JPH11353714A - Optical information recording medium and production of optical information recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify constitution and the stages in a production process by using the same material in forming a reflection film covering an information recording region and antenna coils for information transmission and reception and operating power supply to an electronic circuit which is formed in an information un-recording region and is capable of writing/reading out the information without contact. SOLUTION: The surface of the information recording region 102 of a disk-like substrate 201 is covered by the reflection film 203 consisting of aluminum, gold, silver, copper, etc. The antenna coils 105 connected to the electronic circuit embedded in a recessed part 202 formed in the information un-recording region is spirally formed on the surface formed with the reflection film 203 of the information un-recording region. The antenna coils 105 are formed of the conductive material, such as aluminum, gold, silver or copper, which is the same material as the material used for the reflection film 203. The antenna coils 105 are formed by a technique, such as vapor deposition or sputtering, using a mask member simultaneously with the reflection film 203. The reflection film 203, the antenna coils 105, the electronic circuits, etc., are covered by a protective film 204.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium provided with optical recording information such as a compact disc (hereinafter abbreviated to CD) and a method of manufacturing the same. The present invention relates to an optical information recording medium capable of writing / reading additional information other than optically recorded information and a method for manufacturing the same.

[0002]

2. Description of the Related Art A CD is a read-only optical information recording medium. Recently, as described in JP-A-5-258347, a method for adding rewritable information to a CD, A method of adding secondary individual information has been proposed. JP-A-5-258347 discloses two types of optical disks. The first optical disk is
An EEP-ROM (Electrically Erasa) is stored in an information unrecorded area inside the information recording area where the optically recorded information is recorded.
ble & Programmable-Read Only Memory), and the second optical disc has a configuration in which a magnetic layer is provided in an information non-recording area inside an information recording area.

[0003] However, Japanese Patent Laid-Open Publication No.
The optical disc disclosed in Japanese Patent Publication No. 7 has the following problems. First, in the first optical disc,
Writing information to EEP-ROM and EEP-ROM
The electrode is EE to electrically read information from
There is a problem in that the optical disk must be pulled out from the P-ROM to the optical disk surface, the structure of the optical disk becomes extremely complicated, and the manufacturing cost increases. Further, since data is read and written by bringing the brush head into contact with the electrodes, there is a problem that the configuration of the recording / reproducing apparatus becomes complicated.

The second optical disc requires a magnetic head in addition to an optical pickup used for reproducing information recorded in an information recording area of the optical disc in a recording / reproducing apparatus for recording / reproducing the optical disc. In addition, there is a problem that a drive unit requiring high-precision control is provided in addition to the optical pickup drive unit, and the device becomes complicated and expensive.

An invention for solving the above problems is described in Japanese Patent Application Laid-Open No. 8-161790. FIG. 5 is a schematic diagram showing a planar configuration of a first embodiment of an optical disc disclosed in Japanese Patent Application Laid-Open No. 8-161790.
FIG. 6 is a schematic diagram showing a plan configuration of a second embodiment of the optical disc disclosed in Japanese Patent Application Laid-Open No. 8-161790. FIG. 7 is a schematic diagram showing a plan configuration of a third embodiment of the optical disc disclosed in Japanese Patent Application Laid-Open No. 8-161790. In the figure, reference numeral 501 denotes an optical disk;
2 is an information recording area, 503 is an information non-recording area, 504 is an electronic circuit, 505 is an antenna coil, and 506 is a center hole.

[0006] As shown in FIGS.
The optical disc 501 according to the first to third embodiments disclosed in Japanese Patent No. 61790 has an information recording memory in an information non-recording area 503 between the innermost circumference of the information recording area 502 and the center hole 506. And a means for transmitting and receiving data in a non-contact manner and an electronic circuit 50 in a non-contact manner
Antenna coil 50 as means for supplying operating power of
5 are formed. The antenna coil 505 includes an antenna coil for transmitting and receiving information and an antenna coil for supplying operating power.

