JPH02101618A - Magnetic disk - Google Patents
Magnetic diskInfo
- Publication number
- JPH02101618A JPH02101618A JP25512188A JP25512188A JPH02101618A JP H02101618 A JPH02101618 A JP H02101618A JP 25512188 A JP25512188 A JP 25512188A JP 25512188 A JP25512188 A JP 25512188A JP H02101618 A JPH02101618 A JP H02101618A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- disk
- durability
- texture
- disposing
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 16
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 239000010409 thin film Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 abstract description 6
- 229910020630 Co Ni Inorganic materials 0.000 abstract description 3
- 229910002440 Co–Ni Inorganic materials 0.000 abstract description 3
- 238000005498 polishing Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000010408 film Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910018104 Ni-P Inorganic materials 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 229910018536 Ni—P Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910018523 Al—S Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910020517 Co—Ti Inorganic materials 0.000 description 1
- 229910020516 Co—V Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007737 ion beam deposition Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- FPVKHBSQESCIEP-JQCXWYLXSA-N pentostatin Chemical compound C1[C@H](O)[C@@H](CO)O[C@H]1N1C(N=CNC[C@H]2O)=C2N=C1 FPVKHBSQESCIEP-JQCXWYLXSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は高密度磁気記録に適する強磁性金属薄膜を磁気
記録層とする磁気ディスクに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic disk whose magnetic recording layer is a ferromagnetic metal thin film suitable for high-density magnetic recording.
従来の技術
高密度記録を行うために、ポリエチレンテレフタレート
フィルム上にスパッタリング法でγ−Ｆθ２０３薄膜を
配したものや、Ｃｏ−Ｃｒ薄膜を配したものや、アルミ
合金基板上にＣｏ −Ｎｉ −Ｐメツキ膜。Conventional technology In order to perform high-density recording, a γ-Fθ203 thin film is deposited by sputtering on a polyethylene terephthalate film, a Co-Cr thin film is deposited, and a Co-Ni-P plating is deposited on an aluminum alloy substrate. film.
Ｃｏ −Ｎｉスパッタ膜を配した磁気ディスクの開発が
盛んで、一部は実用になっている（ ＩＥＥＥＴＲＡＮ
ＳＡＣＴｌ、’ＯＮＳ ＯＮ ＭＡＧＮＥＴＩＣＳ ｖ
ｏｌ。The development of magnetic disks with Co-Ni sputtered films is active, and some of them are in practical use (IEEETRAN
SACTl,'ONS ON MAGNETICS v
ol.
脚−２３（１９８７）２ｅ７４〕。Leg-23 (1987) 2e74].
かかる媒体の実用耐久性を確保するには、Ｓｉｎ。To ensure the practical durability of such media, Sin.
Ｓ ｉ０２ 、カーボン等の保護膜に各種の潤滑剤を配
する方法が多く採用されているが、よシ高密度化を進め
ていく上では、スペーシング損失となって目立ってくる
ことから、円周状に幅数ミクロン。Many methods have been adopted in which various lubricants are applied to a protective film such as S i02 or carbon, but as the density increases, the spacing loss becomes noticeable, so it is difficult to Circumferentially several microns wide.
最大粗さ１００〜１０００人の７字状の溝から成るいわ
ゆるテクスチャーを形成する方法での改善が行われてい
る〔日本応用磁気学会、第６６回研究資料、５６−８（
１９８８，７））。Improvements have been made by forming a so-called texture consisting of 7-shaped grooves with a maximum roughness of 100 to 1000 [Japan Society of Applied Magnetics, 66th Research Materials, 56-8 (
1988, 7)).
発明が解決しようとする課題
しかしながら、上記した構成では、Ｓ／Ｎの改善度合が
十分でないといった課題があシ、改善が望まれていた。Problems to be Solved by the Invention However, the above configuration has a problem in that the degree of improvement in S/N is not sufficient, and an improvement has been desired.
本発明は上記した事情に濫みなされたもので、耐久性を
確保した上でＳ／Ｎを改善した磁気ディスクを提供する
ものである。The present invention has been made in consideration of the above-mentioned circumstances, and is intended to provide a magnetic disk with improved S/N while ensuring durability.
課題を解決するための手段
上記した課題を解決するため本発明の磁気ディスクは、
周方向に沿って蛇行したテクスチャーを配した上に強磁
性金属薄膜を配するようにしたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the magnetic disk of the present invention has the following features:
A ferromagnetic metal thin film is placed on top of a meandering texture along the circumferential direction.
