1, the following requirements by the first optical method, you can be satisfied Sa and Sb: 0≤ | 1- (Sb / Sa) 1/2 | ≤0.1α or using the second optical method satisfies the following requirements, can achieve a satisfactory A1 and A2: 0≤ | 1- (A2 / A1) 1/2 | ≤0.1α

此外,在上述模式的媒体中,虽然第一信息层2可配置为图2所示的4层,或图5所示的5层,但也能使用一种在这些多层中相粼对之间没有交接层的多层结构配置,如果这种结构能满足有关透射比和/或平均透射率等所述条件,则也可行。 Further, in the medium of the mode, although the first information layer 2 may be configured as shown in FIG. 4 layers or 5 layers as shown in FIG. 5, but can also use one of these multilayer relative to the Lin no inter-layer transfer of the multilayer structure is disposed, said structure able to meet this condition if the relevant transmittance and / or the average transmittance and the like, are also possible. 除了图2和图5的配置外,一些不设反射层的配置也可应用。 In addition to the configuration of FIG. 2 and FIG. 5, a number of no reflecting layer is disposed may be applied. 个别层的材料也不限于这些实施方式中所采用的材料。 Individual material layer is not limited to these embodiments material employed.

在所述方式的实施中,每个光盘有2个信息层,若每个光盘有3个或更多信息层,这也可接受的,如图8所示,但要使比离开激光光束入射方最远的信息层较为近的信息层能满足有关透射比的所述要求。 In the embodiment of the embodiment, each disc has two information layers, if each disk has three or more information layers, it is also acceptable, as shown in FIG. 8, but to make the laser beam is incident than leave side farthest information layer of the information layer is more nearly satisfy the requirements for the transmittance.

综合透射率是各信息层透射率的积。 Comprehensive transmittance is the product of the transmittance of each information layer. 根据各个信息层的记录的和未记录的状态的组合,存在一个其综合透射率处于最小值的状态(此透射率由Tmin表示),和其综合透射率处于最大值的状态(此透射率由Tmax表示)。 The composition of each information recording layer and the unrecorded state, which exists a comprehensive state transmittance at a minimum (Tmin represents this transmission rate), which is integrated, and at a maximum transmittance state (the transmission rate Tmax representation). 与2个信息层的情况相似,为了减少激光光束光强在到达比其他多个信息层较为远的1个信息层时的变化,配置应为:0≤|Tc-Tmin|/Tc≤0.1和0.1≤|Tc-Tmax|/Tc≤0.1其中Tc是多个信息层的每个信息层都在未记录状态时的综合透射率。 In the case of two information layers is similar, in order to reduce variations in laser beam intensity reaching far more than the other one of the plurality of information layers of the information layers, should be arranged: 0≤ | Tc-Tmin | /Tc≤0.1 and 0.1≤ | Tc-Tmax | /Tc≤0.1 wherein the integrated transmittance Tc of each information layer in the plurality of information layers are not recorded state.

在这情况下,因为所有较近位置的信息层没有必要保持平均透射率为40%或更高些,所以必须提高再现电路的信噪比(S/N),保证足够的信号质量。 In this case, since all the information layer is not necessary to maintain a position close to the average transmittance of 40% or higher, it is necessary to improve the SNR of the reproducing circuit (S / N), to ensure adequate signal quality.

在所述光测法中,被检测的媒体可以是3层或更多信息层。 In the optical method, the medium may be detected by three or more information layers. 在此情况下,通过分别检测情况a和情况b各自的反射量,就可检测出较近的多层信层的透射率的最大变化。 In this case, by separately detecting the case where a and b are each amount of reflection, it can detect the maximum change in the transmittance of the multi-layered layer closer. 这儿情况a是指位于比离开激光光束入射方最远信息层较为近的多个信息层综合透射率取最小值。 Here refers to the case of a relatively located nearer than the farthest away from the laser beam incident side the information layer of the plurality of information layers integrated transmittance takes a minimum value. 情况b是指位于比离开激光光束入射方最远信息层较为近的多个信息层综合透射率取最大值。 B refers to the case than the maximum value located away from the laser beam incident side the information layer farthest integrated transmittance of more nearly plurality of information layers.

并且,在上述光测法中,在步骤4中根据测出的Sa(或A1、A1')和Sb(或A2、A2')计算透射比。 Further, in the optical measuring method, in the step 4 according to the measured Sa (or A1, A1 ') and Sb (or A2, A2') is calculated transmittance. 另外,提高检测这些测出值的变化,较近位置的信息层的透射率的变化也可以容易地获得,而无需测量透射比。 Further, to improve the detection of these measured values ​​change, change in the transmittance of the information layer closer position may be easily obtained without measuring the transmittance.

