JP2001319380A - Optical disk with rfid - Google Patents

Optical disk with rfid

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Publication number
JP2001319380A
JP2001319380A JP2000137998A JP2000137998A JP2001319380A JP 2001319380 A JP2001319380 A JP 2001319380A JP 2000137998 A JP2000137998 A JP 2000137998A JP 2000137998 A JP2000137998 A JP 2000137998A JP 2001319380 A JP2001319380 A JP 2001319380A
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Japan
Prior art keywords
film
coil
optical disk
rfid
formed
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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.)
Pending
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JP2000137998A
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Japanese (ja)
Inventor
Takanori Endo
Seiro Hachiman
Masa Yonezawa
誠朗 八幡
政 米沢
貴則 遠藤
Original Assignee
Mitsubishi Materials Corp
三菱マテリアル株式会社
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Priority to JP2000137998A priority Critical patent/JP2001319380A/en
Publication of JP2001319380A publication Critical patent/JP2001319380A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To speedily inform a user of the contents of the information recorded on an optical disk without reproducing them. SOLUTION: This optical disk has a reflection film 12 formed on the surface in the vicinity of the center hole 11a of a disk substrate 11 and is constituted so that the information can be stored as a pit 12c between a read-in part 12a of the film 12 and a read-out part 12b. A RFID 13 constituted of a coil 14 formed by winding around the vicinity of the hole 11a by one or more times and a IC chip 16 connected to both ends of the coil 14 is arranged on the surface of the film 12 between the edge of the hole 11a and the part 12a. A radial notch 17, which is extended from the inner edge of the film 12 and crosses the coil 14 and the tip of which is separated from the outer edge of the coil 14 by 2.5 mm or longer, is formed on the film 12. An electrically conductive film 18, which shows 0.25 Ω or smaller electric resistance value when the width and length of the film 18 are 1 cm, is formed, directly or while interposing a protection film, on the film 12 between the circle 12d coming into contact with the tip of the notch 17 and the part 12b.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、半導体レーザを用いた高密度情報記録媒体である光ディスクに関する。 The present invention relates to relates to an optical disc is a high density information recording medium using a semiconductor laser. 更に詳しくはRFIDが付された光ディスクに関するものである。 And more particularly to an optical disk to which the RFID is attached.

【0002】 [0002]

【従来の技術】光ディスクは、予め記録された音声や映像を専ら再生させることを目的とする再生専用型光ディスク、及び企業の研究開発におけるデータやシステム開発におけるプログラムを記憶させる追記型光ディスク及び書換え可能型光ディスクに類別される。 [Description of the Related Art An optical disk is pre-recorded audio and read-only optical disc and an object exclusively be reproduced video, and corporate research and development programs is to write-once optical disk and rewritable storing the data and system development in the It is categorized into type optical disk. 企業において光ディスクに記録された研究開発におけるデータやプログラムはを貴重なものであるため、そのようなデータ又はプログラムが記録された光ディスクの保管場所からの出し入れは厳重に管理され、その使用に際しては光ディスクに貼付けられたラベルに印刷されたタイトル等を目視により確認して所望の光ディスクを選択している。 Since the data and programs in R & D that has been recorded on the optical disc is one of the valuable in the enterprise, such data or out from the storage location of the optical disk in which the program is recorded is strictly controlled, the optical disk when its use and selects a desired optical disc to check visually the sticking was labels printed title or the like.

【0003】 [0003]

【発明が解決しようとする課題】しかし、比較的多くの光ディスクが同一の場所に保管されている場合には、個々の光ディスクのラベルに印刷されたタイトル等も近似するものが比較的多くなり、所望の光ディスクをそのタイトル等だけでは直ちに選択できない不具合がある。 The object of the invention is to be Solved However, relatively large number of the case where the optical disc is stored in the same location, it is relatively large ones, such as title, which is printed on the label of the individual optical disk also approximate, only the title or the like of the desired optical disk there is a problem that can not be selected immediately. 即ち、近似するタイトルが複数の光ディスクに印刷されている場合には、それら複数の光ディスクを先ず選択して再生装置に挿入し、実際に記憶された情報を個別に読み出さなければ所望の光ディスクであるか否かを判断することができない問題点がある。 That is, when the title of approximating is printed in a plurality of optical discs, insert a plurality of optical disks is first to select and playback apparatus, it is desired of the optical disk to be actually read individually stored information there is a problem that can not be possible to determine whether or not.

【0004】この点を解消するためには、ラベルに光ディスクを識別しうるに十分な量の内容を予め記載することも考えられるが、ラベルの記載スペースには限界があり、光ディスクの記憶内容を書き換えた場合にはラベルを張り替えて新たに記載しなければならない煩わしさがある。 [0004] In order to solve this point, it is conceivable to described previously a sufficient amount of content can identify the optical disk labels, the described label space is limited, the storage contents of the optical disc when rewriting is troublesome that must be newly described replacement label. また、ラベルに何も記載しなくても光ディスクを特定できれば、視認による光ディスクの特定に起因する盗難を抑制することも可能になる。 Further, if the specific optical disk without anything on the label, it becomes possible to suppress the theft due to the particular optical disc according to viewing. 本発明の目的は、実際に再生させることなく光ディスクに記録された情報内容を速やかに知ることができるRFID付光ディスクを提供することにある。 An object of the present invention is to provide an RFID equipped optical disk can be known quickly actually information content recorded on the optical disc without play. 本発明の別の目的は、光ディスクのデータとRFIDのデータを用いた多様な潜在的用途を開発することができるRFID付光ディスクを提供することにある。 Another object of the present invention is to provide an RFID with optical disks that can be developed a variety of potential applications using an optical disk data and RFID data.

【0005】 [0005]

【課題を解決するための手段】請求項1に係る発明は、 Means for Solving the Problems The invention according to claim 1,
図1に示すように、中心孔11aを有するディスク基板11のその中心孔11a周囲の表面に反射膜12が形成され、反射膜12のリードイン部12aからリードアウト部12bの間に情報をピット12cとして記憶可能に構成された光ディスクの改良である。 As shown in FIG. 1, the reflective film 12 in the center hole 11a around the surface of the disk substrate 11 having a center hole 11a is formed, the pit information between the lead-out portion 12b from the lead-in portion 12a of the reflection film 12 a storage configured to be able to improvements of an optical disc as 12c. その特徴ある構成は、中心孔11aの周囲を1又は2回以上巻回して形成されたコイル14とコイル14の両端に接続されたIC IC its characteristic configuration is connected around the center hole 11a at both ends of the one or coil 14 is formed by turning two or more winding and the coil 14
チップ16とにより構成されたRFID13が中心孔1 RFID13 constituted by the chip 16 has a center hole 1
1aの孔縁とリードイン部12aとの間の反射膜12の表面に設けられ、反射膜12の内縁からコイル14を横断して先端がコイル14の外縁から2.5mm以上離れる半径方向の切欠き17が反射膜12に形成されたところにある。 Provided on the surface of the reflective film 12 between the hole edge and the lead-in portion 12a of the 1a, switching tip from the inner edge of the reflective film 12 across the coil 14 in the radial direction away than 2.5mm from the outer edge of the coil 14 outs 17 is in place, which is formed on the reflection film 12.

