JPS605419A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS605419A JPS605419A JP58111598A JP11159883A JPS605419A JP S605419 A JPS605419 A JP S605419A JP 58111598 A JP58111598 A JP 58111598A JP 11159883 A JP11159883 A JP 11159883A JP S605419 A JPS605419 A JP S605419A
- Authority
- JP
- Japan
- Prior art keywords
- lubricant
- magnetic
- holes
- recording medium
- film
- 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
- 239000000314 lubricant Substances 0.000 claims abstract description 42
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 24
- 230000005415 magnetization Effects 0.000 claims description 2
- 239000000049 pigment Substances 0.000 description 10
- 229920003002 synthetic resin Polymers 0.000 description 9
- 239000000057 synthetic resin Substances 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- -1 carbon Chemical compound 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000012976 tarts Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/71—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the lubricant
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
- G11B5/7334—Base layer characterised by composition or structure
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、磁気ディスク装置等に使用される磁気記録媒
体に関し、特にＣＳＳタイプの浮上磁気ヘッドを使用す
る磁気記録再生装置用磁気記録媒体の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic recording medium used in a magnetic disk device, etc., and in particular to an improvement of a magnetic recording medium for a magnetic recording/reproducing device using a CSS type floating magnetic head. Regarding.
磁気ディスク装置においては、高速回転する円盤と磁気
へ・ノド間に浮力を発生さ一仕、＆ｉ気へ、７ドを浮上
させた状態で情報の読書きが行なわれる。In a magnetic disk drive, information is read and written by creating buoyancy between a disk that rotates at high speed and a magnetic node, thereby keeping the disk afloat.
ところが磁気ディスクの回転開始時およびｆ挙止１４に
は浮力が小さいので、磁気へ・ノドが回転してし）る磁
気ディスクに摺動接触する。このようＧこｆｉｌｌ気デ
ィスクの回転開始、停止時に磁気へｙ ｌ・′力＜＆を
気ディスクと接触する方式をＣＳ Ｓ （Ｃｏｎｔａｃ
ｔ ５ｔａｒｔ ５ｔｏｐ）方式と呼んでいる。このよ
うＧこＣ３Ｓ方式では、磁気ディスクの回転開始、停止
Ｈｆ４こ磁気ヘッドが磁気ディスク面と摺動接触するの
で、Ｍｌ気ヘッドが摺動接触するへ・ノド゛ランデイン
ク゛ノ゛−ンの磁気記録媒体表面が摩耗して、摩耗粉力
り仔を気ヘッドに付着したり磁気記録媒体の全面Ｇこ１
広散じ、ヘンドクラソシュを引き起す原因となる。した
力くって磁気記録媒体表面の摩耗を極力防止ｊ″ること
か必要となる。However, since the buoyancy is small at the start of rotation of the magnetic disk and at the f-stop 14, the throat slides into contact with the rotating magnetic disk. In this way, CS S (Contac
It is called the t 5 tart 5 top) method. In this G/C3S system, since the magnetic disk starts and stops rotating, the Hf4 magnetic head comes into sliding contact with the magnetic disk surface, so the Ml head comes into sliding contact with the magnetic disk, and magnetic recording of the nozzle and land ink is performed. The surface of the magnetic recording medium may become abraded, causing abrasion particles to adhere to the magnetic head or causing the entire surface of the magnetic recording medium to become exposed.
It spreads widely and causes hendokrasosh. It is necessary to prevent wear on the surface of the magnetic recording medium as much as possible by applying such force.
磁気ヘッドの摺動接触の際の摩耗を軽減するために、第
１図に示すように、従来力＼ら化１生塗ＩＩＩ ２上に
潤滑剤４を塗布して、磁気へ・ノトスライタ′−の滑り
をよくすることが行なわれている。アルミニウム基板ｌ
上に形成された磁性膜１１５ｔｉ２は通常ピンホール３
などの欠陥が発生するが、この欠陥は、潤滑剤４を含浸
する上ではかえって好都合である。In order to reduce wear during sliding contact of the magnetic head, as shown in FIG. Efforts are being made to improve the slippage. aluminum substrate l
The magnetic film 115ti2 formed thereon usually has a pinhole 3.
Although such defects occur, these defects are actually convenient for impregnating the lubricant 4.
