JPS605436A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPS605436A JPS605436A JP58110123A JP11012383A JPS605436A JP S605436 A JPS605436 A JP S605436A JP 58110123 A JP58110123 A JP 58110123A JP 11012383 A JP11012383 A JP 11012383A JP S605436 A JPS605436 A JP S605436A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- optical recording
- layer
- medium
- temp
- 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.)
- Pending
Links
Classifications
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/2432—Oxygen
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/24324—Sulfur
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2531—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising glass
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
- G11B7/2535—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polyesters, e.g. PET, PETG or PEN
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は繰り返して書き換え可能な光記録媒体に関する
。DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to repeatedly rewritable optical recording media.
ｌ米扶逅
光記録媒体は媒体と書き込みまたは読み取りヘッドとが
接触しないことから記録媒体の摩耗劣化が生じないとい
う利点がある。このため、種々の光記録媒体の開発研究
が現在盛んに行なわれている。このうちヒートモードの
光記録媒体は記録光を熱として利用するものであって、
特に書き込み情報の消去書き換えもできる記録媒体とし
ては光磁気桐材が知られている。しかしなが呟この尤磁
気桐材の情報書き込みと読み出しは磁気光学効果を利用
し偏光子および検光子を通した偏尤レーザビームを使用
しなければならない。それゆえ、光検出器の出力レベル
や信号対雑音比（Ｓ／Ｎ比）は今後の大川化段階を考え
ると必ずしも満足のν）く状態に達しているとは言し１
得なり・。The optical recording medium has the advantage that the recording medium does not suffer from wear and tear because there is no contact between the medium and the writing or reading head. For this reason, research and development of various optical recording media are currently being actively conducted. Among these, heat mode optical recording media use recording light as heat.
In particular, magneto-optical paulownia wood is known as a recording medium in which written information can be erased and rewritten. However, in order to write and read information from this magnetic paulownia material, it is necessary to utilize the magneto-optical effect and use a polarized laser beam that passes through a polarizer and analyzer. Therefore, although the output level and signal-to-noise ratio (S/N ratio) of the photodetector have not necessarily reached a satisfactory state considering the future stage of large-scale development,
It's a good deal.
ｌ偵
本発明は上記現状に鑑みてなされたものであって、その
１］的は製造が容易でＳ／Ｎ比の高Ｖ）安価な光記録媒
体を提供することである。また、本発明の別の］］的は
偏光子、検光子および磁気ヘッドを不要とした軽量で小
型な光検出系を提供することである。The present invention has been made in view of the above-mentioned current situation, and the first object is to provide an inexpensive optical recording medium that is easy to manufacture and has a high S/N ratio. Another object of the present invention is to provide a lightweight and compact photodetection system that does not require a polarizer, analyzer, or magnetic head.
ハ
」１記１］的を達成するために、本発明は半導体・金属
間の相転移によって生じる反射率の温度変化を利用して
記録を行う光記録媒体において遷移金属あるいは希土類
金属についての酸化物および／または硫化物を記録層と
して使用することミニある。In order to achieve the objective of the present invention, the present invention provides an optical recording medium that performs recording using temperature changes in reflectance caused by phase transition between semiconductors and metals. It is also possible to use sulfides and/or sulfides as recording layers.
半導体−金属の相転移によって生しる反射率の温度変化
は物質の作成法と組成とに依存して実用に適する゛温度
範囲のものが得られ、しかもその検出も光磁気材料のよ
うに磁気光学効果を利用しないため偏光子や検光子を用
いる必要がなく高いＳＺＮ比を期待することができる。Temperature changes in reflectance caused by semiconductor-metal phase transitions can be achieved within a temperature range suitable for practical use depending on the method and composition of the material. Since no optical effect is used, there is no need to use a polarizer or analyzer, and a high SZN ratio can be expected.