【0006】請求項1に記載された発明では、RFID [0006] In the invention described in claim 1, RFID
(Radio Frequency Identification)13を光ディスク10に直接設けることにより、RFIDとの情報交換により情報内容等を発する他の機器との関連においてその光ディスク10に関する情報内容を速やかに知ることができる。 By providing directly (Radio Frequency Identification) 13 of the optical disk 10, it is possible to know quickly the information contents related to the optical disk 10 in relation to other devices that emit information content such as the information exchange with the RFID. 光ディスクの反射膜12は相応の抵抗を持つ導電性を有する。 Reflective film of the optical disk 12 is electrically conductive having a resistance corresponding. この反射膜12にはコイル14に流れる電流の相互誘導により電圧が印加され電流が流れ、エネルギーの損失がある。 The reflection film current voltage is applied to flow due to mutual induction of current flowing through the coil 14 to 12, there is a loss of energy. このエネルギーの損失はRFID This loss of energy RFID
13のQ値の低下をもたらし、その共振の強さを弱める。 It resulted in a decrease in the Q value of 13, weakening the strength of the resonance. 一方、反射膜12に切欠き17を形成してその先端とコイル14の外縁との間隔を2.5mm以上とすることにより、コイル14のQ値に影響を与える反射膜12 On the other hand, by making the distance between the outer edge of the tip and the coil 14 and over 2.5mm to form a reflective film 12 notches to 17, the reflective film 12 which affects the Q value of the coil 14
における電流の発生を防止し、そのQ値が低下することを防止する。 The generation of current is prevented in, its Q value is prevented from being lowered.

【0007】請求項2に係る発明は、請求項1に係る発明であって、中心孔11aと同心であって切欠き17の先端に接する円12dリードアウト部12bとの間の反射膜12に導電膜18が直接又は保護膜を介して形成されたRFID付光ディスクである。 [0007] The invention according to claim 2 is the invention according to claim 1, the reflective film 12 between the circle 12d readout section 12b in contact with the front end of the center hole 11a and concentric with a with notches 17 the conductive film 18 is RFID equipped optical disc formed directly or through a protective film. 中心孔11aと同心であって反射膜12の切欠き17の先端に接する円12 Circle in contact with the tip of the notch 17 of the center hole 11a and the reflective film 12 a concentric 12
dからリードアウト部12bの間はRFID13に対して電気抵抗の小さい回路としての影響を及す。 Between d of the lead-out section 12b to 及 effects as small circuit electrical resistance to RFID13. 導電膜1 The conductive film 1
8には相互誘導により電流が流れるが、高周波の場合には導電膜18の抵抗が低くても導電膜18の自己インダクタンスの影響で流れる電流は増加しないので、抵抗が低ければ損失は少なくQ値は高くなる。 Current flows through mutual induction in 8, the current flowing through the influence of the self-inductance of the conductive film 18 even at low resistance of the conductive film 18 in the case of high frequency is not increased, if low resistance loss is small Q value It is higher. このため、この請求項2に記載されたRFID付光ディスクでは、導電膜18を設けることによりそのQ値を高くすることができる。 Therefore, in the RFID with optical disks described in claim 2, it is possible to increase the Q value by providing the conductive film 18.

【0008】請求項3に係る発明は、請求項2に係る発明であって、導電膜18の幅が1cmであって長さが1 [0008] The invention according to claim 3, an invention according to claim 2, the length a width of the conductive film 18 is 1 cm 1
cmであるとき導電膜18の電気抵抗値が0.25Ω以下であるRFID付光ディスクである。 Electrical resistance of the conductive film 18 when a cm is RFID equipped optical disk is less than 0.25 ohms. この請求項3に記載されたRFID付光ディスクでは、導電膜18の電気抵抗値が0.25Ω以下であるので、導電膜18による損失によるQ値の低下を少なくすることができる。 The RFID with optical disks described in claim 3, the electric resistance value of the conductive film 18 is not more than 0.25 ohms, it is possible to reduce the decrease in Q value due to the loss due to the conductive film 18. なお、この導電膜18に流れる電流の影響により自己インダクタンスは小さくなるが、導電膜18の影響下で所定のインダクタンスになるようにコイルの巻数を増やすことにより、その自己インダクタンスを調整することができる。 Although the self-inductance is smaller due to the influence of the current flowing in the conductive film 18, by increasing the number of turns of the coil so as to have a predetermined inductance under the influence of the conductive film 18, it is possible to adjust the self-inductance .

【0009】 [0009]

【発明の実施の形態】次に本発明のRFID付光ディスクを図面に基づいて詳しく説明する。 It will be described in detail with reference to the accompanying drawings RFID with optical discs DETAILED DESCRIPTION OF THE INVENTION The present invention will now. 図1及び図2に示すように、光ディスク10は、中心孔11aを有するディスク基板11と、この中心孔11a周囲のディスク基板11の表面に直接形成されたアルミニウム蒸着膜からなる反射膜12とを備える。 As shown in FIGS. 1 and 2, the optical disk 10 includes a disk substrate 11 having a center hole 11a, and a reflecting film 12 made of an aluminum deposition film is formed directly on the surface of the center hole 11a around the disc substrate 11 provided. この光ディスク10はいわゆるカード型のコンパクトディスクであり、企業の研究開発におけるデータやシステム開発におけるプログラムが記憶される。 The optical disc 10 is a compact disc so-called card-type programs in the data and system development in research and development companies are stored. この光ディスク10はデータ又はプログラムが記憶された後、企業の開発室に収納される。 The optical disk 10 after the data or program is stored, are accommodated in the developing chamber of the companies. データ又はプログラムからなる情報はディスク基板11上に設けられた反射膜12の中心孔11a近傍のリードイン部12aからディスク基板11の外周縁近傍のリードアウト部12bの間の凹凸からなる位相ピット12cに記録され、この情報はディスク基板11の裏面側から照射されるレーザ光の解析により再生されるように構成される。 Phase pit 12c consisting of unevenness between information composed of data or programs from the central hole 11a near the lead-in portion 12a of the reflection film 12 provided on the disk substrate 11 of the outer peripheral edge near the lead-out portion 12b of the disk substrate 11 recorded in that, the information is configured to be reproduced by the analysis of the laser beam irradiated from the back side of the disk substrate 11. なお、光ディスクはコンパクトディスクではなく、 It should be noted that the optical disc is not a compact disk,
DVD−RAM(DigitalVersatile Disc-Random Acces DVD-RAM (DigitalVersatile Disc-Random Acces
s Memory),DVD−R(DVD-Recordable),DVD− s Memory), DVD-R (DVD-Recordable), DVD-
RW(DVD-ReWritable)CD−R(Compact Disc-Recor RW (DVD-ReWritable) CD-R (Compact Disc-Recor
dable),CD−RW(Compact Disc-ReWritable)等の追記型又は書換え型の光ディスクなどでもよい。 dable), or the like may be used CD-RW (Compact Disc-ReWritable) write-once or rewritable optical disk such as.