ところが潤滑剤４を塗布すると、潤滑剤４で磁気ヘッド
スライダ−が磁気記録媒体面に粘着し、磁気記録媒体が
回転開始する際に、磁気ヘッドの支持機構を破損したり
へ・７ドクラソシユを招く恐れがある。即ち潤滑剤を塗
布して滑りをよくすれば、初期の間は摩擦係数が小さく
有効であるが、経時的に潤滑剤が消耗すると、潤滑作用
が低下し、摩耗粉が発生ずる。かといって大量に潤滑剤
を塗布すると、ピンボールから溢れ出し、磁気記録媒体
が停止しスライダーと接触している際に、潤滑剤でスラ
イダーが磁気記録媒体面に粘着するので、次に磁気記録
媒体が回転開始するときに、磁気ヘッドが急激に磁気記
録媒体面から引き剥がされる際の衝撃でヘンドクラソシ
ュを招いたり、磁気ヘッドを支持しているジンバルを破
損したりする恐れがある。However, when the lubricant 4 is applied, the magnetic head slider sticks to the surface of the magnetic recording medium due to the lubricant 4, and when the magnetic recording medium starts rotating, the magnetic head support mechanism may be damaged. There is a fear. That is, if a lubricant is applied to improve slippage, it is effective because the coefficient of friction is small in the initial stage, but as the lubricant is consumed over time, the lubricating effect decreases and wear particles are generated. On the other hand, if a large amount of lubricant is applied, it will overflow from the pinball, and when the magnetic recording medium is stopped and in contact with the slider, the lubricant will cause the slider to stick to the surface of the magnetic recording medium. When the medium starts rotating, there is a risk that the impact when the magnetic head is suddenly peeled off from the surface of the magnetic recording medium may cause hendoklash or damage the gimbal supporting the magnetic head.
ところでデータ処理装置などに使用される磁気ディスク
装置は、近年急激なデータ記録密度の向上、大容量化が
進み、また高速性、経済性の点から装置は小型化の傾向
にある。このような高記録密度化の要求を満たすには、
記録媒体の磁性膜の膜厚を薄くすることが有効である。Incidentally, in recent years, magnetic disk devices used in data processing devices and the like have rapidly increased their data recording density and capacity, and there is also a trend toward smaller devices from the viewpoint of high speed and economical efficiency. To meet this demand for higher recording density,
It is effective to reduce the thickness of the magnetic film of the recording medium.
即ち磁性粉を合成樹脂などのバインダに混入し、これを
アルミニウム基板にスピンコードして磁性塗膜を形成し
、磁気記録媒体の磁性膜を構成しているが、この磁性塗
膜の厚さを薄くする。磁性膜を薄くするには、磁性塗料
のスピンコード後に焼付は乾燥し、次いでポリッシュを
行なって研摩することが一般に行なわれる。That is, magnetic powder is mixed into a binder such as synthetic resin, and this is spin-coded onto an aluminum substrate to form a magnetic coating film, which constitutes the magnetic film of the magnetic recording medium. make it thin. In order to make the magnetic film thinner, it is common practice to spin coat the magnetic paint, dry it, and then polish and polish it.
高記録密度化の要求からこのように磁性塗膜を薄くする
と、磁性塗膜中の欠陥であるピンボールが浅くなって潤
滑剤の含浸量が減少し、潤滑剤の保持能力が低下する。If the magnetic coating film is made thinner in this way due to the demand for higher recording density, pinballs, which are defects in the magnetic coating film, become shallower, reducing the amount of lubricant impregnated, and lowering the lubricant retention ability.
従って磁性塗膜が薄くて高記録密度の磁気記録媒体はど
、潤滑剤の含浸能力が低下し、潤滑剤の寿命が短かく、
長期使用に耐えることができなくなる。Therefore, in magnetic recording media with a thin magnetic coating and high recording density, the lubricant impregnation ability is reduced, and the lubricant life is shortened.
It becomes impossible to withstand long-term use.
本発明は、従来の磁性塗膜で構成される磁気記録媒体に
おけるこのような問題を解消し、潤滑剤の持ちがよくな
るように、大量の潤滑剤を含浸可能とすることにある。The object of the present invention is to solve these problems in conventional magnetic recording media composed of magnetic coatings, and to make it possible to impregnate a large amount of lubricant so that the lubricant lasts well.
この目的を達成するために講じた本発明による技術的手
段は、アルミニウムなどの非磁性体基板に、多孔質の非
磁性層を設け、その上にピンホールなどの微細孔を有す
る磁性塗膜を形成し、該微細孔および多孔質非磁性層の
孔中に潤滑剤を含浸した構成を採っている。The technical means of the present invention taken to achieve this objective is to provide a porous nonmagnetic layer on a nonmagnetic substrate such as aluminum, and coat the layer with a magnetic coating film having micropores such as pinholes. The micropores and the pores of the porous nonmagnetic layer are impregnated with a lubricant.
