摘要:
An optical information recording medium of the present invention includes a transparent substrate and a multi-layered film provided on the transparent substrate. The multi-layered film includes at least a recording layer that is changed between two or more different states capable of being detected by irradiation with a light beam, and a light absorbing layer in this order from a side close to the transparent substrate. The recording layer contains a material represented by a formula: Gex(BiySb1−y)2Tex+3 (where x≧5 and 0
摘要翻译:本发明的光学信息记录介质包括透明基板和设置在透明基板上的多层膜。 多层膜至少包括在能够通过照射光束而被检测的两种以上的不同状态之间变化的记录层和从靠近透明基板的一侧开始的光吸收层。 记录层包含由下式表示的材料:Ge x x x>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> (其中x> = 5和0
摘要:
An optical information recording medium is provided which has favorable signal quality even in high density recording using a translucent information layer. The optical information recording medium includes one or more information layers including a recording layer for recording/reproducing an information signal by irradiation with a laser light, and a separating layer or a protective substrate on which a first information layer of the information layer on the irradiation face side is formed, the separating layer or the protective substrate having a guide groove spirally or concentrically formed on the surface, and the respective inclined planes on the inner perimeter side and the outer perimeter side of the guide groove having inclined angles α and β with respect to the bottom face of the guide groove. The guide groove has one or more dissymmetric regions in the radius direction where the inclined angles α and β are different. The information layer has roughly agreeing thicknesses in the inclined face portion on the inner perimeter side and in the inclined face portion on the outer perimeter side in the dissymmetric region.
摘要:
The optical information recording medium of the present invention includes an information layer provided on a substrate. The information layer includes: a recording layer with respect to which information can be recorded and reproduced through irradiation with a laser beam having a predetermined wavelength; a first protective layer that is located, with respect to the recording layer, on the side to which the laser beam is incident; and a second protective layer that is located, with respect to the recording layer, on the opposite side to the side to which the laser beam is incident. The refractive index n1 of the first protective layer and the refractive index n2 of the second protective layer at the predetermined wavelength of the laser beam that is used for recording and reproduction satisfy a relationship of n2
摘要:
An optical information recording medium of the invention has at least two information layers. A first information layer (100) disposed at the front side (viewed from a laser incident side) includes at least a reflection layer (3), a recording layer (6) disposed at the laser incident side with respect to the reflection layer (3), for generating a reversible change between an amorphous phase and a crystalline phase that can be detected optically by applying a laser beam, and a dielectric layer (50) disposed between the reflection layer (3) and the recording layer (6). The dielectric layer (50) contains at least Zr, Si and Cr, a ratio of Zr, Si and Cr of the dielectric layer (50) at the reflection layer side is expressed as Zr:Si:Cr=p:q:r (p+q+r=100), a ratio of Zr, Si and Cr of the dielectric layer (50) in the vicinity of the interface at the recording layer side is expressed as Zr:Si:Cr=s:t:u (s+t+u=100), and r
摘要翻译:本发明的光信息记录介质具有至少两个信息层。 设置在前侧(从激光入射侧观察)的第一信息层(100)至少包括反射层(3),设置在相对于反射层(3)的激光入射侧的记录层(6) ),用于通过施加激光束在可以被光学检测的非晶相和结晶相之间产生可逆变化,以及设置在反射层(3)和记录层(6)之间的介电层(50)。 电介质层(50)至少包含Zr,Si和Cr,反射层侧的介电层(50)的Zr,Si和Cr的比率表示为Zr:Si:Cr = p:q:r( p + q + r = 100),记录层侧的界面附近的电介质层(50)的Zr,Si和Cr的比率表示为Zr:Si:Cr = s:t:u( s + t + u = 100),r
摘要:
An optical information recording medium of the present invention includes at least m (m is an integer of 2 or more) information layers, and each of the information layers includes a recording layer that changes irreversibly between a state A and a state B that are optically different from each other. In the case where the m information layers are taken as the first through m-th information layers in the order from a laser beam incidence side, when a recording layer included in the j-th information layer (j is an integer satisfying 1≦j≦m−1) is taken as the j-th recording layer, and when a transmittance of the j-th information layer at the time when the j-th recording layer is in the state A is TAj (%) and a transmittance of the j-th information layer at the time when the j-th recording layer is in the state B is TBj (%), the following relationship is satisfied in the j-th information layer: 0≦|TAj−TBj|/(TAj,TBj)max≦0.10 where (TAj,TBj)max is a larger value of TAj and TBj. Furthermore, at least one recording layer of the first through (m−1)th recording layers is formed of a material having a complex index of refraction (n−ik, where n is a refractive index and k is an extinction coefficient) that is different from that of the m-th recording layer.