【0010】中心孔11aの孔縁とリードイン部12a [0010] The hole edge of the center hole 11a and the lead-in portion 12a
との間の反射膜12の表面にはRFID(Radio Freque The surface of the reflective film 12 between the RFID (Radio Freque
ncy Identification)13が設けられる。 NCY for the Identification) 13 is provided. このRFID This RFID
13は、ディスク基板11の中心孔11aの周囲を1又は2回以上巻回して形成されたコイル14と、このコイル14の両端に接続されたICチップ16とにより構成される。 13 includes a coil 14 around the central hole 11a is formed by winding one or more or two disc substrates 11, and the IC chip 16 connected to both ends of the coil 14 by. この実施形態におけるコイル14とICチップ16は反射膜12の表面に設けられる。 Coil 14 and the IC chip 16 in this embodiment is provided on the surface of the reflective film 12. 具体的に、コイル14はアルミニウム箔や銅箔等の導電性材料をエッチング法又は打抜き法等により不要部分を除去して渦巻き状に形成され、コイル14の内縁と中心孔11aの孔縁との間隔が0.1mm以上であって、コイル14の外縁とリードイン部12aとの間隔が2.5mm以上に形成される。 Specifically, the coil 14 is a conductive material such as aluminum foil or copper foil by removing unnecessary portions by etching or punching process or the like is formed in a spiral shape, with the hole edge of the inner edge and the center hole 11a of the coil 14 interval is not more 0.1mm or more, the distance between the outer edge and the lead-in portion 12a of the coil 14 is formed over 2.5 mm. ICチップ16はコイル14の両端に接続された状態で図示しない絶縁膜を介挿させた状態で反射膜1 Reflection IC chip 16 in a state in which inserted an insulating film (not shown) in a state of being connected to both ends of the coil 14 membrane 1
2に搭載される。 2 is mounted on.

【0011】反射膜12には半径方向に切欠き17が形成される。 [0011] notches 17 in the radial direction is formed on the reflective film 12. 切欠き17は反射膜12の内縁からコイル1 Notch 17 coil from the inner edge of the reflective film 12 1
4を横断して形成され、コイル14の外縁から切欠き1 4 across the forming notches from the outer edge of the coil 14 1
7の先端までの間隔Aは2.5mm以上になるように形成される。 Distance A to the tip of the 7 are formed to be above 2.5 mm. この実施の形態における切欠き17はICチップ16が設けられた位置と反対側の反射膜12を中心孔11aから0.1mmの幅に切削することにより形成される。 Notch 17 in this embodiment is formed by cutting the reflection film 12 on the side opposite to the position where the IC chip 16 is provided from the center hole 11a in the width of 0.1 mm. 切欠き17は低電圧の渦電量が反射膜12に発生することを阻止するためのものであるので、その幅は極めて小さくて良く、レーザ光を用いて切削することにより反射膜12に例えば幅1μmの切欠き17を形成させた場合であっても十分である。 Since the notch 17 is used to prevent the eddy current of the low voltage is generated in the reflective film 12, the width may be very small, for example, a width of the reflective film 12 by cutting using a laser beam even when allowed to form a notch 17 of 1μm it is sufficient. なお、この切欠き17 In addition, this notch 17
は反射膜12であるアルミニウムを蒸着する際に同時に形成しても良く、1カ所でも2カ所以上の複数本形成しても良い。 May be formed simultaneously with the deposition of aluminum as the reflective film 12 may be a plurality of forming two or more locations in one location.

【0012】切欠き17の先端に接する中心孔11aと同心の円12dとリードアウト部12bの間の反射膜1 [0012] reflective layer between the center hole 11a concentric circle 12d and the lead-out portion 12b in contact with the tip of the notch 17 1
2の表面には導電膜18が形成される。 The second surface conductive film 18 is formed. この実施の形態における導電膜18は図示しない接着剤層により反射膜12に直接貼付けて何ら保護膜を設けていないが、導電膜18の上に図示しない保護膜を形成しても良い。 Is not any a protective film directly affixed Ke to the reflection film 12 by an adhesive layer conductive film 18 is not shown in this embodiment, it may be formed a protective film (not shown) on the conductive film 18. また、反射膜12上に図示しない保護膜を形成してこの保護膜上に導電膜を形成しても良い。 It is also possible to form a conductive film on the protective film to form a protective film (not shown) on the reflective film 12. 更に、導電膜18は接着剤層によらずに蒸着により貼付け、若しくは導電性のフレークを含む塗料を塗布しても良い。 Further, the conductive film 18 Paste by evaporation regardless of the adhesive layer, or a coating material containing a conductive flakes may be coated. 導電性のフレークを含む塗料を塗布する場合には導電膜に保護膜としての機能を兼ねさせることも可能になる。 It becomes possible to let also functions as a protective film to the conductive film in the case of applying a coating material containing a conductive flakes. 導電膜18がアルミ箔、銅箔又は銀膜等により形成される場合には、 When the conductive film 18 is formed of aluminum foil, copper foil or silver film or the like,
その厚さは5μm〜30μmの範囲にあることが好ましく、蒸着膜の場合の好ましい厚さは0.05μm〜0. Its thickness is preferably in the range of 5 m to 30 m, preferred thickness of the case of the deposited film 0.05Myuemu~0.
50μmの範囲である。 It is in the range of 50μm. 塗料の場合、その厚さは固有抵抗値により幅1cmで長さ1cmのときの電気抵抗値が0.25Ω以下になるように選定される。 For coating, the thickness of the electrical resistance value when the length 1cm wide 1cm by resistivity is chosen to be less than 0.25 ohms.

