JPH0227729B2 - - Google Patents
Info
- Publication number
- JPH0227729B2 JPH0227729B2 JP57007498A JP749882A JPH0227729B2 JP H0227729 B2 JPH0227729 B2 JP H0227729B2 JP 57007498 A JP57007498 A JP 57007498A JP 749882 A JP749882 A JP 749882A JP H0227729 B2 JPH0227729 B2 JP H0227729B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- thin film
- ferromagnetic thin
- magnetic recording
- spiral
- 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 - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 28
- 230000005294 ferromagnetic effect Effects 0.000 claims description 13
- 239000010409 thin film Substances 0.000 claims description 13
- 239000000696 magnetic material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 15
- 239000010408 film Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910018131 Al-Mn Inorganic materials 0.000 description 1
- 229910018461 Al—Mn Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- -1 Co-Mo Alloy Inorganic materials 0.000 description 1
- 229910020516 Co—V Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 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
- 238000012827 research and development Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002904 solvent 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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】
本発明は垂直磁化式の磁気記録円板又はドラム
の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a perpendicularly magnetized magnetic recording disk or drum.
垂直磁化式の記録方式は、記録磁界が磁性膜に
直角な方向に印加される方式であるから、磁気記
録密度は高くなり、また、磁化方向に十分な量の
磁性膜を存在させれば記録磁化も十分に大きくで
きる。 In the perpendicular magnetization recording method, the recording magnetic field is applied in the direction perpendicular to the magnetic film, so the magnetic recording density is high. Magnetization can also be made sufficiently large.
しかしながら、このような垂直磁化方式に適す
る磁気記録体の研究開発が数年前から活発になさ
れているにも拘らず、未だ満足すべき域に達して
いない。 However, although research and development of magnetic recording bodies suitable for such a perpendicular magnetization method has been actively conducted for several years, it has not yet reached a satisfactory level.
本願発明者は、先に特願昭55−22222号（特開
昭56−119934号）において垂直記録に適する磁気
記録体を提供したが、製造上並びに磁性膜の耐摩
耗の点で十分に満足すべきものでなかつた。 The inventor of the present application previously provided a magnetic recording medium suitable for perpendicular recording in Japanese Patent Application No. 55-22222 (Japanese Unexamined Patent Publication No. 56-119934), which was fully satisfactory in terms of manufacturing and wear resistance of the magnetic film. It wasn't something I should have done.
本発明はこれらの欠点を改良すべきなされたも
ので、その特徴は、円板又は円筒形の軟磁性支持
体の表面に、スパツタリング等の方法により均一
な厚さで強磁性膜を形成し、且つ該強磁性膜の面
上に渦巻状又は螺旋状の記録並びに再生用磁性針
のガイド用非磁性畝を形成してなる磁気記録体の
製造方法にある。 The present invention has been made to improve these drawbacks, and its characteristics are that a ferromagnetic film is formed with a uniform thickness on the surface of a disc or cylindrical soft magnetic support by a method such as sputtering, The present invention also provides a method for manufacturing a magnetic recording medium, which comprises forming spiral or spiral nonmagnetic ridges for guiding magnetic recording and reproducing needles on the surface of the ferromagnetic film.
以下、本発明の一実施例を説明する。 An embodiment of the present invention will be described below.
なお、実施例はスパツタリング法により強磁性
薄膜を形成するが、その代わりに周知の蒸着法及
びめつき法を使用しても良い。結晶軸を垂直方向
に配列させる蒸着法は特開昭56−70618号、同56
−83838号、同56−94520号、同56−145527号、及
び同56−165933号等に、又めつき法は「金属表面
技術」第32巻第６号第303頁（1981）、及び金属表
面技術学会第63回講演要旨集第56頁（1981）等に
記載されている。 Although the ferromagnetic thin film is formed by sputtering in the embodiment, well-known vapor deposition and plating methods may be used instead. The vapor deposition method that aligns the crystal axes in the vertical direction is disclosed in Japanese Patent Application Laid-open No. 56-70618 and No. 56.
-83838, No. 56-94520, No. 56-145527, and No. 56-165933, etc., and the plating method is described in "Metal Surface Technology" Vol. 32, No. 6, p. 303 (1981), and It is described in the Abstracts of the 63rd Conference of the Surface Technology Society, page 56 (1981), etc.
第１図は本発明の磁気記録円板の模型的拡大断
面図を示す。図中１は軟鉄等から製作された軟磁
性体円板であり、該円板１の表面には強磁性体薄
膜２をスパツタリングにより均一な厚さ（0.1μ〜
数μ）で形成する。 FIG. 1 shows a schematic enlarged sectional view of the magnetic recording disk of the present invention. In the figure, reference numeral 1 indicates a soft magnetic disc made of soft iron or the like, and a ferromagnetic thin film 2 is sputtered on the surface of the disc 1 to a uniform thickness (0.1 μm to 0.1 μm).
Formed with several micrometers).
