JPS6232349Y2 - - Google Patents
Info
- Publication number
- JPS6232349Y2 JPS6232349Y2 JP1986089452U JP8945286U JPS6232349Y2 JP S6232349 Y2 JPS6232349 Y2 JP S6232349Y2 JP 1986089452 U JP1986089452 U JP 1986089452U JP 8945286 U JP8945286 U JP 8945286U JP S6232349 Y2 JPS6232349 Y2 JP S6232349Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- substrate
- base
- mounting hole
- disk substrate
- 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
- 239000000758 substrate Substances 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 7
- 239000010410 layer Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Description
【考案の詳細な説明】
本考案は、基板の中心部に設けた取付け用穴周
縁部を取付け金具により密接固定して回転駆動軸
に取付けて使用される磁気デイスク基板に使用さ
れる磁気デイスク基板に関するものである。[Detailed description of the invention] This invention is a magnetic disk substrate used in a magnetic disk substrate that is used by attaching the peripheral part of the mounting hole provided in the center of the substrate to a rotational drive shaft by closely fixing the peripheral part of the mounting hole with a mounting bracket. It is related to.
磁気記憶媒体として知られる磁気デイスク基板
は、アルミニウム材料からなる円板状の基体を用
い、その基体表面は高密度な磁気記録を得るた
め、精密旋盤あるいは研摩等によつて平滑仕上げ
を行なつている。さらにその表面の硬度及び面精
度を得るために、たとえば陽極化成処理等を施し
てその表面にアルミニウム酸化物皮膜を形成した
基板上にrFe203等の磁性材料を含む記憶用の磁
性層を形成して磁気デイスク媒体としている。そ
してこのような磁気デイスク媒体を使用する磁気
デイスク装置は、一般に前記構造デイスクを複数
枚、一定の間隔を持たせて同一回転駆動軸に取付
け、1000〜3000r.p.mの高速で回転させて各デイ
スクの基板の表裏面に配置した読み書きへツドに
よりデータ処理を行なつている。 A magnetic disk substrate, known as a magnetic storage medium, uses a disc-shaped base made of aluminum material, and the surface of the base is smoothed using a precision lathe or polishing to obtain high-density magnetic recording. There is. Furthermore, in order to obtain the hardness and surface precision of the surface, a magnetic layer for storage containing a magnetic material such as rFe203 is formed on a substrate that has been subjected to anodization treatment or the like to form an aluminum oxide film on the surface. It is used as a magnetic disk medium. A magnetic disk device using such a magnetic disk medium generally has a plurality of disks with the above-mentioned structure attached to the same rotational drive shaft at regular intervals, and each disk is rotated at a high speed of 1000 to 3000 rpm. Data processing is performed using read/write heads placed on the front and back sides of the board.
しかしながらこのように記録媒体である磁気デ
イスクを高速回転させると、その磁気デイスク表
面と空気との摩擦が著しくなりその表面層に静電
気が帯電しやすくなる。特に前記デイスク用基板
表面がアルマイトのような高抵抗性のアルミニウ
ム酸化物皮膜等によつて覆われると、その表面層
に帯電する電荷が蓄積され、前記基板の電位が高
くなる。このために磁気デイスク表面と磁気ヘツ
ドとの間に電位差が生じ、放電現象の発生が避け
られず、これが電気的ノイズとして記憶装置の性
能を損なう欠点があつた。 However, when a magnetic disk, which is a recording medium, is rotated at high speed in this manner, friction between the surface of the magnetic disk and the air becomes significant, and the surface layer is likely to be charged with static electricity. In particular, when the surface of the disk substrate is covered with a highly resistive aluminum oxide film such as alumite, charges are accumulated on the surface layer and the potential of the substrate becomes high. This creates a potential difference between the surface of the magnetic disk and the magnetic head, and the occurrence of a discharge phenomenon is unavoidable, which has the drawback of impairing the performance of the storage device as electrical noise.
本考案は上記従来の欠点を解消するためになさ
れたもので、前記磁気デイスク用基板は、導電性
であるアルミニウム基体の表面に絶縁性であるア
ルミニウム陽極酸化皮膜が施されるとともに、前
記取付け穴周縁部に該基体と前記回転駆動軸との
間の電気的接続を得るための基体露出部を設け、
磁気デイスクの高速回転によつて生ずる帯電を減
少可能とした磁気デイスク用基板を提供すること
を目的とする。 The present invention has been made in order to eliminate the above-mentioned conventional drawbacks. Providing a base body exposed part on the peripheral edge for obtaining an electrical connection between the base body and the rotational drive shaft,
It is an object of the present invention to provide a substrate for a magnetic disk that can reduce electrification caused by high-speed rotation of the magnetic disk.
