JPS59119539A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPS59119539A JPS59119539A JP22685382A JP22685382A JPS59119539A JP S59119539 A JPS59119539 A JP S59119539A JP 22685382 A JP22685382 A JP 22685382A JP 22685382 A JP22685382 A JP 22685382A JP S59119539 A JPS59119539 A JP S59119539A
- Authority
- JP
- Japan
- Prior art keywords
- filler
- layer
- magnetic
- recording medium
- height
- 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
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は磁気ディスク等の磁気記録媒体の製造方法に係
り、特に磁性層からのフィラー突出高さを制御すること
が考慮された磁気記録媒体の製造方法に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method of manufacturing a magnetic recording medium such as a magnetic disk, and in particular to a method of manufacturing a magnetic recording medium in which control of the height of filler protrusion from a magnetic layer is taken into consideration. Regarding the manufacturing method.
第1図には一般的な磁気記録媒体である磁気ディスクの
断面が示されており、アルミニウム、マグネシウム等の
材料で構成される基板10の表面にアルミナ、ジルコニ
ア等の耐磨耗用フィラーを混入した磁性体層12が形成
されている。Fig. 1 shows a cross section of a magnetic disk, which is a general magnetic recording medium, and shows a substrate 10 made of materials such as aluminum and magnesium, and a wear-resistant filler such as alumina and zirconia mixed into the surface of the substrate 10. A magnetic layer 12 is formed.
第2図(ハ)〜e)は一般的な磁性体層の製造手順を示
している。第2図ビ)は十分に表面が平滑仕上げされた
基板10へ、磁性粉末を熱硬化性樹脂に混合した磁性体
14とフィラー16を十分混合したものを塗布した状態
である。FIGS. 2(c) to 2(c) to e) show a general manufacturing procedure for a magnetic layer. FIG. 2B) shows a state in which a sufficiently mixed mixture of a magnetic material 14, which is a mixture of magnetic powder and a thermosetting resin, and a filler 16 is applied to a substrate 10 whose surface has been sufficiently smoothed.
第2図(ロ)に示されるごとく磁性体14及びフィラー
16の表面はダイヤモンドテープ等を用いて所定の厚さ
tlに削り仕上げされた状態であり、磁性体14は所定
の厚さt、に仕上っている。フィラー16は耐磨耗性を
目的としているため大きな硬さを有しており、磁性粉末
と熱硬化性樹脂とから成る磁性体14との間には硬さの
点で大きな相違がある。これに伴って切削性についても
同様に大きな開きがあり、フィラー16は磁性体14に
比べて長さり、だけ突出することになる。As shown in FIG. 2(b), the surfaces of the magnetic material 14 and the filler 16 have been polished to a predetermined thickness tl using a diamond tape or the like, and the magnetic material 14 has been polished to a predetermined thickness t. It's finished. Since the filler 16 is intended for wear resistance, it has a large hardness, and there is a large difference in hardness between the magnetic powder and the magnetic body 14 made of a thermosetting resin. Along with this, there is also a large difference in machinability, and the filler 16 is longer and protrudes compared to the magnetic body 14.
このようなフィラー16の突出長さは、磁気ヘッドと記
録媒体との間のすき間(浮上スベーシ4ングと称される
)よりも小さくする必要がありこの浮上スペーシングは
磁気記録の高密度化に伴ってます才す減少されており(
最近では0.25〜0,3μmのものもある)、フィラ
ー16の突出高さもこれに応じて小さくする必要がある
。しかしながらフィラー16と磁性体14とを同時加工
すること屹よってフィラー16の突出量L1を浮上スペ
ーシング以下にするような加工は困難であるため、別工
程においてフィラー突出量を制御してい°る。The protruding length of the filler 16 needs to be smaller than the gap between the magnetic head and the recording medium (referred to as floating spacing), and this floating spacing is required to increase the density of magnetic recording. It has been reduced (
(Recently, some have a diameter of 0.25 to 0.3 μm), and the protrusion height of the filler 16 must be reduced accordingly. However, since it is difficult to process the filler 16 and the magnetic material 14 simultaneously so that the protrusion amount L1 of the filler 16 is less than the floating spacing, the filler protrusion amount is controlled in a separate process.