摘要:
An information recording medium having such a recording material layer on a substrate where reversible phase change between electrically or optically detectable states can be caused by electric energy or electromagnetic energy. The recording material forming the recording layer is either a material having a crystal structure including lattice defects in one phase of the reversible phase change or a material having a complex phase composed of a crystal portion including a lattice defect in one phase of the reversible phase change and an amorphous portion. Both portions contain a common element. A part of the lattice defects are filled with an element other than the element constituting the crystal structure. The recording medium having a recording thin film exhibits little variation of the recording and reproduction characteristics even after repetition of recording and reproduction, excellent weatherability, strong resistance against composition variation, and easily controllable characteristics.
摘要:
The information recording medium of the present invention comprises at least one of the following oxide-based material layers: (I) an oxide-based material layer containing Zr, at least one element selected from the group GL1 consisting of La, Ga and In, and oxygen (O); (II) an oxide-based material layer containing M1 (where M1 is a mixture of Zr and Hf, or Hf), at least one element selected from the group GL2 consisting of La, Ce, Al, Ga, In, Mg and Y, and O; (III) an oxide-based material layer containing at least one element selected from the group GM2 consisting of Zr and Hf, at least one element selected from the group GL2, Si, and O; and (IV) an oxide-based material layer containing at least one element selected from the group GM2, at least one element selected from the group GL2, Cr, and O. This oxide-based material layer can be used, for example, as a dielectric layer.
摘要:
A memory includes: first and second recording layers for recording information by utilizing a reversible phase change between a crystalline phase and an amorphous phase which occurs due to increases in temperature caused by application of an electric current pulse. The crystallization temperatures of the first and second recording layers, Tx1 and Tx2 have the relationship Tx1 tx2. Ra1+Ra2, Ra1+Rc2, Rc1+Ra2, and Rc1+Rc2 are different from one another where the resistance value of the first recording layer in the amorphous phase is Ra1, the resistance value of the first recording layer in the crystalline phase is Rc1, the resistance value of the second recording layer in the amorphous phase is Ra2 and the resistance value of the second recording layer in the crystalline phase is Rc2.
摘要:
Tracking control is carried out by a push-pull method or by mechanical feed at the time of recording signals, and tracking control is carried out by a phase difference tracking method at the time of reproduction. Thus, a phase change type optical disk which enables phase difference reproduction and is erasable may be realized. In a phase change type optical disk having a phase difference reproduction structure, servo mechanism at the time of reproducing signals may be stably controlled by causing the reflectance of a blank portion to be higher than the reflectance of a recording mark portion.
摘要:
An optical information recording medium comprises a substrate and a multilayered film formed on the substrate, the multilayered film comprising a first information layer, a separating layer, and a second information layer in this order from the side of the substrate. Each of the first information layer and the second information layer comprises a recording layer in which an optical change is caused by irradiation of laser light, and in the first and second information layers, signals can be recorded/reproduced on/from the recording layer by irradiating the recording layer with laser light through the substrate. The first information layer comprises a first protective layer, the recording layer, and a second protective layer in this order from the side of the substrate, and at least one of the first protective layer and the second protective layer comprises at least two layers. The at least two layers comprise a first layer and a second layer in this order from the side near the recording layer. The heat conductivity of a material constituting the second layer is larger than that of a material constituting the first layer.