WO2007119439A1 - 情報記録媒体およびその製造方法 - Google Patents
情報記録媒体およびその製造方法 Download PDFInfo
- Publication number
- WO2007119439A1 WO2007119439A1 PCT/JP2007/055597 JP2007055597W WO2007119439A1 WO 2007119439 A1 WO2007119439 A1 WO 2007119439A1 JP 2007055597 W JP2007055597 W JP 2007055597W WO 2007119439 A1 WO2007119439 A1 WO 2007119439A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- information
- recording medium
- information recording
- transmittance adjusting
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24035—Recording layers
- G11B7/24038—Multiple laminated recording layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
- G11B7/266—Sputtering or spin-coating layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25706—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing transition metal elements (Zn, Fe, Co, Ni, Pt)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25708—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing group 13 elements (B, Al, Ga)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
- G11B2007/25715—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing oxygen
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00454—Recording involving phase-change effects
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
Definitions
- the present invention relates to an information recording medium for recording and reproducing information by laser beam irradiation and a method for manufacturing the same.
- optical recording media can record signals by modulating the output of a laser beam between at least two power levels. If the power level is selected appropriately, new signals can be recorded at the same time while erasing already recorded signals.
- the inventor has announced an optical recording medium having two information layers as a technique for increasing the capacity of the optical recording medium.
- Information can be recorded on and reproduced from the two information layers by a laser beam incident on the optical recording medium from one side of the optical recording medium. With such a configuration, the recording capacity of the optical recording medium can be almost doubled.
- the laser beam incident side (hereinafter simply referred to as the incident side) may be described.
- Information is recorded on and reproduced from the information layer (hereinafter referred to as the first information layer) that is located far from the light source) by a laser beam that has passed through the information layer on the incident side (hereinafter referred to as the second information layer). Therefore, it is preferable that the second information layer has as high a transmittance as possible.
- the inventor is the opposite of the laser beam incident side with respect to the reflective layer in the information layer having the recording layer and the reflective layer in this order from the laser beam incident side. It has been studied to arrange a transmittance adjusting layer having a high refractive index on the side.
- the transmittance of the second information layer is made larger than 46% by using TiO for the transmittance adjusting layer, and the first Information layer Efficient recording and playback is possible (see pamphlet of International Publication No. 03Z025922).
- TiO contains Ag which has a small absorption of blue laser with a refractive index of about 2.7 and a small absorption.
- TiO is the main component and NbO is not used.
- the refractive index is increased by adding to 2 2 5 (for example, in the range of 2.5 to 11% by weight (4 mol% or less, or Nb is 2.5 atomic% or less)), (See, for example, Japanese Patent Laid-Open Nos. 2003-010201 and 2006-45666).
- TiO has a low film formation rate during sputtering.
- the present invention solves the above-described problems, and provides an information recording medium including an excellent transmittance adjusting layer having both a high refractive index comparable to the conventional one and a stable high film formation rate.
- the purpose is to provide.
- Another object of the present invention is to provide a method for manufacturing the information recording medium.
- N information layers (N is an integer of 2 or more) are provided on a substrate, and information is applied to each information layer by irradiation with a laser beam.
- the L-th information layer (L is an integer satisfying 2 ⁇ L ⁇ N) includes at least a recording layer capable of causing a phase change by laser beam irradiation, a reflective layer, and a transmittance adjusting layer.
- the transmittance adjusting layer includes at least one element M selected from Ti, Zr, Hf, Y, Cr, ⁇ , Ga, Co, Bi, In, Ta, and Ce.
- a method of manufacturing an information recording medium of the present invention is a method of manufacturing the information recording medium of the present invention described above, and includes a step of manufacturing the Lth information layer, and the step includes
- step (iii) a recording layer forming step of forming a recording layer capable of causing a phase change by laser beam irradiation, and the steps (i) to (iii) 1S step (i) and step (ii) , Step (iii), or step (iii), step (ii), step (i).
- the transmittance adjusting layer having a refractive index as high as the conventional one can be stably and efficiently formed, the Lth information layer (L is Multi-layer information recording media with high transmittance (integer satisfying 2 ⁇ L ⁇ N) and good recording / reproduction characteristics can be obtained efficiently.
- FIG. 1 is a cross-sectional view showing one structural example of an information recording medium of the present invention.
- FIG. 2 is a cross-sectional view showing another configuration example of the information recording medium of the present invention.
- FIG. 3 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 4 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 5 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 6 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 7 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 8 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 9 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 10 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 11 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 12 is a cross-sectional view showing still another configuration example of the information recording medium of the present invention.
- FIG. 13 shows a record usable for recording / reproducing information on / from the information recording medium of the present invention. It is the schematic which shows an example of a recording / reproducing apparatus.
- FIG. 14 is a schematic diagram showing an example of a recording pulse waveform used for recording / reproducing information with respect to the information recording medium of the present invention.
- FIG. 15 is a flowchart showing an example of the method for manufacturing the information recording medium of the present invention, in which the substrate annealing step is omitted when the transmittance adjusting layer is manufactured.
- FIG. 16 is a flowchart showing an example of a conventional method of manufacturing an information recording medium including a substrate annealing process.
- FIG. 1 shows a partial sectional view of the information recording medium in the first embodiment.
- the information recording medium 2 of the present embodiment is an optical information recording medium capable of recording and reproducing information by irradiating the laser beam 4 collected by the objective lens 5.
- the transparent layer 3 side is the laser beam incident side.
- FIG. 2 is a partial cross-sectional view showing in detail the film configuration of the first information layer 11 and the second information layer 13 in the information recording medium 2 of the present embodiment.
- the first information layer 11 has a reflective layer 112, a first dielectric layer 113, a first interface layer 114, a recording layer from the side close to the substrate 1 (the side opposite to the laser beam incident side).
- the layer 115, the second interface layer 116, and the second dielectric layer 117 are provided in this order.
- the second information layer 13 disposed across the separation layer 12 includes the transmittance adjusting layer 131, the reflection layer Layer 132, first dielectric layer 133, first interface layer 134, recording layer 135, a second interface layer 136, and a second dielectric layer 137 are provided in this order. That is, the second information layer 13 includes the recording layer 135, the reflective layer 132, and the transmittance adjusting layer 131 in this order from the laser beam incident side.
- the transparent layer 3 side force laser beam 4 is focused on the information recording medium 2 by the objective lens 5, and the laser is applied to the recording layer 115 of the first information layer 11 or the recording layer 135 of the second information layer 13. Information is recorded and reproduced by irradiating the beam. At this time, the laser beam and its reflected light reaching the first information layer 11 are attenuated by passing through the second information layer 13. Therefore, the first information layer 11 needs to have high recording sensitivity and high reflectance, and the second information layer 13 needs to have high transmittance.
- the substrate 1 has a disk shape and is provided to hold all layers including the first information layer 11.
- a guide groove for guiding the laser beam 4 may be formed on the surface of the substrate 1 on the first information layer 11 side.
- the surface on the first information layer 11 side of the substrate 1 and the surface on the opposite side are preferably smooth.
- the material of the substrate polycarbonate resin, polymethyl methacrylate resin, polyolefin resin, norbornene resin, glass, or a combination thereof can be used.
- the recording layer 115 is a layer that can cause a phase change between a crystalline phase and an amorphous phase by irradiation with the laser beam 4.
- the material used for such a recording layer 115 includes, for example, at least one material selected from Ge—Sb Te, Ge Bi Te, Ge Sn Te, Ge Sb—Sn Te, and Ge Bi—Sn Te force. Things can be used.
- the recording layer 115 preferably has an amorphous phase that can be easily changed to a crystalline phase when irradiated with a laser beam, and that the recording layer 115 does not change to a crystalline phase when not irradiated with a laser beam.
- the film thickness of the recording layer 115 is 5 ⁇ ! Preferably within the range of ⁇ 15nm! / ,.
- the reflective layer 112 has an optical function of increasing the amount of light absorbed by the recording layer 115 and a thermal function when diffusing heat generated in the recording layer 115.
- a material containing at least one element selected from Ag, Au, Cu, and A1 force should be used. it can.
- alloys such as Ag—Cu, Ag—Ga—Cu, Ag—Pd—Cu, Ag—Nd—Au, AlNi ⁇ AlCr, Au—Cr, and Ag—In can be used.
- an Ag alloy is preferable as a material for the reflective layer 112 because of its high thermal conductivity.
- the first dielectric layer 113 is located between the recording layer 115 and the reflective layer 112, and has a thermal function to adjust thermal diffusion from the recording layer 115 to the reflective layer 112, and reflectivity and absorption. It has an optical function to adjust the rate.
- Examples of the material for the first dielectric layer include ZrO, HfO, ZnO, Si
- Sulfuric acid such as S and CdS, or a mixture thereof can be used.
- the mixtures include ZrO—SiO, ZrO—SiO—CrO, ZrO—SiO—GaO, and HfO—S.
