JPS6363998B2 - - Google Patents
Info
- Publication number
- JPS6363998B2 JPS6363998B2 JP6963284A JP6963284A JPS6363998B2 JP S6363998 B2 JPS6363998 B2 JP S6363998B2 JP 6963284 A JP6963284 A JP 6963284A JP 6963284 A JP6963284 A JP 6963284A JP S6363998 B2 JPS6363998 B2 JP S6363998B2
- Authority
- JP
- Japan
- Prior art keywords
- lubricant
- magnetic disk
- film
- myristic acid
- magnetic
- 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
Links
- 239000000314 lubricant Substances 0.000 claims description 46
- 239000005373 porous glass Substances 0.000 claims description 6
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 20
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 19
- 235000021360 Myristic acid Nutrition 0.000 description 19
- 239000010410 layer Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 7
- 230000001050 lubricating effect Effects 0.000 description 7
- 238000009423 ventilation Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 4
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- UKMSUNONTOPOIO-UHFFFAOYSA-N docosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCC(O)=O UKMSUNONTOPOIO-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 fatty acid esters Chemical class 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- 235000021357 Behenic acid Nutrition 0.000 description 1
- DCXXMTOCNZCJGO-UHFFFAOYSA-N Glycerol trioctadecanoate Natural products CCCCCCCCCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC DCXXMTOCNZCJGO-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229940116226 behenic acid Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
Description
【発明の詳細な説明】
(a) 発明の技術分野
この発明は、密封型磁気デイスク装置に係り、
さらに詳細には磁気デイスク表面の潤滑膜を常に
安定に維持し得る装置構造に関するものである。[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a sealed magnetic disk device,
More specifically, the present invention relates to an apparatus structure capable of always stably maintaining a lubricating film on the surface of a magnetic disk.
(b) 技術の背景
近年、磁気デイスク装置においては、記録の高
密度・大容量化、およびメインテナンス・フリー
のための防塵構造の要求に沿つて密封型磁気デイ
スク装置が主流になつつある。一方、装置内に組
み込まれる磁気デイスクは、磁性膜をメツキやス
パツタ法で形成した、いわゆるメツキデイスクや
スパツタデイスクが多用され、これらデイスクで
は磁気ヘツドとの接触による破壊を防ぐための表
面潤滑膜が不可欠構成として設けられている。こ
の潤滑膜材料には、高級脂肪酸、脂肪酸のエステ
ル化物、高級アルコール、エーテル化合物、およ
びそれらの弗化物など潤滑性に優れた固体または
液体の潤滑剤が用いられている。(b) Background of the Technology In recent years, sealed magnetic disk devices have become mainstream in response to demands for higher density and larger capacity recording and dust-proof structures for maintenance-free operation. On the other hand, magnetic disks built into devices are often so-called plating disks or sputtering disks, in which a magnetic film is formed by plating or sputtering.These disks have a surface lubricating film to prevent damage due to contact with the magnetic head. is provided as an essential component. Solid or liquid lubricants with excellent lubricity, such as higher fatty acids, fatty acid esters, higher alcohols, ether compounds, and their fluorides, are used for this lubricating film material.
(c) 従来技術と問題点
ところが、上記密封型磁気デイスク装置におい
ては、磁気デイスクの高速回転に伴つて生ずる空
気摩擦（風損）によつて装置内の温度が50〜60
℃、設置条件によつては70℃程度にまで上昇する
ことがある。一方、高記録密度を達成するには、
磁気ヘツドの浮上量を小さくすることが不可欠で
あるが、40000BIPとか50000BIPにまで高密度化
すると磁気デイスクの表面潤滑膜の膜厚の影響が
無視できなくなり、100Å前後の極めて薄い潤滑
膜であることが要求される。しかし、この薄い潤
滑膜では、これに使用する前述の潤滑剤がいずれ
も温度上昇によつて蒸発・飛散する性質を有する
ものであることに起因して短時間（短期間）で蒸
発・飛散してしまう。従つて、装置内の温度が上
昇するようなことがあれば、デイスク表面は潤滑
性を失い、磁気ヘツドと接触した際には摩耗、破
壊が容易に生じることになつて記録情報が消失す
るという欠点があつた。(c) Prior art and problems However, in the above-mentioned sealed magnetic disk device, the temperature inside the device drops to 50-60°C due to air friction (windage loss) caused by the high-speed rotation of the magnetic disk.