【0013】図3に示すように、ICチップ16は電源回路16aと無線周波数(RF)回路16bと変調回路16cと復調回路16dとCPU16eとこれに接続された光ディスク10固有の情報を記憶するメモリ16f [0013] As shown in FIG. 3, the memory IC chip 16 for storing the power circuit 16a and a radio frequency (RF) circuit 16b and a modulation circuit 16c and the demodulation circuit 16d and CPU16e the optical disk 10 specific information connected thereto 16f
を有する。 Having. 電源回路16aはコンデンサ(図示せず)を内蔵し、このコンデンサはコイル14とともに共振回路を形成する。 The power supply circuit 16a has a built-in capacitor (not shown), this capacitor forms a resonant circuit together with the coil 14. このコンデンサにはコイル14が特定の共振周波数の電波を受信したときにその電磁誘導で生じる電力が充電される。 The coil 14 is in capacitor power generated by the electromagnetic induction when receiving a radio wave of a specific resonance frequency is charged. 電源回路16aはこの電力を整流し安定化してCPU16eに供給し、ICチップ16を活性化する。 The power supply circuit 16a supplies the CPU16e stabilizes rectifies this power, activates the IC chip 16. メモリ16fはROM(read only memor Memory 16f is ROM (read only memor
y)、RAM(ramdom-access memory)及びEEPRO y), RAM (ramdom-access memory) and EEPRO
M(electrically erasable pogramable read only mem M (electrically erasable pogramable read only mem
ory)を含み、CPU16eの制御の下で後述する書込・読出手段30からの電波のデータ通信による読出しコマンドに応じて記憶されたデータの読出しを行うとともに、書込・読出手段30からの書込みコマンドに応じてデータの書込みが行われる。 Comprises ory), performs reading of the stored data in response to a read command by radio data communication from the writing and reading means 30 to be described later under the control of CPU16e, writing from the writing and reading means 30 data writing is performed in accordance with the command.

【0014】書込・読出手段30は、送受信アンテナ3 [0014] The writing and reading means 30 includes a transmitting and receiving antenna 3
1と、バッテリを内蔵する電源回路32と無線周波数(RF)回路33、と変調回路34と、復調回路35 1, the power supply circuit 32 and a radio frequency (RF) circuit 33 having a built-in battery, and the modulation circuit 34, the demodulation circuit 35
と、CPU36と、これに接続されたメモリ37、ディスプレイ38及び入力装置39を有する。 If has a CPU 36, a memory 37 connected thereto, the display 38 and input device 39. この書込・読出手段30は、送受信アンテナ31を介して光ディスク20のコイル14に特定周波数の電波を送信してICチップ16を活性化し、かつそのチップ16のメモリ16 The writing and reading means 30, the IC chip 16 is activated by sending a radio wave of a specific frequency to the coil 14 of the optical disc 20 via the receiving antenna 31, and the memory 16 of the chip 16
fに対してデータの読出し・書込みを行い送受信アンテナ31を介して受信するコイル14からの応答信号によりメモリ17fに記憶された光ディスク20に関する情報を非接触で読出すように構成され、その情報内容をディスプレイ38に表示するように構成される。 It is configured to read the information on the optical disc 20 stored in the memory 17f by the response signal from the coil 14 received through the reception antenna 31 performs reading and writing data without contact relative to f, the information content configured to to display on the display 38.

【0015】このように構成されたRFID付光ディスクでは、ICチップ16のメモリ16fにその光ディスク20固有の情報、例えば光ディスクに記録させたデータのタイトル、種別、内容、記憶時間、光記録開始の位置等を入力する。 [0015] In the thus constructed RFID with optical disk, the optical disk 20 specific information memory 16f of the IC chip 16, for example, the data recorded in the optical disk title, type, content, storage time, the position of the optical recording start to enter the like. この場合、書き換え可能な光ディスクでは電子記憶装置のタイトル等も入力することができる。 In this case, it is possible in the rewritable optical disk also enter title of the electronic storage device. 具体的な入力は、書込・読出手段30の入力装置3 Specific inputs, the input device 3 of the writing and reading means 30
9を介して行われ、その入力信号は送受信アンテナ31 Conducted through 9, the input signal transmitting and receiving antenna 31
からRFID13のコイル14に向けて特定周波数の電波に載せて送信される。 Towards the coil 14 of RFID13 from being transmitted on the radio waves of a specific frequency. この信号は2値化されたデジタル信号である。 This signal is binarized digital signal. 書込・読出手段30から発せられるデジタル信号は、図示しない信号発生器から発せられ変調回路34で変調を受ける。 Digital signals emitted from the write-read means 30 is modulated at emitted from a signal generator (not shown) the modulation circuit 34. 無線周波数(RF)回路33ではこの変調した信号を増幅して送受信アンテナ31から送信する。 The radio frequency (RF) circuit 33 for transmitting from the transmitting and receiving antenna 31 amplifies the modulated signal. この変調には例えばASK(振幅変調)、F This modulation e.g. ASK (amplitude modulation), F
SK(周波数変調)又はPSK(位相変調)が挙げられる。 SK (Frequency Modulation) or PSK (phase modulation) and the like.