- the film thickness of the first dielectric layer 113 is preferably in the range of 5 nm to 40 nm.
- the first interface layer 114 has a function of preventing mass transfer that occurs between the first dielectric layer 113 and the recording layer 115 due to repeated recording.
- the first interface layer 114 is preferably a material that has a high melting point that does not melt during recording, and has good adhesion to the recording layer 115. Examples of the material of the first interface layer 114 include ZrO, HfO, ZnO, SiO, SnO, and Cr 2 O.
- the second dielectric layer 117 is arranged on the laser beam incident side with respect to the recording layer 115, and adjusts the function of preventing the recording layer 115 from being corroded, deformed, and the reflectance and absorption rate. With optical functions.
- the material of the second dielectric layer 117 the same material as that of the first dielectric layer 113 can be used.
- the film thickness of the second dielectric layer 117 may be determined so that the change in reflectance between the case where the recording layer 115 is in the crystalline phase and the case where it is in the amorphous phase becomes large.
- the film thickness of the second dielectric layer 117 is preferably in the range of 20 nm to 80 nm.
- the second interface layer 116 has a function of preventing mass transfer that occurs between the second dielectric layer 117 and the recording layer 115 due to repeated recording. Therefore, it is preferable that the material has the same performance as the first interface layer 114.
- the film thickness of the second interface layer 116 is preferably in the range of 0.3 nm to 15 nm! /.
- the first information layer 11 is formed by the reflective layer 112, the first dielectric layer 113, the first interface layer 114, the recording layer 115, the second interface layer 116, and the second dielectric layer 117. Formed!
- the separation layer 12 is a layer provided to distinguish the focus positions of the first information layer 11 and the second information layer 13.
- the thickness of the separation layer 12 is preferably equal to or greater than the depth of focus determined by the numerical aperture NA of the objective lens 5 and the wavelength of the laser beam 4.
- all the information layers separated by the separation layer 12 (in this embodiment, the first information layer 11 and the second information layer 13) must be within a range where light can be collected by the objective lens 5,
- the separation layer 12 preferably has a small light absorption with respect to the laser beam 4.
- a guide groove for guiding the laser beam 4 may be formed on the surface of the separation layer 12 on the second information layer 13 side.
- the material of the separation layer 12 is polycarbonate resin, polymethylmetatalate resin, polyolefin resin, norbornene resin, ultraviolet curable resin, slow-acting thermosetting resin, glass, or these as appropriate. Combinations or the like can be used.
- the second information layer 13 is close to the first information layer 11, and from the side, the transmittance adjustment layer 131, the reflective layer 132, the first dielectric layer 133, the first interface layer 134, Recording layer 135, second interface layer 136 and a second dielectric layer 137 are provided in this order.
- the recording layer 135 has the same function as the recording layer 115 of the first information layer 11 described above, and the same material can be used.
- the film thickness of the recording layer 135 is preferably 15 nm or less, more preferably 9 nm or less.
- the thickness of the recording layer 135 can be in the range of 1 nm to 15 nm (more preferably in the range of 1 nm to 9 nm).
- the reflective layer 132 has the same function as the reflective layer 132 of the first information layer 11 described above, and the same material can be used. However, in order to increase the transmittance of the second information layer 13, the thickness of the reflective layer 132 is preferably 18 nm or less, and more preferably in the range of lnm to 15 nm.
- the first dielectric layer 133 has the same function as the first dielectric layer 113 of the first information layer 11 described above, and the same material can be used.
- the thickness of the first dielectric layer 133 is 5 ⁇ ! ⁇ 3
- the first interface layer 134 has a function similar to that of the first interface layer 114 of the first information layer 11 described above, and the same material can be used.
- the thickness of the first interface layer 134 is 0.3 ⁇ ! Preferably in the range of ⁇ 15 ⁇ m! / ,.
- the second dielectric layer 137 has a function similar to that of the second dielectric layer 117 of the first information layer 11 described above, and a similar material can be used.
- the thickness of the first dielectric layer 137 is 15 ⁇ ! ⁇
- the second interface layer 136 has the same function as the second interface layer 116 of the first information layer 11 described above, and the same material can be used.
- the thickness of the second interface layer 136 is 0.3 ⁇ ! Preferably in the range of ⁇ 15 ⁇ m! / ,.
- the transmittance adjusting layer 131 has a function of adjusting the transmittance of the second information layer 13.
- the transmittance adjusting layer 131 allows the transmittance T c (%) of the second information layer 13 when the recording layer 135 is a crystalline phase and the second information layer 13 when the recording layer 135 is an amorphous phase.
- the transmittance Ta (%) of both can be increased.
- the refractive index n and the extinction coefficient k of the transmittance adjusting layer 131 are determined by the transmittance Tc of the first information layer 13.
- the layer 131 contains the element M, Nb, and oxygen (O).
- the Nb content in the transmittance adjusting layer 131 is 2.9 atomic% or more. Therefore, a mixture of Nb oxide and element M oxide can be used as the material of the transmittance adjusting layer 131.
- Nb 2 O which is an oxide of Nb, or a material containing Nb 2 O.
- the material of the transmittance adjusting layer 131 is made of Nb in order to sufficiently increase the film formation rate and to reduce the film formation rate fluctuation due to moisture (to increase the film formation rate stability). It is desirable to contain 8.6 atomic% or more (for example, 9 atomic% or more or 15 atomic% or more). For example, it is preferable to use a material represented by the following formula (1).
- Nb M 2 O (atomic%) means “Nb” atom, “M” atom.
- composition formula expressed based on the total number of “o” atoms (100%).
- the transmittance adjusting layer 131 when the preferred material of the transmittance adjusting layer 131 is represented by an oxide, the transmittance adjusting layer 131 preferably has a film formation rate that preferably includes 10 mol% or more of NbO, And,
- a material represented by the following formula (2) is preferably used as the material included in the transmittance adjusting layer 131.
- M—O represents an oxide of the element M, and z satisfies z ⁇ 30.
- the transmittance adjustment layer 131 is formed of a material containing elements other than the elements M, Nb, and oxygen (O), which may be formed of a material consisting of only the elements M, Nb, and oxygen (O). May be.
- the transmittance adjusting layer 131 includes other elements, it is preferable that the total of elements M, Nb, and oxygen (O) is 90 atomic% or more. Further, when expressed in oxide, it is preferable that the transmittance adjusting layer 131 contains 90 mol% or more of Nb oxide and element M oxide in total.
- the thickness d of the transmittance adjusting layer 131 is ⁇ Z3 in order to increase the transmittance Tc, Ta more effectively.
- the thickness of the excess ratio adjusting layer 131 is, for example, 5 ⁇ ! It is preferable to be within a range of ⁇ 36 nm.
- a second information layer 13 is formed.
- the transparent layer 3 is arranged on the laser beam incident side with respect to the second information layer 13 and plays a role of protecting the information layers 11 and 13.
- the transparent layer 3 preferably has low light absorption with respect to the laser beam 4.
- the material of the transparent layer 3 is, for example, polycarbonate resin, polyethylene methacrylate resin, polyolefin resin, norbornene resin, ultraviolet curable resin, slow-acting thermosetting resin, glass, or a combination thereof Etc. can be used. Moreover, you may use the sheet
- the thickness of the transparent layer is preferably in the range of 5 m to 150 m, more preferably in the range of 15 ⁇ m to 50 ⁇ m. ,.
- the information recording medium 2 can be manufactured by the method described below.
- First information layer 11 is laminated on the substrate 1 (thickness is 1.1 mm, for example).
- First information layer 1 1 is a force composed of a multilayer film. Each of these layers can be formed by sequential sputtering.
- the substrate 1 has a high hygroscopic property, and therefore, if necessary, the step of annealing the substrate to remove moisture (hereinafter referred to as substrate annealing step, annealing step or substrate annealing) before sputtering. May be implemented).
- Each layer has a sputtering target of a material constituting each layer in a rare gas atmosphere such as Ar gas, Kr gas, or Xe gas, or a rare gas and a reactive gas (at least one gas selected from oxygen gas and nitrogen gas). And can be formed by sputtering in a mixed gas atmosphere.
- a rare gas atmosphere such as Ar gas, Kr gas, or Xe gas
- a rare gas and a reactive gas at least one gas selected from oxygen gas and nitrogen gas.
- the sputtering method DC sputtering method and RF sputtering method are used properly as necessary. Since the composition of each layer formed by sputtering does not completely match the composition of the original sputtering target, it is necessary to determine the composition of the sputtering target in consideration of the composition shift due to sputtering.
- a sputtering target having the same composition as that of the target film can be used.
- oxygen vacancies are likely to occur by sputtering.
- oxygen vacancies can be compensated by using oxygen gas as the reaction gas.
- the composition of the sputtering target and the film obtained by forming the sputtering target can be confirmed, for example, by analyzing with an X-ray microanalyzer.