Depending on the installation conditions, the temperature may rise to around 70°C. On the other hand, to achieve high recording density,
It is essential to reduce the flying height of the magnetic head, but when the density is increased to 40,000 BIP or 50,000 BIP, the influence of the thickness of the surface lubricant film on the magnetic disk cannot be ignored, and the lubricant film must be extremely thin, around 100 Å. is required. However, with this thin lubricant film, all the lubricants used in this film have the property of evaporating and scattering when the temperature rises, so they tend to evaporate and scatter in a short period of time. It ends up. Therefore, if the temperature inside the device rises, the disk surface loses its lubricity, and when it comes into contact with a magnetic head, it is easily worn out and destroyed, resulting in the loss of recorded information. There were flaws.
(d) 発明の目的
この発明は、以上のような従来の状況から密封
型磁気デイスク装置を対象にして、装置内の温度
が上昇しても磁気デイスク表面の潤滑性を持続で
きるようにした新しい装置構造の提供を目的とす
るものである。(d) Purpose of the Invention The present invention is aimed at a sealed magnetic disk device based on the conventional situation as described above, and is a new technology that maintains the lubricity of the magnetic disk surface even when the temperature inside the device increases. The purpose is to provide a device structure.
(e) 発明の構成
簡単に述べると本発明の磁気デイスク装置は、
表面に潤滑膜を被覆してなる磁気デイスクを気密
収容容器内に回転可能に収容した構成において、
情報の記録・再生に無関係の磁気デイスク面上に
前記気密収容容器内の温度上昇によつて蒸発する
潤滑剤発生源を設けたこと、該潤滑剤発生源が厚
膜の潤滑剤被覆層、またはデイスク面上に形成の
凹部群に貯蔵した潤滑剤、または多孔質ガラス被
覆層に含浸した潤滑剤より成ることを特徴とする
ものである。要するに、前記潤滑剤発生源からの
潤滑剤蒸気により、前記温度上昇に伴なう磁気デ
イスク表面上の潤滑膜の蒸発消失を抑制しようと
するものである。(e) Structure of the invention Briefly stated, the magnetic disk device of the present invention has the following features:
In a structure in which a magnetic disk whose surface is coated with a lubricating film is rotatably housed in an airtight container,
A lubricant generating source that evaporates due to a temperature rise in the airtight storage container is provided on a magnetic disk surface unrelated to recording/reproducing information, the lubricant generating source is a thick lubricant coating layer, or It is characterized by comprising a lubricant stored in a group of recesses formed on the disk surface, or a lubricant impregnated into a porous glass coating layer. In short, the lubricant vapor from the lubricant generation source is used to suppress the evaporation and disappearance of the lubricant film on the magnetic disk surface due to the temperature rise.
(f) 発明の実施例
以下、この発明の好ましい実施例につき図面を
参照して詳細に説明する。(f) Embodiments of the Invention Preferred embodiments of the invention will now be described in detail with reference to the drawings.
第１図は本発明の磁気デイスク装置を概念的に
示す要部断面図であり、磁気デイスク１の表面に
は例えば高級脂肪酸の一種であるミリスチン酸か
らなる潤滑膜が70Åの厚さで被覆されている。こ
の磁気デイスク１は、基板２上に回転自在に支持
された回転機構３の回転軸４に固着したハブ機構
５に複数枚（図の場合８枚）を組にして固定さ
れ、このハブ機構とともに回転駆動される。この
ハブ機構５は中空体より成り、外体面には中心通
気穴となる空間部５１と連通して前記各磁気デイ
スク相互間に循環雰囲気を構成する複数の通気小
穴５２が、空間部壁面には前記各通気小穴５２を
覆うようにフイルタ６がそれぞれ設けられてい
る。しかして、基板２には回転自在の磁気デイス
ク群を密封するための気密収容蓋体７が設けられ
ている。 FIG. 1 is a cross-sectional view of a main part conceptually showing the magnetic disk device of the present invention. The surface of the magnetic disk 1 is coated with a lubricating film made of myristic acid, which is a type of higher fatty acid, to a thickness of 70 Å. ing. A plurality of magnetic disks (eight disks in the figure) are fixed to a hub mechanism 5 fixed to a rotating shaft 4 of a rotating mechanism 3 that is rotatably supported on a substrate 2, and together with this hub mechanism. Rotationally driven. This hub mechanism 5 is made of a hollow body, and a plurality of small ventilation holes 52 are formed on the outer surface of the body and communicate with a space 51 serving as a central ventilation hole to create a circulating atmosphere between the respective magnetic disks, and on the wall surface of the space. A filter 6 is provided to cover each of the small ventilation holes 52. The substrate 2 is provided with an airtight housing lid 7 for sealing the rotatable magnetic disk group.