Writing of secondary information to the electronic circuit 504 and reading of secondary information from the electronic circuit 504 are performed in a non-contact manner by radio waves. Transmission and reception of signals between the electronic circuit 504 and the recording / reproducing device are performed by the antenna coil 5.
05. The operating power of the electronic circuit 504 is also supplied electromagnetically from the recording / reproducing device in a non-contact manner, and is supplied to the electronic circuit 504 via the antenna coil 505.

An optical disk 50 according to the first embodiment shown in FIG.
Reference numeral 1 denotes an antenna coil 50 that arranges two electronic circuits 504 at symmetrical positions across a center hole 506, transmits and receives information to and from each of the electronic circuits 504, and supplies operating power.
5 is formed in a region where the electronic circuit 504 is not arranged, at a symmetrical position with respect to the center hole 506.

An optical disk 50 according to a second embodiment shown in FIG.
Reference numeral 1 denotes one electronic circuit 504 and an antenna coil 505 for transmitting and receiving information to and from the electronic circuit 504 and supplying operating power.
Are arranged at symmetrical positions with respect to the center hole 506.

An optical disk 50 according to a third embodiment shown in FIG.
Reference numeral 1 denotes an antenna coil 50 that arranges two electronic circuits 504 at symmetrical positions across a center hole 506, transmits and receives information to and from each of the electronic circuits 504, and supplies operating power.
5 is formed concentrically with the center hole 506 on the outer peripheral portion of the information unrecorded area 503.

With the optical disk having the above configuration, writing of information to the electronic circuit 504, reading of information from the electronic circuit 504, and power supply to the electronic circuit 504 can all be performed in a non-contact manner. It is not necessary to provide an electrical contact structure on the surface of the optical disk. Further, in the recording / reproducing apparatus for reproducing the optical disk, a magnetic head or the like is not required, so that there is an effect that the apparatus can be configured with a relatively simple configuration and inexpensively.

[0012]

The optical disk 501 having the conventional electronic circuit 504 and the antenna coil 505 shown in FIGS. 5 to 7 is different from a conventional read-only CD.
Step of embedding electronic circuit 504, antenna coil 505
And a step of attaching the antenna coil 505 to the optical disk 501 are required, so that an increase in manufacturing cost cannot be avoided. Particularly, the antenna coil 505 is formed, and the antenna coil 5
Since the process of attaching the 05 is required to have high accuracy, the process is complicated.

Further, in the above-mentioned conventional optical disk, the electronic circuit 504 and the antenna coil 505 are formed in the information unrecorded area 503. In the reproducing apparatus that reproduces the optical disk 501, the clamper that clamps the optical disk 501 comes into contact with the information unrecorded area 503, so that a defect may occur in the electronic circuit 504 and the antenna coil 505. For this purpose, some measures must be taken to protect the electronic circuit 504 and the antenna coil 505. However, the above-mentioned Japanese Patent Application Laid-Open No. 8-161790 only describes that the electronic circuit 504 and the antenna coil 505 are embedded in the substrate. And details are not disclosed. It is desirable that the steps of the configuration and manufacturing method of the optical disk for protecting the electronic circuit 504 and the antenna coil 505 be as simple as possible.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 of the present application provides an information recording area in which information is recorded as a pit row and an information recording area. A substrate having on one side an unrecorded area that is an area other than the information recorded area, a reflective film covering the information recorded area, and an electron formed in the unrecorded area and capable of contactlessly writing / reading information In an optical information recording medium comprising a circuit and an antenna coil for transmitting and receiving information of the electronic circuit and for supplying operating power, the antenna coil and the reflection film are made of the same material.

According to a second aspect of the present invention, there is provided the optical information recording medium according to the first aspect, further comprising a protective film that covers the reflective film, the antenna coil, and the electronic circuit. is there.

