EP1714279A2 - Procede pour revetir un support de donnees optique, et support de donnees optique revetu - Google Patents

Procede pour revetir un support de donnees optique, et support de donnees optique revetu

Info

Publication number
EP1714279A2
EP1714279A2 EP05715332A EP05715332A EP1714279A2 EP 1714279 A2 EP1714279 A2 EP 1714279A2 EP 05715332 A EP05715332 A EP 05715332A EP 05715332 A EP05715332 A EP 05715332A EP 1714279 A2 EP1714279 A2 EP 1714279A2
Authority
EP
European Patent Office
Prior art keywords
layer
data carrier
substrate
additional layer
optical data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP05715332A
Other languages
German (de)
English (en)
Inventor
Christian Buske
Alexander Knospe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plasmatreat GmbH
Original Assignee
Plasmatreat GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Plasmatreat GmbH filed Critical Plasmatreat GmbH
Publication of EP1714279A2 publication Critical patent/EP1714279A2/fr
Ceased legal-status Critical Current

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
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • 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
    • G11B7/24056—Light transmission layers lying on the light entrance side and being thinner than the substrate, e.g. specially adapted for Blu-ray® discs
    • 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
    • G11B7/254—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 protective topcoat layers
    • G11B7/2548—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 protective topcoat layers consisting essentially of inorganic materials