ここまでの構成は従来の磁気デイスク装置と大
して変わらないが、本発明では前記磁気デイスク
群のうち、情報の記録・再生に無関係の磁気デイ
スク（例えば、符号１Ａで示したもの）の上面に
おいて前記デイスク表面の潤滑膜と同材料のミリ
スチン酸源、すなわち潤滑剤発生源８を設けてい
る。なお、ここで言う情報記録・再生に無関係の
磁気デイスク１Ａは、情報記録・再生専用の磁気
デイスク群を粉塵などから保護するためにこれら
の上方、あるいは下方に配置した、所謂ダミーデ
イスク（不良の磁気デイスクがよく用いられる）
や、新設のデイスクが対象となる。このようなデ
イスク上面に設置の潤滑剤発生源８の具体構成に
ついて、第２図ａ，ｂおよびｃの要部拡大断面図
に示す３例を述べる。 The configuration up to this point is not much different from a conventional magnetic disk device, but in the present invention, among the magnetic disk groups, the upper surface of a magnetic disk unrelated to recording/reproducing information (for example, the one indicated by reference numeral 1A) A myristic acid source made of the same material as the lubricating film on the disk surface, that is, a lubricant generating source 8 is provided. The magnetic disk 1A unrelated to information recording/reproduction mentioned here is a so-called dummy disk (defective disk) placed above or below a group of magnetic disks dedicated to information recording/reproduction to protect them from dust. magnetic disks are often used)
This applies to newly installed disks. Three examples of specific configurations of the lubricant generating source 8 installed on the upper surface of the disk will be described, as shown in the enlarged sectional views of main parts in FIGS. 2a, b and c.
まず第２図ａの潤滑剤発生源は、ダミーデイス
クの磁性膜１１上にスパツター技法などで厚さ
500Åに被着させたミリスチン酸の潤滑剤層１２
から構成されている。なお、１３は前記記録・再
生専用の磁気デイスク１と同じ8.25インチの直径
（片側表面積239cm2）を有するデイスク基板であ
る。 First, the lubricant source shown in FIG.
Lubricant layer 12 of myristic acid deposited to 500 Å
It consists of Note that 13 is a disk substrate having a diameter of 8.25 inches (surface area on one side 239 cm 2 ), which is the same as the magnetic disk 1 for recording and reproduction.
次の第２図ｂで示す潤滑剤発生源は、ダミーデ
イスクの磁性膜１１表面にフオトリソグラフイー
技法などで多数（１cm2当たり2000個程度）形成し
た直径約30μm、深さ2μmの微小凹部１４にミリ
スチン酸１５を充填した構成である。 The lubricant generation source shown in FIG. 2b is a micro-recess 14 with a diameter of about 30 μm and a depth of 2 μm, which is formed in large numbers (approximately 2000 per cm 2 ) on the surface of the magnetic film 11 of the dummy disk by photolithography. It has a structure in which myristic acid 15 is filled in.
次の第２図ｃで示す潤滑剤発生源は、ダミーデ
イスクの磁性膜１１表面に被覆した厚さ2μmの多
孔質ガラス層１６にミリスチン酸を含浸させた構
成である。この多孔質ガラス層１６は、オーエン
ス・イリノイ社製のガラスレジン＃150を磁性膜
表面に塗布および熱処理することで形成できる。
磁性膜上に被着されたガラスレジン膜は多孔質で
あるので、前記ミリスチン酸はキシレンで希釈し
てから当該膜面に塗布すれば、その内の孔群に簡
単に吸蔵される。これによれば、キシレン蒸発除
去後に1.3mgのミリスチン酸がガラスレジン膜に
貯蔵できた。 The lubricant generation source shown in FIG. 2c has a structure in which a porous glass layer 16 with a thickness of 2 μm coated on the surface of the magnetic film 11 of a dummy disk is impregnated with myristic acid. This porous glass layer 16 can be formed by coating the surface of the magnetic film with glass resin #150 manufactured by Owens-Illinois and subjecting it to heat treatment.