【0016】送信された光ディスクに関する情報信号を含む電波はRFID13のコイル14に受信され、この受信により電源回路16aのコンデンサに電磁誘導で生じる電力が充電される。 The radio wave including an information signal relating to the transmitted optical disc is received in the coil 14 of RFID13, power generated by electromagnetic induction in the capacitor of the power supply circuit 16a by the reception is charged. このとき、光ディスクの反射膜12にはコイル14に流れる電流の相互誘導により電流が流れようとするが、反射膜12に形成された切欠き1 In this case, although the reflective film 12 of the optical disk when you current to flow due to mutual induction of current flowing through the coil 14, the notch formed in the reflective film 12 1
7により、その電流の発生は防止され、そのQ値の低下が抑制される。 By 7, the generation of the current is prevented, lowering of the Q value can be suppressed. また、反射膜12の表面に形成された導電膜18は反射膜12とともにコイル14及びコンデンサにより構成される共振回路に対して電気抵抗の小さい回路として影響を及ぼす。 The conductive film 18 formed on the surface of the reflective film 12 has an effect as a smaller circuit electrical resistance to the resonant circuit comprising the coil 14 and the capacitor with a reflective film 12. 導電膜18には相互誘導により電流が流れるけれども、高周波の場合には導電膜18 Although the conductive film 18 a current flows due to mutual induction, in the case of the high-frequency conductive film 18
の抵抗が低くても導電膜18の自己インダクタンスの影響で流れる電流は増加しないので、抵抗が低ければ損失は少なくQ値は高くなる。 Since the current flowing through the influence of the self-inductance of the resistor be low conductive film 18 does not increase, losses A low resistance is small Q value is high. このため、上記共振回路は導電膜18によりそのQ値が高められ、電源回路16aは電力を整流し安定化して、CPU16eに供給し、IC Therefore, the resonance circuit is the Q value is increased by the conductive film 18, the power supply circuit 16a is stabilized rectified power is supplied to CPU16e, IC
チップ16を活性化する。 The chip 16 is activated. 次いでICチップ16のRF Then the RF IC chip 16
回路16bでは復調に必要な信号のみを取込み、復調回路16dで元のデジタル信号の番組情報の信号を再現させてメモリ16fに記憶させる。 Only uptake signal necessary for demodulation in the circuit 16b, by reproducing the signal of the program information of the original digital signal is stored in the memory 16f by the demodulation circuit 16d. このようにして各光ディスク10のICチップ16のメモリ16fに情報が記憶され、このように情報が記憶された光ディスク10はそれに貼り付けられたラベルに簡単なタイトルを記載した後、この状態で開発室に他の比較的多くの光ディスクとともに同一の場所に保管される。 Thus the information in the memory 16f of the IC chip 16 of the optical disk 10 is stored, after this way the optical disk 10 in which information is stored is described a simple title label affixed to it, the development in this state It is stored in the same location along with other relatively large optical disc in the chamber.

【0017】通常の開発業務における光ディスク10の識別は、格納場所から近似するタイトルが印刷された複数の光ディスク10を選択して取出す。 The identification of the optical disk 10 in the normal development work is taken out by selecting a plurality of optical disks 10 which title is printed to approximate the location. 次のこれら複数の光ディスク10を送受信アンテナ31に順次対向させる。 Sequentially face the plurality of optical disk 10 follows the transmission and reception antenna 31. 即ち、書込・読出手段21は、送受信アンテナ31 That is, writing and reading means 21, the transmitting and receiving antennas 31
を介して光ディスク20のコイル14に特定周波数の電波を送信してICチップ16を活性化し、かつそのチップ16のメモリ16fに対してデータの読出し・書込みを行い送受信アンテナ31を介して受信するコイル14 Activating an IC chip 16 by transmitting a radio wave of a specific frequency to the coil 14 of the optical disk 20 via, and coils received via the transmission and reception antenna 31 performs reading and writing of data to the memory 16f of the chip 16 14
からの応答信号によりメモリ17fに記憶された光ディスク20に関する情報を非接触で読出してディスプレイ38に表示する。 Response signals from the displaying reading information on the optical disc 20 stored in the memory 17f in a non-contact Te on the display 38.

【0018】具体的に説明すると、光ディスク10を送受信アンテナ31に対向させると、書込・読出手段30 [0018] Specifically, when the face of the optical disk 10 to the receiving antenna 31, the writing and reading means 30
はその送受信アンテナ31を介して光ディスク10のコイル14に向けてその識別コード質問信号を特定周波数の電波により送信する。 Transmits a radio wave of a specific frequency identification code inquiry signal to the coil 14 of the optical disk 10 via the transmitting and receiving antenna 31. この実施の形態における質問信号は2値化されたデジタル信号である。 Interrogation signal in this embodiment is a binarized digital signal. 書込・読出手段30から発せられるデジタル信号は、図示しない信号発生器から発せられ変調回路34で変調を受ける。 Digital signals emitted from the write-read means 30 is modulated at emitted from a signal generator (not shown) the modulation circuit 34. RF回路33ではこの変調した信号を増幅して送受信アンテナ31から送信する。 The RF circuit 33 transmits the transmitting and receiving antenna 31 amplifies the modulated signal. この変調には例えばASK(振幅変調)、FSK(周波数変調)又はPSK(位相変調)が挙げられる。 This modulation e.g. ASK (amplitude modulation), FSK (Frequency Modulation) or PSK (phase modulation) and the like.

【0019】送信された質問信号の電波は光ディスク1 [0019] The radio wave of the transmitted interrogation signal the optical disc 1
0のコイル14に受信され、この受信により、電源回路16aのコンデンサにはその電磁誘導で生じる電力が充電される。 Is received 0 of the coil 14, this reception, the capacitor of the power supply circuit 16a is force generated by the electromagnetic induction is charged. このとき、光ディスクの反射膜12にはコイル14に流れる電流の相互誘導により電流が流れようとするが、反射膜12に形成された切欠き17により、その電流の発生は防止され、そのQ値の低下が抑制される。 In this case, although the reflective film 12 of the optical disk when you current to flow due to mutual induction of current flowing through the coil 14, the notches 17 formed in the reflective film 12, generation of the current is prevented, the Q value reduction in can be suppressed. また、保護膜12の表面に形成された導電膜18 Further, formed on the surface of the protective film 12 a conductive film 18
は、電源回路16aの図示しないコンデンサとコイル1 , The capacitor and the coil 1 (not shown) of the power supply circuit 16a
4からなる共振回路に対して反射膜22とともに電気抵抗の小さい回路としての影響を及す。 With the reflective film 22 with respect to the resonance circuit consisting of 4 to 及 effects as small circuit electrical resistance. 導電膜18には相互誘導により電流が流れるが、高周波の場合には導電膜18の抵抗が低くても導電膜18の自己インダクタンスの影響で流れる電流は増加しないので、抵抗が低ければ損失は少なくQ値は高くなる。 Although the conductive film 18 a current flows due to mutual induction, the current flowing through the influence of the self-inductance of the conductive film 18 even at low resistance of the conductive film 18 in the case of high frequency is not increased, the loss A low resistance is less Q value is high. このため、共振回路は導電膜18によりそのQ値が高められ、電源回路16aは電力を整流し安定化して、CPU16eに供給し、IC Therefore, the resonant circuit that Q value is increased by the conductive film 18, the power supply circuit 16a is stabilized rectified power is supplied to CPU16e, IC
チップ16を活性化する。 The chip 16 is activated. 次いでICチップ16のRF Then the RF IC chip 16
回路16bでは復調に必要な信号のみを取込み、復調回路16dで元のデジタル信号の質問信号を再現させてメモリ16fから光ディスク10に関するデータを送信する。 Only uptake signal necessary for demodulation in the circuit 16b, by reproducing the interrogation signal of the original digital signal by the demodulation circuit 16d to transmit the data to an optical disk 10 from the memory 16f. このデータの送信は2値化された識別コードをIC Transmission of this data IC binarized identification code
チップ16の変調回路16cで変調し、RF回路16b Modulated by the modulation circuit 16c of the chip 16, RF circuit 16b
で増幅してコイル14から送出することにより行われる。 In is amplified it is carried out by sending from the coil 14.