例如,作为表示信号变化的参数,定义(Sa-Sb)/Sa或(A1-A2)/A1或(A1'-A2')/A1'。 For example, a signal indicating a change in the parameter definition (Sa-Sb) / Sa or (A1-A2) / A1 or (A1'-A2 ') / A1'. 通过获得这些参数,较近信息层对最远信息层上再现信号质量的影响被消除,且无需获得透射比(Tc-TA)/Tc。 By obtaining these parameters, influence near the reproduction signal quality information layer farthest information layer is eliminated, and without obtaining transmittance (Tc-TA) / Tc. 然后,较近信息层的透射率变化可容易地判断。 Then, the transmittance of the nearer information layer changes may be easily determined.

在实际测量条件下,由于盘片反射率的不均衡等因素,Sa(或A1、A1')和Sb(或A2、A2')会变化,然而较近信息层的透射率变化对参数的变化影响最大。 Under actual measurement conditions, since the imbalance of the disc reflectance and other factors, Sa (or A1, A1 ') and Sb (or A2, A2') vary, but the transmittance of the nearer information layer varies to change the parameters most influential.

因此,即使通过记录较近信息层上的本地信号,测量最远信息层的反射光束变化量并检测最大值Sa和最小值Sb来获得上述参数,也不影响判断较近信息层的透射率变化。 Accordingly, even near a local signal on the information layer by recording, measuring changes in the amount of reflected light beam the farthest information layer, and detects the maximum value Sa and the minimum value Sb to obtain the above parameters, the change does not affect the transmittance of the information layer closer Analyzing . 对于调制幅度A1、A1'、A2、A2',也是一样。 The modulation amplitude A1, A1 ', A2, A2', is the same.

又,可用于上这实施方式中的调制系统和记录密度不限于所述的方式,但不用说,对媒体本身或记录/再现装置,它能取任何合适的形式。 Further, this embodiment can be used in the embodiment of the modulation system and recording density is not limited to the embodiment, but needless to say, the media itself or the recording / reproducing apparatus, which can take any suitable form.

就上所述,本发明中的光信息记录媒体能使足够的激光光束的光强到达较远的里面的信息层,并能精确地记录在较远的信息层上,或从该层再现出来,不论在较近的信息层上是否已记录任何信息。 On the optical information recording medium of the present invention enables a sufficient light intensity of the laser beam reaching the information layer farther inside, and can accurately be recorded on the information layer farther, or reproduced from the layer , regardless of whether any of the information recorded on the information layer closer.

又,本发明的光测法能在记录或未记录的情况下容易地检测较近信息层的透射率变化。 Further, the optical measurement method according to the invention can easily detect the transmittance of the nearer information layer in a case where the recording or change records.

Claims (2)

1.一种具有2个信息层的光信息记录媒体,激光光束集中照射至所述任一信息层,可使信息信号被记录或再现,其特征在于:位于比离开所述激光光束入射方最远的信息层较为近的1个信息层具有1个记录层,该记录层在二种可光检测状态之间变化,光信息记录媒体具有的配置为:0≤|Tc-Ta|/Tc≤0.1,且(Ta+Tc)/2≥0.4其中Tc是所述记录层在结晶态时所述较近位置的信息层的透射率,和Ta是所述记录层在非结晶态时的所述同一信息层的透射率,位于比离开所述激光光束入射方最远的信息层较为近的信息层至少具有第1介质层,相位变化记录层,第2介质层,金属反射层和第3介质层,所述各层从入射方向内排列的顺序为:所述第1介质层,所述相位变化记录层,所述第2介质层,所述金属反射层和所述第3介质层,所述激光光束波长在390nm至430nm范围内,和所述金属反射 An optical information having two layers of information recording medium is irradiated focused laser beam to any one of the information layer, the information signals can be recorded or reproduced, wherein: located at the most away from said laser beam is incident than the side far more information layers near an information layer including a recording layer, the recording layer changes between the two kinds of photo-detection state, the optical information recording medium having a configuration of: 0≤ | Tc-Ta | / Tc≤ 0.1, and a (Ta + Tc) /2≥0.4 wherein Tc is the recording layer in the crystalline state when the transmittance of the information layer closer to the position, and the Ta layer is in the amorphous state when the recording the transmittance of the same information layer, positioned away from said laser beam is incident than the farthest information layer side relatively close to the information layer having at least a first dielectric layer, a phase change recording layer, a second dielectric layer, a metal reflective layer and the third medium layer, said layers arranged in the order from the incident direction: a first dielectric layer, the phase change recording layer, said second dielectric layer, the metal reflective layer and the dielectric layer 3, the said laser beam having a wavelength in the range 390nm to 430nm, and said metal reflecting 至少由Ag或以Ag为主要成分的合金组成,具有的配置为:当tb≤18时,ta≤12当16<tb≤18时,ta≤38-tb当18<tb≤20时,ta≤10当20<tb≤24时,ta≤30-tb和当24<tb≤26时,ta≤28-tb其中ta[nm]是所述相位变化记录层的厚度,tb[nm]是所述金属反射层的厚度;并且Ac<Aa和Rc>Ra,其中Ac[%]是当所述相位变化记录层是结晶时位于比离开所述激光光束入射方最远的信息层较为近的信息层的所述相位变化记录层的吸收指数,Aa[%]是当所述相位变化记录层是非晶体的时候该层的吸收指数,和Rc[%]是当所述相位变化记录层是结晶的时候所述较近的信息层的反射率,Ra[%]是当所述相位变化记录层是非晶体时该层的反射率。 At least Ag or an alloy of Ag as a main component, has a configuration as follows: when tb≤18 time, ta≤12 when 16 <tb≤18 time, ta≤38-tb when 18 <tb≤20, ta≤ 10 when 20 <tb≤24 time, ta≤30-tb, and when 24 <tb≤26, ta≤28-tb where ta [nm] is the thickness of the phase change recording layer, tb [nm] is the the thickness of the metal reflective layer; and Ac <Aa and Rc> Ra, where Ac [%] when the phase change recording layer is located at the laser beam incident side of the crystalline information layer farthest information layer is thicker than the more recent leave absorption index of the phase change recording layer, Aa [%] when the phase change recording layer is an amorphous layer, when the absorption index, and Rc [%] when the phase change recording layer is crystalline when the closer the reflectance of the information layer, Ra [%] when the phase change of the reflectance layer recording layer is amorphous.
2.一种光信息记录/再现的方法,通过用激光光束照射如权利要求1所述的光信息记录媒体而记录或再现信息信号,其特征在于:通过用来自所述光信息记录媒体一侧的所述激光光束照射所述信息层中的1个,记录或重现信息信号。 An optical information recording method / reproducing of an information signal is recorded or reproduced by irradiating a laser beam with the optical information recording medium according to claim 1, characterized in that: by using the optical information recording medium from the side irradiating said laser beam in the information layer 1, recording or reproduction of information signals.
CN 02147334 2001-10-12 2002-10-14 Optical information recording medium, optical information recording/reproducing method CN1287360C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001314827 2001-10-12