- the reflective layer 112 is first formed on the substrate 1.
- the reflective layer 112 can be formed by sputtering a sputtering target made of a metal or an alloy constituting the reflective layer 112 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas.
- a first dielectric layer 113 is formed on the reflective layer 112.
- the first dielectric layer 113 is formed by sputtering a sputtering target having a compound force constituting the first dielectric layer 113 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas. Can be formed.
- a first interface layer 114 is formed on the first dielectric layer 113.
- the first interface layer 11 4 is formed by sputtering a sputtering target made of a compound constituting the first interface layer 114 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas. .
- the recording layer 115 is formed on the first interface layer 114.
- the recording layer 115 can be formed by sputtering a sputtering target having a compound force constituting the recording layer 115 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas.
- the second interface layer 116 is formed on the recording layer 115.
- the second interface layer 116 can be formed by sputtering a sputtering target having a compound force constituting the second interface layer 116 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas.
- a second dielectric layer 117 is formed on the second interface layer 116.
- the second dielectric layer 117 can be formed by sputtering a sputtering target made of a compound constituting the second dielectric layer 117 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas.
- the first information layer 11 is laminated on the substrate 1, and then the separation layer 12 is formed.
- the separation layer 12 is formed, for example, by applying an ultraviolet curable resin or a slow-acting thermosetting resin on the first information layer 11, and then rotating the whole to uniformly extend the resin (spin coating). Then, it can be produced by curing the resin.
- the second information layer 13 is laminated on the substrate 1 on which the first information layer 11 and the separation layer 12 are laminated from the separation layer 12 side (on the separation layer 12).
- the second information layer 13 is formed of a multilayer film like the first information layer 11, but each of these layers can be formed by sequential sputtering.
- the separation layer 12 has a high hygroscopic property depending on the material, so an annealing process should be performed.
- the transmittance adjusting layer 131 is formed on the separation layer 12 (transmittance adjusting layer forming step).
- the permeability adjusting layer 131 is formed by sputtering the sputtering target (first sputtering target) having the compound power constituting the transmittance adjusting layer 131 in a rare gas atmosphere or a mixed gas atmosphere of a rare gas and a reactive gas. Can be formed.
- the material used for 131 is less susceptible to compositional deviation due to sputtering. Therefore, a sputtering target having the same composition as that of the target transmittance adjusting layer 131 can be used.
- a sputtering target containing the element M, Nb, and oxygen (O) and having a Nb content of 2.9 atomic% or more is used. Therefore, it is possible to use a sputtering target including a mixture of an oxide of Nb and an oxide of element M.
- Nb O which is an oxide of Nb
- a material containing NbO can achieve a stable and high deposition rate.
- Nb should be 8.6 atomic% or more (for example, 9 It is desirable to use a sputtering target containing (at.% Or more). For example, it is preferable to use a material represented by the above formula (1).
- the sputtering target used for the transmittance adjusting layer 131 is expressed as an oxide, it contains 10 mol% or more of NbO.
- the sputtering target used here is formed of a material containing other elements other than the elements M, Nb, and oxygen (O), which may be formed of a material having only the power of the elements M, Nb, and oxygen (O). ! When other components are included, it is preferable that the elements M, Nb, and oxygen (O) are included in a total of 90 atomic% or more. In addition, when this sputtering target is expressed as an oxide, it is preferable that the total of the oxide of Nb and the oxide of element M is 90 mol% or more! /.
- a reflective layer 132 is formed on the transmittance adjusting layer 131 (reflective layer forming step).
- the reflective layer 132 can be formed by the same method as the reflective layer 112 described in the method of forming the first information layer 11.
- a sputtering target third sputtering target
- at least one element selected from Ag, Au, Cu, and A1 can be used.
- the first dielectric layer 133 is the first dielectric layer 1 described in the method for forming the first information layer 11. It can be formed by the same method as 13.
- first interface layer 134 is formed on the first dielectric layer 133 (first interface layer forming step).
- the first interface layer 134 can be formed by the same method as the first interface layer 114 described in the method of forming the first information layer 11.
- a recording layer 135 is formed on the first interface layer 134 (recording layer forming step).
- the recording layer 135 can be formed by the same method as the recording layer 115 described in the method of forming the first information layer 11.
- a sputtering device comprising at least one material selected from Ge—Sb—Te, Ge—Bi—Te, Ge—Sn—Te, Ge—Sb—Sn—Te, and 06—81-311—Ding 6.
- One get (second sputtering target) can be used.
- the second interface layer 136 is formed on the recording layer 135 (second interface layer forming step).
- the second interface layer 136 can be formed by the same method as the second interface layer 116 described in the method of forming the first information layer 11.
- a second dielectric layer 137 is formed on the second interface layer 136 (second dielectric layer forming step).
- the second dielectric layer 137 can be formed by the same method as the second dielectric layer 117 described in the method of forming the first information layer 11.
- the second information layer 13 is laminated on the separation layer 12, and then the transparent layer 3 is formed on the second information layer 13.
- the transparent layer 3 can be formed, for example, by applying an ultraviolet curable resin or a slow-acting thermosetting resin on the second information layer 13 and spin-coating it, and then curing the resin.
- the transparent layer 3 can also be formed using a substrate such as a disk-shaped polycarbonate resin, polymethylmetatalate resin, polyolefin resin, norbornene resin, glass or the like.
- the transparent layer 3 is coated with an ultraviolet curable resin or a slow-acting thermosetting resin on the second information layer 13, and after the substrate is brought into close contact with the second information layer 13, spin coating is performed. It can be formed by curing the resin.
- each recording layer of the information recording medium 2 is normally in an amorphous state as it is formed, an initialization process for crystallization by irradiating a laser beam or the like is performed as necessary. That's right.
- the information recording medium 2 of the present embodiment can be manufactured.
- the transmittance adjusting layer 131 is formed using a material whose fluctuation in film forming rate due to moisture is small.
- Substrate annealing treatment (substrate annealing process) can be omitted during film formation.
- the substrate annealing step is omitted when the transmittance adjusting layer 131 is manufactured will be described with reference to the flowchart shown in FIG. First, the substrate 1 is prepared (step S1), and the layers constituting the first information layer 11 are sequentially formed on the substrate 1 by sputtering (step S2).
- FIG. 16 shows a flowchart of a conventional information recording medium manufacturing method in which the substrate annealing process is essential. As shown in FIG.
- the substrate 1 is prepared (step S11), the first information layer 11 is formed by sputtering (step S12), and the separation layer 12 is formed (step S13).
- the same force as in the example of the present embodiment shown in FIG. 15 and then the substrate annealing process (step S14) are required.
- the transmittance adjusting layer 131 is formed by sputtering, and then each layer of the second information layer 13 is formed in order, thereby producing the second information layer, as in the example of the present embodiment. (Step S15). Further, the production of the transparent layer 3 (step S16) and the initialization process (step S17) are performed.
- the above-described information recording medium 2 shown in FIGS. 1 and 2 is an information recording medium having two information layers, but the information recording medium of the present embodiment is a four-layer information recording medium as shown in FIG.
- the information recording medium 6 having the information layer may be used.
- a configuration example of the information recording medium 6 provided with four information layers 25) is shown.
- the first information layer 21 of such an information recording medium 6 can have the same configuration as the first information layer 11 shown in FIGS.
- the second of such information recording medium 6 At least one information layer (information layer corresponding to the Lth information layer in the information recording medium of the present invention) of the information layer 23, the third information layer 24, and the fourth information layer 25 is shown in FIG. 1 or FIG.
- the second information layer 13 basically has the same film configuration (configuration including a transmittance adjusting layer).
- all of the second to fourth information layers 23, 24, 25 may have the same basic configuration as the second information layer 13, or an information layer having a film configuration different from that of the second information layer 13 is included. It may be. That is, the second to fourth information layers 23, 24, and 25 may include an information layer that is not provided with a reflective layer or a transmittance adjustment layer.
- the laser beam reaching the information layer disposed on the substrate 1 side with respect to the fourth information layer 25 and the reflected light thereof are disposed on the laser beam incident side with respect to the information layer. It is attenuated by passing through the information layer. For this reason, the first information layer 21, the second information layer 23, and the third information layer 24 are required to have high recording sensitivity and high reflectance, and the second information layer 23, the third information layer 24, and the fourth information layer 24 are required.
- the information layer 25 needs to have a high transmittance.
- the information recording medium of the present embodiment may more generally be an information recording medium provided with N information layers (here, N is an integer of 3 or more).
- FIG. 4 shows an information recording medium 7 provided with N information layers (first information layer 31, second information layer 33,..., N ⁇ 1 information layer 38 and Nth information layer 39).
- the first information layer 31 of such an information recording medium 7 can have the same film configuration as the first information layer 11 shown in FIGS.
