JPH039131Y2 - - Google Patents
Info
- Publication number
- JPH039131Y2 JPH039131Y2 JP1981093943U JP9394381U JPH039131Y2 JP H039131 Y2 JPH039131 Y2 JP H039131Y2 JP 1981093943 U JP1981093943 U JP 1981093943U JP 9394381 U JP9394381 U JP 9394381U JP H039131 Y2 JPH039131 Y2 JP H039131Y2
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- lubricant
- magnetic
- base material
- magnetic disk
- 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
Links
- 239000010409 thin film Substances 0.000 claims description 33
- 239000000314 lubricant Substances 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 15
- 238000005498 polishing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
Description
【考案の詳細な説明】
本考案は磁気デイスクに係り、特に磁性体で形
成した円板表面の薄膜に非研磨部を残した磁性薄
膜層の仕上げ形状に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk, and more particularly to the finished shape of a magnetic thin film layer that leaves a non-polished portion in the thin film on the surface of the disk formed of a magnetic material.
従来、磁気デイスクは円板基材表面に磁性体で
薄膜層を形成し、薄膜表面を全面研磨した後に、
薄膜の保護と耐久性確保の為、潤滑剤を塗布して
いた。磁気デイスクの表面はセンターホール周辺
に基材露出（クランプ・エリア）部があり、その
外側円周部を磁性薄膜で覆つた形状であつて、潤
滑剤の塗布は磁気デイスクを潤滑剤溶液中にジヤ
ブ付けすることで行つていた。薄膜内の潤滑剤の
吸収は面の滑らかさに反比例し、膜厚に比例す
る。薄膜に付着（塗布）した潤滑剤は薄膜表面か
ら薄膜内に吸収されるが、基材露出部に付着した
潤滑剤はそのまま表面に残留し、そのままで磁気
デイスク装置に装着使用すると、磁気デイスクの
高速回転による遠心力で、磁気ヘツド浮上エリア
部に流出し、磁気ヘツドとの吸着力が発生しクラ
ツシユの原因になる不都合がある。 Conventionally, magnetic disks are made by forming a thin film layer of magnetic material on the surface of a disc base material, and after polishing the entire surface of the thin film,
A lubricant was applied to protect the thin film and ensure durability. The surface of the magnetic disk has an exposed base material (clamp area) around the center hole, and the outer circumference is covered with a magnetic thin film.To apply lubricant, the magnetic disk is placed in a lubricant solution. This was done by wearing a jacket. The absorption of lubricant within a thin film is inversely proportional to the smoothness of the surface and proportional to the film thickness. The lubricant attached (applied) to the thin film is absorbed into the thin film from the surface of the thin film, but the lubricant attached to the exposed part of the base material remains on the surface, and if the lubricant is attached to the magnetic disk device and used as is, the magnetic disk will be damaged. The centrifugal force caused by high-speed rotation flows into the floating area of the magnetic head, creating an adhesion force with the magnetic head and causing a crash.
適量の潤滑剤を吸収した薄膜上に、更に余分な
潤滑剤を流入すると、過多状態となる危険がある
ので、基材露出部に付着した潤滑剤はすべて拭き
取る手間が必要であつた。 If excess lubricant flows onto a thin film that has absorbed an appropriate amount of lubricant, there is a risk of an overabundance, so it is necessary to take the trouble of wiping off all the lubricant that has adhered to the exposed parts of the base material.
本考案の目的は、基材露出部の潤滑剤を拭き取
らずに磁気デイスク装置に装着した磁気デイスク
の残留潤滑剤の流入を防止する事にあり、本目的
を達成する為の本考案になる磁気デイスクは、円
板基材内周のクランプ部分を除いて該円板基材表
面に磁性薄膜を形成し、該磁性薄膜に潤滑剤を浸
透させてなる磁気デイスクにおいて、クランプ部
分とデータ記録領域の間の磁性薄膜を、前記デー
タ記録領域の磁性薄膜より厚く形成することによ
り、データ記録領域の磁性薄膜には潤滑剤を十分
浸透させると共に、磁性薄膜を厚く形成した領域
には潤滑剤が十分浸透しない部分を残し、クラン
プ部分に残留した潤滑剤が磁気デイスクの回転遠
心力によりデータ記録領域側に流出しても、その
潤滑剤を前述の潤滑剤が十分浸透してない部分で
吸収するようにしたものであり、詳細は以下の図
を用いた説明で明らかにする。 The purpose of this invention is to prevent the inflow of residual lubricant from a magnetic disk mounted in a magnetic disk device without wiping off the lubricant on the exposed portion of the base material, and this invention has been developed to achieve this purpose. A magnetic disk is a magnetic disk in which a magnetic thin film is formed on the surface of a disc base material except for a clamp part on the inner periphery of the disc base material, and a lubricant is permeated into the magnetic thin film. By forming the magnetic thin film between the areas to be thicker than the magnetic thin film in the data recording area, the lubricant can be sufficiently penetrated into the magnetic thin film in the data recording area, and the lubricant can be sufficiently applied to the area where the magnetic thin film is formed thickly. Even if the lubricant remaining in the clamp part flows out to the data recording area side due to the rotating centrifugal force of the magnetic disk, the lubricant is absorbed by the part where the lubricant has not penetrated sufficiently. The details will be clarified in the explanation using the figures below.
