JP2005032392A - Optical information recording medium and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that there is a possibility of deforming and disconnecting an antenna coil when the antenna coil and an integrated circuit device are mounted on an optical information recording medium. <P>SOLUTION: The optical information recording medium is provided with: a substrate which is a flat plate of a prescribed thickness; a reflection film; the integrated circuit device; and the antenna coil which receives the signal transmitted from the outside by electromagnetic induction and supplies the signal to the integrated circuit device and/or transmits the signal from the integrated circuit device to the outside. The antenna coil is formed, on the substrate, of the same material as the material of the reflection film. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical information recording medium and a method for manufacturing the same.

  Optical information recording media such as CDs and DVDs are widely used as recording media for programs and data. Optical information recording media records data by providing recesses called pits, but pits are provided on a substrate by injection molding of resin using a stamper, so when manufacturing many optical information recording media, all The same information is recorded. In addition, there is a risk that illegal copy products may be made because the data can be easily rewritten on an optical information recording medium. In order to prevent this, a technology that provides an integrated circuit element and an antenna coil in the recording medium, stores data for specifying the recording medium and security data in the integrated circuit element, and transmits / receives data to / from the outside to prevent duplication. It has been known.

A conventional optical information recording medium has a structure in which an antenna coil and an integrated circuit element are embedded in a substrate, or an antenna coil and an integrated circuit element prepared separately are mounted on a substrate and sealed with resin ( For example, see Patent Document 1).
JP-A-11-161551 (FIGS. 2 and 3)

  However, the antenna coil mounted on the optical information recording medium is not only thin and low in rigidity, but also when the antenna coil prepared separately is placed on the substrate and then embedded or sealed on the substrate with resin. May be deformed or disconnected.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an optical information recording medium that can be formed on a substrate with high accuracy without causing damage such as deformation and disconnection of an antenna coil.

  The optical information recording medium of the present invention is a substrate having a predetermined thickness, a reflective film, an integrated circuit element, a signal transmitted from outside by electromagnetic induction, and a signal supplied to the integrated circuit element. Alternatively, an antenna coil for transmitting a signal from the integrated circuit element to the outside is provided, and the antenna coil is formed on the substrate with the same material as the reflective film.

  In addition, a substrate that is a flat plate having a predetermined thickness, a reflective film, an integrated circuit element, and a signal transmitted from the outside by electromagnetic induction, and a signal is supplied to the integrated circuit element and / or from the integrated circuit element And an antenna coil that transmits the above signal to the outside, and the antenna coil is formed on the substrate by vapor deposition.

  The optical information recording medium of the present invention includes a substrate having a predetermined thickness, a substrate, an integrated circuit element, and a protrusion formed on the substrate, and a conductor is fixed on the protrusion by electromagnetic induction. An antenna coil is formed which receives a signal transmitted from the outside, supplies a signal to the integrated circuit element, and / or transmits a signal from the integrated circuit element to the outside.

  The optical information recording medium of the present invention has a substrate having a predetermined thickness, a substrate, an integrated circuit element, and a groove formed on the substrate. A conductor is fixed on the groove and externally applied by electromagnetic induction. An antenna coil is formed which receives a signal to be transmitted, supplies a signal to the integrated circuit element, and / or transmits a signal from the integrated circuit element to the outside.

  Further, a reflective film is provided on the substrate, and the conductor is made of the same material as the reflective film.

  The manufacturing method of the optical information recording medium of the present invention is the same as the step of molding a substrate having pits at predetermined positions on the surface by injection molding, on the pit formed on the surface of the substrate and on the part where the antenna coil is formed. Forming a conductive film of material directly on the substrate, and forming the formed reflective film as an antenna coil and a reflective film; mounting an integrated circuit element on the conductive film corresponding to the antenna coil; and Forming a protective film on the substrate so as to cover the conductor film corresponding to the antenna coil, the integrated circuit element, and the conductor film corresponding to the reflective film;

  In the step of forming a conductor film directly on the substrate on the pit formed on the substrate surface and a portion where the antenna coil is formed, and using the formed conductor film as an antenna coil and a reflective film, the antenna The conductor corresponding to the coil and the conductor film corresponding to the reflective film are simultaneously formed by vapor deposition.

  Further, in the step of molding a substrate having pits at predetermined positions on the surface by injection molding, a substrate having projections is formed on a portion where the antenna coil is formed, and the antenna coil on the pit formed on the substrate surface In the step of directly forming a conductor film on the substrate where the conductor is formed, and using the formed conductor film as an antenna coil and a reflective film, the conductor film corresponding to the antenna coil is transferred to the projection Form on top.