According to a third aspect of the present invention, there is provided a substrate having, on one side, an information recording area in which information is recorded as a pit row and an information non-recording area other than the information recording area; Optical information recording, comprising: a reflective film covering the information, an electronic circuit formed in the information non-recording area and capable of writing / reading information in a non-contact manner, and an antenna coil for transmitting / receiving information and supplying operating power of the electronic circuit. In a method for manufacturing an optical information recording medium for manufacturing a medium, a substrate forming step of forming the substrate, and a mask having a pattern corresponding to a region where the reflective film of the substrate is formed and a region where the antenna coil is formed are formed. A masking step of mounting on a substrate, and forming a reflecting film and an antenna coil on the substrate on which the mask is mounted, simultaneously forming the reflecting film and the antenna coil Extent and is characterized in that comprises an electronic circuit installation step of connecting said antenna coil to placing the electronic circuit on the substrate.

According to a fourth aspect of the present invention, in the optical information recording medium manufacturing method according to the third aspect, there is provided a protective layer forming step of forming a protective film covering the reflective film, the antenna coil and the electronic circuit. It is characterized by the following.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the optical information recording medium and the method for manufacturing the optical information recording medium according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a planar structure of a first embodiment of the optical information recording medium of the present invention. In the figure, 101 is an optical disk, 102 is an information recording area, 10
3 is an information non-recording area, 104 is an electronic circuit, 105 is an antenna coil, 106 is a center hole, 107 is a first terminal, 1
08 is a 2nd terminal part. FIG. 2 is a schematic diagram showing a sectional structure of the first embodiment of the optical information recording medium of the present invention. In the figure, the same parts as those in FIG. 201 is a substrate, 202 is a concave portion, 203 is a reflective film, 2
04 is a protective film. It is assumed that the antenna coil 105 in this embodiment has both functions of data transmission / reception and operation power supply.

As shown in FIG. 1 and FIG.
Reference numeral 01 denotes information provided with non-rewritable information, that is, information recording area 102 in which information is recorded as a pit row, and information between information recording area 102 and center hole 106 in which information is not recorded. It has a disc-shaped substrate 201 provided with an unrecorded area 103 and a recess 202 for embedding the electronic circuit 104 formed in the information unrecorded area 103. The number of recesses 202 is the same as the number of electronic circuits 104 used. In this embodiment, one electronic circuit 104 is provided. The depth of the concave portion 202 and the width in the vertical and horizontal directions are:
Although it is substantially the same as the electronic circuit 104, the dimensions are such that the electronic circuit 104 can be embedded.

The surface of the information recording area 102 of the substrate 201 is covered with a reflective film 203 of aluminum, gold, silver, copper or the like.

The electronic circuit 104 includes a nonvolatile rewritable information recording memory (for example, an EEP-ROM), and includes means for transmitting and receiving data between the electronic circuit 104 and the reproducing device in a non-contact manner. Non-contact electronic circuit 10
Antenna coil 10 as means for supplying operating power to the antenna coil 10
5 is connected via a first terminal 107 and a second terminal 108. Thus, secondary information other than the information recorded in the information recording area 102 can be written to the electronic circuit 104 and the information can be read from the electronic circuit 104.

The antenna coil 105 connected to the electronic circuit 104 is spirally formed on the surface of the unrecorded area 103 where the reflective film 203 is formed. Antenna coil 10
Reference numeral 5 is made of a conductive material such as aluminum, gold, silver, or copper, which is the same as the material used for the reflective film 105. The antenna coil 105 is formed simultaneously with the reflection film 203 by means such as vapor deposition and sputtering using a mask member described later. Then, the reflection film 203, the antenna coil 105, the electronic circuit 104, the first terminal 107 and the second terminal 108 are brought into contact with the outside, and an external shock (for example,
These surfaces are covered with a protective film 204 in order to protect the optical disc 101 from being in contact with a clamper or the like for clamping the optical disc 101 in the reproducing apparatus.