【0020】送信されたデータは送受信アンテナ31が受信し、この書込・読出手段30のRF回路33で復調に必要な信号のみを取込み、復調回路35で元のデジタル信号を再現させてディスプレイ38に表示させる。 [0020] The transmitted data is received transmitting and receiving antenna 31, only the signal necessary for demodulation by the RF circuit 33 of the write-read means 30 incorporation, to reproduce the original digital signal by the demodulation circuit 35 display 38 to be displayed on. ディスプレイ38に表示された内容により、光ディスク1 The contents displayed on the display 38, the optical disk 1
0を再生装置に挿入して読み出すことなく、その光ディスク10に関する情報内容を知ることができるので、所望の光ディスク10を速やかに探し出すことができる。 0 without reading inserted into playback device can know the information contents related to the optical disk 10, it is possible to find quickly the desired optical disk 10.
また、このようにディスプレイ38に表示される内容により光ディスク10が特定される結果、光ディスク10 As a result of the optical disk 10 is identified by the contents displayed in this manner on the display 38, optical disk 10
のラベルにあえて何も記載しなければ、視認による光ディスク10の特定が不可能になる。 If dared the label described many, impossible particular optical disc 10 by visually recognized. このように、光ディスクが特定されることに起因する盗難を抑制すること等、本発明では光ディスクのデータとRFIDのデータを用いた多様な潜在的用途を開発することができる。 Thus, it like to suppress the theft caused by the optical disk is identified, in the present invention can be developed a variety of potential applications using data and RFID data of the optical disc.

【0021】 [0021]

【実施例】次に本発明の実施例を比較例とともに詳しく説明する。 EXAMPLE will be described in detail together with comparative examples embodiments of the present invention. <実施例1>図1に示すコイル14とICチップ16からなるRFID13を形成した。 To form a RFID13 including coil 14 and the IC chip 16 shown in <Embodiment 1> FIG. 即ち、直径0.5mm In other words, diameter 0.5mm
の被覆導線を一平面上で渦巻き状に5回巻いてコイル1 Coil 1 wound five times spirally to the insulated conductive wires in one plane
4を作製した。 4 was prepared. このコイル14の内径は30.5mmであり、外径は35.5mmとした。 The inner diameter of the coil 14 is 30.5 mm, outer diameter was 35.5 mm. このコイル14の両端にICチップ16を接続して共振周波数が13.5M Resonant frequency by connecting the IC chip 16 at both ends of the coil 14 13.5M
HzとなるRFID13を得た。 It was obtained become Hz RFID13. 一方、直径が8mmの中心孔11aを有するポリカーボネートからなる76m Meanwhile, 76m in diameter made of polycarbonate having a center hole 11a of 8mm
m×51mmのディスク基板11と、この中心孔11a A disc substrate 11 of m × 51 mm, the center hole 11a
周囲のディスク基板11表面に反射膜12が形成されたいわゆるカード型のコンパクトディスクを用意した。 It was prepared compact disc so-called card-type reflective film 12 on the periphery of the disk substrate 11 was formed on the surface. このコンパクトディスクの反射膜12に、その内縁から幅が0.1mmの切欠き17を半径方向に16mm形成した。 This reflective film 12 of the compact disc, the width from the inner edge to 16mm form a notch 17 of 0.1mm in the radial direction. このコンパクトディスクのこのように切欠き17が形成された反射膜12上に上記のRFID13を設けた。 The thus cut-out 17 of the compact disk is the above RFID13 provided on the reflective film 12 formed. この場合の切欠き17のコイル14を横断した先端からそのコイル14の外縁間での距離は4.25mmであった。 The distance of the coil 14 of the notch 17 between the outer edge of the coil 14 from the transverse and tip of the case was 4.25 mm. このRFID付光ディスクを実施例1とした。 The RFID with optical disc was as in Example 1.

【0022】<実施例2>コイル14の外径が38mm The outer diameter of the <Example 2> coil 14 is 38mm
であることを除いて実施例1と同一のRFID13を得た。 To yield Example 1 the same as RFID13 except that it. そして、切欠き17を実施例1と同一に形成した実施例1と同一の光ディスクの反射膜12上にこのRFI Then, the RFI on the reflective film 12 on the same optical disk as in Example 1, a notch 17 is formed in the same manner as in Example 1
D13を設けた。 The D13 is provided. この場合の切欠き17のコイル14を横断した先端からそのコイル14の外縁間での距離は3 The distance of the coil 14 of the notch 17 between the outer edge of the coil 14 from the transverse and tip of the case 3
mmであった。 It was mm. 更に、反射膜12の切欠き17の先端に接する中心孔11aと同心の円12dとリードアウト部12bの間にアルミからなる導電膜18を直接形成した。 Furthermore, to form a conductive film 18 made of aluminum between the notches 17 of the center hole 11a in contact with the tip circle concentric 12d and the lead-out portion 12b of the reflecting film 12 directly. このときの導電膜18の幅が1cmであって長さが1cmであるときの電気抵抗値は0.1Ωであった。 Electric resistance value when the width of the conductive film 18 at this time is 1cm long a 1cm was 0.1 [Omega. このRFID付光ディスクを実施例2とした。 The RFID with optical disks as Example 2.

【0023】<実施例3>直径0.4mmの被覆導線を一平面上で渦巻き状に10回巻いてコイル14を作製した。 [0023] was prepared coil 14 wound 10 times in a spiral shape in one plane of the coated conductive wire <Example 3> diameter 0.4 mm. このコイル14の内径は9mmであり、外径は1 The inner diameter of the coil 14 is 9 mm, an outer diameter 1
7.5mmとした。 It was 7.5mm. このコイル14の両端にICチップ16を接続して共振周波数が13.5MHzとなるRF RF resonant frequency is 13.5MHz and connect the IC chip 16 at both ends of the coil 14
ID13を得た。 ID13 was obtained. そして、切欠き17を実施例1と同一に形成した実施例1と同一の光ディスクの反射膜12上にこのRFID13を設けた。 Then, the RFID13 provided on the reflective film 12 on the same optical disk as in Example 1, a notch 17 is formed in the same manner as in Example 1. この場合の切欠き17のコイル14を横断した先端からそのコイル14の外縁間での距離は13.3mmであった。 The distance of the coil 14 of the notch 17 between the outer edge of the coil 14 from the transverse and tip of the case was 13.3 mm. このRFID付光ディスクを実施例3とした。 The RFID with optical disc was as in Example 3.