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CNB2006101359017A Division CN100514452C (en) 2001-10-12 2002-10-14 Optical information recording medium and recording/reproducing method thereof

Publications (2)

Publication Number Publication Date
CN1412749A CN1412749A (en) 2003-04-23
CN1287360C true CN1287360C (en) 2006-11-29

Family

ID=4751190

Family Applications (2)

Application Number Title Priority Date Filing Date
CNB2006101359017A CN100514452C (en) 2001-10-12 2002-10-14 Optical information recording medium and recording/reproducing method thereof
CN 02147334 CN1287360C (en) 2001-10-12 2002-10-14 Optical information recording medium, optical information recording/reproducing method

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CNB2006101359017A CN100514452C (en) 2001-10-12 2002-10-14 Optical information recording medium and recording/reproducing method thereof

Country Status (1)

Country Link
CN (2) CN100514452C (en)

Also Published As

Publication number Publication date
CN1979649A (en) 2007-06-13
CN100514452C (en) 2009-07-15
CN1412749A (en) 2003-04-23

Similar Documents

Publication Publication Date Title
AU720280B2 (en) Optical recording medium and recording and reproducing method using the same
US6827999B2 (en) Optical information recording medium
CN1248201C (en) optical information recording method and regenerater
JP3250989B2 (en) Optical information recording medium, recording / reproducing method thereof, manufacturing method thereof, and optical information recording / reproducing apparatus
US6929840B2 (en) Optical recording medium, method for manufacturing the same and target used for sputtering process
TW476065B (en) Optical disk medium
US6846611B2 (en) Phase-change optical recording medium
US6469977B2 (en) Optical information recording medium, method for producing the same, and method and apparatus for recording/reproducing information thereon
CN1221952C (en) Optical information recording medium, information recording method and device using the medium
CN1149558C (en) Optical recording media and their production method
US6229785B1 (en) Optical information recording medium, its manufacturing method, optical information recording/reproducing method and optical information recorder/reproducer
KR100601239B1 (en) Information recording media, a method for recording/reproducing information, an apparatus for recording/reproducing information
US6456584B1 (en) Optical information recording medium comprising a first layer having a phase that is reversibly changeable and a second information layer having a phase that is reversibly changeable
EP1463045B1 (en) Optical recording medium, method for manufacturing the same and target used for sputtering process
US6822937B2 (en) Optical information medium
US7143426B2 (en) Multilayer optical recording medium with thickness ranges reducing interlayer cross-talk
CN1276420C (en) High-speed one-time writing-in optical recording medium, optical-recording method and apparatus
US5627817A (en) Optical disk data storage system with multiple write-once dye-based data layers
US7057252B2 (en) Optical information recording medium
US7002887B2 (en) Method of recording data in optical recording medium and an apparatus for recording data in optical recording medium
US5458941A (en) Optical recording medium exhibiting eutectic phase equilbria
JP4092147B2 (en) Optical recording medium and optical recording method
EP1158504B1 (en) Rewritable compact disk and method for manufacturing the same
AU2002219540B2 (en) Optical recording medium
US7167440B2 (en) Optical information recording medium

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20061129

Termination date: 20181014