作 用
本発明の磁気ディスクは上記した構成により、単一な従
来のテクスチャーに比べて、蛇行していることで摩擦係
数を下げる作用があるのでテクスチャーを浅く構成でき
るのと、蛇行してでも異方性は円周方向へテクスチャー
による誘導されるものと大差ないのでＳ／Ｎも改善でき
ることになる。Function: Due to the above-described structure, the magnetic disk of the present invention has a meandering structure that lowers the coefficient of friction compared to a single conventional texture, so the texture can be made shallower, and even when the texture is meandering, there is no difference. Since the orientation is not much different from that induced by texture in the circumferential direction, the S/N can also be improved.
実施例
以下１図面を参照しながら本発明に係る一実施例につい
て説明する。第１図は本発明に係る一実施例の磁気ディ
スクの拡大断面図である。第１図で１はＡｔ −Ｍｇ
、 Ａｌ −Ｓ ｉ 合金等の非磁性金属基板で研磨仕
上げした上に更にメツキを施したものを用いてもよい。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to one drawing. FIG. 1 is an enlarged sectional view of a magnetic disk according to an embodiment of the present invention. In Figure 1, 1 is At-Mg
, a non-magnetic metal substrate such as an Al-S i alloy, polished and then plated may be used.
尚この基板は後述するテクスチャー構成を配したもので
ある。２はＣｏ −Ｎｉ 。Note that this substrate is provided with a texture configuration to be described later. 2 is Co-Ni.
Ｃｏ −Ｃｒ 、 Ｃｏ−Ｔｉ 、 Ｃｏ −Ｔａ 、
Ｃｏ −Ｍｏ 、 Ｃ。Co-Cr, Co-Ti, Co-Ta,
Co-Mo, C.
−Ｗ 、 Ｃｏ −Ｖ 、 Ｃｏ −Ｎｉ −Ｐ 、
Ｃｏ−Ｎｉ−Ｃｒ。-W, Co-V, Co-Ni-P,
Co-Ni-Cr.
Ｃｏ −Ｎｉ −０、Ｃｏ −Ｃｒ −Ｎｂ等の強磁性
金属薄膜で、スパッタリング法、イオンビームデポジシ
ョン法、電子ビーム蒸着法等によ多形成する１、３は保
護潤滑層で、プラズマ重合膜、Ｓ２Ｏ２膜、カーボン膜
、含フツ素有機化合物、脂肪酸、脂肪酸の金属塩等から
適宜選択する。第２図はディスク上面図で、ディスク上
面４には、円周方向に沿って蛇行したテクスチャー５を
配しである。研磨テープを回転と同時に半径方向に往復
運動を行うことで形成する溝により構成したもので、幅
数ミクロン、最大粗さ１５０人までの７字状の溝で１周
する間に蛇行を少くとも５インチディスクでは５０回〜
２００回の範囲でくシ返し、これを目安にディスクサイ
ズで比例配分してやればよい。蛇行の振幅は半径方向に
６０〜２００μ−が好ましい。Ferromagnetic metal thin films such as Co-Ni-0, Co-Cr-Nb, etc. are formed by sputtering, ion beam deposition, electron beam evaporation, etc. 1 and 3 are protective lubricating layers, which are plasma polymerized films. , an S2O2 film, a carbon film, a fluorine-containing organic compound, a fatty acid, a metal salt of a fatty acid, and the like. FIG. 2 is a top view of the disk, and the top surface 4 of the disk is provided with a meandering texture 5 along the circumferential direction. It consists of grooves formed by reciprocating the abrasive tape in the radial direction at the same time as it rotates, and has a seven-figure groove with a width of several microns and a maximum roughness of up to 150. 50 times for 5 inch disc
You can repeat the process within a range of 200 times and use this as a guideline to allocate it proportionally according to the disk size. The amplitude of meandering is preferably 60 to 200 μ- in the radial direction.
以下、更に具体的に本発明の実施例について比較例との
対比で説明する。Examples of the present invention will now be described in more detail in comparison with comparative examples.