【0024】<実施例4>コイル14の外径が18.5 The outer diameter of the <Example 4> coil 14 is 18.5
mmであることを除いて実施例3と同一のRFID13 Carried out except that the mm Example 3 same as RFID13
を得た。 It was obtained. そして、切欠き17を実施例1と同一に形成した実施例1と同一の光ディスクの反射膜12上にこのR Then, the R in the reflection film 12 on the same optical disk as in Example 1, a notch 17 is formed in the same manner as in Example 1
FID13を設けた。 The FID13 provided. この場合の切欠き17のコイル1 Coil 1 of the notch 17 in this case
4を横断した先端からそのコイル14の外縁間での距離は12.6mmであった。 The distance between 4 transverse to tip the outer edge of the coil 14 was 12.6 mm. 更に、反射膜12の切欠き1 Further, notches of the reflective film 12 1
7の先端に接する中心孔11aと同心の円12dとリードアウト部12bの間に実施例2と同一の導電膜18を直接形成した。 Example 2 of the same conductive film 18 is directly formed between the center hole 11a concentric circle 12d and the lead-out portion 12b in contact with 7 the tip of the. このRFID付光ディスクを実施例4とした。 The RFID with optical disks as Example 4.

【0025】<比較例1>実施例1と同一のRFIDをポリカーボネートからなる板の上に設けたこの模擬光ディスクを比較例1とした。 [0025] was <Comparative Example 1> Example 1 comprising the same RFID from polycarbonate and Comparative Example 1 The simulated optical disc provided on the plate. <比較例2>切欠きを形成することなくRFIDを反射膜の上に設けたことを除いて実施例1と同一のRFID <Comparative Example 2> Example except that provided on the reflective film to RFID without forming a notch 1 and the same RFID
付光ディスクを比較例2とした。 The biasing optical disks as Comparative Example 2. <比較例3>実施例3と同一のRFIDをポリカーボネートからなる板の上に設けたこの模擬光ディスクを比較例3とした。 It was <Comparative Example 3> Example 3 and Comparative Example 3 The simulated optical disc provided on a plate made of the same RFID polycarbonate.

【0026】<比較例4>切欠きを形成することなくR [0026] without forming-out <Comparative Example 4> notch R
FIDを反射膜の上に設けたことを除いて実施例3と同一のRFID付光ディスクを比較例4とした。 And Comparative Example 4 The same RFID with optical disk as in Example 3 except in that a FID on the reflective film. なお、実施例1〜4及び比較例1〜4のコイルの外径、そのコイルの外縁と切欠き先端までの距離、反射膜の種類及び導電膜の有無、並びに導電膜を有する場合のその厚さと幅1cmで長さ1cmのときの電気抵抗値の関係を表1に示す。 Incidentally, the thickness of the case having an outer diameter of the coil of Examples 1-4 and Comparative Examples 1-4, the distance to the outer edge and the notch tip of the coil, the presence or absence of the type and the conductive film of the reflective film, and a conductive film Table 1 shows the relationship between the electric resistance value when the length 1cm in the to width 1cm.

【0027】<比較試験1及び評価>実施例1〜4及び比較例1〜4の光ディスクのRFIDにおけるコイルの自己インダクタンスLとQ値をそれぞれ測定した後、書込・読出手段30の送受信アンテナ31にそれぞれのR [0027] After the <Comparative Test 1 and Evaluation> coils in the RFID of the optical disk of Examples 1 to 4 and Comparative Examples 1 to 4 the self-inductance L and Q value were measured respectively, transmitting and receiving antenna 31 of the writing and reading means 30 each of R to
FID付光ディスクを近づけて、作動する距離を測定した。 Close the FID with optical disc was measured distance to operate. この結果を表1に示す。 The results are shown in Table 1.

【0028】 [0028]

【表1】 [Table 1]

【0029】比較例1及び比較例3の結果から、実施例に使用したRFIDは正常に作動するものであることが判る。 [0029] From the results of Comparative Example 1 and Comparative Example 3, it can be seen that RFID used in the examples are intended to operate normally. しかしこのように正常に作動するRFIDであっても、比較例2及び比較例4の結果から、光ディスクの反射膜に切欠きを形成することなく直接設けた後には作動しなくなることが判る。 But even RFID to operate normally in this manner, from the results of Comparative Examples 2 and 4, it can be seen that longer operation after providing directly without forming a notch in the reflective film of the optical disk. これは、反射膜12のコイル14に流れる電流による相互誘導により電圧が印加されて電流が流れ、エネルギーの損失が発生してRFID1 This reflective film current flows voltage is applied by mutual induction by current flowing through the coil 14 of the 12, energy loss occurs RFID1
3のQ値の低下をもたらしたことに起因するものと考えられる。 It is attributed to that result in decreased 3 of Q values.

【0030】一方、実施例1及び実施例3の結果から明らかなように、そのまま設けただけでは作動しないRF On the other hand, as is clear from the results of Examples 1 and 3, RF that does not operate only as provided
ID13であっても反射膜12に切欠き17を形成することにより正常に動作するようになることが判る。 Even ID13 seen that comes to operate normally by forming a notch 17 in the reflective film 12. これは、反射膜12に形成された切欠き17により、コイル14のQ値に影響を与える反射膜12における電流の発生が防止されてQ値の低下が抑制された結果と考えられる。 This is because the reflective film 12 notch 17 formed in the reduction of the Q value is prevented generation of current in the reflective film 12 which affects the Q value of the coil 14 is considered to result was suppressed. 更に、実施例2及び実施例4の結果から明らかなように、反射膜12上に導電膜18を形成すればその作動距離を伸ばすことができることが判る。 Furthermore, as is clear from the results of Examples 2 and 4, the working distance it can be seen that it is possible to extend the by forming the conductive film 18 on the reflective film 12. これは導電膜1 This conductive film 1
8によりコイル14のQ値の低下が更に抑制されたことに起因するものと考えられる。 Decrease in the Q value of the coil 14 by 8 is considered to be due to being further suppressed.