- the information layer corresponding to the information layer has basically the same configuration as the second information layer 13 shown in FIG. 1 or 2 (configuration including the transmittance adjusting layer).
- the second to Nth information layers 33,..., 38, 39 may all have the same configuration as the second information layer 13, and may be different from the second information layer 13.
- An information layer of configuration may be included.
- the second to Nth information layers 33, ..., 38, 39 are provided with a reflection layer and a transmittance adjustment layer, and may include an information layer! /, .
- the laser beam reaching the information layer disposed on the substrate 1 side with respect to the Nth information layer 39 and the reflected light thereof are disposed on the laser beam incident side with respect to the information layer. It attenuates by passing through the information layer. Therefore, the first information layer 31
- the second information layer 33, ..., the N-1 information layer 38 needs to have high recording sensitivity and high reflectivity, and the second information layer 33, the third information layer 34, ...
- the Nth-1 information layer 38 and the Nth information layer 39 are required to have high transmittance.
- the information recording medium 6 having four information layers shown in FIG. 3 can be manufactured by the same method as the information recording medium 2 having two information layers shown in FIG. 1 and FIG. That is, the first information layer 21, the second information layer 23, the third information layer 24, and the fourth information layer 25 are sequentially stacked on the substrate 1 via the separation layer 22, and further on the fourth information layer 25. By forming the transparent layer 3, the information recording medium 6 can be produced.
- the information recording medium 7 having N information layers shown in FIG. 4 is produced by the same method as the information recording medium 2 having two information layers shown in FIG. 1 and FIG. it can.
- a first information layer 31 On the substrate 1, a first information layer 31, a second information layer 33,..., An N ⁇ 1th information layer 38 and an Nth information layer 39 are sequentially stacked via a separation layer 32. Thereafter, the information recording medium 7 can be produced by forming the transparent layer 3 on the Nth information layer 39.
- each recording layer of the information recording medium 6 and the information recording medium 7 is normally in an amorphous state when it is formed, it is crystallized by irradiating a laser beam as necessary. You can do the initialization process.
- the information recording medium 6 and the information recording medium 7 can be manufactured.
- At least one information layer includes a recording layer, a reflective layer, and a transmittance adjustment layer that cause phase change in this order from the laser beam incident side. If so,
- two of the four information layers are read-only information layers, and two of them are a recording layer that causes phase change, a reflective layer, and transmittance adjustment. It can also be an information layer including a layer. Further, the recording layer may be a recording layer that generates a reversible phase change or a recording layer that generates an irreversible phase change.
- the sputtering method is used as a method for forming each layer constituting the information layer.
- the present invention is not limited to this, and vacuum deposition, ion plating, MB It is also possible to use E (Molecular Beam Epitaxy) method or the like.
- FIG. 5 shows a partial cross-sectional view of the information recording medium in the second embodiment.
- the information recording medium 8 can record and reproduce information by irradiating the laser beam 4 collected by the objective lens 5. Is an optical information recording medium.
- the second information layer 13 is laminated on the first substrate 53, and the first information layer 11 is laminated on the second substrate 51.
- the first information layer 11 and the second information layer 13 are stacked.
- the first substrate 53 side is the laser beam incident side.
- the first substrate 53 and the second substrate 51 are disk-shaped. Further, the first substrate 53 is substantially transparent.
- the material of the first substrate 53 and the second substrate 51 is the same as that of the substrate 1 described in the first embodiment, such as polycarbonate resin, polymethylmetallate resin, polyolefin resin, norbornene resin, Glass or a combination of these can be used.
- Guide grooves for guiding the laser beam 4 may be formed on the surface of the first substrate 53 on the second information layer 13 side and on the surface of the second substrate 51 on the first information layer 11 side. .
- the thickness of the first substrate 53 and the second substrate 51 is sufficiently strong, and the thickness of the entire information recording medium 8 is about 1.2 mm. It is preferably within a range of 9 mm.
- the material of the adhesive layer 52 an ultraviolet curable resin or the like can be used.
- the thickness of the adhesive layer 52 is preferably in the range of 5 m to 50 m for the same reason as the separation layer 12 of the first embodiment.
- first information layer 11 and second information layer 13 each have the same film configuration as the two information layers provided in information recording medium 2 described in the first embodiment. . Therefore, description of each layer included in the first information layer 11 and the second information layer 13 is omitted here.
- the information recording medium 8 can be manufactured by the method described below.
- the second information layer 13 is formed on the first substrate 53 (having a thickness of 0.6 mm, for example). Specifically, on the first substrate 53, the second dielectric layer 137, the second interface layer 136, the recording layer 135, the first interface layer 134, the first dielectric layer 133, the reflection The layer 132 and the transmittance adjusting layer 131 are sequentially formed by sputtering. Each layer can be formed using the same method as in the first embodiment.
- the first information layer 11 is formed on the second substrate 51 (having a thickness of 0.6 mm, for example). Specifically, on the second substrate 51, the reflective layer 112, the first dielectric layer 113, the first interface layer 114, the recording layer 115, the second interface layer 116, and the second dielectric layer 117 are formed. Are sequentially formed by sputtering. Each layer can be formed using the same method as in the first embodiment.
- the first substrate 53 and the second substrate 51 on which the respective information layers are stacked are bonded together using the adhesive layer 52. That is, the first information layer 11 and the second information layer 13 are bonded together.
- the first information layer 11 laminated on the second substrate 51 is coated with an ultraviolet curable resin or the like, and the second information layer 13 laminated on the first substrate 53. After adhering to the first information layer 11 and spin-coating, the resin is cured.
- step (I) replaces the steps (i) to (iii) in the step of manufacturing the Lth information layer with the step (iii), If step (ii) and step (i) are included in this order, and L satisfies 2 ⁇ L ⁇ m—1, then step (i) is the step in the step of manufacturing the Lth information layer (
- the method includes steps i) to (iii) in the order of step (i), step (ii), and step (iii).
- the second information layer 13 corresponds to the m-th information layer and the first information layer 11 corresponds to the m-l information layer.
- step (i) is the transmittance adjusting layer forming step in the production method of the present invention
- step (ii) is This is a reflective layer forming step
- step (iii) is a recording layer forming step.
- each recording layer of the information recording medium 8 is normally in an amorphous state as it is formed, an initialization process for crystallization by irradiating a laser beam or the like is performed as necessary. That's right.
- the information recording medium 8 can be manufactured.
- the information recording medium 8 shown in FIGS. 5 and 6 described above is an information recording medium having two information layers.
- the information recording medium of the present embodiment is shown in FIG.
- Such an information recording medium 9 having four information layers may be used.
- a configuration example of the information recording medium 9 provided with the information layer 25) is shown.
- the first information layer 21 of such an information recording medium 9 has the same film configuration as the first information layer 11 shown in FIGS.
- At least one information layer (corresponding to the Lth information layer in the information recording medium of the present invention) of the second information layer 23, the third information layer 24, and the fourth information layer 25 of the information recording medium 9 as described above.
- the information layer has basically the same configuration as the second information layer 13 shown in FIG. 5 and FIG. 6 (configuration including the transmittance adjustment layer). All of the second to fourth information layers 23, 24, 25 may have the same configuration as the second information layer 13, or include an information layer having a film configuration different from that of the second information layer 13. May be. That is, the second to fourth information layers 23, 24, and 25 may include an information layer that is not provided with a reflective layer or a transmittance adjustment layer.
- the laser beam reaching the information layer disposed on the second substrate 51 side with respect to the fourth information layer 25 and the reflected light thereof are on the laser beam incident side with respect to the information layer. It attenuates by passing through the information layer arranged in the. For this reason, the first information layer 21, the second information layer 23, and the third information layer 24 must have high recording sensitivity and high reflectance, and the second information layer 23, the third information layer 24, and the fourth information layer Layer 25 needs to have a high transmittance.
- the information recording medium of the present embodiment may be an information recording medium provided with N information layers (here, N is an integer of 3 or more).
- N information layers first information layer 31, second information layer 33,..., N ⁇ 1 information layer 38 and Nth information layer 39
- a configuration example of the recorded information recording medium 10 is shown.
- the first information layer 31 of such an information recording medium 10 can have the same configuration as the first information layer 11 shown in FIGS.
- the information layer corresponding to the L information layer has basically the same configuration as the second information layer 13 shown in FIG.
- All of the 2nd to Nth information layers 33, ..., 38, 39 may have the same configuration as the second information layer 13, and the information of the film configuration different from that of the second information layer 13 A layer may be included.
- the second to Nth information layers 33, ..., 38, 39 are provided with a reflection layer and a transmittance adjustment layer, and may include an information layer! /, .
- the laser beam reaching the information layer disposed on the second substrate 51 side relative to the Nth information layer 39 and the reflected light thereof are more incident on the laser beam incident side than the information layer. It attenuates by passing through the information layer arranged in the. Therefore, the first information layer 31, the second information layer 33, ..., the N-1 information layer 38 needs to have high recording sensitivity and high reflectance, and the second information layer 33, ... The N-1th information layer 38 and the Nth information layer 39 are required to have high transmittance.