Definitions

  • the invention relates to a method for coating an optical data carrier.
  • the invention relates to a method in which an additional layer is applied as a transparent barrier layer or as an at least partially reflective reflection layer to at least one substrate layer of the data carrier.
  • the invention also relates to an optical data carrier coated with an additional layer acting as a barrier layer or as an at least partially reflective reflection layer.
  • optical data carriers information, images, music and / or video films are stored and reproduced.
  • the optical data carriers are designed as a compact disc (CD), as a super audio CD (SACD) or as a digital versatile disc (DVD).
  • CD compact disc
  • SACD super audio CD
  • DVD digital versatile disc
  • the invention is not restricted to this type of optical data carrier; other data formats can also be conveyed using the optical data carriers.
  • the known optical data carriers consist of circular disks which have at least one substrate layer and at least one at least partially reflective reflection layer.
  • Thermoplastic materials are used for the substrate, mostly polycarbonate.
  • polyolefin can also be used as the substrate, but this is more expensive.
  • Silver is generally used for the reflective layer.
  • the substrate layers are produced by injection molding technology, the data structure of the data tracks and possibly the lands and pits being impressed by predetermined injection molds.
  • injection molding technology With injection molding technology, the curing time of the injection molding material is a decisive criterion for the efficiency of the entire manufacturing process.
  • the reflection layer made of silver is sputtered onto the corresponding substrate layer by means of a low-pressure plasma coating.
  • the vacuum or vacuum technology required for this is on the one hand complex, and on the other hand the sputtering process is a time-consuming measure that reduces the efficiency of the manufacturing process.
  • the silver used is a significant cost factor.
  • the finished optical data media must have a high level of shape stability, in particular the disks must maintain their flat, flat shape. If the data carriers bend, there may be technical problems in the playback devices.
  • SACD Hybrid Super Audio CD
  • Both substrate layers have a surface which has a data structure and which is provided with an at least partially reflective reflection layer. In contrast, the other surface of each substrate layer is not coated.
  • the two substrate layers After the two substrate layers have been produced separately with reflection layers, these are connected to one another in such a way that both substrate layers are aligned with respect to the reflection layer.
  • the reflection layers and the substrate layers alternate.
  • a first substrate layer is thus provided on one side with the reflection layer and connected on the other side with the reflection layer of the second substrate layer.
  • the side of the second substrate layer arranged opposite the reflection layer is not coated.
  • both substrate layers can attract water to different extents. This causes the Hybrid SACD to bend and become unusable. This effect is further enhanced in the prior art applied layer prevented, which is produced in a complex manner with a low pressure coating process. It is also possible to apply a layer of lacquer.
  • the disadvantage here is the poor connection of the paint to the substrate layer due to surface effects, so that there may be signs of detachment during use.
  • polyolefins are non-polar and therefore only absorb extremely small amounts of water. Therefore, even without a barrier layer, the second substrate layer does not swell and therefore does not deflect the pane.
  • a major disadvantage of using polyolefins is the high cost and the longer processing time in the production compared to polycarbonate.
  • the present invention is therefore based on the technical problem of designing and developing the method for coating an optical data carrier such that the production of the optical data carriers can be carried out more efficiently.
  • the technical problem also concerns optical data carriers that are manufactured more efficiently.
  • a plasma jet is generated by passing a working gas through an excitation zone, into which a precursor material is fed into the plasma jet separately from the working gas. Due to the energy acting on the precursor material in the plasma jet, the molecules are fragmented and energetically excited, so that after these reactive intermediates have been deposited on the surface of the substrate, a new polymer-like layer can be formed by creating new chemical bonds.
  • the plasma jet is advantageously generated under atmospheric pressure and has a low temperature. Because the plasma jet itself for one
  • Precursor materials that are only stable at temperatures up to 200 ° C or less.
  • Hexamethyldisiloxane is preferably used as the precursor material and SiO x is deposited as the reaction product, where x is in the range from 1 to 3, preferably in the range from 1.5 to 2.5.
  • the deposited layer has good optical transparency so that it can be used advantageously in optical data carriers as a barrier layer, for example against the ingress of moisture, or as a protective layer, for example for protection against scratching.
  • the function of the protective layer can be seen above all in preventing warping of the substrate of the optical data carrier. Because a warping of the data carrier would lead to an unusability from a certain degree of warping. Whether the protective layer as a barrier layer prevents warping by reducing the absorption of moisture in order to reduce or completely prevent the above-described swelling of the additional layer, or whether the barrier layer also or above all by mechanical forces regardless of the degree of moisture of the additional layer Success achieved can remain open. In any case, the additional layer according to the invention brings about increased stability of the optical data carrier.
  • layers are highly hydrophilic antifog layers, which prevent the packaging films from fogging from the inside; Layers with extremely low surface tension, which are highly water-repellent and can have a so-called "easy to clean" effect; layers on metals that have an anti-corrosive effect and can also improve adhesion; and conductive layers that prevent static charging of surfaces.
