JPH02172017A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPH02172017A JPH02172017A JP32580188A JP32580188A JPH02172017A JP H02172017 A JPH02172017 A JP H02172017A JP 32580188 A JP32580188 A JP 32580188A JP 32580188 A JP32580188 A JP 32580188A JP H02172017 A JPH02172017 A JP H02172017A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic disk
- coating
- disk medium
- thickness
- 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
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 4
- 238000001029 thermal curing Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 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〕
本発明は塗布形磁気ディスク媒体に係り、特にオーバー
ライド特性に好適な磁気ディスク媒体の構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coated magnetic disk medium, and particularly to a structure of a magnetic disk medium suitable for override characteristics.
磁気ディスク装置は、高密度化に伴ない外周部のオーバ
ーライド特性が低下していたが、これを防ぐ為磁気ディ
スク装置は内周部と外周部で書込電流を切換えている。In magnetic disk drives, override characteristics at the outer circumference have deteriorated as the density has increased, but in order to prevent this, magnetic disk drives switch the write current between the inner circumference and the outer circumference.
しかし、最近更に高密度化が図られている為今度は、中
周部のオーバーライド特性が低下して来ている。However, as the density has been increased recently, the override characteristics in the middle portion have been decreasing.
従来の公知例では、これを防ぐ様な例はないがこの種の
磁気ディスク媒体として関連するものには例えば、特開
昭５８−８５９３３号公報に記載のように、磁性膜の厚
さを外周はど薄くすることにより再生出力を一定にする
とか、特開昭６０−４０５２９号公報に記載のように
、内周部の磁性膜の厚さを外周の他の領域よりも小さく
することにより内部と外部のトラック帯域との間の確実
な出力を与える と云う例が挙げられる。Although there is no conventionally known example that prevents this, for example, in related magnetic disk media of this type, as described in Japanese Patent Application Laid-open No. 58-85933, the thickness of the magnetic film is adjusted to the outer periphery. As described in Japanese Unexamined Patent Publication No. 60-40529, by making the thickness of the magnetic film on the inner periphery smaller than on other areas on the outer periphery, An example of this would be to provide a reliable output between the external track band and the external track band.
上記従来技術は高密度化による中周部オーバーライド特
性の低下を防止する点について配慮がされておらず、高
記録密度化を図る上で問題があった。The above-mentioned conventional technology does not give consideration to preventing the deterioration of the override characteristics of the middle circumferential portion due to the increase in density, and there is a problem in achieving a high recording density.
本発明の目的は、オーバーライド特性を改善し高記録密
度に適した磁気ディスク媒体を提供することにある。An object of the present invention is to provide a magnetic disk medium with improved override characteristics and suitable for high recording density.
上記目的を達成するために、中周部の磁性膜の厚さを、
外周及び内周部の磁性膜の厚さよりも薄くしたものであ
る。In order to achieve the above objective, the thickness of the magnetic film in the middle part was
The thickness is made thinner than the thickness of the magnetic film at the outer and inner circumferential portions.
一般的にオーバーライド特性は、ｉ）磁気ディスク媒体
の磁性膜が厚くなる程低下する。ｉｉ）ヘッド浮上量が
大きくなる程低下する ｎｉ）書込電流を大きくすると
改善される ことが知られている。In general, override characteristics deteriorate as i) the magnetic film of the magnetic disk medium becomes thicker; ii) It decreases as the head flying height increases. ni) It is known that it can be improved by increasing the write current.
また磁気ディスク装置において、ヘッド）ｌ上皿は外周
部程高くなる（周速の為）。Furthermore, in a magnetic disk drive, the head (1) upper plate becomes higher toward the outer periphery (due to the circumferential speed).
よって磁気ディスク装置の高密度化に伴ない外周部のオ
ーバーライド特性の低下が問題になってきた。これを改
善する為磁気ディスク′Ｊ装置は、第１図に示す様に磁
気ディスク媒体１の内周Ａ領域はＩＷ工で、外周Ｂ領域
はＩＷ２（ＩＷｌ＜ＩＷ２）で信号を書込むことによっ
てオーバーライド特性の改溌を行なってきた。Therefore, as the density of magnetic disk drives increases, the deterioration of the override characteristics at the outer periphery has become a problem. In order to improve this, the magnetic disk 'J device writes signals using IW processing on the inner circumference A area of the magnetic disk medium 1 and IW2 (IWl<IW2) on the outer circumference B area, as shown in Fig. 1. We have improved the override characteristics.
しかし、更に高密度化を図ると、今度はＡ領域の外周部
つまり中周部Ｃ領域でのオーバーライド特性が問題にな
ってきた。よってこれを改善するため中周部の磁性膜を
他の領域よりも薄くすることにより改善することが出来
る。However, when the density is further increased, the override characteristic at the outer periphery of the A area, that is, the middle periphery C area becomes a problem. Therefore, this can be improved by making the magnetic film in the middle region thinner than in other regions.
以下、本発明の一実施例を第２図により説明する。 An embodiment of the present invention will be described below with reference to FIG.
磁気ティスフ媒体は、中心部に取付穴２を有するアルミ
基板３に磁性塗料を塗布し、熱硬化９表面仕上げを施す
ことにより磁性ＷＪ４を形成し、磁気ディスク媒体とな
る。The magnetic disk medium is a magnetic disk medium by applying magnetic paint to an aluminum substrate 3 having a mounting hole 2 in the center and applying a thermosetting 9 surface finish to form a magnetic WJ4.
上記塗布又は表面仕上工程に於て、中周部の磁性層４の
厚さを、内周及び外周部より薄く形成する。In the above coating or surface finishing step, the thickness of the magnetic layer 4 at the middle circumference is formed to be thinner than at the inner and outer circumferences.
本実施例によればオーバーライド特性が改η出来るため
高記録密度化が図れると云う効果がある。According to this embodiment, since the override characteristic can be modified, the recording density can be increased.
本発明によれば、中周部のオーバーライド特性が改善出
来るので高記録密度化が図れると云う効果がある。According to the present invention, it is possible to improve the override characteristics of the middle circumferential portion, so that it is possible to achieve a higher recording density.
第１図は本発明の一実施例の磁気ディスク装置の動作説
明図、
第２図は本発明の一実施例の断面図である。
１・・・磁気ディスク媒体、２・・・取付穴、３・・・
アルミ基板、４・・・磁性層。
纂 ｊ 図
纂 Ｚ 図FIG. 1 is an explanatory diagram of the operation of a magnetic disk device according to an embodiment of the present invention, and FIG. 2 is a sectional view of an embodiment of the present invention. 1...Magnetic disk medium, 2...Mounting hole, 3...
Aluminum substrate, 4...magnetic layer.纂 ＂ ＂ ＂ ＂ ＂
Claims (1)
の磁性膜の厚さを薄くしたことを特徴とする磁気記録媒
体。1. A magnetic recording medium characterized in that the thickness of the magnetic film in the middle portion is made thinner in the manufacturing process of the coated magnetic disk medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32580188A JPH02172017A (en) | 1988-12-26 | 1988-12-26 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32580188A JPH02172017A (en) | 1988-12-26 | 1988-12-26 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02172017A true JPH02172017A (en) | 1990-07-03 |
Family
ID=18180746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32580188A Pending JPH02172017A (en) | 1988-12-26 | 1988-12-26 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02172017A (en) |
-
1988
- 1988-12-26 JP JP32580188A patent/JPH02172017A/en active Pending
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