- the information recording medium 9 having four information layers shown in FIG. 7 can be manufactured by the same method as the information recording medium 8 having two information layers shown in FIG. 5 and FIG. That is, first, the fourth information layer 25, the third information layer 24, and the second information layer 23 (m-th information layer) are sequentially formed on the first substrate 53 via the separation layer 12.
- the separation layer 12 is formed by a method similar to the method described in the first embodiment.
- the first information layer 21 (the m ⁇ 1th information layer) is formed on the second substrate 51.
- the first substrate 53 and the second substrate 51 on which the respective information layers are stacked are bonded together using the adhesive layer 52.
- the first information layer 11 laminated on the second substrate 51 is coated with an ultraviolet curable resin or the like, and the first information layer 11 laminated on the first substrate 53 is used. It is preferable to harden the resin after spin-coating the two information layers 13 in close contact with the first information layer.
- the information recording medium 10 having N information layers shown in FIG. 8 can also be manufactured by the same method as the information recording medium 9 having four information layers shown in FIG. First, on the first substrate 53, the Nth information layer 39, the N ⁇ 1th information layer 38,..., The second information layer 33 (mth information layer) are sequentially passed through the separation layer 12. Form.
- the separation layer 12 is formed by the same method as described in the first embodiment.
- the first information layer 31 (the m ⁇ 1th information layer) is formed on the second substrate 51.
- the first substrate 53 and the second substrate 51 on which the respective information layers are stacked are bonded together using the adhesive layer 52.
- the first information layer 31 laminated on the second substrate 51 is coated with an ultraviolet curable resin or the like, and the first information layer 31 laminated on the first substrate 53 is coated. It is advisable to harden the resin after spin-coating the two information layers 33 in close contact with the first information layer.
- each recording layer of the information recording medium 9 and the information recording medium 10 is normally in an amorphous state as it is formed, it is crystallized by irradiating a laser beam as necessary. You can do the initialization process.
- the information recording medium 9 and the information recording medium 10 can be manufactured.
- At least one information layer includes a recording layer, a reflective layer, and a transmittance adjustment layer that cause phase change in this order from the laser beam incident side. If so,
- the four information layers are read-only information layers, and the other two are a recording layer and a reflective layer capable of causing a phase change. It is also possible to use an information layer including a transmittance adjusting layer. Further, the recording layer may be a recording layer that causes a reversible phase change or a recording layer that causes an irreversible phase change.
- the sputtering method is used as a method of forming each layer constituting the information layer.
- the present invention is not limited to this, and vacuum deposition, ion plating, MBE (Molecular It is also possible to use a beam epitaxy method or the like.
- FIG. 9 shows a partial cross-sectional view of the information recording medium in the third embodiment.
- Information recording medium of the present embodiment 15 Is an optical information recording medium capable of recording / reproducing information by irradiating the laser beam 4 collected by the objective lens 5 similarly to the information recording medium 2 described in the first embodiment. .
- the substrate 55 side is the laser beam incident side.
- FIG. 10 is a partial cross-sectional view showing in detail the film configuration of the first information layer 11 and the second information layer 13 in the information recording medium 15 of the present embodiment.
- the substrate 55 and the dummy substrate 60 are disk-shaped. Further, the substrate 55 is substantially transparent.
- the material of the substrate 55 and the dummy substrate 60 is the same as that of the substrate 1 described in the first embodiment, such as polycarbonate resin, polymethyl methacrylate resin, polyolefin resin, norbornene resin, glass, or these. Can be used as appropriate.
- a guide groove for guiding the laser beam 4 may be formed on the surface of the substrate 55 on the second information layer 13 side.
- the thickness of the substrate 55 and the dummy substrate 60 is within a range of 0.3 mm to 0.9 mm so that the thickness of the substrate 55 and the dummy substrate 60 is sufficient and the total thickness of the information recording medium 15 is about 1.2 mm. It is preferable that
- the material of the adhesive layer 52 an ultraviolet curable resin or the like can be used.
- the thickness of the adhesive layer 52 is preferably in the range of 5 m to 50 m for the same reason as the separation layer 12 of the first embodiment.
- the first information layer 11 and the second information layer 13 have the same film configuration as the two information layers provided in the information recording medium 2 described in the first embodiment. Therefore, description of each layer included in each information layer is omitted here.
- the information recording medium 15 can be manufactured by the method described below.
- the second information layer 13 is formed on the substrate 55 (having a thickness of 0.6 mm, for example). Specifically, on the substrate 55, the second dielectric layer 137, the second interface layer 136, the recording layer 135, the first interface layer 134, the first dielectric layer 133, the reflective layer 132, the transmittance Sputtering adjustment layer 131 sequentially To form a film. At this time, if necessary, an annealing process may be performed before sputtering. Each layer can be formed using the same method as in the first embodiment.
- the second information layer 13 is laminated on the substrate 55, and then the separation layer 12 is formed in the same manner as in the first embodiment.
- the first information layer 11 is laminated on the separation layer 12. Specifically, the second dielectric layer 117, the second interface layer 116, the recording layer 115, the first interface layer 114, the first dielectric layer 113, and the reflective layer 112 are sequentially formed on the separation layer 12. A film is formed by sputtering. Each layer can be formed using the same method as in the first embodiment.
- the substrate 55 on which the first information layer 11 and the second information layer 13 are laminated and the dummy substrate 60 are bonded together using the adhesive layer 52.
- an ultraviolet curable resin or the like is applied on the first information layer 11 laminated on the substrate 55, and the dummy substrate 60 is adhered to the first information layer 11 and spin-coated. It is good to harden fat.
- each recording layer of the information recording medium 15 is normally in an amorphous state when it is formed, an initialization process is performed for crystallization by irradiating a laser beam, if necessary. It may be any.
- the information recording medium 15 of the present embodiment can be manufactured.
- the information recording medium of the present embodiment may be an information recording medium 16 having four information layers as shown in FIG.
- two of the four information layers are read-only information layers, and the remaining two are a recording layer that can cause a phase change, a reflective layer, and It can be an information layer including a transmittance adjusting layer.
- the recording layer may be a recording layer that causes a reversible phase change or a recording layer that causes an irreversible phase change.
- FIG. 13 shows a description for recording and reproducing information on the information recording medium of the present invention.
- 1 shows a schematic diagram of an example of a recording / playback apparatus.
- This recording / reproducing apparatus includes a motor 505 for rotating an information recording medium 506, a laser diode 501, a noise mirror 503, an object lens 504, and a photodetector 507.
- the laser beam 502 emitted from the laser diode 501 is focused on the information layer of the information recording medium 506 rotated by the motor 505 through the half mirror 503 and the objective lens 504.
- Information reproduction is performed by causing reflected light from the information recording medium 506 to enter the photodetector 507 and detecting the signal.
- Information recording medium 506 is a medium having any one of the configurations described in the first to third embodiments.
- the intensity of the laser beam 502 is modulated between a plurality of power levels.
- current modulation means for modulating the drive current of the laser diode 501 can be used.
- a single rectangular pulse with a peak power Pp may be applied to the portion where the recording mark is to be formed. However, particularly when a long mark is to be formed, the mark width is made uniform by eliminating excessive heat.
- a recording pulse train having a plurality of pulse train forces modulated between peak power Pp and bottom power Pb (where Pp> Pb) may be used.
- a cooling section with cooling power Pc may be provided after the last pulse.
- the bias power Pe (where Pp> Pe) is kept constant for the part where no mark is formed.
- Example 1 a sputtering target with Nb 2 O or TiO force
- Table 1 shows the NbO or TiO force.
- the deposition rate when sputtering using a sputtering target with a diameter of 200 mm is divided according to whether or not the substrate annealing process is performed.
- the film formation rate was measured as follows. First, a polycarbonate substrate having a glass piece attached thereto was prepared, and a substrate annealing process was performed as necessary. Next, this polycarbonate substrate was placed in a sputtering apparatus, and a sputtered film was formed by DC sputtering on the side of the polycarbonate substrate on which the glass piece was attached.
- the DC sputtering conditions were an atmosphere of 0.5 Pa mixed gas of Ar and oxygen (oxygen concentration was 3%), and the input power was 2.5 kW.
- the glass piece is removed from the polycarbonate substrate, and the sputtered film of the glass piece is scraped with a knife to create a step corresponding to the film thickness of the sputtered film, and this step is measured using a step gauge.
- the film formation rate was calculated by calculating the relationship between the film thickness of the sputtering film and the film formation time.
- the polycarbonate substrate was stored in an oven at 80 ° C for 10 hours to remove moisture adsorbed on the polycarbonate substrate, and then subjected to sputtering.
- sputtering was performed after placing the polycarbonate substrate in the laboratory at room temperature in the atmosphere for 10 hours.