  • precursor materials are tetraethoxysilane, tetramethoxysilane, methyltrimethoxysilane.
  • silanes and siloxanes can be used that are liquid at room temperature and can be evaporated without decomposition.
  • the additional layer is at least partially optically transparent and can therefore be arranged in the optical path of the laser beam during the reading and / or writing process.
  • the additional layer can be deposited on the substrate layer as a reflection layer.
  • the optical properties of the deposited material are adjusted such that, for example, the additional layer has a refractive index that is different from the refractive index of the substrate material.
  • the additional layer can thus be used as an at least partially reflective layer which avoids the conventional silver layer. This is associated with great cost savings since both the low-pressure technology and the expensive material are avoided.
  • the method according to the invention can be used instead of the low-pressure coating with silver.
  • the atmospheric plasma coating considerably reduces the technical effort.
  • the expensive silver can be replaced by another inexpensive metal.
  • energy is supplied for post-treatment of the additional layer with the aid of a second atmospheric plasma jet. Therefore, the advantages of atmospheric plasma coating and surface treatment using an intense atmospheric plasma jet are combined.
  • a hybrid super audio CD (hybrid SACD) is coated as an optical data carrier with two substrate layers each having an at least partially reflective reflection layer.
  • the second side of one of the two substrate layers facing away from the reflection layer is coated with the additional layer.
  • This is preferably used for substrate layers made of polycarbonate, so that the additional layer can be used as a barrier layer against the penetration of moisture.
  • Fig. 3 is a perspective view of a hybrid Super Audio CD with two substrate layers and two reflection layers and
  • Fig. 4 in cross section a part of a hybrid Super Audio CD with and without the additional layer according to the invention.
  • 1 to 3 show optical data carriers known from the prior art.
  • the CD has a transparent substrate layer 2, on the surface of which groove-shaped depressions 4 are made.
  • the information (pits and lands) is embossed in the depressions 4 by a surface structure of the bottom of the groove.
  • the surface of the substrate layer 2 is provided with a very thin reflection layer 6, which is shown only as a line in FIG. 1.
  • An additional protective layer 8 is provided above the reflection layer 6, on which a label 10 is finally applied.
  • FIG. 2 shows a cross section through a two-layer DVD with two substrate layers 2 and 3, in the mutually facing surfaces of which groove-shaped depressions 4 and 5 are made.
  • the surfaces are provided with very thin reflection layers 6 and 7 shown only as a line in FIG. 1. This will send a laser beam to the Reflection layers 6 and 7 are reflected, so that the information contained in the pits and lands of both information layers can be read out by changes in the reflected intensity of the laser beam.
  • the surfaces having the groove-shaped depressions are connected to one another by a spacer layer 12.
  • hybrid SACD has two information layers with different data formats. These are a first information layer that can be read with a CD reader (CD layer) and a second information layer with a higher data density (HD layer).
  • a first substrate layer 2 is provided on the upper surface with groove-shaped depressions (not shown in detail) which has the information in high data density (HD layer).
  • This surface has a partially reflective coating that is transparent to light with a wavelength of 780 nm, but is reflective to light with a wavelength of 650 nm.
  • an adhesive spacer layer 12 which is connected to a second substrate layer 3, the upper surface of which in turn has the groove-shaped depressions with the data in the CD format.
  • This surface is also provided with a reflective coating.
  • a protective layer 14 with a sticker or imprint is provided at the top.
  • FIG. 3 An asymmetry results from the structure shown in FIG. 3 in comparison, for example, with that in FIG. 2 shown structure. If a moisture-attracting material is used for the lower substrate layer 2, then over time the substrate layers 2 and 3 swell unevenly and, associated therewith, a change in shape which leads to the data carrier being unusable. The process of the uneven penetration of moisture is illustrated in FIG. 4 in the right half of the hybrid SACD shown.
  • the upper protective layer 14 prevents water from penetrating into the upper substrate layer 3.
  • the underside of the substrate layer 2 is open to the ambient air, so that water can penetrate.
  • FIG. 4 An example of this is shown in FIG. 4 in the left half of the hybrid SACD shown.
  • the two substrate layers 2 and 3 are made of polycarbonate and the additional layer 16 has SiO x , which has been deposited on the surface by means of an atmospheric plasma jet from the precursor material hexamethyldisiloxane by the process according to the invention.
  • the parameter x is in the range from 1 to 3, preferably in the range from 1.5 to 2.5.
  • the additional layer made of SiO x (glass) can actually also be referred to as an organosilicon layer, since SiO x generally contains about 1% carbon. In any case, the layer has transparent optical properties. Thus, despite the additional layer 16, it is possible to use the hybrid 4 to be read from below using a laser beam.
  • optical data carrier Another example of an optical data carrier according to the invention is that the at least one substrate layer 2 or 3 is coated with an at least partially reflective additional layer.
  • This additional layer can serve, for example, as a protective layer 8 in FIG. 1 or as a spacer layer 12 in FIG. 2 or FIG. 3. If the material applied by the plasma deposition has a refractive index which deviates from the refractive index of the substrate material to such an extent that there is sufficient reflection at the boundary layer between the two layers, then the reflective metal layer made of silver known from the prior art can be omitted ,
  • the additional layer may have a metal.
  • the additional layer replaces the reflective layer made of silver and the protective layers or spacing layers previously provided are still provided in the layer structure of the optical data carrier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Abstract