As described above, the electronic circuit 104 and the antenna coil 105 are connected to the first terminal 107 and the second terminal 10.
8, the electronic circuit 1 shown in FIG.
Since the second terminal portion 108 connecting between the antenna coil 105 and the outer peripheral end of the antenna coil 105 is formed across the antenna coil 105, the electronic circuit 104 and the antenna coil 105
The contact portions other than the contact point are made of a conductive material coated with a non-conductive material. That is, as will be described later, the second terminal portion 108 is formed on the reflective film 20 by vapor deposition and sputtering.
Since the antenna coil 105 and the reflection film 203 cannot be formed at the same time, the antenna coil 105 and the reflection film 203 are formed separately.

FIG. 3 is a schematic view showing a planar structure of a second embodiment of the optical information recording medium of the present invention. The present embodiment is an example in which the present invention is applied to an optical disc in which an information recording area is not formed on an outer peripheral portion of a substrate such as a conventional CD-maxi single. In the figure, the same parts as those in FIG. Antenna coil 105 in this embodiment
Have functions of both data transmission and reception and operation power supply.

As shown in FIG. 3, the optical disc 101
An information recording area 102 having non-rewritable information, that is, an information recording area 102 in which information is recorded as a pit row,
A disc-shaped substrate 201 provided with an information unrecorded area 103 in which information is not recorded and an information unrecorded area 103 which is an area on the outer peripheral side than the area 02 and a concave portion for embedding the electronic circuit 104 formed in the information unrecorded area 103. Have. The number of recesses 202 is the same as the number of electronic circuits 104 used.

In this embodiment, one electronic circuit 104 is provided. In the present embodiment, the electronic circuit 104 is installed in the information non-recording area 103 on the outer side of the information recording area 102. However, as in the first embodiment, the information circuit on the inner side of the information recording area 102 is not recorded. It may be set in the recording area 103. The depth of the concave portion 202 and the width in the vertical and horizontal directions are:
Although it is substantially the same as the electronic circuit 104, the dimensions are such that the electronic circuit 104 can be embedded.

The surface of the information recording area 102 of the substrate 201 is covered with a reflective film 203 of aluminum, gold, silver, copper or the like.

The electronic circuit 104 includes a non-volatile rewritable information recording memory (for example, EEP-ROM), means for transmitting and receiving data between the electronic circuit 104 and the reproducing device in a non-contact manner, and Non-contact electronic circuit 10
Antenna coil 10 as means for supplying operating power to the antenna coil 10
5 is connected via a first terminal 107 and a second terminal 108. Thus, secondary information other than the information recorded in the information recording area 102 can be written to the electronic circuit 104 and the information can be read from the electronic circuit 104.

The antenna coil 105 connected to the electronic circuit 104 is spirally formed on the surface of the information non-recording area 103 on the outer peripheral side of the information recording area 102 where the reflective film 203 is formed. The antenna coil 105 includes a reflective film 105
Aluminum, gold, silver, which is the same material used for
It is made of a conductive material such as copper. The antenna coil 105
It is formed simultaneously with the reflective film 203 by means such as vapor deposition and sputtering using a mask member described later. Then, the reflection film 203, the antenna coil 105, the electronic circuit 1
04, the first terminal 107 and the second terminal 108 are covered with a protective film 204 in order to protect the first terminal 107 and the second terminal 108 from contact with the outside, impact from the outside, and the like.

As described above, the electronic circuit 104 and the antenna coil 105 are connected to the first terminal 107 and the second terminal 10.
8, the electronic circuit 1 shown in FIG.
Since the second terminal portion 108 connecting between the antenna coil 105 and the outer peripheral end of the antenna coil 105 is formed across the antenna coil 105, the electronic circuit 104 and the antenna coil 105
The contact portions other than the contact point are made of a conductive material coated with a non-conductive material. That is, as will be described later, the second terminal portion 108 is formed on the reflective film 20 by vapor deposition and sputtering.
Since the antenna coil 105 and the reflection film 203 cannot be formed at the same time, the antenna coil 105 and the reflection film 203 are formed separately.

