JPH044665B2 - - Google Patents

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Publication number
JPH044665B2
JPH044665B2 JP59084599A JP8459984A JPH044665B2 JP H044665 B2 JPH044665 B2 JP H044665B2 JP 59084599 A JP59084599 A JP 59084599A JP 8459984 A JP8459984 A JP 8459984A JP H044665 B2 JPH044665 B2 JP H044665B2
Authority
JP
Japan
Prior art keywords
adhesive layer
optical memory
transparent
memory element
spacer member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP59084599A
Other languages
English (en)
Other versions
JPS60226046A (ja
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP59084599A priority Critical patent/JPS60226046A/ja
Publication of JPS60226046A publication Critical patent/JPS60226046A/ja
Priority to US07/061,034 priority patent/US4740947A/en
Publication of JPH044665B2 publication Critical patent/JPH044665B2/ja
Granted legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1406—Ultraviolet [UV] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
    • B29C65/487—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical
    • B29C65/4875—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical being spherical, e.g. particles or powders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/782—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined
    • B29C65/7823—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined by using distance pieces, i.e. by using spacers positioned between the parts to be joined and forming a part of the joint
    • B29C65/7826—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined by using distance pieces, i.e. by using spacers positioned between the parts to be joined and forming a part of the joint said distance pieces being non-integral with the parts to be joined, e.g. particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B29C66/452—Joining of substantially the whole surface of the articles the article having a disc form, e.g. making CDs or DVDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
    • B29C65/4885—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their composition being non-plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

【発明の詳細な説明】 ＜発明の技術分野＞ 本発明は光学的に情報の記録・再生・消去等を
行なう光メモリ素子に関するものである。
＜発明の技術的背景とその問題点＞ 近年、光メモリ素子は高密度大容量メモリとし
て注目されており、中でも特に光メモリ円板は磁
気テープ等に比べて情報のアクセスが速いため、
特に研究開発が活発に行なわれている。
従来より提案されている情報の消去も可能な光
磁気メモリ円板の構造の断面一部拡大図を第５図
に示す。
第５図において、１及び５はそれぞれPMMA
等の樹脂基板あるいはガラス基板等から成る透明
円板であり、２及び４はそれぞれ単層磁性膜また
は誘電体膜、磁性膜、反射膜等より成る多層膜の
記録層であり、３は紫外線硬化剤等の接着剤層で
ある。
このような構成にあつては２枚重ねの円板にす
ることにより、円板の両面に情報を入れることが
出来るため、円板当りの情報量が２倍になるメリ
ツトがあると共に、透明円板１及び５として
PMMA等の樹脂基板を用いた場合には基板のそ
り等の形状変化を抑えることが出来るという利点
もある。
しかし、一方円板の回転による振れまわりを低
減するために、円板の厚み公差及び接着層３の厚
みむら等を厳しく管理して円板状の光メモリ素子
を製作する必要がある。
＜発明の目的＞ 本発明は上記諸点に鑑みて成されたものであ
り、２枚重ねの光メモリ素子において接着層の厚
みむらを無くした構造の光メモリ素子を提供する
ことを目的とし、この目的を達成するため、本発
明の光メモリ素子は周辺部を除く表面上に記録層
の形成された第１及び第２の透明基板と、該第１
及び第２の透明基板を前記記録層を挟んで貼り合
わせる紫外線硬化型の接着層とを備え、該紫外線
硬化型の接着層には1.4〜1.6程度の屈折率を有す
る透明なスペーサ部材が散在して構成されてい
る。
＜発明の実施例＞ 以下、本発明を図面を参照して詳細に説明す
る。
第１図は本発明の光メモリ素子の一実施例の構
造を示す一部拡大断面図である。
第１図において１及び５はそれぞれPMMA等
の樹脂基板あるいはガラス基板等から成る透明円
板、２及び４はそれぞれ上記の透明円板１及び５
の対向する面上に形成された単層磁性膜または誘
電体膜、反射膜等より成る多層膜の記録層、３は
紫外線硬化型の接着剤層であり、この接着剤層３
中に本発明の特徴である球状のスペーサ部材６が
散在されている。
上記スペーサ部材６を屈折率が1.4〜1.6程度の
透明体で構成することにより、紫外線硬化型の接
着剤の屈折率とほぼ同じ値を示すことになり、こ
の結果、この球状のスペーサ部材６の存在を光学
的には検出できなくなり、見かけ上、第５図に示
した従来の接着層のみのものと同じになり、かつ
接着層の厚みの最小値は、この球状のスペーサ部
材６の直径精度によつて正確に設定されることに
なる。
なお、スペーサ部材６の材質としてはガラスあ
るいはPMMA等の樹脂部材等が良く、また大き
さは50〜100μｍの直径であることが望ましい。
上記第１図に示した光メモリ素子を作る場合、
次の順序で行なわれる。
紫外線硬化型の未硬化の接着剤に上記の球状
スペーサ部材を体積比100：10：１（接着剤：ス
ペーサ）で混入させて、よく撹拌する。
上記のスペーサの入つた接着剤中に含まれる
気泡を例えば真空引き等によつて抜く。
接着剤を円板上に塗布する。
円板を重ねて位置合わせを行ない、第２図に
示すように上下面から圧力を加える。このとき
圧力を加えるための押圧板７は円板直径よりも
小さい直径を有する円形をしているものが望ま
しい。
接着層の厚みがスペーサ部材で決定されるに
充分な圧力を加えた後、紫外線９を円板全面に
照射する。なお、このとき円板は第３図に示す
ように外周部に記録膜が無く光が通過する構造
をしているものとし、このような構造により、
スペーサの混入された接着層３′のうち光の照
射される１０の部分が硬化して、円板が滑らな
くなる。
以上のようにして第１図に示した構造の光メモ
リ素子が作られるが、本発明の光メモリ素子の製
造方法はこれに限定されるものではない。
なお、接着剤として嫌気硬化性のものを使用す
ることにより、時間経過と共に未硬化部分が硬化
するために更に好都合である。
本発明は上記実施例に限定されるものではな
く、種々の変形が可能である。
例えばスペーサ部材６は球状である必要がな
く、第４図に示すように円柱状のスペーサ部材
６′を用いることも可能である。このような円柱
状のスペーサ部材６′をガラスで構成した場合に
は第４図における矢印ａの方向から力を加えても
形状が容易に変化しないのに対し、矢印ｂのよう
に斜めから力を加えた場合には円柱６′が折れて
より短い円柱となり、従つて適当な圧力を加える
ことで最終的には円柱の直径にまで間隔が縮まる
ことになる。
またPMMA等の樹脂材料をスペーサ部材６′と
して用いる場合には円柱の高さを長くすることに
より、円柱が全て第４図に示すように倒れた形と
なり、最少間隔が容易に決定されることになる。
また第２図における押え板７は必ずしも円形で
ある必要はなく、要は円板外周部あるいは内周部
に設けられた記録膜のない透明部分の一部に光が
照射され得る形状であれば良い。
＜発明の効果＞ 以上説明したように、本発明によれば、周辺部
を除く表面上に記録層の形成された２枚の透明基
板を、記録層を挟んで、屈折率が1.4〜1.6程度の
透明なスペーサ部材を散在させた紫外線硬化型の
接着層によつて貼り合わせるので、記録層の形成
された透明基板間の接着層の厚みを容易に、か
つ、精度良く均一にすることが可能となる。しか
も、接着層に散在する透明なスペーサ部材の屈折
率が1.4〜1.6程度であるので、接着層中に散在す
るスペーサ部材の存在が光学的に検出されること
がなく、従来のスペーサ部材のない接着層のみの
光メモリ素子と全く同様に取り扱うことが可能と
なる。
【図面の簡単な説明】
第１図は本発明の光メモリ素子の一実施例の構
造を示す断面一部拡大図、第２図は本発明の光メ
モリ素子の製造方法の一例を示す概略図、第３図
は第２図の製造方法によつて接着をした場合に硬
化する部分を示す一部拡大断面図、第４図はスペ
ーサ部材の他の一例を示す図、第５図は従来の光
メモリ素子の構造を示す断面一部拡大図である。 １……第１の透明基板、２……記録層、３……
接着層、３′……スペーサ部材を含んだ接着層、
４……記録層、５……第２の透明基板、６……ス
ペーサ部材、１０……硬化部分。