La présente invention concerne un procédé pour revêtir un support de données optique, le support de données optique présentant au moins une couche substrat et au moins une couche réfléchissante, le procédé comprenant les étapes suivantes : un jet de plasma est produit à partir d'un gaz de travail au moyen d'une décharge de plasma atmosphérique, une matière précurseur est ajoutée au gaz de travail ou au jet de plasma et mise en réaction dans le jet de plasma ; et le produit réactionnel obtenu à partir de la matière précurseur, est déposé sur la/les couche(s) substrat en tant que couche supplémentaire. La couche supplémentaire peut d'une part servir de couche de protection ou couche barrière, et d'autre part servir de couche réfléchissante pour la constitution du support de données optique. L'invention a également pour objet un support de données optique comprenant une couche supplémentaire réalisée par revêtement au plasma atmosphérique.
EP05715332A 2004-02-13 2005-02-14 Procede pour revetir un support de donnees optique, et support de donnees optique revetu Ceased EP1714279A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004007439 2004-02-13
PCT/EP2005/001485 WO2005078715A2 (fr) 2004-02-13 2005-02-14 Procede pour revetir un support de donnees optique, et support de donnees optique revetu

Publications (1)

Publication Number Publication Date
EP1714279A2 true EP1714279A2 (fr) 2006-10-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05715332A Ceased EP1714279A2 (fr) 2004-02-13 2005-02-14 Procede pour revetir un support de donnees optique, et support de donnees optique revetu

Country Status (2)

Country Link
EP (1) EP1714279A2 (fr)
WO (1) WO2005078715A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006015425A1 (de) * 2006-03-31 2007-10-04 Sonopress Gmbh Verfahren zur Herstellung eines mehrschichtigen Körpers, insbesondere eines optischen Datenträgers
DE102019121452A1 (de) * 2019-08-08 2021-02-11 Plasmatreat Gmbh Verfahren zum Ausrüsten eines elektronischen Displays mit einer Displayschutzscheibe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516178A2 (fr) * 1991-05-30 1992-12-02 Nec Corporation Milieu d'enregistrement d'information optique dans laquel une couche protectrice contient une couche de mélange ZnS et SiO2
WO2000070606A1 (fr) * 1999-05-14 2000-11-23 Unaxis Balzers Aktiengesellschaft Procede de production de disques hybriques et disque hybride
WO2003082951A1 (fr) * 2002-03-28 2003-10-09 Teijin Chemicals, Ltd. Copolycarbonate et element resistant a la chaleur comprenant le copolymere

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849296A (en) * 1987-12-28 1989-07-18 Dow Corning Corporation Multilayer ceramic coatings from metal oxides and hydrogen silsesquioxane resin ceramified in ammonia
WO1998044497A1 (fr) * 1997-03-31 1998-10-08 Matsushita Electric Industrial Co., Ltd. Support d'enregistrement optique et son procede de fabrication
JP3411559B2 (ja) * 1997-07-28 2003-06-03 マサチューセッツ・インスティチュート・オブ・テクノロジー シリコーン膜の熱分解化学蒸着法
DE29919142U1 (de) * 1999-10-30 2001-03-08 Agrodyn Hochspannungstechnik G Plasmadüse
US7223520B2 (en) * 2003-02-03 2007-05-29 General Electric Company Limited play optical media device with barrier layers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0516178A2 (fr) * 1991-05-30 1992-12-02 Nec Corporation Milieu d'enregistrement d'information optique dans laquel une couche protectrice contient une couche de mélange ZnS et SiO2
DE69218292T2 (de) * 1991-05-30 1997-06-26 Nec Corp Optischer Informationsaufzeichnungsträger in welchem eine Schutzschicht eine aus ZnS und SiO2 bestehende Mischungsschicht enthält
WO2000070606A1 (fr) * 1999-05-14 2000-11-23 Unaxis Balzers Aktiengesellschaft Procede de production de disques hybriques et disque hybride
US20020142099A1 (en) * 1999-05-14 2002-10-03 Martin Dubs Method for producing a hybrid disk and hybrid disks
WO2003082951A1 (fr) * 2002-03-28 2003-10-09 Teijin Chemicals, Ltd. Copolycarbonate et element resistant a la chaleur comprenant le copolymere

Also Published As

Publication number Publication date
WO2005078715A3 (fr) 2005-10-20
WO2005078715A2 (fr) 2005-08-25

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