第2図ヒ→は低浮上表面加工用特殊ヘッド(バニッシュ
ヘッドと称される)を用いてフィラー16の突出量り、
を△Lだけ削り、浮上スペーシングよりもフィラー突出
量L!を小さくするように加工した状態である。In Fig. 2, the amount of protrusion of the filler 16 is measured using a special head for processing low-flying surfaces (referred to as a vanish head).
By △L, the amount of filler protrusion is greater than the floating spacing! It has been processed to make it smaller.
このようなフィラーの表面加工はフィラーが大きな硬さ
を有するためバニッシュヘッドを用いた場合にも、長時
間の作業となり、加工量の制御も著しく困難である。ま
たバニッシュヘッドを用いた加工であっても、バニッシ
ュヘッドは磁性体14に対して浮上している必要があり
、フィラー突出量り、を小さくすることは、ノ(ニッシ
ュヘッドの破損可能性があり、フィラー突出量を納得の
いく状態まで制御することは困難である。Since the filler has a large hardness, such surface processing of the filler requires a long time even when a burnish head is used, and it is extremely difficult to control the amount of processing. Furthermore, even in processing using a burnish head, the burnish head must be floating relative to the magnetic body 14, and reducing the amount of filler protrusion may cause damage to the burnish head. It is difficult to control the filler protrusion amount to a satisfactory level.
本発明は上記事実を考慮し、磁性体層からのフィラーの
突出量を容易に制御することができる磁気記録媒体の製
造方法を提供することが目的である。The present invention takes the above-mentioned facts into account, and an object of the present invention is to provide a method for manufacturing a magnetic recording medium that can easily control the amount of filler protruding from a magnetic layer.
本発明に係る磁気記録媒体の製造方法では、基板表面へ
フィラーを含有した第1屑を形成し、この第1層の表面
を所定厚さに削ってフィラーをその表面から突出させ(
例えば0.6〜1.0μm)、第1層の表面に磁性の第
2層を形成しこの第2層はフィラーの表面を基準にフィ
ラー表面と同一高さ又はフィラー表面よりも若干低い高
さに削ってフィラー突出量を制御すると共に磁性層の厚
さも所定値に制御するようになっている。In the method for manufacturing a magnetic recording medium according to the present invention, a first scrap containing a filler is formed on the surface of a substrate, and the surface of this first layer is shaved to a predetermined thickness so that the filler protrudes from the surface (
For example, 0.6 to 1.0 μm), a magnetic second layer is formed on the surface of the first layer, and this second layer is at the same height as the filler surface or slightly lower than the filler surface. The amount of protrusion of the filler is controlled by grinding, and the thickness of the magnetic layer is also controlled to a predetermined value.
第3図(イ)〜に)には本実施例に係る製造方法の手順
が示されている。FIGS. 3A to 3) show the steps of the manufacturing method according to this embodiment.
第3図げ)では、従来例と同様にアルミニウム等の材質
から製作される基板10の表面が円滑に仕上げられてお
り、この表面へアルミナ等のフィラー16と熱硬化性樹
脂等から成る接着剤20の混合液を適当な厚さt倉で塗
布し、非磁性層を形成した状態が示されている。In Fig. 3), the surface of the substrate 10 made of a material such as aluminum is smoothly finished as in the conventional example, and a filler 16 such as alumina and an adhesive made of a thermosetting resin or the like are applied to this surface. A nonmagnetic layer is shown in which a mixture of No. 20 and No. 20 is applied to an appropriate thickness.
この場合の非磁性層の厚さt!は仕上げ加工厚in、フ
ィラー16の大きさ、量及びその後の加工条件等によっ
て決定される。The thickness of the nonmagnetic layer in this case is t! is determined by the finishing thickness in, the size and amount of the filler 16, and subsequent processing conditions.