このため本発明では記録層の成分として遷移金属あるい
は希土類金属についての酸化物または硫化物のうちの少
なくとも１種を用いるが、記録層はｉｉｆ記酸化物およ
び／または前記硫化物のみから構成されていてもよくあ
るいはタングステンなどの池の成分を添加することもで
きる。遷移金属としてはその酸化物が適当であってその
例として■２０３、Ｔ ｉ ２０ ｓ、Ｆ ｅ ２０３
などをあげることができる。また、希土類金属としては
その硫化物が適当であってその例としてＳｍＳなどをあ
げることができる。記録層の厚さは１００〜２ Ｕ ０
ＯＡ好ましくは５００〜１００１） 人の範囲が適当
である。Therefore, in the present invention, at least one of the oxides and sulfides of transition metals or rare earth metals is used as a component of the recording layer, but the recording layer may be composed only of the oxides and/or sulfides of iif. Alternately, mineral components such as tungsten can be added. Suitable transition metals include their oxides, such as ■203, T i 20 s, Fe 203
etc. can be given. Suitable rare earth metals include sulfides thereof, such as SmS. The thickness of the recording layer is 100~2 U0
OA (preferably 500 to 1001) people is appropriate.
また本発明における基板の材料としては、ガラス、石英
、セラミック、プラスチック、紙、板状または箔状の金
属などの一般に使用されている記録材料の支持体を用い
ることができる。特に、プラスチックが安全性、平面性
、軽量、加工性などの点で好ましい。代表的なプラスチ
ックとしてポリエステル、アクリル樹脂、メタクリル樹
脂、ポリカーボネートなどがあげられる。Further, as the material of the substrate in the present invention, commonly used recording material supports such as glass, quartz, ceramic, plastic, paper, plate-shaped or foil-shaped metal can be used. In particular, plastic is preferable in terms of safety, flatness, light weight, workability, etc. Typical plastics include polyester, acrylic resin, methacrylic resin, and polycarbonate.
本発明の光記録媒体は基板上に遷移金属および／または
希土類金属の酸化物および／または硫化物ノ薄膜を１０
０〜２０００人の厚さで記Ｉ承層として適用することに
より作製することができる。The optical recording medium of the present invention has a thin film of transition metal and/or rare earth metal oxide and/or sulfide on a substrate.
It can be produced by applying it as a bearing layer at a thickness of 0 to 2000 mm.
適用法としては真空蒸着法、スパッタリング法、イオン
プレート法、気相成長法、エピタキシャル成長法、キャ
スト法、スピナー法、浸漬法などの薄膜形成法がある。Applicable methods include thin film forming methods such as vacuum evaporation, sputtering, ion plate, vapor phase growth, epitaxial growth, casting, spinner, and dipping.
特に成膜の容易さ、材料選択の自由度の大きさ、薄膜の
均一性、平滑性、成膜工程の簡単さ、大面積化などの点
から抵抗加熱、電子ビーム加熱などの真空蒸着法が好適
である。In particular, vacuum evaporation methods such as resistance heating and electron beam heating are preferred from the viewpoints of ease of film formation, greater freedom in material selection, uniformity and smoothness of thin films, simplicity of film formation process, and large area. suitable.
また、必要に応じてバインダーと混合して成膜すること
もできる。さらに必要に応じて保護層を設けてもよい。Further, if necessary, it can be mixed with a binder to form a film. Furthermore, a protective layer may be provided as necessary.
保護層は機械的強度が大で記録層とは反応しにくいもの
であれば任意のものでよく、その例としてＳｉ３Ｎ４．
５ｉｎ２、プラスチック薄層などをあげることができる
。保護層は厚さ１ｏｏｏＡ〜数ミクロンで適用され、そ
の適用法としてスパッタリング法、イオンプレート法、
真空蒸着法、イオンクラスタ法、ＣＶＤ法などが用いら
れる。The protective layer may be of any material as long as it has high mechanical strength and does not easily react with the recording layer; examples thereof include Si3N4.
Examples include 5in2, plastic thin layer, etc. The protective layer is applied to a thickness of 100A to several microns, and its application methods include sputtering, ion plate,
A vacuum evaporation method, an ion cluster method, a CVD method, etc. are used.
次に、本発明の光記録媒体の構成例を図面について説明
する。Next, an example of the structure of the optical recording medium of the present invention will be explained with reference to the drawings.
第１図に示すように、光記録媒体は基本的には基板１の
上に記録層２を有するものである。また、基板は任意温
度に保持できるような加熱または冷却装置を内蔵する構
造をとる。この温度可変装置によって書き込んだ記録の
保持または消去を行う。As shown in FIG. 1, an optical recording medium basically has a recording layer 2 on a substrate 1. Further, the substrate has a structure in which a heating or cooling device is built in so that the substrate can be maintained at an arbitrary temperature. Records written by this temperature variable device are retained or erased.