- the sputtering target with Nb O force has a high film formation rate and the annealing process.
- the target has a lower deposition rate than NbO, and when the annealing process is performed
- the deposition rate was 2 nmZsec and the annealing process was not performed, the deposition rate was InmZsec, and the deposition rate varied greatly depending on the presence or absence of the annealing process (Samples 1-3, 1-4). Therefore, sputtering target with TiO power is unstable and unstable.
- film formation rate stability in this example is “ ⁇ ” if the film formation rate does not change depending on the presence or absence of annealing on the polycarbonate substrate. X ”.
- Example 2 the information recording medium having the same configuration as the information recording medium 2 shown in FIG. 2 was examined for corrosion under conditions of high temperature and high humidity.
- the information recording medium used in this example was manufactured as follows. First, a polycarbonate substrate (diameter 120 mm, thickness 1.1 mm) on which a guide groove for guiding a laser beam was formed was prepared as the substrate 1. Then, an Ag—Pd—Cu layer (thickness: 80 nm) was formed as a reflective layer 112 on the polycarbonate substrate by DC sputtering at an input power of 0.2 kW in an atmosphere of Ar gas of 0.5 Pa. However, a substrate annealing process for 10 hours was performed before the formation of the reflective layer 112.
- a ZrO—SiO—InO layer (thickness: 21 nm) was added as Ar.
- Films were formed by RF sputtering in an atmosphere of gas of 0.5 Pa and input power of 2 kW. Subsequently, as the recording layer 115, a Ge Sn Bi Te layer (thickness: l lnm) was deposited in an Ar gas 0.5 Pa atmosphere.
- the film was formed by DC sputtering with an input power of 0.2 kW.
- a Ge—Sn—Bi—Te sputtering target having a diameter of 200 mm, which was adjusted so as to have a target composition in the film formation state in consideration of the difference in sputtering rate of each atom (hereinafter, referred to as the sputtering target) The same applies to all examples.)
- the second interface layer 116 ZrO 2 --SiO 2-
- the film was formed by the etching method. Subsequently, as the second dielectric layer 117, a ZnS—SiO layer (thickness: 48 nm) was formed by RF sputtering at an input power of 5 kW in an Ar gas 0.5 Pa atmosphere, and the first information layer 11 was formed. Formed.
- an ultraviolet curable resin was applied on the first information layer 11, spin-coated, and then the resin was cured by irradiating with ultraviolet rays, whereby the separation layer 12 (thickness 25 ⁇ m) Formed.
- a transmittance adjusting layer 131 (thickness: 22 nm) is DC-sputtered with an Ar and oxygen mixed gas of 0.5 Pa (oxygen concentration is 3%) at an input power of 2 kW.
- the film was formed by the method.
- the transmittance adjustment layer 131 is NbO, TiO or a mixture of NbO and TiO.
- an Ag—Pd—Cu layer (thickness: 10 nm) was formed as the reflective layer 132 by DC sputtering in an Ar gas 0.5 Pa atmosphere with an input power of 0.2 kW.
- a ZrO—SiO—InO layer (thickness: 12 nm) is deposited as the first dielectric layer 133 in an Ar gas 0.5 Pa atmosphere.
- the film was formed by RF sputtering with an input power of 2kW.
- the recording layer 135 Ge Sn
- the film was formed by the etching method.
- the difference in sputtering rate of each atom is taken into consideration, and the Ge—Sn— with a diameter of 200 mm adjusted so as to have a target composition in the film formation state.
- a Bi—Te sputtering target was used.
- a ZrO—SiO—CrO layer (thickness: 5 nm) was used as Ar gas 0.5 Pa.
- the film was formed by RF sputtering with an input power of 2 kW.
- a ZnS-SiO layer (thickness: 37 nm) was used in an Ar gas 0.5 Pa atmosphere, and the input power was 5 k.
- a second information layer 13 was formed by W using RF sputtering.
- the transparent resin 3 (thickness 75 ⁇ m) was obtained by irradiating UV rays to cure the resin. ) was formed.
- Example 3 as in Example 2, the corrosion of the information recording medium having the same configuration as that of the information recording medium 2 shown in FIG.
- the method of manufacturing the information recording medium is the same as that in Example 2.
- the transmittance adjusting layer 131 is made of Nb 2 O,
- a film was formed using a sputtering target having a diameter of 200 mm.
- Example 4 the film formation efficiency and stability of the material used when forming the transmittance adjusting layer in the information recording medium of the present invention by sputtering were examined. It was.
- Example 4 examined Nb O and element M oxides (Ti, Zr, Hf, Y, Cr, ⁇ , Ga
- the method for measuring the deposition rate is the same as in Example 1.
- Table 4 shows the film formation rates when the above sputtering targets were sputtered onto the transmittance adjusting layer.
- the element M is at least one element selected from Ti, Zr, Hf, Y, Cr, ⁇ , Ga, Bi, In, and Ta.
- the element M is at least one element selected from Ti, Zr, Hf, Zn, Ga, Bi, In and Ta, and more preferably the element M is Zn, Ga, Bi, It was confirmed that it is at least one element selected from In and Ta, and more preferably at least one element selected from the elements M force Bi and In force.
- Example 5 the film formation efficiency and stability of the material used when forming the transmittance adjusting layer in the information recording medium of the present invention by sputtering were examined.
- Nb 2 O, Ta 2 O, or a mixture of Nb 2 O and Ta 2 O was investigated and the composition was (
- the film formation rate of a sputtering target having a diameter of 200 mm expressed as 0, 100).
- the method for measuring the deposition rate is the same as in Example 1.
- Table 5-A shows the deposition rate when the above sputtering target was sputtered onto the transmittance adjusting layer.
- Target composition target composition
- Nb is 8.6 atomic% or more (30 mol% or more as Nb oxide (Nb 2 O 3))
- the inclusion of the inclusion increased the film formation rate and sufficiently suppressed fluctuations in the film formation rate due to the presence / absence of the polycarbonate substrate mark (stable film formation rate).
- the determination of the film formation rate stability is done with the polycarbonate substrate If the deposition rate does not change depending on whether or not there is a film, “ ⁇ ”, and if the deposition rate ratio exceeds 0.5,
- Example 6 the transmittance adjusting layer in the information recording medium of the present invention is formed by sputtering. Thus, the film formation efficiency and stability of each of the materials used for film formation were examined.
- Nb O and TiO were mixed with force, or Nb O, TiO and TiO.
- Table 6 shows the film formation rate and film formation rate stability when the above sputtering targets were sputtered.
- the evaluation of film formation rate stability is the same as in Example 5.
- Example 7 a sample in which only the second information layer 13 and the transparent layer 3 were formed on the substrate 1 without the first information layer 11 and the separation layer 12 of the information recording medium 2 shown in FIG. 2 was manufactured.
- Samples were produced as follows. First, a polycarbonate substrate 1 (diameter 120 mm, thickness 1.1 mm) on which guide grooves for guiding a laser beam were formed was prepared as the substrate 1.
- the transmittance adjusting layer 131 was formed on the polycarbonate substrate by a DC sputtering method in an atmosphere of mixed gas of Ar and oxygen of 0.5 Pa (oxygen concentration: 3%) with an input power of 2 kW. .
- a substrate annealing process for 10 hours was performed before the film formation of the transmittance adjusting layer 131.
- the composition of the manufactured transmittance adjusting layer is as shown in Table 7.
- an Ag—Pd—Cu layer (thickness: lOnm) was formed as the reflective layer 132 by DC sputtering in an Ar gas 0.5 Pa atmosphere at an input power of 0.2 kW.
- a ZrO 2 —SiO 2 —In 2 O layer (thickness: 12 nm) is applied in an Ar gas 0.5 Pa atmosphere.
- the film was formed by RF sputtering at 2kW.
- a film was formed by RF sputtering in an atmosphere of gas of 0.5 Pa and an input power of 0.2 kW.
- a ZnS—SiO layer (thickness: 37 nm) is used in an Ar gas 0.5 Pa atmosphere.
- the film was formed by RF sputtering with an input power of 2kW. In this way, the second information layer 13 was formed.
- an ultraviolet curable resin is applied onto the second information layer 13, spin-coated, and then the resin is cured by irradiating with ultraviolet rays, whereby the transparent layer 3 (thickness 100 m) Formed.
- the transparent layer 3 side force laser beam was irradiated to these samples, and a part of the recording layer was initialized.
- the transmittance Ta when the recording layer 135 was an amorphous phase, and the transmittance Tc when the recording layer was a crystalline phase were measured.
- a spectroscope was used to measure the transmittance, and the transmittance at a wavelength of 405 nm was examined.
- Table 7 shows the refractive index n, extinction coefficient k, and transmittance t t of the second information layer 13 of the transmittance adjustment layer 131.