第3図(ロ)は第3図げ)の非磁性層の表面を削って非
磁性層の厚さを制御した状態であり、この削り加工はダ
イヤモンドテープ等で行われる。FIG. 3(B) shows a state in which the thickness of the nonmagnetic layer is controlled by scraping the surface of the nonmagnetic layer in FIG.
この加工によりフィラー16も同時に削られるか、フィ
ラー16と接着剤20との硬さの相違により、段差り、
が生じてフィラー16が接着剤20よりも突出する。こ
の段差り、は磁性体の塗膜厚を仕様値に加工する際の基
準となるので、所定の寸法に精度良く仕上げる必要があ
る。Due to this process, the filler 16 may also be removed at the same time, or due to the difference in hardness between the filler 16 and the adhesive 20, the difference in level,
occurs, and the filler 16 protrudes beyond the adhesive 20. This difference in level serves as a reference when processing the coating thickness of the magnetic material to the specification value, so it is necessary to finish it to a predetermined dimension with high precision.
第6図ヒ→では第3図(ロ)で加工された非磁性層の表
面に熱硬化性樹脂を混合した磁性体14を塗布した状態
が示されている。FIG. 6A shows a state in which a magnetic material 14 mixed with a thermosetting resin is coated on the surface of the nonmagnetic layer processed in FIG. 3B.
第3図に)では第3図(/1の磁性体14の表面を削り
加工し、フィラー16の突出量L4を高精度に加工した
状態が示されている。すなわち磁性体14の高さはすで
に加工されているフィラー16の表面を基準にして行わ
れるので、フィラー16の突出高さ及び磁性体14の高
さは高精度とすることができる。Figure 3) shows a state in which the surface of the magnetic body 14 of Figure 3 (/1) has been ground and the protrusion amount L4 of the filler 16 has been machined with high precision.In other words, the height of the magnetic body 14 is Since the process is performed based on the surface of the filler 16 that has already been processed, the protrusion height of the filler 16 and the height of the magnetic body 14 can be set with high precision.
第4図では本実施例によって加工されるフィラー16の
形状変化を示している0
すなわち第4図印は第6図印に相当し、接着剤20でフ
ィラー16が基板10へ取りつけられた状態である。4 shows the shape change of the filler 16 processed according to this embodiment. In other words, the marks in FIG. 4 correspond to the marks in FIG. 6, and the filler 16 is attached to the substrate 10 with the adhesive 20. be.
第4図(ロ)は第5図(嗜に相当し、表面仕上げ加工に
よって接着剤20の表面と段差り、が生じ、このフィラ
ー16の突出部エツジはR形状となって所定の曲率状態
を呈している。FIG. 4(b) corresponds to FIG. 5(b).Due to the surface finishing process, a step is created on the surface of the adhesive 20, and the protruding edge of the filler 16 has an R shape to maintain a predetermined curvature state. It is showing.
第4図ヒ→は第3図に)に相当し、磁性体14が塗布さ
れた後に表面仕上げ加工が行われた状態であり、フィラ
ー16は磁性体14の表面から突出するか又は磁性体1
4の表面と同一高さとなる。この場合フィラー16の表
面が磁性体14より突出していても、フィラー16のエ
ツジが磁性体14の表面と生ずる角度θは従来構造の一
層ディスクに比べて極めて大きくなる。これによってデ
ィスク表面と図示しない磁気ヘッドとの接触時におけ・
る磁気ヘッドへの損傷が著しく軽減される。Fig. 4 H corresponds to Fig. 3), and is in a state where the surface finishing process has been performed after the magnetic material 14 has been applied, and the filler 16 protrudes from the surface of the magnetic material 14 or
It will be at the same height as the surface of 4. In this case, even if the surface of the filler 16 protrudes from the magnetic body 14, the angle θ formed between the edge of the filler 16 and the surface of the magnetic body 14 is extremely large compared to a conventional single-layer disk. As a result, when the disk surface comes into contact with a magnetic head (not shown),
Damage to the magnetic head is significantly reduced.