  Further, in the step of molding a substrate having pits at predetermined positions on the surface by injection molding, a substrate having a groove is formed in a portion where the antenna coil is formed, and the antenna coil is formed on the pit formed on the substrate surface. In the step of forming a conductive film directly on the substrate to be formed and using the formed conductive film as an antenna coil and a reflective film, a viscous conductive material is allowed to flow into the groove and then cured. Thereby, a conductor film corresponding to the antenna coil is formed in the groove.

  In the present invention, since the antenna coil is directly formed on the substrate by vapor deposition or transfer, the antenna coil can be easily formed with high accuracy without causing deformation, disconnection, or the like on the substrate. Multi-function optical information recording media such as prevention of duplication of recorded data and restriction of data use are obtained by transmitting and receiving individual data and security information on the recording medium via an antenna coil mounted with an integrated circuit element. It is done.

  The method for producing an optical information recording medium of the present invention is a method for producing an optical information recording medium, the step of molding a substrate having pits at predetermined positions on the surface by injection molding, the substrate formed on the surface of the substrate A conductor film made of the same material is directly formed on the substrate on the pit and the part where the antenna coil is formed, and the formed reflecting film is used as an antenna coil and a reflecting film, and a conductor film corresponding to the antenna coil is formed. A step of mounting an integrated circuit element thereon, and a step of forming a protective film on the substrate so as to cover the conductor film corresponding to the antenna coil, the integrated circuit element, and the conductor film corresponding to the reflective film Since the conductor film is formed directly on the substrate, the antenna coil can be formed with high accuracy and ease without causing damage such as deformation or disconnection on the substrate. Therefore, there is a multifunctional optical information recording medium equipped with an integrated circuit element that prevents the duplication of recorded data and restricts the use of data by transmitting and receiving individual data and security information of the recording medium through an antenna coil. Easy to manufacture.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a plan view showing an optical information recording medium, and FIG. 2 is a sectional view thereof. 1 and 2, reference numeral 1 denotes a disk-like substrate molded from a resin such as polycarbonate, and a pit (not shown) is molded on one surface 1a. A reflective film 2 is formed on the surface 1a on which the pits are formed, and a protective film 3 is formed thereon. An antenna coil 4 is formed of the same material as that of the reflection film 2 in the vicinity of the center on the surface 1 a of the substrate 1. An integrated circuit element 5 is mounted on the substrate 1 and is connected to the end of the antenna coil 4. These basic configurations are equivalent to the conventional ones.

  The manufacturing process of the optical recording information recording medium of the first embodiment is shown in FIG. In FIG. 3, first, a disk-shaped substrate 1 is formed by injection molding (FIG. 3A). Pits are formed on the surface 1a at the time of molding. Masking (not shown) on the surface 1a so as to leave the portion where the pits are formed on the surface 1a and the antenna coil shape, and fixing a conductor film such as aluminum on the surface 1a of the substrate 1 by vapor deposition, The reflective film 2 and the antenna coil 4 are formed simultaneously (FIG. 3B). An integrated circuit element 5 is mounted on the substrate 1 and a protective film 3 is applied (FIG. 3C).

  The integrated circuit element 5 receives a signal transmitted from the outside by electromagnetic induction through the antenna coil 4, receives power supply, and transmits and receives data.

  According to this embodiment, since the antenna coil 4 is fixed directly on the substrate 1 by vapor deposition, it can be formed without causing deformation or disconnection. Further, since it is formed at the same time as the reflective film 2, a low-cost antenna coil configuration is possible.

(Embodiment 2)
FIG. 4 is a sectional view showing an optical information recording medium. In FIG. 4, reference numeral 1 denotes a disk-shaped substrate molded from a resin such as polycarbonate, and pits (not shown) are molded on one surface 1a. A reflective film 2 is formed on the surface 1a on which the pits are formed, and a protective film 3 is formed thereon. Near the center of the substrate 1, when the substrate 1 is molded, a projection 1b is formed simultaneously with the pits. The protrusion 1b has the shape of the antenna coil 4. A conductor such as copper is fixed on the protrusion 1b to form the antenna coil 4. An integrated circuit element 5 is mounted on the substrate 1 and is connected to the end of the antenna coil 4. These basic configurations are equivalent to the conventional ones.