その可変装置の設定温度は使用している部材に依存する
ような反射率対温度のヒステレシス曲線によって任意に
とることができる。また、第２図に示すように記録層２
を湿度などによる劣化から保護するために必要に応して
保護層３を設けることができる。さらに、第３図に示す
ように光記録媒体の読み出し再生を効率よく行うために
基板１に案内溝４を設けてお外その上に記録層２を適用
することが好ましい。このようにすると再生装置の精度
が多少悪くてもサーボ技術で克服できるしかつサーボ機
構も簡単となり再生装置のコストを低くすることができ
る。また、第４図に示すように基板１の上に記録層２を
有する記録媒体をそれぞれの記録層２を空間５を介して
内側に配置して密封した構成（いわゆるサンドイッチ構
造）にして、記録層を外気と遮断することもできる。こ
うすると、ゴミの１１１着、キズの発生、有害力スとの
接触から保護できるため保存性等が向」ニする。２枚の
記録媒体の固定は例えば図示するようにスペーサ６を用
いてもよいしあるいは接着剤を用いて行ってもよい。The set temperature of the variable device can be set arbitrarily by a hysteresis curve of reflectance versus temperature depending on the component used. In addition, as shown in FIG.
A protective layer 3 can be provided as necessary to protect the material from deterioration due to humidity or the like. Furthermore, as shown in FIG. 3, in order to efficiently read and reproduce the optical recording medium, it is preferable to provide a guide groove 4 on the substrate 1 and apply the recording layer 2 on the outer surface. In this way, even if the accuracy of the playback device is somewhat poor, it can be overcome by servo technology, and the servo mechanism is also simplified, making it possible to reduce the cost of the playback device. In addition, as shown in FIG. 4, a recording medium having a recording layer 2 on a substrate 1 is constructed in such a manner that each recording layer 2 is placed inside with a space 5 in between and sealed (so-called sandwich structure). The layer can also be isolated from the outside air. In this way, it is possible to protect it from dust, scratches, and contact with harmful forces, thereby improving its shelf life. The two recording media may be fixed, for example, by using a spacer 6 as shown in the figure, or by using an adhesive.
本発明の光記録媒体の記録および再生はレーザ光例えば
Ｎ２、Ｈｅ−Ｃｄ、 Ａｒ、 ｔｈｅ Ｎｅ、ルビー、
半導体、色素レーザなどを用いて行われるが、特に軽量
性、取り扱いの容易さ、フンバクト性などの点から、半
導体レーザが好適である。この際本発明の光記録媒体は
従来の光磁気記録媒体のように光検出系に偏光−ｒ−１
検光子および磁気ヘッドを必要としない。Recording and reproduction of the optical recording medium of the present invention can be performed using laser beams such as N2, He-Cd, Ar, the Ne, ruby,
This is carried out using a semiconductor, a dye laser, etc., and a semiconductor laser is particularly suitable from the viewpoints of light weight, ease of handling, and ease of use. At this time, the optical recording medium of the present invention uses polarized light -r-1 in the photodetection system like a conventional magneto-optical recording medium.
No analyzer or magnetic head required.
χ施仰
以下ｔこ実施例をあげて本発明をさらに具体的に説明す
るかこれに限定されるものではない。The present invention will now be described in more detail with reference to Examples, but the present invention is not limited thereto.
実施例１
厚さ１．０＋ｎｍのポリエステル基板上に真空度１Ｏ−
７Ｔ ｏｒｒの条件で基板温度を室温にしてＶ２Ｏ３を
真空蒸着法で蒸着して厚さ１０００λの薄膜を形成した
。このＶ２Ｏ１層の反射率は半導体レーザ光（λ＝ｏ、
８ｏμ箱）に対して５０〜７０°Ｃで温度が上ると共に
約１０％低下した。この変化は温度に対してヒステレシ
スを示し光記録媒体として適していた。Example 1 Vacuum degree 1O- on a polyester substrate with a thickness of 1.0+nm
A thin film having a thickness of 1000λ was formed by depositing V2O3 using a vacuum evaporation method under conditions of 7T orr with the substrate temperature at room temperature. The reflectance of this V2O1 layer is the semiconductor laser light (λ=o,
As the temperature rose from 50 to 70°C, the temperature decreased by about 10%. This change showed hysteresis with respect to temperature, making it suitable as an optical recording medium.