次に本発明による磁気記録媒体が実際上どのように具体
化されるかを実施例で説明する。第２図は本発明による
磁気記録媒体の実施例を示す縦断面図である。アルミニ
ウム基板１上には、多孔質の非磁性層５を形成し、その
上に磁性膜膜２を設けである。多孔質の非磁性層５中に
は、多数の空洞状の孔６・・・が形成されており、これ
らの内の相当数の孔６・・・が、表面の磁性塗膜２のピ
ンボール３・・・と連通している。Next, examples will be used to explain how the magnetic recording medium according to the present invention is actually implemented. FIG. 2 is a longitudinal sectional view showing an embodiment of the magnetic recording medium according to the present invention. A porous nonmagnetic layer 5 is formed on an aluminum substrate 1, and a magnetic film 2 is provided thereon. A large number of hollow pores 6... are formed in the porous non-magnetic layer 5, and a considerable number of these pores 6... are the pinballs of the magnetic coating film 2 on the surface. It communicates with 3...
そのため、潤滑剤４を塗布して含浸すると、潤ｌｈ剤が
非磁性層５の孔６・・・および磁性塗膜２のピンボール
３・・・中に含浸される。そして非磁性層の孔６・・・
中に大量の潤滑剤が含浸保持されるので、磁性塗膜２の
表面まで大量の潤滑剤で覆われるよう塗布しなくても、
非磁性層の無数の孔６・・・から徐々に潤滑剤が磁性塗
膜２０表面に供給される。Therefore, when the lubricant 4 is applied and impregnated, the lh agent is impregnated into the holes 6 of the non-magnetic layer 5 and the pinballs 3 of the magnetic coating 2. And the hole 6 of the nonmagnetic layer...
Since a large amount of lubricant is impregnated and held inside, there is no need to apply a large amount of lubricant to cover the surface of the magnetic coating 2.
The lubricant is gradually supplied to the surface of the magnetic coating film 20 from the numerous holes 6 in the nonmagnetic layer.
特に磁気ヘッドスライダ−が磁気記録媒体面と摺動する
際の発熱で、非磁性層の孔６・・・中の潤ＹＷｉ剤の粘
度が低下して遊離し、磁気記録媒体表面に浸出し易くな
るので、孔６・・・中の潤滑剤が円滑かつ一定して磁気
記録媒体表面に供給される。このように磁性塗膜２の下
の非磁性層５から少しずつ潤滑剤を供給するようにすれ
ば、磁気記録媒体表面に大量の潤滑剤を塗布したために
、磁気ヘノｌ’−が磁気記録媒体表面に粘着するような
弊害も解消される。しかも非磁性層の無数の孔６・・・
は潤滑剤を大量に含浸できるので潤滑剤の持ちが良く、
磁性塗膜２が薄くピンホール３が浅くても、長期にわた
り安定して磁性塗膜表面に潤滑剤を供給することができ
る。なお磁性塗膜２のピンホール３は、この磁性塗膜２
に記録された情報に影響を与えない程度の大きさとし、
特に情報記録のための最小磁化反転間隔より小さい。In particular, due to the heat generated when the magnetic head slider slides on the surface of the magnetic recording medium, the viscosity of the lubricant YWi agent in the holes 6 of the non-magnetic layer decreases and becomes liberated, which easily leaks onto the surface of the magnetic recording medium. Therefore, the lubricant in the holes 6 is smoothly and constantly supplied to the surface of the magnetic recording medium. If the lubricant is supplied little by little from the non-magnetic layer 5 under the magnetic coating film 2 in this way, a large amount of lubricant applied to the surface of the magnetic recording medium will cause the magnetic heel l'- to The problem of sticking to surfaces is also eliminated. Moreover, countless holes 6 in the non-magnetic layer...
can be impregnated with a large amount of lubricant, so the lubricant lasts well.
Even if the magnetic coating film 2 is thin and the pinholes 3 are shallow, lubricant can be stably supplied to the surface of the magnetic coating film over a long period of time. Note that the pinhole 3 in the magnetic coating film 2 is
be large enough not to affect the information recorded in the
In particular, it is smaller than the minimum magnetization reversal interval for information recording.
非磁性層５は、合成樹脂より成る塗膜を多孔質にするか
、あるいは５ｉＯｚなどをスパッタなどで被着した後多
孔質に形成することによって得られる。第３図は前者の
多孔質の合成樹脂塗膜を有する磁気記録媒体の製造方法
を説明する工程図であり、次にこの工程図に従って製造
方法を説明する。The non-magnetic layer 5 can be obtained by making a coating made of synthetic resin porous, or by depositing 5iOz or the like by sputtering or the like and then forming it porous. FIG. 3 is a process diagram illustrating the former method of manufacturing a magnetic recording medium having a porous synthetic resin coating film. Next, the manufacturing method will be explained according to this process diagram.