- the thickness of the transmittance adjusting layer 131 is 22 nm, and the materials are Nb 2 O, Ta 2 O, TiO, (Nb 2 O 3) (Ta 2 O 3) (mol%), ( Nb O) (Ti
- the refractive index and extinction coefficient were measured using an ellipsometer.
- the second information layer 13 has a transmittance Ta and a transmittance Tc of 45% or more. The bigger it is, the higher it is.
- Table 7 shows that the refractive index n of the transmittance adjusting layer 131 is preferably 2.4 or more in the case of the sample manufactured in this example. Transmittance judgment is t
- the film thickness is 2 nm and 5 nm.
- Example 8 the corrosion of the information recording medium 6 shown in FIG. 3 under conditions of high temperature and high humidity was examined.
- the information recording medium 6 has four information layers.
- the information recording medium 6 in this example was manufactured as follows. First, the first information layer 21 and the separation layer 12 (thickness: 10 / zm) were formed on the substrate 1 in the same manner as in Example 2. Further, the second information layer 23 was formed on the separation layer 12. Note that the second information layer 23 produced in this example has the same film configuration as the second information layer 13 of the information recording medium 2 shown in FIG. The method for forming the second information layer 23 will be described below in the same manner as the reference numerals of the layers constituting the information layer 13.
- a transmittance adjusting layer 131 (thickness: 22 nm) was formed by sputtering.
- the material of the transmittance adjusting layer 131 is Nb 2 O, TiO or a mixture of Nb 2 O and TiO,
- the reflective layer 132 is an Ag—Pd—Cu layer (thickness: 8 nm)
- the first dielectric layer 133 is a ZrO—SiO—InO layer (thickness: 10 nm)
- the recording layer 135 is Ge Sn Bi Te layer (thickness:
- a ZnS—SiO layer (thickness: 33 nm) is sequentially deposited as the layer 137 by sputtering, and the second
- An information layer 23 was formed. Thereafter, the separation layer 12 (thickness: 15 / zm) is formed on the second information layer 23, and the third information layer 24, the separation layer 12 (thickness: 20 m), and the fourth information are formed on the separation layer 12.
- Layer 25 was formed.
- the third information layer 24 and the fourth information layer 25 thus fabricated are composed of a transmittance adjusting layer and a reflective layer. This is a force that increases the transmittance by reducing the thickness of the recording layer to 4 nm.
- the rest of the film configuration is the same as that of the second information layer 23.
- UV curable resin was applied on the fourth information layer 25, spin coated, and then cured by irradiation with UV to form transparent layer 3 (thickness 55 ⁇ m). .
- Each sample was irradiated with a laser beam from the transparent layer 3 side to initialize the entire surface of the recording layer.
- Example 9 the information recording medium 7 shown in FIG. 4 was examined for corrosion under high temperature and high humidity conditions.
- the sample of this example was manufactured as follows. First, the first information layer 31 and the separation layer 12 (thickness: 10 / zm) were formed on the substrate 1 in the same manner as in Example 2. Further, the second information layer 33 was formed on the separation layer 12. Since the second information layer 33 produced in this example has the same film configuration as the second information layer 13 of the information recording medium 2 shown in FIG. 2, the code of each layer is designated as the second information layer of the information recording medium 2. The method for forming the second information layer 33 in the present embodiment will be described below by using the same reference numerals as those of the layers constituting the layer 13.
- a transmittance adjusting layer 131 (thickness: 22 nm) was formed by sputtering.
- the material of the transmittance adjusting layer 131 is Nb 2 O, TiO or a mixture of Nb 2 O and TiO.
- the film was formed using a sputtering target having a diameter of 200 mm represented as 0, 90, 100). However, a substrate annealing process for 10 hours was performed before the film formation of the transmittance adjusting layer 131.
- an Ag-Pd-Cu layer (thickness: 7 nm) is formed as the reflective layer 132, and the first dielectric layer 133 is formed.
- ZrO—SiO—In O layer (thickness: lOnm)
- Ge Sn Bi Te layer (thickness:
- a ZnS-SiO layer (thickness: 30 nm) was sequentially deposited as the layer 137 by sputtering, and the second information
- the separation layer 12 (thickness: 12 / zm) is formed on the second information layer 33, the third information layer, the separation layer 12 (thickness: 14 m), the fourth information layer, A separation layer 12 (thickness: 16 m), a fifth information layer, a separation layer 12 (thickness: 18 m), and a sixth information layer were formed.
- the third information layer, the fourth information layer, the fifth information layer, and the sixth information layer do not have the transmittance adjusting layer and the reflecting layer, and further, the third information layer is provided to increase the transmittance.
- the recording layer thickness of the 4th information layer and the recording layer thickness of the 5th information layer 38 and the 6th information layer 39 are reduced to 2 nm.
- UV curable resin was applied on the sixth information layer 39, spin-coated, and then the resin was cured by irradiating with UV to form a transparent layer 3 (thickness 30 m). .
- the manufactured sample was placed in a furnace at a temperature of 90 ° C and humidity of 80% for 200 hours, and then the surface of the information recording medium was magnified 200 times using an optical microscope to observe corrosion. did.
- the result is the same as that obtained in Example 2, and the transmittance adjustment layer 131 is formed only from NbO.
- Example 10 an information recording medium having the same configuration as that of the information recording medium 2 shown in FIG. 2 was manufactured, and the annealing time to be performed before forming the transmittance adjusting layer 131 of the second information layer 13, The relationship with the transmission performance of the second information layer 13 was examined. Specifically, an information recording medium in which the composition of the transmittance adjusting layer 131 is TiO, and an information recording medium in which (Nb 2 O 3) (Bi 2 O 3) (mol%)
- the annealing process was performed before the film formation of the transmittance adjusting layer 131, and the annealing process was not performed. It was confirmed.
- the annealing process time was 2 hours, 5 hours, 10 hours and 24 hours.
- the method of manufacturing the information recording medium in the present embodiment is the same as that in the second embodiment.
- the film formation rate during sputtering of the transmittance adjustment layer 131 of the second information layer 13 is the rate obtained when the annealing process is performed for 10 hours! /
- the wavelength of the laser beam 502 was 405 nm
- the numerical aperture of the objective lens 504 was 0.85
- the linear velocity of the information recording medium 506 at the time of measurement was 4.9 mZs
- the shortest mark length (2T) was 0.149 ⁇ m.
- the reflectance was examined by focusing the laser beam 502 on the first information layer 11 with the objective lens 504, and making the reflected light from the first information layer 11 incident on the photodetector 507 and measuring the signal intensity. Note that the reflectance was examined when the recording layer 115 was in a crystalline phase.
- the recording sensitivity is a random range up to a mark length of 0.149 m (2T) and a force of 0.596 m (8T) by modulating the laser beam power between 0 and Pp (mW).
- Pp, Pe, Pc, and Pb were determined so that the average jitter (average value of front end jitter and rear end jitter) was minimized, and the optimum Pp at this time was used as the recording sensitivity.
- Table 9 shows the recording sensitivity (Pp) and reflectance Rc of the first information layer 11 and the reflectance Rc and transmittance Tc of the second information layer 13 for the manufactured information recording medium.
- the second information layer 13 and the second information layer 13 are formed on the substrate 1 as in Example 7. A sample in which only the protective layer 3 was formed was manufactured, and the transmittance was examined.
- the reflectance and transmittance are all values when the recording layer is in a crystalline phase.
- the measurement was performed on a circle with a radius of 40 mm from the center of the information recording medium 2.
- the performance stability is judged as “Yes” if the performance of the information recording medium does not change due to the presence or absence of the substrate annealing process.
- the transmittance adjustment layer 131 is (Nb 2 O 3) (TiO 2) (mol%), recording sensitivity (Pp), reflection
- the performance becomes stable (Samples 9, 6, 9-7).
- the substrate annealing process time is less than 10 hours, the substrate charac- teristics are required for all of recording sensitivity (Pp), reflectance Rc and transmittance Tc. Changes due to the presence or absence of the process were observed, and the performance was stable (Samples 9 7 to 9 10).
- the information recording medium and the method for producing the same of the present invention are useful for efficiently obtaining a multilayer information recording medium having good recording and reproducing characteristics because the transmittance adjusting layer can be stably and efficiently formed. .