FIG. 4 is a diagram for explaining an embodiment of a method for manufacturing an optical information recording medium for manufacturing an optical information recording medium according to the first embodiment of the present invention. In the figure, the same portions as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 401 denotes a stamper, 402 denotes a mold, 403 denotes a mask, and 404 denotes an antenna pattern. In this embodiment,
The first terminal 107 shown in FIG. 1 is formed simultaneously with the antenna coil 105, and the second terminal 108 is
The case of forming after forming 5 will be described.

FIG. 4A shows a substrate forming step of forming the substrate 201 by an injection molding machine. A stamper 401 in which recording information is formed as a pit row is attached to a mold 402 of an injection molding machine (not shown). The mold 402 has a convex portion for forming a concave portion 202 for embedding the electronic circuit 104 on the substrate 201. A resin such as polycarbonate is introduced into an injection molding machine to which the stamper 401 is attached at a high pressure to form the substrate 201. By this substrate forming step, a pit row is formed in the information recording area 102, and the electronic circuit 104 is formed in the information non-recording area 103.
The substrate 201 in which the concave portion 202 for embedding is formed is formed.

FIG. 4B is a view showing a masking step of mounting a mask 403 having an antenna pattern 404 corresponding to a region where the antenna coil 105 is formed on the substrate 201. In the mask 403, an antenna pattern 404 corresponding to the antenna coil 105 formed on the substrate 201 is formed as an opening. In the present embodiment, in addition to the antenna pattern 404, an opening corresponding to the first terminal 107 shown in FIG. The outer diameter of the mask 403 is smaller than the inner diameter of the information recording area 102 of the substrate 201 where the pit rows are formed. Mask 40
The substrate 201 on which 3 is mounted is attached to a sputtering device or a vapor deposition device (not shown).

FIG. 4C shows the reflection film 20 formed on the substrate 201 on which the mask 403 is mounted by sputtering or vapor deposition.
FIG. 4 is a diagram showing a reflection film and an antenna coil forming step of simultaneously forming an antenna coil 3 and an antenna coil 105. Reflective film 20
3 and the antenna coil 105 are formed of the same material, for example, aluminum, gold, silver, copper, or the like. That is, the reflective film 203 and the antenna coil 105 can be formed by one-source sputtering using one target or one-source evaporation using one evaporation source. The reflection film 2 is formed in a region outside the region of the substrate 201 covered with the mask 403.
The antenna coil 105 is formed in a region corresponding to the antenna pattern 404 formed as an opening in the mask 403 of the substrate 201. The first terminal 107 is also formed on the substrate 201 at the same time.

FIG. 4D shows that the electronic circuit 10 is mounted on the substrate 201.
FIG. 4 is a diagram showing an electronic circuit installation step of installing the antenna 4 and connecting the antenna coil 105 to the antenna coil 105. The electronic circuit 104 is embedded in the concave portion 202 of the substrate 201. Here, the first terminal portion 107 formed in the previous step is formed so as to be connected to one terminal of the electronic circuit 104. In order to connect another end of the antenna coil 105 to the first terminal 107 and the other terminal of the electronic circuit 104, the second terminal 108 shown in FIG. Will be installed. Here, the second terminal unit 108 is connected to the antenna coil 10.
5 is made of a conductive material covered with a non-conductive material except for the contact between the electronic circuit 104 and the antenna coil 105 so as not to short-circuit with the antenna coil 105.

FIG. 5E shows the electronic circuit 104, the antenna coil 105, and the first terminal 10 formed on the substrate 201.
7 is a diagram showing a protective film forming step of forming a protective film 204 for protecting the second terminal portion 108 and the reflective film 203. FIG. The protective film 204 is made of an ultraviolet curable resin or the like, and is formed by spin coating so as to cover the electronic circuit 104, the antenna coil 105, the first terminal 107, the second terminal 108, and the reflective film 203. In particular, since the electronic circuit 104, the antenna coil 105, the first terminal 107, and the second terminal 108 are likely to come into contact with a clamper of a reproducing apparatus for reproducing the optical disk, cover them with a protective film 204. Accordingly, it is possible to prevent occurrence of a defect due to contact with the clamper or an impact received from the clamper.