Since the glass resin film deposited on the magnetic film is porous, if the myristic acid is diluted with xylene and then applied to the surface of the film, it will be easily occluded in the pores therein. According to this, 1.3 mg of myristic acid could be stored in the glass resin membrane after xylene was removed by evaporation.
さて、このようにダミーデイスク１Ａ上に貯蔵
されたミリスチン酸潤滑剤は、装置内の温度が上
昇すると蒸発・飛散し始める。この蒸発・飛散に
よるミリスチン酸蒸気は、装置内の気密空間を漂
うだけでなく装置内壁すなわち気密収容蓋体７の
内壁面などに吸着する。なお、70℃におけるミリ
スチン酸蒸気の飽和蒸気圧は１×10-4mmHg程度
であるので、蒸発・飛散するミリスチン酸の量は
雰囲気１当たりで約0.0013mgとなり、またミリ
スチン酸の吸着量は面積100cm2当たり0.019mgとな
る。従つて、前述した本実施例装置の実行内容積
を６、装置内壁および装置内の磁気デイスクを
除く諸部品の表面積を2500cm2とした場合を考える
と、装置内の気密空間には約0.0078mgのミリスチ
ン酸が漂い、0.475mg程度のミリスチン酸が装置
内壁面などに単分子層形態（高温雰囲気のため）
で吸着される。ゆえに、この雰囲気中の飽和蒸気
および吸着する蒸気の量は0.48mgであるが、これ
は第２図ａのミリスチン酸潤滑剤層１２がほぼ21
分子層、0.908mgに相当し、また第２図ｂの微小
凹部群１４が0.54mg程度のミリスチン酸１５を貯
蔵し、さらに第２図ｃのガラスレジン膜１６が
1.3mgのミリスチン酸を含浸しているので、それ
らのミリスチン酸が蒸発・飛散することによつて
十分に賄うことが可能である。 Now, the myristic acid lubricant thus stored on the dummy disk 1A starts to evaporate and scatter when the temperature inside the device increases. The myristic acid vapor resulting from this evaporation and scattering not only floats in the airtight space within the device, but also adsorbs onto the inner wall of the device, that is, the inner wall surface of the airtight housing lid 7. Note that the saturated vapor pressure of myristic acid vapor at 70°C is approximately 1 × 10 -4 mmHg, so the amount of myristic acid that evaporates and scatters is approximately 0.0013 mg per atmosphere, and the amount of myristic acid adsorbed is The amount is 0.019mg per 100cm2 . Therefore, assuming that the internal volume of the apparatus of this embodiment described above is 6, and the surface area of the inner walls of the apparatus and the various parts inside the apparatus excluding the magnetic disk is 2500 cm2 , the airtight space inside the apparatus contains approximately 0.0078 mg. of myristic acid floats around, and about 0.475 mg of myristic acid forms a monomolecular layer on the inner wall of the device (due to the high temperature atmosphere).
It is adsorbed by. Therefore, the amount of saturated vapor and adsorbed vapor in this atmosphere is 0.48 mg, which is approximately 21 mg of myristic acid lubricant layer 12 in FIG. 2a.
The molecular layer corresponds to 0.908 mg, and the micro-recess group 14 in FIG. 2b stores about 0.54 mg of myristic acid 15, and the glass resin film 16 in FIG.
Since it is impregnated with 1.3 mg of myristic acid, the myristic acid can be sufficiently supplied by evaporation and scattering.
このように装置内の温度上昇に伴つて蒸発・飛
散した潤滑剤（ミリスチン酸）蒸気は、磁気デイ
スク１の高速回転に伴つて第１図中矢印で示す方
向に流れる熱気流とともに、ハブ機構５の中心通
気穴５１内に上下方向より流入し、フイルタ６を
通つて粉塵や潤滑剤蒸気の大粒子を排除された
後、ハブ機構５の通気小穴５２を通つて各磁気デ
イスク１の対向空間に流出する経路で装置内を循
環する。この結果、各磁気デイスク表面の潤滑膜
が前述した風損による温度上昇により蒸発・飛散
する際の当該潤滑剤の蒸気圧と、同磁気デイスク
表面の潤滑膜を取り巻く前記循環潤滑剤蒸気の蒸
気圧とが略平衡状態となり、言い換えると装置内
の潤滑剤蒸気が飽和蒸気圧で保たれることにな
る。このため、磁気デイスク表面上の潤滑膜は蒸
発・飛散が抑制されて潤滑性が維持され、その結
果磁気ヘツドと接触した際のデイスク記録面の摩
耗、破壊が防止される。 In this way, the lubricant (myristic acid) vapor that evaporated and scattered as the temperature inside the device increased, along with the hot air flow flowing in the direction shown by the arrow in FIG. 1 as the magnetic disk 1 rotated at high speed, It flows into the central ventilation hole 51 from above and below, passes through the filter 6 to remove large particles of dust and lubricant vapor, and then passes through the ventilation hole 52 of the hub mechanism 5 into the space facing each magnetic disk 1. It circulates within the device through the outflow path. As a result, the vapor pressure of the lubricant when the lubricant film on the surface of each magnetic disk evaporates and scatters due to the temperature rise due to windage damage mentioned above, and the vapor pressure of the circulating lubricant vapor surrounding the lubricant film on the surface of the magnetic disk. In other words, the lubricant vapor within the device is maintained at a saturated vapor pressure. Therefore, evaporation and scattering of the lubricant film on the surface of the magnetic disk are suppressed and lubricity is maintained, and as a result, wear and destruction of the disk recording surface when it comes into contact with a magnetic head is prevented.