＋１１アルミニウム基板の表面を鏡面仕上げし、平ンｈ
な面にする。+11 The surface of the aluminum substrate is mirror finished, and the surface is flat
Make it look nice.
（２）非磁性の顔料と溶剤を混入した合成樹脂をスピン
コードする。顔料には、無機顔料として酸化亜鉛、炭酸
カルシウムなどがあり、有機顔料としてカーボンなどが
あるが、無機顔料が安定性の面で優れている。また合成
樹脂としては、フェノール、アクリル、エポキシなどが
適している。(2) Spin-coding synthetic resin mixed with non-magnetic pigment and solvent. Pigments include inorganic pigments such as zinc oxide and calcium carbonate, and organic pigments such as carbon, but inorganic pigments are superior in terms of stability. Further, as the synthetic resin, phenol, acrylic, epoxy, etc. are suitable.
（３１１８０〜３００℃程度の温度で、焼き付けを行な
い、多孔質にする。即ち顔料が混入された樹脂を加熱す
ると、合成樹脂および顔料が加熱収縮して、顔料５１と
合成樹脂５２間の界面の空間が増大し、その際の空間に
よる孔６・・・ができる。しかも番孔６・・・の相当数
において、隣接する孔６・・・同士が連通している。従
って潤滑剤の含浸容量が極めて大きくなる。(Baking is performed at a temperature of about 31,180 to 300°C to make it porous. In other words, when the resin mixed with the pigment is heated, the synthetic resin and the pigment shrink due to heating, and the interface between the pigment 51 and the synthetic resin 52 The space increases, and holes 6 are formed due to the space.Moreover, in a considerable number of the holes 6, adjacent holes 6 communicate with each other.Therefore, the impregnation capacity of the lubricant increases. becomes extremely large.
（４）熱処理された非磁性層の表面をポリッシュし、表
面を平’１％化する。このとき、熱処理工程で多孔質に
なった非磁性層の表面が研摩されて、表面の孔が開口す
る。(4) The surface of the heat-treated nonmagnetic layer is polished to make the surface 1% flat. At this time, the surface of the nonmagnetic layer, which has become porous during the heat treatment process, is polished to open pores on the surface.
（５）研摩後クリーニングして、研摩で発生した塵埃を
除去する。(5) Clean after polishing to remove dust generated during polishing.
（６）酸化鉄などの磁性体粉を混入した合成樹脂塗料を
スピンコードする。供のとき、磁性塗料に例えばパラフ
ィンなどの熱昇華性物質を添加し、加熱したり、水酸化
マグネシウムなどのような水溶性添加剤を添加して、磁
性膜の表面仕上げ時に水をかけながら加工するなどの手
法で、積極的にピンホール３を形成するのが良い。なお
このピンホールは、磁気記録されるデータの１ビットの
寸法より充分小さいことはいうまでもない。(6) Spin-coding synthetic resin paint mixed with magnetic powder such as iron oxide. When preparing the magnetic coating, a heat sublimable substance such as paraffin is added to the magnetic coating and heated, or a water-soluble additive such as magnesium hydroxide is added to the magnetic coating and the surface is finished by spraying water on the magnetic coating. It is better to actively form the pinhole 3 by a method such as It goes without saying that this pinhole is sufficiently smaller than the size of 1 bit of magnetically recorded data.
（７）磁性塗膜の表面をポリッシュして平滑に仕上げ、
洗浄した後、潤滑剤を塗布する。(7) Polish the surface of the magnetic coating to make it smooth,
After cleaning, apply lubricant.
第４図は顔料の添加特性を示す図で、顔料の濃度が高く
なるほど孔６・・・が増加し、実線で示すよ ・うに潤
滑剤の含浸能力が向上するが、破線で示すように逆に非
磁性層５の樹脂膜の強度が低下する。Figure 4 shows the characteristics of pigment addition.As the concentration of pigment increases, the number of pores 6 increases, and the impregnating ability of the lubricant improves as shown by the solid line, but it reverses as shown by the broken line. The strength of the resin film of the nonmagnetic layer 5 decreases.
従って強度と潤滑剤含浸能力の両者を勘案し、重量にし
て４０〜６０％程度の顔料を混入するのがよい。Therefore, considering both strength and lubricant impregnation ability, it is preferable to mix pigment in an amount of about 40 to 60% by weight.