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008510819A JP4750844B2 (ja) | 2006-03-31 | 2007-03-20 | 情報記録媒体およびその製造方法 |
CN200780012407.4A CN101496104B (zh) | 2006-03-31 | 2007-03-20 | 信息记录介质及其制造方法 |
US12/295,083 US8088464B2 (en) | 2006-03-31 | 2007-03-20 | Information recording medium and method for manufacturing same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-098816 | 2006-03-31 | ||
JP2006098816 | 2006-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007119439A1 true WO2007119439A1 (ja) | 2007-10-25 |
Family
ID=38609227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/055597 WO2007119439A1 (ja) | 2006-03-31 | 2007-03-20 | 情報記録媒体およびその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8088464B2 (ja) |
JP (2) | JP4750844B2 (ja) |
CN (1) | CN101496104B (ja) |
TW (1) | TW200805356A (ja) |
WO (1) | WO2007119439A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009096174A1 (ja) * | 2008-01-31 | 2009-08-06 | Panasonic Corporation | 光学的情報記録媒体及びその製造方法 |
WO2009096165A1 (ja) * | 2008-01-31 | 2009-08-06 | Panasonic Corporation | 光学的情報記録媒体とその製造方法、及びターゲット |
WO2010110412A1 (ja) * | 2009-03-27 | 2010-09-30 | 日鉱金属株式会社 | Ti-Nb系酸化物焼結体スパッタリングターゲット、Ti-Nb系酸化物薄膜及び同薄膜の製造方法 |
WO2011024381A1 (ja) * | 2009-08-31 | 2011-03-03 | パナソニック株式会社 | 情報記録媒体とその製造方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090059758A1 (en) * | 2005-04-07 | 2009-03-05 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium and method for manufacturing the same |
JP5441586B2 (ja) * | 2009-09-25 | 2014-03-12 | Tdk株式会社 | 光記録媒体、光記録媒体の製造方法 |
WO2020031498A1 (ja) * | 2018-08-09 | 2020-02-13 | パナソニックIpマネジメント株式会社 | 情報記録媒体およびその製造方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0325922A (ja) * | 1989-06-23 | 1991-02-04 | Nec Kyushu Ltd | 半導体製造装置 |
JPH11316981A (ja) * | 1998-04-30 | 1999-11-16 | Asahi Chem Ind Co Ltd | 光学情報記録媒体の製造方法 |
JP2003013201A (ja) * | 2001-06-26 | 2003-01-15 | Kyocera Corp | 酸化チタン系薄膜及びこれを用いた光記録媒体 |
JP2006045666A (ja) * | 2004-06-29 | 2006-02-16 | Pioneer Electronic Corp | 薄膜形成用スパッタリングターゲット、誘電体薄膜、光ディスク及びその製造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1426939B1 (en) * | 2001-09-12 | 2008-10-15 | Matsushita Electric Industrial Co., Ltd. | Optical information recording medium |
US7449225B2 (en) * | 2002-09-13 | 2008-11-11 | Panasonic Corporation | Information recording medium and method for manufacturing the same |
US20060083150A1 (en) * | 2002-12-13 | 2006-04-20 | Yoshitaka Sakaue | Optical information recording medium and method for manufacturing same |
JP4141993B2 (ja) * | 2003-08-07 | 2008-08-27 | 松下電器産業株式会社 | 光学的情報記録媒体 |
US7858290B2 (en) * | 2003-10-02 | 2010-12-28 | Panasonic Corporation | Information recording medium and method for manufacturing the same |
JP4442543B2 (ja) * | 2005-10-13 | 2010-03-31 | 日本電気株式会社 | 光学的情報記録媒体 |
-
2007
- 2007-03-20 CN CN200780012407.4A patent/CN101496104B/zh not_active Expired - Fee Related
- 2007-03-20 US US12/295,083 patent/US8088464B2/en not_active Expired - Fee Related
- 2007-03-20 JP JP2008510819A patent/JP4750844B2/ja not_active Expired - Fee Related
- 2007-03-20 WO PCT/JP2007/055597 patent/WO2007119439A1/ja active Application Filing
- 2007-03-21 TW TW096109682A patent/TW200805356A/zh unknown
-
2011
- 2011-01-27 JP JP2011014762A patent/JP5058346B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0325922A (ja) * | 1989-06-23 | 1991-02-04 | Nec Kyushu Ltd | 半導体製造装置 |
JPH11316981A (ja) * | 1998-04-30 | 1999-11-16 | Asahi Chem Ind Co Ltd | 光学情報記録媒体の製造方法 |
JP2003013201A (ja) * | 2001-06-26 | 2003-01-15 | Kyocera Corp | 酸化チタン系薄膜及びこれを用いた光記録媒体 |
JP2006045666A (ja) * | 2004-06-29 | 2006-02-16 | Pioneer Electronic Corp | 薄膜形成用スパッタリングターゲット、誘電体薄膜、光ディスク及びその製造方法 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009096174A1 (ja) * | 2008-01-31 | 2009-08-06 | Panasonic Corporation | 光学的情報記録媒体及びその製造方法 |
WO2009096165A1 (ja) * | 2008-01-31 | 2009-08-06 | Panasonic Corporation | 光学的情報記録媒体とその製造方法、及びターゲット |
US8158233B2 (en) | 2008-01-31 | 2012-04-17 | Panasonic Corporation | Optical information recording medium, method of manufacturing the same, and sputtering target |
US8530140B2 (en) | 2008-01-31 | 2013-09-10 | Panasonic Corporation | Optical information recording medium and method for manufacturing the same |
JP5386374B2 (ja) * | 2008-01-31 | 2014-01-15 | パナソニック株式会社 | 光学的情報記録媒体及びその製造方法 |
WO2010110412A1 (ja) * | 2009-03-27 | 2010-09-30 | 日鉱金属株式会社 | Ti-Nb系酸化物焼結体スパッタリングターゲット、Ti-Nb系酸化物薄膜及び同薄膜の製造方法 |
JP5349583B2 (ja) * | 2009-03-27 | 2013-11-20 | Jx日鉱日石金属株式会社 | Ti−Nb系酸化物焼結体スパッタリングターゲット、Ti−Nb系酸化物薄膜及び同薄膜の製造方法 |
TWI424074B (zh) * | 2009-03-27 | 2014-01-21 | Jx Nippon Mining & Metals Corp | Ti-Nb-based sintered body sputtering target, Ti-Nb-based oxide thin film, and method for producing the same |
WO2011024381A1 (ja) * | 2009-08-31 | 2011-03-03 | パナソニック株式会社 | 情報記録媒体とその製造方法 |
US8323763B2 (en) | 2009-08-31 | 2012-12-04 | Panasonic Corporation | Information recording medium and method for producing the same |
Also Published As
Publication number | Publication date |
---|---|
CN101496104B (zh) | 2010-12-01 |
US20090086608A1 (en) | 2009-04-02 |
TW200805356A (en) | 2008-01-16 |
JP4750844B2 (ja) | 2011-08-17 |
JP2011081909A (ja) | 2011-04-21 |
JPWO2007119439A1 (ja) | 2009-08-27 |
CN101496104A (zh) | 2009-07-29 |
JP5058346B2 (ja) | 2012-10-24 |
US8088464B2 (en) | 2012-01-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5560261B2 (ja) | 情報記録媒体 | |
KR100531538B1 (ko) | 광학적 정보기록매체와 그 제조방법 | |
WO2006132076A1 (ja) | 情報記録媒体とその製造方法 | |
WO2007063687A1 (ja) | 情報記録媒体とその製造方法 | |
JP4996607B2 (ja) | 情報記録媒体とその製造方法、及びスパッタリングターゲット | |
JP4834666B2 (ja) | 情報記録媒体およびその製造方法 | |
JP5058346B2 (ja) | 情報記録媒体およびその製造方法 | |
EP1542217A1 (en) | Optical information recording medium and production method therefor | |
WO2009096165A1 (ja) | 光学的情報記録媒体とその製造方法、及びターゲット | |
JP4316506B2 (ja) | 光学的情報記録媒体およびその製造方法 | |
WO2011024381A1 (ja) | 情報記録媒体とその製造方法 | |
JP5386374B2 (ja) | 光学的情報記録媒体及びその製造方法 | |
WO2006051645A1 (ja) | 情報記録媒体とその製造方法 | |
US8685518B2 (en) | Information recording medium and method for producing same | |
WO2007088682A1 (ja) | 情報記録媒体およびその製造方法、並びにその製造装置 | |
WO2008053792A1 (fr) | Support d'enregistrement d'informations, son procédé de fabrication, et cible de pulvérisation pour former un support d'enregistrement d'informations | |
JP5226537B2 (ja) | 情報記録媒体およびその製造方法、スパッタリングターゲットならびに成膜装置 | |
JP5838306B2 (ja) | 情報記録媒体とその製造方法 | |
WO2006112165A1 (ja) | 光学的情報記録媒体とその製造方法 | |
JP2007323743A (ja) | 相変化型光記録媒体 | |
KR20110086668A (ko) | 정보 기록 매체, 기록 장치, 재생 장치 및 재생 방법 | |
JP4086689B2 (ja) | 光学的情報記録媒体とその製造方法 | |
WO2006057116A1 (ja) | 情報記録媒体とその製造方法 | |
JP2007095235A (ja) | 光記録媒体 | |
JP2007310940A (ja) | 相変化型光記録媒体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780012407.4 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07739040 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008510819 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12295083 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2176/MUMNP/2008 Country of ref document: IN |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 07739040 Country of ref document: EP Kind code of ref document: A1 |