  A manufacturing process of the optical information recording medium according to the second embodiment is shown in FIG. 5. In FIG. 5, a disk-shaped substrate 1 is first formed by injection molding. A protrusion 1b is formed on a portion where the antenna coil 4 is formed on the surface 1a during molding (FIG. 5A). A conductive film is deposited on the surface 1a where the pits are formed, or a viscous conductive material is deposited by transfer and then cured to form a reflective film, and the viscous conductive material is transferred by transfer. The antenna coil 4 is formed after being deposited on the protrusion 1b and then cured (FIGS. 5B and 5C). An integrated circuit element 4 is mounted on the substrate 1 and a protective film 3 is applied (FIG. 5D).

  In the second embodiment, the protrusion 1b is provided on the surface 1a. However, by forming grooves on both sides of the portion where the antenna coil 4 is formed, the protrusion is formed on a surface lower than the surface 1a as shown in FIG. By providing the portion 1b, the protruding amount of the antenna coil 4 from the surface 1a can be reduced. In this way, since the integrated circuit element 4 can be brought closer to the substrate 1, the thickness of the optical recording medium can be made thinner.

  In the second embodiment, the protrusion 1b and the antenna coil 4 are provided on the surface 1a on which the pits are formed, but may be provided on the back surface opposite to the surface 1a.

  In the second embodiment, the antenna coil 4 is formed of a conductor such as copper. However, the antenna coil 4 may be formed of the same material as the reflective layer 2.

  Since the antenna coil 4 is directly fixed on the substrate 1 according to this embodiment, it can be formed without causing deformation or disconnection. Further, since the shape of the antenna coil 4 is formed on the substrate 1, the antenna coil 4 is not deformed.

(Embodiment 3)
FIG. 7 is a sectional view showing an optical information recording medium. In FIG. 7, reference numeral 1 denotes a disk-shaped substrate molded from a resin such as polycarbonate, and pits are molded on one surface 1a. A reflective film 2 is formed on the surface 1a on which the pits are formed, and a protective film 3 is formed thereon. A groove 1c is formed near the center of the substrate 1 simultaneously with the pits when the substrate 1 is molded. The groove 1c has the shape of the antenna coil 4. A conductor such as copper is fixed on the groove 1c, and the antenna coil 4 is formed. An integrated circuit element 5 is mounted on the substrate 1 and is connected to the end of the antenna coil 4.

  The manufacturing process of the optical information recording medium of Embodiment 3 is shown in FIG. In FIG. 8, a disk-shaped substrate 1 is first molded by injection molding. A groove 1c having the same shape as the antenna coil 4 is formed on the surface 1a at the time of molding (FIG. 8A). A viscous conductor is allowed to flow into the groove 1c and then cured to form the antenna coil 4 (FIGS. 8B and 8C). An integrated circuit element 5 is mounted on the substrate 1 and a protective film 3 is applied (FIG. 8D).

  In Embodiment 3, the groove portion 1c and the antenna coil 4 are provided on the surface 1a on which the pits are formed, but may be provided on the back surface opposite to the surface 1a.

  In the third embodiment, the antenna coil 4 is formed of a conductor such as copper. However, the antenna coil 4 may be formed of the same material as the reflective layer 2.

  In the third embodiment, the antenna coil 4 is formed of a viscous conductor, but a conductor formed in the same shape as the groove 1c in advance may be inserted and fixed in the groove 1c.

  Since the antenna coil 4 is directly fixed on the substrate 1 according to this embodiment, it can be formed without causing deformation or disconnection. Further, since the shape of the antenna coil 4 is formed on the substrate 1, the antenna coil 4 is not deformed.

  In the first, second, and third embodiments, the antenna coil is disposed concentrically with the substrate near the center of the substrate, but may be disposed non-concentrically as shown in FIG. In other words, the antenna coil 4 has a circular pattern similar to the outer periphery (or inner periphery) as shown in FIG. 1, but as shown in FIG. 9, the antenna coil 4 has an annular shape in a part of the region (semicircular region of the inner periphery). The pattern may be as follows.

  In the first, second and third embodiments, the substrate is disk-shaped, but may be other shapes such as a rectangle.

  In the first, second, and third embodiments, the antenna coil and the integrated circuit element are disposed near the center of the substrate, but may be disposed near the outer periphery of the substrate.

  In the first, second, and third embodiments, the number of substrates is one, but a configuration in which a plurality of substrates is bonded may be used.