本実施例は上記製作手順によるため、磁性体14の厚さ
に関係なくフィラー16の大きさ、量を選択することが
でき、またフィラー16の突出量についても凹から凸ま
で任意に精度よく加工することができる。Since this embodiment follows the above manufacturing procedure, the size and amount of the filler 16 can be selected regardless of the thickness of the magnetic body 14, and the amount of protrusion of the filler 16 can be arbitrarily processed with high precision from concave to convex. can do.
従来の磁気ディスクでは、−例として磁性体14の厚さ
が1μm以下、フィラー16へ突出量が025μm以下
、浮上スペーシングの最低量が0.6μm等は従来技術
の一層ディスクでは略限界に近いが、本実施例による二
層ディスクでは更に高精度を期待することができる。In conventional magnetic disks, for example, the thickness of the magnetic body 14 is 1 μm or less, the amount of protrusion into the filler 16 is 0.25 μm or less, the minimum amount of floating spacing is 0.6 μm, etc., which are almost the limits for conventional single-layer disks. However, even higher precision can be expected with the dual-layer disc according to this embodiment.
以上説明したごとく本発明に係る磁気記録媒体の製造方
法では、フィラーを含有した第1層を形成して表面を所
定厚さにす削りフィラーを突出させ、第1層の表面へ第
2Mを形成して表面を削りフィラーを露出させるので、
フィラー突出量及び磁性体高さを高精度に仕上げること
ができる優れた効果を有する。As explained above, in the method for manufacturing a magnetic recording medium according to the present invention, a first layer containing a filler is formed, the surface is ground to a predetermined thickness, the filler is made to protrude, and a second M is formed on the surface of the first layer. The surface is scraped to expose the filler, so
It has the excellent effect of making it possible to finish the filler protrusion amount and magnetic body height with high precision.
第1図は従来の磁気ディスクを示す断面図、第2図ビ)
〜Piは従来の磁気ディスクの製造方法を示す断面図、
第3図ビ)〜に)は本発明の実施例による製造手順を示
す断面図、第4図(揃〜e1は本発明の実施例によるフ
ィラーの形状変化を示す断面図である。
10・・・基板、12・・磁性体層、
14・・・磁性体、 16・・フィラー、2
0・接着剤。
才l凹
2
才4121
=215
才3凹Figure 1 is a cross-sectional view showing a conventional magnetic disk, Figure 2 (b)
~Pi is a cross-sectional view showing a conventional magnetic disk manufacturing method,
Figures 3-3) are cross-sectional views showing the manufacturing procedure according to the embodiments of the present invention, and Figures 4-1 are cross-sectional views showing changes in the shape of the filler according to the embodiments of the present invention. -Substrate, 12...Magnetic layer, 14...Magnetic material, 16...Filler, 2
0.Adhesive. sai l concave 2 sai 4121 = 215 sai 3 concave
Claims (1)
感じ、この第1層の表面を所定厚さに削って前記フィラ
ーを突出させ、この第1層の表面へ磁性の第2層を形成
した後にこの第2層の表面を削って第2層表面から前記
フィラーを露出させることを特徴とした磁気記録媒体の
製造方法。A first layer containing a filler such as alumina is shaped onto the surface of the substrate, the surface of this first layer is shaved to a predetermined thickness to make the filler protrude, and a second magnetic layer is applied to the surface of the first layer. A method for producing a magnetic recording medium, comprising: forming the filler, and then scraping the surface of the second layer to expose the filler from the surface of the second layer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22685382A JPS59119539A (en) | 1982-12-27 | 1982-12-27 | Production of magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22685382A JPS59119539A (en) | 1982-12-27 | 1982-12-27 | Production of magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59119539A true JPS59119539A (en) | 1984-07-10 |
Family
ID=16851586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22685382A Pending JPS59119539A (en) | 1982-12-27 | 1982-12-27 | Production of magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59119539A (en) |
-
1982
- 1982-12-27 JP JP22685382A patent/JPS59119539A/en active Pending
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