[0037]

As described above, in the optical information recording medium of the present invention, since the antenna coil is made of the same material as the reflection film, the antenna coil is formed at the same time as forming the reflection film by a method such as sputtering or vapor deposition. An antenna coil can be formed. Therefore, it can be manufactured more easily than an optical information recording medium provided with a conventional electronic circuit and an antenna coil.

Further, since the optical information recording medium of the present invention has a structure in which the electronic circuit, the antenna coil and the terminal are covered with the protective layer, it is possible to prevent the occurrence of defects due to contact with the outside or an externally applied shock. Can be.

According to the optical information recording medium manufacturing method of the present invention, since the antenna coil is formed by the pattern formed on the mask, the antenna coil can be easily formed in an accurate shape and position.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a planar structure of an optical information recording medium according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a cross-sectional structure of a first embodiment of the optical information recording medium of the present invention.

FIG. 3 is a schematic diagram showing a planar structure of an optical information recording medium according to a second embodiment of the present invention.

FIG. 4 is a view for explaining an embodiment of a method for manufacturing an optical information recording medium for manufacturing the optical information recording medium according to the first embodiment of the present invention.

FIG. 5 is a schematic diagram showing a planar configuration of a first embodiment of an optical disc disclosed in Japanese Patent Application Laid-Open No. 8-161790.

FIG. 6 is a schematic diagram showing a planar configuration of a second embodiment of the optical disc disclosed in Japanese Patent Application Laid-Open No. 8-161790.

FIG. 7 is a schematic diagram showing a planar configuration of a third embodiment of the optical disc disclosed in Japanese Patent Application Laid-Open No. 8-161790.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Optical disk 102 Information recording area 103 Information unrecorded area 104 Electronic circuit 105 Antenna coil 106 Center hole 107 1st terminal part 108 2nd terminal part 201 Substrate 202 Depression 203 Reflection film 204 Protective film 401 Stamper 402 Mold 403 Mask 404 Antenna pattern Reference numeral 501 Optical disk 502 Information recording area 503 Information unrecorded area 504 Electronic circuit 505 Antenna coil 506 Center hole

Claims (4)

[Claims] A substrate having, on one side, an information recording area in which information is recorded as a pit row and an information unrecorded area other than the information recording area; a reflective film covering the information recording area; An optical information recording medium comprising an electronic circuit formed in an unrecorded area and capable of writing and reading information in a non-contact manner, and an antenna coil for transmitting / receiving information and supplying operating power of the electronic circuit, wherein the antenna coil and the antenna An optical information recording medium, wherein the reflection film is made of the same material. 2. The optical information recording medium according to claim 1, wherein
An optical information recording medium comprising: a protective film that covers the reflective film, the antenna coil, and the electronic circuit. 3. A substrate having, on one side, an information recording area in which information is recorded as a pit row and an information unrecorded area other than the information recording area; a reflective film covering the information recording area; Optical information recording medium for producing an optical information recording medium comprising an electronic circuit formed in an unrecorded area and capable of writing and reading information in a non-contact manner, and an antenna coil for transmitting and receiving information and supplying operating power of the electronic circuit In the manufacturing method, a substrate forming step of forming the substrate, a mask step of mounting a mask having a pattern corresponding to an area where the reflective film is formed and an area where the antenna coil is formed on the substrate, Forming a reflective film and an antenna coil on the substrate on which the mask is mounted at the same time; forming the reflective film and the antenna coil on the substrate; An electronic circuit installation step of installing a circuit and connecting the antenna coil to the antenna coil. 4. A method for manufacturing an optical information recording medium according to claim 3, further comprising a protective layer forming step of forming a protective film covering said reflective film, said antenna coil and said electronic circuit. Media manufacturing method.