• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An optical recording medium as shown in Figure 3 containing a light-absorbing film 32 of refractory material less than 60 nm thick and which is sufficiently plastic to allow plastic information upon localized heating is provided for exposure to a focused laser beam 20, whereupon localized heating of the light-absorbing film enables information storage in the form of localized protuberances 38 in the heated areas which can subsequently be optically detected and can be used as a master information record for replication purposes.
    公开号:SU1313361A3
    申请号:SU823394502
    申请日:1982-02-12
    公开日:1987-05-23
    发明作者:Нютон Мэффитт Кент；Брустер Роббинс Виллиям；Фрэнцис Виллсон Ричард
    申请人:Миннесота Майнинг Энд Мануфекчуринг Компани (Фирма)；
    IPC主号:
    专利说明:

    113
    The invention relates to computer technology, namely to storage devices in which information is recorded by an optically focused carrier laser containing a radiation-absorbing film, in particular to such information carriers that do not require manifestation (further processing) after exposure, directly after exposure, such a carrier is ready for reproduction, i.e. direct reading after writing.
    The purpose of the invention is to increase the reliability of the carrier for recording information by a focused laser beam by increasing the signal / noise ratio due to the achievement of minimum reflection and maximum carrier absorption of the read optical radiation.
    FIG. 1 shows an embodiment of a carrier for recording information with a focused laser beam, the cross section in FIG. 2 shows another embodiment of the carrier, a cross section; in fig. 3 - the same, a bulge (thickening) is formed in the carrier after exposure to it by focused laser radiation.
    The information carrier (Fig. 1) contains a glass substrate 1 on which a reflective layer 2 and a dielectric separation layer 3 are successively applied, and a light absorbing layer 4 is applied on top of the latter. The laser beam 5 is directed onto the surface of the carrier, and it is modulated according to with information to be recorded. The irradiated area 6 of the carrier is deformed, the image of the bulge (thickening) corresponding to the recorded information.
    In various embodiments of the carrier according to the invention, the thickness of each individual layer can vary over a considerable range. Therefore, for example., In FIG. 1, the reflecting layer 2 is shown relatively thin, for example, a layer of printed aluminum tol. approximately 30 nm thick, the optical separation layer 3 is much thicker, for example, an acrylate polymer layer is approximately 250 nm thick, and the light absorbing layer 4 is relatively thin, for example, a deposited layer of amorphous carbon, approximately 15 nm thick.
    five
    0
    five
    36
    0

    five
    5 0 5
    0
    12
    In another embodiment, the thickness of the layers may be the same as in FIG. 2, in which the substrate 1 is shown coated with a primer layer 7, such as titanium underoxide, whose thickness is approximately 3 nm. On top of the soil layer 7, a reflecting layer 2 of aluminum with a thickness of 30 nm is applied, similar to layer 2 (FIG. 1). The optical separation layer 3 covering the reflecting layer 2 can also be made of acrylate polymer, but in this embodiment of the carrier proposed, its thickness is only about 30 nm. In addition, the light absorbing layer 4 (Fig. 1) may be a thin film of carbon, the thickness of which is approximately 15 nm.
    The relative thicknesses of the optical separation layer and the light-absorbing layer are preferably chosen so that their combination creates an effective optical thickness with interferometric properties for the anti-reflective structure that exhibits a maximum optical absorption at a given wavelength. In the embodiment of FIG. 1, the thickness of the dielectric separation layer 3 is selected taking into account the thickness of the absorbing layer 4 so that the minimum reflection occurs at the emission wavelength of 520 and 1560 nm. In contrast, the relative dimensions of the separation and absorption layers (Fig. 2) are such that a single reflection minimum is observed at approximately 500 nm. In both cases, the effective optical thickness created by the combination of these layers is chosen so that the minimum reflection and, therefore, maximum absorption is observed at an incident wavelength of approximately 500 nm.
    In the proposed information carrier, a light absorbing layer 2 is used which contains a reflective material whose thickness is substantially thin, providing plasticity sufficient for deformation during local heating as a result of irradiation with a laser beam. This makes it possible to form a bulge or thickening when the carrier is exposed to a focused laser beam (Fig. 3) in the opposite direction.
    falsity to the formation of grooves or holes in the light absorbing layer in a known carrier. The carrier (Fig. 2) is irradiated, in which a bulge 8 is formed in such a way that the light-absorbing layer 4 separates from the optical separation layer 3, forming a cavity 9 filled with gas between them. The horizontal dimensions of the bulge 8 are usually on the order of about one micron (Fig. 3). FIG. Figure 3 also shows the relative sizes of the corresponding layers in a certain (arbitrary) scale, with the central part of this bulge cut out.
    The proposed storage medium, which forms the convexity, has, compared to the carriers, which form grooves or apertures when recording information, the advantage being that these convexities are clearly distinguishable optically. If the proposed carrier is designed in such a way that it has antireflective interferometric dimensions, the arisen bumps destroy the antireflection characteristics. In particular, the preferred peak height, which has a size of 120 nm (Fig. 3), is such that not only the reflection minimum is destroyed, normally characteristic of undeformed areas, but also the interferometric reflection maximum characteristic of the convexity peak (peak) than an optimally high signal-to-noise ratio is achieved for undeformed and convex regions,
    Thus, a high signal-to-noise ratio is a characteristic property of the proposed information carrier and is usually from 10. to 15 dB higher than that observed for a comparable forming groove or aperture of the carrier when recording information with a focused laser beam. This result is explained by the uniform change in the profile of the protuberances as opposed to the irregularity of the profiles and fractures characteristic of the grooves or holes formed in the known carrier.