別表は、上述したミリスチン酸、ベヘン酸、あ
るいはステアリン酸のエステル化物（ステアリ
ン）をダミーデイスク１Ａ上に第２図ａ，ｂおよ
びｃのように設けた本発明装置Ａ，ＢおよびＣ
と、このような潤滑剤発生源を具備しない従来装
置Ｄとにおける70℃の耐熱性試験結果に基づくデ
イスク表面潤滑膜の摩擦係数を比較して示したも
のである。この表で明らかなように、例えば試験
前に0.22摩擦係数を有したミリスチン酸の潤滑膜
の場合、従来装置Ｄ−１では８時間後に摩擦係数
が0.4以上となり潤滑性が不良となつたが、第２
図ａによる本発明装置Ａ−１では160時間経過後
も0.21の摩擦係数を、第２図ｂ，ｃによる本発明
装置Ｂ−１，Ｃ−１では共に160時間経過後も
0.22の摩擦係数をそれぞれ有して試験前と全く変
わりない良好な潤滑性を持続していることが判
る。その他の潤滑剤もこれと同様の潤滑性を持続
している。 The attached table shows devices A, B, and C of the present invention in which the above-mentioned myristic acid, behenic acid, or stearic acid ester (stearin) is provided on a dummy disk 1A as shown in FIG. 2 a, b, and c.
This figure shows a comparison of the coefficient of friction of the lubricant film on the disk surface based on the results of a heat resistance test at 70° C. in the conventional device D which is not equipped with such a lubricant generating source. As is clear from this table, for example, in the case of a lubricating film of myristic acid that had a friction coefficient of 0.22 before the test, in the conventional device D-1, the friction coefficient became 0.4 or more after 8 hours, resulting in poor lubricity. Second
The invention device A-1 shown in Figure a maintains a friction coefficient of 0.21 even after 160 hours, and the invention devices B-1 and C-1 shown in Figures 2 b and c both maintain a friction coefficient of 0.21 even after 160 hours.
It can be seen that each has a friction coefficient of 0.22, maintaining good lubricity that is completely unchanged from before the test. Other lubricants maintain similar lubricity.
なお、本発明では上記潤滑剤の他、ミリスチン
酸のエステル化物（ミリスチン）、高級アルコー
ル、それらのフツ素化物などの高温時に蒸発する
固体または液体の潤滑剤が適用可能である。ま
た、このような潤滑剤発生源を設置するダミーデ
イスクの枚数や、その面上に被覆する潤滑剤層お
よび多孔質ガラス層の厚み、ならびに同デイスク
面上に形成する微小凹部の形状と分布密度は、前
述した実施例に限定されるものでなく、装置内容
積と内壁面積に応じて決定されるものである。 In the present invention, in addition to the above lubricants, solid or liquid lubricants that evaporate at high temperatures, such as esters of myristic acid (myristic), higher alcohols, and fluorinated products thereof, can be used. In addition, the number of dummy disks on which such lubricant generation sources are installed, the thickness of the lubricant layer and porous glass layer coated on the surface of the dummy disks, and the shape and distribution density of the minute recesses formed on the disk surface. is not limited to the embodiment described above, but is determined depending on the internal volume of the device and the area of the inner wall.