Claims (1)

  1. 【特許請求の範囲】 １ 周辺部を除く表面上に記録層の形成された第
    １及び第２の透明基板と、 該第１及び第２の透明基板を前記記録層を挟ん
    で貼り合わせる紫外線硬化型の接着層とを備え、 該紫外線硬化型の接着層には1.4〜1.6程度の屈
    折率を有する透明なスペーサ部材が散在してなる
    ことを特徴とする光メモリ素子。
JP59084599A 1984-04-25 1984-04-25 光メモリ素子 Granted JPS60226046A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP59084599A JPS60226046A (ja) 1984-04-25 1984-04-25 光メモリ素子
US07/061,034 US4740947A (en) 1984-04-25 1987-06-12 Dual surface optical memory disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59084599A JPS60226046A (ja) 1984-04-25 1984-04-25 光メモリ素子

Publications (2)

Publication Number Publication Date
JPS60226046A JPS60226046A (ja) 1985-11-11
JPH044665B2 true JPH044665B2 (ja) 1992-01-29

Family

ID=13835145

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59084599A Granted JPS60226046A (ja) 1984-04-25 1984-04-25 光メモリ素子

Country Status (1)

Country Link
JP (1) JPS60226046A (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2702497B2 (ja) * 1988-04-09 1998-01-21 日立マクセル株式会社 光情報記録媒体
DE102018128863A1 (de) * 2018-11-16 2020-05-20 HELLA GmbH & Co. KGaA Verfahren zum Verkleben von zwei lagegenau zueinander angeordneten Bauteilen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186150A (ja) * 1983-04-06 1984-10-22 Hoya Corp 光学式情報記録媒体

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59186150A (ja) * 1983-04-06 1984-10-22 Hoya Corp 光学式情報記録媒体

Also Published As

Publication number Publication date
JPS60226046A (ja) 1985-11-11

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