厚み６師で表面研磨したＡ７− Ｍｇ合金基板を平均粗
さ４０人、最大粗さ８０人とした後、スパッタリング法
によりボロンを２０ｏＯ人配した上で、研磨テープを半
径方向に往復させながら、ディスクを回転し、深さ８０
人１幅４ミクロンの溝を振＠６０μｍで、蛇行回数を１
２０回としたテクスチャーを構成し、その上にＣｏ −
Ｎｉ −Ｃｒ （Ｃｏ ： Ｎｉ：Ｃｒ＝７９：１６：
５ｗｔ％）をスパッタリンクして１２ｏＯ人配し、その
上にフェニルトリメキシシランのプラズマ重合膜を１０
０人配した６インチディスクを試作した。一方比較例は
、深さ１６０Ａ、、Ｉｌｌ！８ミクロンの従来のテクス
チャーを配した以外は実施例と同じ構成にした。After polishing the surface of the A7-Mg alloy substrate with a thickness of 6 mm to an average roughness of 40 mm and a maximum roughness of 80 mm, 20 oO of boron was deposited by sputtering, and while the polishing tape was reciprocated in the radial direction, Rotate the disk to a depth of 80
Shake a groove with a width of 4 microns per person @ 60 μm, and reduce the number of meandering times to 1.
Construct a texture that has been applied 20 times, and coat it with Co −
Ni-Cr (Co: Ni:Cr=79:16:
5wt%) was sputter-linked and 12oO
We prototyped a 6-inch disc with 0 seats. On the other hand, the comparative example has a depth of 160A, Ill! The structure was the same as in the example except that a conventional texture of 8 microns was provided.
両者のディスクをウィンチエスタ−型の浮上スペーシン
グ０．１４μｍのＮｉ −Ｚｎフェライトヘッドを用い
、コンタクトスタート、ストッフヲ＜ｂ返し友。Ｓ／Ｎ
はトラック幅２０μｍ、ビット長０．４μｍで実施例が
１．３（ｄＢ）良好で、摩擦係数は初期実施例が０．３
１ 、比較例が０．３３で殆んど同じであったが、６０
００パスで実施例が０．３２゜比較例が０．４２ 、９
５００パスで実施例が０．３３゜比較例が０．５６と耐
久性で差がみられた。Both disks were contact-started using a wintier type Ni-Zn ferrite head with a flying spacing of 0.14 μm. S/N
With a track width of 20 μm and a bit length of 0.4 μm, the example was 1.3 (dB) better, and the friction coefficient was 0.3 for the initial example.
1, the comparative example was almost the same at 0.33, but 60
In the 00 pass, the example was 0.32° and the comparative example was 0.42, 9
After 500 passes, the example was 0.33° and the comparative example was 0.56, indicating a difference in durability.
発明の効果
以上のように本発明によれば、Ｓ／Ｎと耐久性について
共に満足できる磁気ディスクが得られるといったすぐれ
た効果がある。Effects of the Invention As described above, the present invention has the excellent effect of providing a magnetic disk that can satisfy both S/N and durability.
第１図は本発明に係る一実施例の磁気ディスクの拡大断
面図、第２図は同実施例の磁気ディスクの上面図である
。
１・・・・・・基板、２・・・・・・強磁性金属薄膜、
５・・・・・・蛇行したテクスチャーFIG. 1 is an enlarged sectional view of a magnetic disk according to an embodiment of the present invention, and FIG. 2 is a top view of the magnetic disk of the same embodiment. 1...Substrate, 2...Ferromagnetic metal thin film,
5...Meandering texture
Claims (1)
性金属薄膜を配したことを特徴とする磁気ディスク。A magnetic disk characterized by having a ferromagnetic metal thin film arranged on top of which a meandering texture is arranged along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25512188A JPH02101618A (en) | 1988-10-11 | 1988-10-11 | Magnetic disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25512188A JPH02101618A (en) | 1988-10-11 | 1988-10-11 | Magnetic disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02101618A true JPH02101618A (en) | 1990-04-13 |
Family
ID=17274383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25512188A Pending JPH02101618A (en) | 1988-10-11 | 1988-10-11 | Magnetic disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02101618A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02199617A (en) * | 1989-01-28 | 1990-08-08 | Speedfam Co Ltd | Substrate for magnetic recording and method and device for texture thereof |
| JPH04339312A (en) * | 1991-05-16 | 1992-11-26 | Matsushita Electric Ind Co Ltd | Magnetic disk |
-
1988
- 1988-10-11 JP JP25512188A patent/JPH02101618A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02199617A (en) * | 1989-01-28 | 1990-08-08 | Speedfam Co Ltd | Substrate for magnetic recording and method and device for texture thereof |
| JPH04339312A (en) * | 1991-05-16 | 1992-11-26 | Matsushita Electric Ind Co Ltd | Magnetic disk |
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