以上のように本発明によれば、アルミニウムなどの非磁
性体基板に、非磁性の顔料を混入した合成樹脂をスピン
コ−１〜したりすることで、多孔質の非磁性層を設け、
その上にビンポールなどの欠陥を有する磁性塗膜を形成
している。そのため、該ピンホールおよび多孔質非磁性
層の孔中に潤滑剤を含浸すると、非磁性層の無数の孔に
より大量の潤ｍ剤が含浸され、長期にわたって円滑かつ
安定して潤滑剤を磁気記録媒体表面に供給することが可
能となる。その結果、磁気記録媒体表面と磁気ヘッドと
の間の潤滑が常に確保され、磁気記録媒体および磁気へ
ノドの耐久性が飛躍的に向上する。As described above, according to the present invention, a porous non-magnetic layer is provided by spin coating a synthetic resin mixed with a non-magnetic pigment on a non-magnetic substrate such as aluminum.
On top of that, a magnetic coating film with defects such as vinyl poles is formed. Therefore, when a lubricant is impregnated into the pinholes and the pores of the porous non-magnetic layer, a large amount of lubricant is impregnated by the countless pores of the non-magnetic layer, and the lubricant is used for smooth and stable magnetic recording over a long period of time. It becomes possible to supply the liquid to the surface of the medium. As a result, lubrication between the surface of the magnetic recording medium and the magnetic head is always ensured, and the durability of the magnetic recording medium and magnetic head is dramatically improved.
第１図は従来の磁気記録媒体の断面図、第２図は本発明
による磁気記録媒体の実施例を示す断面図、第３図は本
発明による磁気記録媒体の製造方法を工程順に示す図、
第４図は非磁性層への顔料添加特性を示す図である。
図において、■はアルミニウム基板、２は磁性塗膜、３
はピンホール、４は潤滑剤、５は多孔質の非磁性ＩＨ１
６・・・は孔をそれぞれ示す。
特許出願人 富士通株式会社
代理人 弁理士 青 柳 稔
第１図
第３図
第２図
第４図
顔料」町％）FIG. 1 is a cross-sectional view of a conventional magnetic recording medium, FIG. 2 is a cross-sectional view showing an embodiment of the magnetic recording medium according to the present invention, and FIG. 3 is a diagram showing the manufacturing method of the magnetic recording medium according to the present invention in order of steps.
FIG. 4 is a diagram showing the characteristics of pigment addition to the nonmagnetic layer. In the figure, ■ is an aluminum substrate, 2 is a magnetic coating film, and 3 is a magnetic coating film.
is a pinhole, 4 is a lubricant, and 5 is a porous non-magnetic IH1
6 indicates holes, respectively. Patent applicant: Fujitsu Ltd. Agent: Minoru Aoyagi (Figure 1, Figure 3, Figure 2, Figure 4)
Claims (1)
上にピンホールなどの微細孔を有する磁性塗膜を形成し
、該微細孔および多孔質非磁性層の孔中に潤滑剤を含浸
したことを特徴とする磁気記録媒体。 （２）前記微細孔は、情報記録のための最小磁化反転間
隔よりも小さいことを特徴とする特許請求の範囲第（１
）項記載の磁気記録媒体。[Claims] (11) A porous nonmagnetic layer is provided on a nonmagnetic substrate, a magnetic coating film having micropores such as pinholes is formed thereon, and the micropores and the porous nonmagnetic layer are A magnetic recording medium characterized in that the pores are impregnated with a lubricant. (2) The fine pores are smaller than the minimum magnetization reversal interval for information recording.
) The magnetic recording medium described in item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58111598A JPS605419A (en) | 1983-06-20 | 1983-06-20 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58111598A JPS605419A (en) | 1983-06-20 | 1983-06-20 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS605419A true JPS605419A (en) | 1985-01-12 |
Family
ID=14565410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58111598A Pending JPS605419A (en) | 1983-06-20 | 1983-06-20 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS605419A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6173237A (en) * | 1984-09-18 | 1986-04-15 | Hitachi Maxell Ltd | Magnetic disk |
| JPH01182920A (en) * | 1988-01-13 | 1989-07-20 | Hitachi Ltd | magnetic recording medium |
-
1983
- 1983-06-20 JP JP58111598A patent/JPS605419A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6173237A (en) * | 1984-09-18 | 1986-04-15 | Hitachi Maxell Ltd | Magnetic disk |
| JPH0572650B2 (en) * | 1984-09-18 | 1993-10-12 | Hitachi Maxell | |
| JPH01182920A (en) * | 1988-01-13 | 1989-07-20 | Hitachi Ltd | magnetic recording medium |
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