第１図は本考案の一実施例になる磁気デイスク
の側断面図の概略図である。図において、ａは磁
性薄膜の塗布形状図、ｂは磁性薄膜の研磨後の形
状図、ｃは磁気デイスクを潤滑剤溶液にジヤブ付
けし、潤滑剤を磁性薄膜内に含浸させた状態図で
ある。１は磁気デイスク１００ののセンタ・ホー
ル、２は基材、３は磁性薄膜、４は基材２の露出
面、１０は磁性薄膜３の研磨部、１１は磁性薄膜
３の非研磨部、２０は磁性薄膜３に含浸した潤滑
剤、２１は基材の露出面４上に残留した潤滑剤で
ある。ｂ図に示す磁性薄膜形状を持つ磁気デイス
クに適量の潤滑剤を含浸させると、ｃ図の陰影の
ような含浸状態になつて、非研磨部１１の内部に
は非含浸部があつて、更に潤滑剤を吸収する余裕
がある。ｃ図の磁気デイスクを高速回転すると、
遠心力によつて基材の露出部４上の残留潤滑剤２
１は非研磨部１１に吸収されてしまう。 FIG. 1 is a schematic side sectional view of a magnetic disk according to an embodiment of the present invention. In the figure, a is a diagram of the applied shape of the magnetic thin film, b is a diagram of the shape of the magnetic thin film after polishing, and c is a diagram of the state in which a magnetic disk is soaked in a lubricant solution and the lubricant is impregnated into the magnetic thin film. . 1 is a center hole of the magnetic disk 100, 2 is a base material, 3 is a magnetic thin film, 4 is an exposed surface of the base material 2, 10 is a polished part of the magnetic thin film 3, 11 is an unpolished part of the magnetic thin film 3, 20 21 is a lubricant impregnated into the magnetic thin film 3, and 21 is a lubricant remaining on the exposed surface 4 of the base material. When a magnetic disk having the magnetic thin film shape shown in figure b is impregnated with an appropriate amount of lubricant, it becomes an impregnated state as shown by the shading in figure c, and there is a non-impregnated part inside the non-polished part 11. There is room to absorb lubricant. When the magnetic disk in figure c is rotated at high speed,
The residual lubricant 2 on the exposed part 4 of the base material is removed by centrifugal force.
1 is absorbed into the non-polished portion 11.
本考案の一実施例によれば、残留潤滑剤は非研
磨部の薄膜に吸収されるので、残留潤滑剤を拭き
取る手間がはぶける効果がある。 According to one embodiment of the present invention, the residual lubricant is absorbed into the thin film of the non-polishing portion, thereby eliminating the need for wiping off the residual lubricant.
本考案によれば、磁気デイスクの潤滑剤塗布後
の仕上工数が省略できる効果がある。 According to the present invention, there is an effect that the number of finishing steps after applying the lubricant to the magnetic disk can be omitted.
第１図は磁気デイスクの側断面図、ａは薄膜の
塗布形状図、ｂは薄膜の研磨後の形状図、ｃは潤
滑剤の含浸状態図であつて、１００は磁気デイス
ク、１はセンタ・ホール、２は基材、３は磁性薄
膜、４は基材露出部、１０は研磨部、１１は非研
磨部、２０は含浸潤滑剤、２１は残留潤滑剤であ
る。
FIG. 1 is a side sectional view of the magnetic disk, a shows the shape of the thin film applied, b shows the shape of the thin film after polishing, and c shows the state of lubricant impregnation. 2 is a base material, 3 is a magnetic thin film, 4 is an exposed part of the base material, 10 is a polished part, 11 is a non-polished part, 20 is an impregnated lubricant, and 21 is a residual lubricant.
Claims (1)
材表面に磁性薄膜を形成し、該磁性薄膜に潤滑剤
を浸透させてなる磁気デイスクにおいて、 前記クランプ部分とデータ記録領域の間の磁性
薄膜は、前記データ記録領域の磁性薄膜より厚く
形成されたことを特徴とする磁気デイスク。[Scope of Claim for Utility Model Registration] A magnetic disk in which a magnetic thin film is formed on the surface of a disc base material except for the clamp portion on the inner periphery of the disc base material, and a lubricant is permeated into the magnetic thin film, the clamp comprising: A magnetic disk characterized in that a magnetic thin film between the part and the data recording area is formed thicker than a magnetic thin film in the data recording area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9394381U JPS582728U (en) | 1981-06-25 | 1981-06-25 | magnetic disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9394381U JPS582728U (en) | 1981-06-25 | 1981-06-25 | magnetic disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS582728U JPS582728U (en) | 1983-01-08 |
| JPH039131Y2 true JPH039131Y2 (en) | 1991-03-07 |
Family
ID=29888899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9394381U Granted JPS582728U (en) | 1981-06-25 | 1981-06-25 | magnetic disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS582728U (en) |
-
1981
- 1981-06-25 JP JP9394381U patent/JPS582728U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS582728U (en) | 1983-01-08 |
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