(g) 発明の効果
以上の説明から明らかなように、この発明の密
封型磁気デイスク装置によれば、簡単な機構改良
により密封容器内おいて回転駆動される磁気デイ
スク表面の潤滑膜の蒸発・飛散が抑制され、磁気
デイスクの表面潤滑性が持続できるので、磁気ヘ
ツドとの接触時における磁気デイスク表面の摩
耗、破壊が防止できる効果を奏する。(g) Effects of the Invention As is clear from the above description, the sealed magnetic disk device of the present invention can reduce the evaporation and evaporation of the lubricant film on the surface of a magnetic disk rotated in a sealed container by simple mechanical improvement. Since scattering is suppressed and the surface lubricity of the magnetic disk can be maintained, wear and breakage of the magnetic disk surface upon contact with a magnetic head can be prevented.
第１図はこの発明による磁気デイスク装置の基
本構成を概念的に示す要部断面図、第２図は第１
図における潤滑剤発生源の具体例を示す要部拡大
断面図である。
１：磁気デイスク、２：基板、３：回転機構、
４：回転軸、５：ハブ機構、６：フイルタ、７：
気密収容蓋体、８：潤滑剤発生源、１１：磁性
膜、１２：ミリスチン酸潤滑剤層、１３：デイス
ク基板、１４：微小凹部、１５：ミリスチン酸、
１６：多孔質ガラス層、５１：中心通気穴、５
２：通気子穴。
FIG. 1 is a sectional view of main parts conceptually showing the basic configuration of a magnetic disk device according to the present invention, and FIG.
FIG. 2 is an enlarged sectional view of a main part showing a specific example of a lubricant generation source in the figure. 1: Magnetic disk, 2: Substrate, 3: Rotation mechanism,
4: Rotating shaft, 5: Hub mechanism, 6: Filter, 7:
Airtight storage lid, 8: Lubricant source, 11: Magnetic film, 12: Myristic acid lubricant layer, 13: Disk substrate, 14: Micro recess, 15: Myristic acid,
16: Porous glass layer, 51: Center ventilation hole, 5
2: Ventilator hole.
【表】【table】
Claims (1)
気密収容容器内に回転可能に収容して成る装置構
成において、情報の記録・再生に無関係の磁気デ
イスク面上に前記気密収容容器内の温度上昇によ
つて蒸発する潤滑剤発生源を設けてなることを特
徴とする磁気デイスク装置。 ２ 前記潤滑剤発生源が、磁気デイスク面上に被
覆された厚膜の潤滑剤層より成ることを特徴とす
る特許請求の範囲第１項に記載の磁気デイスク装
置。 ３ 前記潤滑剤発生源が、磁気デイスク面上に形
成した複数の凹部に貯蔵された潤滑剤より成るこ
とを特徴とする特許請求の範囲第１項に記載の磁
気デイスク装置。 ４ 前記潤滑剤発生源が、磁気デイスク面上に被
覆された多孔質ガラス層に含浸した潤滑剤より成
ることを特徴とする特許請求の範囲第１項に記載
の磁気デイスク装置。[Scope of Claims] 1. In an apparatus configuration in which a magnetic disk whose surface is coated with a lubricant film is rotatably housed in an airtight container, the airtight layer is placed on the surface of the magnetic disk unrelated to recording and reproducing information. A magnetic disk device characterized by being provided with a lubricant generating source that evaporates as a temperature rises within a storage container. 2. The magnetic disk device according to claim 1, wherein the lubricant source comprises a thick lubricant layer coated on the magnetic disk surface. 3. The magnetic disk device according to claim 1, wherein the lubricant generation source comprises lubricant stored in a plurality of recesses formed on the magnetic disk surface. 4. The magnetic disk device according to claim 1, wherein the lubricant source comprises a lubricant impregnated into a porous glass layer coated on the magnetic disk surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6963284A JPS60212882A (en) | 1984-04-06 | 1984-04-06 | Magnetic disc device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6963284A JPS60212882A (en) | 1984-04-06 | 1984-04-06 | Magnetic disc device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60212882A JPS60212882A (en) | 1985-10-25 |
| JPS6363998B2 true JPS6363998B2 (en) | 1988-12-09 |
Family
ID=13408426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6963284A Granted JPS60212882A (en) | 1984-04-06 | 1984-04-06 | Magnetic disc device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60212882A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0316080A (en) * | 1990-05-18 | 1991-01-24 | Teac Corp | Disk driving device |
-
1984
- 1984-04-06 JP JP6963284A patent/JPS60212882A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60212882A (en) | 1985-10-25 |
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