この薄膜２は、例えばCo−Cr合金、Co−Mo
合金、Co−Ｖ合金、Cu−Al−Mn合金、Co−Mo
−Ｖ合金等が好ましく、且つその結晶軸方向が膜
厚の方向にそろえられていることが望ましい。こ
れらの合金で結晶軸方向を膜厚方向とするスパツ
タリング技術は提案されている（特開昭54−
51804号、特願昭56−182252号、特願昭56−
194400号等）。３は非磁性体（硬質プラスチツク
ス、黄銅など）を渦巻状又は螺旋状の畝である。
この畝３の形成方法の一例としては、強磁性体薄
膜２の表面に均一な厚みで非磁性体層をまず形成
し、しかる後渦巻状の溝を強磁性薄膜に達する深
さにダイヤモンドカツタ−で切削し、残りの部分
を畝３とする。或いは非磁性金属の場合にはホト
マスク法及びエツチング法を応用して精度の高い
溝を非磁性体層に形成することにより作ることも
できる。又、プラスチツクを非磁性体として用い
る場合には一様な厚さのプラスチツク層を強磁性
薄膜上に形成し、次いで端面が平面でかつ渦巻状
の溝を有する加熱金型をプラスチツク層に押圧
し、プラスチツク層の溝底に残るプラスチツク薄
膜をダイヤモンドカツタ−で削り取る方法又、溶
剤により除去する方法を採用することができる。
このようにして得られた畝３は磁性針のガイドを
構成し溝（渦巻・螺旋状）内を磁性針がしゆう動
し、強磁性薄膜への磁界の印加が垂直に行なわれ
る。尚、円板１の裏面にも前述と同様の方法によ
り強磁性薄膜及びガイド用畝を形成することがで
きる。 This thin film 2 is made of, for example, Co-Cr alloy, Co-Mo
Alloy, Co-V alloy, Cu-Al-Mn alloy, Co-Mo
-V alloy or the like is preferable, and it is desirable that the crystal axis direction is aligned in the direction of the film thickness. A sputtering technique in which the crystal axis direction is the film thickness direction for these alloys has been proposed (Japanese Unexamined Patent Application Publication No. 1989-1999).
No. 51804, Patent Application No. 182252, Patent Application No. 1982-
194400 etc.). 3 is a spiral or spiral ridge made of a non-magnetic material (hard plastic, brass, etc.).
An example of a method for forming the ridges 3 is to first form a non-magnetic layer with a uniform thickness on the surface of the ferromagnetic thin film 2, and then cut a spiral groove with a diamond cutter to a depth that reaches the ferromagnetic thin film. The remaining part is used as ridge 3. Alternatively, in the case of a non-magnetic metal, it can be made by applying a photomask method and an etching method to form highly accurate grooves in the non-magnetic material layer. In addition, when plastic is used as a nonmagnetic material, a plastic layer of uniform thickness is formed on a ferromagnetic thin film, and then a heated mold having a flat end surface and a spiral groove is pressed onto the plastic layer. Alternatively, a method of scraping off the plastic thin film remaining at the bottom of the groove in the plastic layer with a diamond cutter or a method of removing it with a solvent can be adopted.
The ridges 3 thus obtained constitute a guide for the magnetic needle, and the magnetic needle slides within the groove (spiral/spiral), and a magnetic field is applied perpendicularly to the ferromagnetic thin film. Incidentally, a ferromagnetic thin film and guide ridges can also be formed on the back surface of the disk 1 by the same method as described above.
本発明の磁気記録体により磁気記録再生を行う
には、第２図のように磁気記録体を中心軸線４の
周りに回転させ、畝３により画成される渦巻溝５
に単極磁気ヘツド６を挿入する。ヘツド６はヨ−
ク７及びスライダ又はロ−ラ８及び軟磁性板１を
経て閉磁路を作るので強磁性薄膜への記録及び再
生が能率良く行える。 To perform magnetic recording and reproduction using the magnetic recording body of the present invention, the magnetic recording body is rotated around the central axis 4 as shown in FIG.
Insert the monopolar magnetic head 6 into. Head 6 is
Since a closed magnetic path is created through the disk 7, the slider or roller 8, and the soft magnetic plate 1, recording and reproducing to and from the ferromagnetic thin film can be performed efficiently.
第１図は本発明の磁気記録体の概念的な断面
図、及び第２図は本発明の磁気記録体の使用状態
を示す部分断面図である。図中主な部分は次の通
りである。
１：軟磁性体円板、２：スパツタリング強磁性
体薄膜、３：畝。
FIG. 1 is a conceptual cross-sectional view of the magnetic recording body of the present invention, and FIG. 2 is a partial cross-sectional view showing the state in which the magnetic recording body of the present invention is used. The main parts in the figure are as follows. 1: Soft magnetic disk, 2: Sputtered ferromagnetic thin film, 3: Ridge.
Claims (1)
性薄膜を均一な厚さに形成し、該強磁性薄膜の表
面に、渦巻状又はらせん状の非磁性体からなる記
録並びに再生用磁性針のガイド用畝を形成するこ
とを特徴とする磁気記録媒体の製造方法。1 A ferromagnetic thin film is formed to a uniform thickness on the surface of a disc-shaped or cylindrical soft magnetic material, and a spiral or helical non-magnetic material is formed on the surface of the ferromagnetic thin film for recording and reproduction. A method of manufacturing a magnetic recording medium, comprising forming a ridge for guiding a magnetic needle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP749882A JPS58125233A (en) | 1982-01-22 | 1982-01-22 | Magnetic recording body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP749882A JPS58125233A (en) | 1982-01-22 | 1982-01-22 | Magnetic recording body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58125233A JPS58125233A (en) | 1983-07-26 |
| JPH0227729B2 true JPH0227729B2 (en) | 1990-06-19 |
Family
ID=11667437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP749882A Granted JPS58125233A (en) | 1982-01-22 | 1982-01-22 | Magnetic recording body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58125233A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119934A (en) * | 1980-02-26 | 1981-09-19 | Masamitsu Kawakami | Magnetic recording medium and its production |
-
1982
- 1982-01-22 JP JP749882A patent/JPS58125233A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119934A (en) * | 1980-02-26 | 1981-09-19 | Masamitsu Kawakami | Magnetic recording medium and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58125233A (en) | 1983-07-26 |
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