【0031】 [0031]

【発明の効果】以上述べたように、本発明によれば、中心孔の周囲を1又は2回以上巻回して形成されたコイルとこのコイルの両端に接続されたICチップとにより構成されたRFIDを、中心孔の孔縁とリードイン部との間の反射膜の表面に設けたので、RFIDとの情報交換により情報等を発する他の機器との関連においてその光ディスクに関する情報内容を速やかに知ることができる。 As described above, according to the present invention, according to the present invention, which is constituted by an IC chip connected around the one or more times wound coil formed by turning on both ends of the coil of the center hole the RFID, since there is provided on the surface of the reflective film between the hole edge and the lead-in portion of the central hole, the information contents related to the optical disk quickly in relation to the other devices that emit information or the like by exchanging information with RFID it is possible to know. この場合、反射膜の内縁からコイルを横断して先端がコイルの外縁から2.5mm以上離れる半径方向の切欠きを反射膜に形成したので、コイルに流れる電流による相互誘導により反射膜に電流が流れることを防止し、 In this case, the tip across the coil from the inner edge of the reflective film to form a notch in the radial direction away than 2.5mm from the outer edge of the coil to the reflective film, the current reflection film by mutual induction by current flowing through the coil to prevent the flow,
このエネルギーの損失に起因するRFIDのQ値の低下を抑制することができる。 Due to the loss of this energy it is possible to suppress a decrease of the RFID in the Q value.

【0032】また、中心孔と同心であって切欠きの先端に接する円とリードアウト部の間の反射膜に導電膜を直接又は保護膜を介して形成すれば、導電膜には相互誘導により電流が流れるが、高周波の場合には導電膜の抵抗が低くても導電膜の自己インダクタンスの影響で流れる電流は増加しないので、抵抗が低ければ損失は少なくQ Further, by forming directly or through a protective film a conductive film reflective film between the circle and the lead-out portion in contact with a central hole concentric to the notch tip, by mutual induction to the conductive film current flows, but since the case of the high frequency does not increase the current flowing through the influence of self-inductance also conductive film resistance is low in the conductive film, a low resistance loss is small Q
値は高くなる。 The value is higher. このため、導電膜を設けることによりそのQ値を更に高くして、実際に再生させることなく光ディスクに記録された情報内容を確実に得ることができる。 Therefore, the Q value is further increased by providing a conductive film, actually information content recorded on the optical disc without being reproduced can be reliably obtained. なお、導電膜の幅が1cmであって長さが1cmであるとき導電膜の電気抵抗値が0.25Ω以下であれば、導電膜による損失によるQ値を有効に高めてRFI As long 0.25Ω or less electrical resistance value of the conductive film when the width of the conductive film is 1cm long a 1cm, and effectively increase the Q value due to the loss by the conductive film RFI
Dを確実に作動させることができる。 It is possible to reliably operate the D.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明のRFID付光ディスクを示す図2のB [1] of FIG. 2 illustrating the RFID with optical discs of the present invention B
−B線断面図。 -B line cross-sectional view.

【図2】その光ディスクの平面図。 Figure 2 is a plan view of the optical disk.

【図3】そのRFIDと書込・読出装置の構成を示す概念図。 Figure 3 is a conceptual diagram showing the configuration of the RFID and writing and reading apparatus.

【符号の説明】 DESCRIPTION OF SYMBOLS

10 光ディスク 11 ディスク基板 11a 中心孔 12 反射膜 12a リードイン部 12b リードアウト部 12c ピット 12d 切欠きの先端に接する中心孔と同心の円 13 RFID 14 コイル 16 ICチップ 17 切欠き 18 導電膜 10 optical disc 11 disc substrate 11a center hole 12 reflective film 12a lead-in portion 12b the center hole concentric circles 13 RFID 14 coil 16 IC chip 17 notch 18 a conductive film in contact with the lead-out portion 12c pit 12d notch tip

───────────────────────────────────────────────────── フロントページの続き (72)発明者 八幡 誠朗 東京都千代田区大手町1丁目6番1号 知 財サービス株式会社内 Fターム(参考) 5D029 LB03 LC11 MA14 MA18 PA01 VA07 ────────────────────────────────────────────────── ─── front page of the continuation (72) inventor Yawata MakotoAkira Otemachi, Chiyoda-ku, tokyo 1-chome sixth No. 1 intellectual property service Co., Ltd. in the F-term (reference) 5D029 LB03 LC11 MA14 MA18 PA01 VA07

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 中心孔(11a)を有するディスク基板(11) 1. A disk having a center hole (11a) substrate (11)
    の前記中心孔(11a)周囲の表面に反射膜(12)が形成され、前記反射膜(12)のリードイン部(12a)からリードアウト部(12b)の間に情報をピット(12c)として記憶可能に構成された光ディスク(10)において、 前記中心孔(11a)の周囲を1又は2回以上巻回して形成されたコイル(14)と前記コイル(14)の両端に接続されたICチップ(16)とにより構成されたRFID(13)が前記中心孔(11a)の孔縁と前記リードイン部(12a)との間の前記反射膜(12)の表面に設けられ、 前記反射膜(12)の内縁から前記コイル(14)を横断して先端が前記コイル(14)の外縁から2.5mm以上離れる半径方向の切欠き(17)が前記反射膜(12)に形成されたことを特徴とするRFID付光ディスク。 Said center hole (11a) reflecting the perimeter of the surface film (12) is formed of a lead-out portion from the lead-in portion (12a) of said reflecting film (12) information between (12b) as a pit (12c) in memory configured to be capable optical disk (10), said center hole IC chip connected to both ends of the surrounding one or more times winding Rotate formed coils (14) and said coil (14) of (11a) RFID constituted by the (16) (13) is provided on the surface of the reflective film (12) between the hole edge and the lead-in portion of the center hole (11a) (12a), said reflective film ( the tip across said coil (14) from the inner edge 12) to the coil (-out outer radial notch away than 2.5mm from the 14) (17) is formed on said reflective film (12) RFID with optical disc characterized.
  2. 【請求項2】 中心孔(11a)と同心であって切欠き(17) 2. A notch A central hole and (11a) concentric (17)
    の先端に接する円(12d)とリードアウト部(12b)の間の反射膜(12)に導電膜(18)が直接又は保護膜を介して形成された請求項1記載のRFID付光ディスク。 Reflective film (12) to the conductive film (18) is RFID equipped optical disk according to claim 1, wherein the formed directly or via a protective film between the circle tangent to the tip (12d) and the lead-out portion (12b) of.
  3. 【請求項3】 導電膜(18)の幅が1cmであって長さが1cmであるとき前記導電膜(18)の電気抵抗値が0.2 Wherein the electrical resistance of the conductive film when the width of (18) is 1cm long a 1cm the conductive layer (18) is 0.2
    5Ω以下である請求項2記載のRFID付光ディスク。 RFID with optical disk according to claim 2, wherein 5Ω or less.
JP2000137998A 2000-05-11 2000-05-11 Optical disk with rfid Pending JP2001319380A (en)

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