    The formation of bulges occurs as a result of gas evolution in the area of contact between the light absorbing and separating layers. Therefore, the optical separation layer
    614
    provided under the absorptive layer is made of a material that easily releases gas when it is locally heated. Recommended materials for this layer contain organic materials like acrylic polymer, polystyrene and similar materials that can be applied or applied with various materials.
    in ways. Although polymeric materials are considered preferable due to their low conductivity and thermal diffusivity and their ability to easily release gas at low temperatures.
    temperatures, a variety of inorganic materials are also allowed. For example, deposited layers of A1 and SiOj proved to be satisfactory gas generators.
    Such layers may contain a sufficient amount of chemically or physically absorbed substances on their surface, which can be turned into gas with local heating.
    Regardless of the specific materials from which the separation layer is made, it is additionally assumed that the latter can be transparent, which creates conditions to maximize reflection from the underlying reflective layer, or alternatively can be colored to help absorb the radiation passing through the absorbing
    layer inside the separation layer and thereby maximize the formation of gaseous products in it.
    The light absorbing layer 4 used in the inventive carrier contains emitting material which has a high melting point. This material can be called
    any solid state at 1700 K. Therefore, if the reflective material of layer 4 does not actually melt, but sublimes, a melting point means a point
    in which such material no longer exists in the solid state. In contrast to the proposed forming grooves or holes, a known carrier contains a light-absorbing layer that melts at relatively low temperatures, and the lower this temperature, the more energy-efficient the carrier. In the proposed media material layer
    five
    2 is deformed without a 1p 5 and the higher the melting point, the better, since the materials with the highest melting points provide the greatest dynamic range when recording information. Such reflective materials usually exhibit a high degree of chemical stability. The proposed carrier remains at the same sensitivity level with increased exposure i x, which makes it possible to carry out sequential recordings over extended periods of time. Similarly, the optical characteristics of the proposed carrier do not change significantly, so that the recorded information, having the appearance of the maxima and minima of the reflection, remains unchanged for long periods of time and exposure. Although preference is given to reflective materials with increased melting points, materials with lower melting points, like some silicides, may be preferable if we take into account the ease of their coating, stability (stability), etc.
    In various embodiments of the invention, the light absorbing layer is preferably made of a reflective material that is either amorphous carbon, or 6opoMj or silicon, and an alloy of them. In a broader sense, the reflecting material can be selected from the group formed by the Hf, Nb, Ta, Ti, WHZr borides, nitrides B, Hf, Ta, Ti and Zr, A1, Hf, Mb carbides, Ta, Ti, V, W and Zr and oxides of Ce, Hf, Mg, Th and Zr, i.e. those borides, nitrides, carbides and oxides, which have a melting point greater than 3000 K, and silicides of Nb, Ta, Ti and W, the melting points of which exceed 2300 K.
    The reflective material of layer 4 can be selected from known reflective substances, alloys, solid solutions, etc., which can be two-component, three-component, etc., in particular such multi-component compositions that can contain different amounts of carbon and oxygen.
    61 6
    In order to improve the adherence (bonding) of the optical recording of the tr; x-layer structure to the substrate, as well as resistance to the environment
    and the homogeneity of the carrier introduced ground layer 7 (Fig. 2 and 3). Such a layer prevents staining, heterogeneity of the application of other layers, which arise as a result of inhomogeneous
    adhesion coefficients, which are insufficiently pure or non-uniform.
    In addition, the recording medium on which information is recorded
    in the form of a set of bumps formed on the outer surface, allows direct tying by contacting the surface bearing the bulge with a polymeric material or matrix to form an imprint (copy) of the convex pattern on the surface of this polymeric material,
    25
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    one . A carrier for recording information with a focused laser beam containing a glass substrate and a reflective layer sequentially placed on it, a dielectric separating layer and a light absorbing layer, the total effective optical density. The thickness of the layers placed on the glass substrate forms an anti-reflecting structure that differs in order to increase the reliability of the carrier, the light absorbing layer is made of a refractory material selected from the group including amorphous carbon, boron, silicon, and their compounds Yeni, and the thickness of the light absorbing layer is from 7.3 to 60 nm.
    [2]
    2. The carrier for recording information by a focused laser beam containing a glass substrate, a light reflecting layer and a dielectric separation layer and a light absorbing layer sequentially arranged on it, the total effective optical thickness of the layers forming an anti reflecting structure,
    characterized in that, in order to increase the reliability of the carrier, a primer layer is inserted into it, sized between the glass substrate and the reflective layer, with 611336161
    than the soil layer is made of oxide and under-titanium oxide moth- ing, the oxide of the material selected from the group, including chromium and oxide.
    Y /// 7/7/7/777/7.
    / 7/7/7/7/7/7 / 7Л -
    h
    X Compiler S.Samutsevich Editor I.Shulla Tehred M. Khodanych Proofreader E.Roshko
    Order 1985/59 Circulation 590 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and Printing Enterprise, Uzhgorod, st. Project, 4
    Fi, b
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP0058496A2|1982-08-25|
    JPS57185198A|1982-11-15|
    ZA82941B|1983-01-26|
    US4430659A|1984-02-07|
    CA1185697A|1985-04-16|
    AU538314B2|1984-08-09|
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    ES8304698A1|1983-03-01|
    BR8200752A|1982-12-21|
    EP0058496B1|1986-07-09|
    EP0058496A3|1982-10-13|
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    DE3271911D1|1986-08-14|
    ES509472A0|1983-03-01|
    MX153410A|1986-10-07|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/234,111|US4430659A|1981-02-13|1981-02-13|Protuberant optical recording medium|
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