実施例２
実施例１と同様にしてＶ２Ｏ３層を形成し、さらにこの
層の」二にＳｉ、Ｎ４層をスパッタ法により厚さ２０１
） ＯＡで設けた。Ｖ２Ｏ３層の反射率は実施例１と同
様な変化を示し記録媒体として適してい実施例３
厚さ「、０關のポリエステル基板に深さ４ （１１０〜
５００人の案内溝を設け、この上に真空度１Ｏ−７Ｔｏ
ｒｒの条１′１でＶ２Ｏ３を厚さ１０００人で真空蒸珀
した。このｖ、０３層の反射率は実施例１に記載したも
のと同様であった。Example 2 A V2O3 layer was formed in the same manner as in Example 1, and on top of this layer, a Si and N4 layer was formed to a thickness of 201 cm by sputtering.
) Provided by OA. The reflectance of the V2O3 layer showed the same change as in Example 1 and was suitable as a recording medium.
A guide groove for 500 people is provided, and a vacuum level of 1O-7To is placed on top of this.
V2O3 was vacuum evaporated in a thickness of 1000 on the 1'1 strip of rr. The reflectance of this v,03 layer was similar to that described in Example 1.
勾玉
」二連のように構成された本発明の光記録媒体は製造が
容易である上に高いＳ／Ｎ （Ｃ／Ｎ ）比を与えるこ
とがでとる。The optical recording medium of the present invention, which is configured like two sets of magatama beads, is easy to manufacture and can provide a high S/N (C/N) ratio.
ｖＳ１図ないし第４図は本発明による光記録媒体の種々
の構成を示す模式図である。
１・・砧（板、２・・・記録層、３・・・保護層、４・
・・案内溝、５・・・空間、６・・・スペーサ。
特許出願人 株式会社 リ コ −
グ
＝１vS1 to FIG. 4 are schematic diagrams showing various configurations of the optical recording medium according to the present invention. 1... Kinuta (board, 2... recording layer, 3... protective layer, 4...
...Guide groove, 5...Space, 6...Spacer. Patent applicant: Ricoh Co., Ltd.=1
Claims (1)
度の変化を得る光記録媒体において基板上に遷移金属あ
るいは希土類金属についでの酸化物または硫化物のうち
の少なくとも１種を含む記録層を有することを特徴とす
る、光記録媒体。In an optical recording medium whose optical density is changed by applying optical, electrical or thermal energy, a recording layer containing at least one of oxides or sulfides of transition metals or rare earth metals is provided on a substrate. An optical recording medium comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58110123A JPS605436A (en) | 1983-06-21 | 1983-06-21 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58110123A JPS605436A (en) | 1983-06-21 | 1983-06-21 | Optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS605436A true JPS605436A (en) | 1985-01-12 |
Family
ID=14527606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58110123A Pending JPS605436A (en) | 1983-06-21 | 1983-06-21 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS605436A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0846055A4 (en) * | 1995-06-07 | 1998-10-28 | Univ Syracuse | Optical storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5755212A (en) * | 1980-09-20 | 1982-04-02 | Aisin Seiki Co Ltd | Car air conditioner |
| JPS57175417A (en) * | 1981-04-20 | 1982-10-28 | Nissan Motor Co Ltd | Controller for revolution speed of fan of air conditioner for vehicle |
| JPS5814015B2 (en) * | 1975-07-31 | 1983-03-17 | 株式会社東芝 | Hikihazushi Souchi |
| JPS5854909B2 (en) * | 1976-05-20 | 1983-12-07 | 古河アルミニウム工業株式会社 | Method for manufacturing hollow structures by vacuum brazing |
-
1983
- 1983-06-21 JP JP58110123A patent/JPS605436A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814015B2 (en) * | 1975-07-31 | 1983-03-17 | 株式会社東芝 | Hikihazushi Souchi |
| JPS5854909B2 (en) * | 1976-05-20 | 1983-12-07 | 古河アルミニウム工業株式会社 | Method for manufacturing hollow structures by vacuum brazing |
| JPS5755212A (en) * | 1980-09-20 | 1982-04-02 | Aisin Seiki Co Ltd | Car air conditioner |
| JPS57175417A (en) * | 1981-04-20 | 1982-10-28 | Nissan Motor Co Ltd | Controller for revolution speed of fan of air conditioner for vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0846055A4 (en) * | 1995-06-07 | 1998-10-28 | Univ Syracuse | Optical storage medium |
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