  The present invention relates to an optical information recording medium and a method for manufacturing the same, an optical information recording medium used in an information processing apparatus for recording / reproducing optical information, and an apparatus for manufacturing the optical information recording medium. Is possible.

1 is a plan view showing an optical information recording medium according to Embodiment 1 of the present invention. Sectional drawing which shows the optical information recording medium by Embodiment 1 of this invention The figure which shows the manufacturing process of the optical information recording medium by Embodiment 1 of this invention. Sectional drawing which shows the optical information recording medium by Embodiment 2 of this invention The figure which shows the manufacturing process of the optical information recording medium by Embodiment 2 of this invention. Sectional drawing which shows the other example of the optical information recording medium by Embodiment 2 of this invention Sectional drawing which shows the optical information recording medium by Embodiment 3 of this invention The figure which shows the manufacturing process of the optical information recording medium by Embodiment 3 of this invention. The top view which shows the other example of the optical information recording medium by Embodiment 3 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Board | substrate 2 Reflective film 3 Protective film 4 Antenna coil 5 Integrated circuit element

Claims (9)

A substrate that is a flat plate having a predetermined thickness, a reflection film, an integrated circuit element, and a signal transmitted from the outside by electromagnetic induction to supply a signal to the integrated circuit element and / or a signal from the integrated circuit element An optical information recording medium, comprising: an antenna coil for transmitting to the outside, wherein the antenna coil is formed on the substrate with the same material as the reflective film. A substrate that is a flat plate having a predetermined thickness, a reflection film, an integrated circuit element, and a signal transmitted from the outside by electromagnetic induction to supply a signal to the integrated circuit element and / or a signal from the integrated circuit element The optical information recording medium according to claim 1, further comprising an antenna coil for transmitting the signal to the outside, wherein the antenna coil is formed on the substrate by vapor deposition. A substrate that is a flat plate of a predetermined thickness, an integrated circuit element, and a protrusion formed on the substrate, a conductor is fixed on the protrusion, and a signal transmitted from the outside by electromagnetic induction is received. An optical information recording medium comprising an antenna coil for supplying a signal to the integrated circuit element and / or transmitting a signal from the integrated circuit element to the outside. A substrate that is a flat plate having a predetermined thickness, an integrated circuit element, and a groove formed on the substrate, a conductor is fixed on the groove, and a signal transmitted from the outside by electromagnetic induction is received and the integrated An optical information recording medium comprising an antenna coil for supplying a signal to a circuit element and / or transmitting a signal from the integrated circuit element to the outside. 5. The optical information recording medium according to claim 3, further comprising a reflective film on the substrate, wherein the conductor is made of the same material as the reflective film. A method for producing an optical information recording medium, comprising:
Molding a substrate having pits at predetermined positions on the surface by injection molding;
Forming a conductive film of the same material directly on the substrate on the pit formed on the substrate surface and the portion where the antenna coil is formed, and forming the formed reflective film as an antenna coil and a reflective film;
Mounting an integrated circuit element on a conductor film corresponding to the antenna coil, and covering the conductor film corresponding to the antenna coil, the integrated circuit element, and the conductor film corresponding to the reflective film A method for producing an optical information recording medium, comprising a step of forming a protective film on the substrate. In the process of forming a conductor film directly on the substrate on the pit formed on the substrate surface and the portion where the antenna coil is formed, and forming the conductor film as an antenna coil and a reflection film in the antenna coil 7. The method of manufacturing an optical information recording medium according to claim 6, wherein the corresponding conductor and the conductor film corresponding to the reflective film are simultaneously formed by vapor deposition. In the step of molding a substrate having pits at predetermined positions on the surface by injection molding, molding a substrate having a protrusion on a portion where an antenna coil is formed,
In the step of directly forming a conductor film on the substrate on the pit formed on the substrate surface and a portion where the antenna coil is formed, and using the formed conductor film as an antenna coil and a reflective film, the antenna coil The method for manufacturing an optical information recording medium according to claim 6, wherein a conductor film corresponding to is formed on the protrusion by transfer. In the step of molding a substrate having pits at predetermined positions on the surface by injection molding, molding a substrate having a groove in a portion where the antenna coil is formed,
In the step of forming a conductor film directly on the substrate on the pit formed on the substrate surface and a portion where the antenna coil is formed, and using the formed conductor film as an antenna coil and a reflective film, 7. The method of manufacturing an optical information recording medium according to claim 6, wherein a conductive film corresponding to the antenna coil is formed in the groove portion by allowing a viscous conductor to flow and then curing.

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