以下図面を用いて本考案の実施例を詳細に説明
する。第１図は本考案に係る磁気デイスク用基板
の一実施例を平面図で示したもので、図中２は中
心取付け孔３を有するアルミニウム材料から成る
円板状基体である。まずこの基体２の片面または
両面上の前記取付け孔３の周辺部分４をあらかじ
め樹脂等からなる耐蝕性被膜でマスキングする
か、あるいは、ゴム等の“Ｏ”リングでマスキン
グし、しかる後、この基体１の各表面に選択的に
陽極化成処理等を施してアルミニウム酸化物皮膜
５を形成し、その後前記耐蝕性被膜を設けた場合
には溶解除去する手段により除去するか若しくは
ゴム等の“Ｏ”リングのマスキングをはずすこと
により図示のように基板１の表面には外周に近い
部分に前記アルミニウム酸化物皮膜５が形成さ
れ、取付け孔３の周辺部分４に基体面が露出した
状態となる。この場合、形成されたアルミニウム
酸化物皮膜上に設ける磁性層の磁気記憶面は、一
般にデイスク用基板の外周側からデイスク基板の
半径の約２分の１程度の外周部分を用いているの
で、本考案によつて磁気デイスクの記憶容量が減
せられることはない。 Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing an embodiment of a magnetic disk substrate according to the present invention, and in the figure, reference numeral 2 denotes a disk-shaped substrate made of aluminum material and having a center mounting hole 3. As shown in FIG. First, the peripheral portion 4 of the mounting hole 3 on one or both sides of this base body 2 is masked in advance with a corrosion-resistant coating made of resin or the like, or with an "O" ring made of rubber, etc., and then this base body 2 is An aluminum oxide film 5 is formed by selectively applying anodizing treatment or the like to each surface of 1, and then, if the corrosion-resistant film is provided, it is removed by means of dissolving or removing it, or by using "O" such as rubber. By removing the masking of the ring, the aluminum oxide film 5 is formed on the surface of the substrate 1 near the outer periphery as shown in the figure, and the substrate surface is exposed in the peripheral portion 4 of the mounting hole 3. In this case, the magnetic storage surface of the magnetic layer provided on the formed aluminum oxide film generally uses the outer circumferential portion of the disk substrate, which is approximately one-half the radius of the disk substrate from the outer circumferential side. The invention does not reduce the storage capacity of magnetic disks.
以上のように磁気デイスク用基板１を構成すれ
ば、第２図に示すように、たとえば磁性層６を設
けてなる前記磁気デイスク用基板１を、デイスク
回転軸からなる取付け軸２１に取付け金具２２ａ
及び２２ｂを用いて図示のように重ねるように装
着固定することにより、前記磁気デイスク用基板
１に設けた取付け孔３の周辺部分４、すなわち基
体露出部４が前記取付け軸２１に装着した取付け
金具２２ａの嵌合部２３といま一つの取付け金具
２２ｂによつて密接固定され電気的接続が得られ
ることとなる。従つて高速回転によつて前記磁気
デイスク表面部の磁性層６あるいは高抵抗性のア
ルミニウム酸化物皮膜５に空気との摩擦による静
電気が帯電しても、帯電によつて生じた電荷は
各々の皮膜の接触界面より前記アルミニウム基体
２へ漏れ電流として導かれ、前記基板１の基体露
出部４から前記取付け金具２２ａ及び２２ｂ、そ
して取付け軸２１を通して接触されることが可能
となる。 If the magnetic disk substrate 1 is configured as described above, as shown in FIG.
and 22b so that the peripheral portion 4 of the mounting hole 3 provided in the magnetic disk substrate 1, that is, the exposed base portion 4, is attached to the mounting bracket mounted on the mounting shaft 21 using The fitting part 23 of 22a and the other mounting fitting 22b are tightly fixed to provide an electrical connection. Therefore, even if the magnetic layer 6 or the high-resistance aluminum oxide film 5 on the surface of the magnetic disk is charged with static electricity due to friction with air due to high-speed rotation, the electric charge generated by the charging is transferred to each film. A leakage current is led to the aluminum base 2 from the contact interface of the aluminum base 2, and can be brought into contact from the base exposed portion 4 of the base 1 through the mounting fittings 22a and 22b and the mounting shaft 21.
さらに第３図は本考案にもとづくもう一つの実
施例を示すもので、第１図と同等同機能を有する
部分には同一符号を付した。第３図の実施例が第
１図のそれと異なる点は、基体２の中心取付け孔
３の周辺部分４、すなわち基体面が露出したパタ
ーンを図示のように前記取付け孔３の周辺部に島
状に形成配設したことである。このような構造と
すれば前記磁気デイスク用基板１上のアルミニウ
ム酸化物皮膜５が部分的に前記取付け孔３の周辺
に残置されるので前記周辺部分の強度が確保され
ると共に、前記基板１の取付け金具を改良するこ
とにより、前記第１図による実施例と同様の目的
が達成可能なことは明らかである。 Furthermore, FIG. 3 shows another embodiment based on the present invention, in which parts having the same functions as those in FIG. 1 are given the same reference numerals. The embodiment shown in FIG. 3 is different from that shown in FIG. It was formed and arranged. With this structure, the aluminum oxide film 5 on the magnetic disk substrate 1 is left partially around the mounting hole 3, so that the strength of the peripheral area is ensured and the strength of the substrate 1 is maintained. It is clear that by improving the mounting hardware it is possible to achieve the same objectives as in the embodiment according to FIG. 1 above.
以上の説明から明らかなように本考案に係る磁
気デイスク用基板を磁気記憶装置に用いること
で、回転駆動軸との電気的接続が可能となるので
高速回転によつて生ずる帯電を減少させることが
可能となり、障害となる電気的ノイズが防止され
信頼性を向上させることが出来る。 As is clear from the above description, by using the magnetic disk substrate according to the present invention in a magnetic storage device, it is possible to electrically connect with the rotational drive shaft, thereby reducing the charging caused by high-speed rotation. This makes it possible to prevent electrical noise that could be a nuisance and improve reliability.
第１図は本考案に係る磁気デイスク用基板の一
実施例を説明する平面図、第２図は本考案の磁気
デイスク用基板の取付け構成を説明する要部断面
図、第３図は本考案に係る磁気デイスク用基板の
もう一つの実施例を説明する平面図である。
１：基板、２：基体、３：取付け孔、４：周辺
部あるいは基体露出部、５：歳化物皮膜、６：磁
性層、２１：取付け軸、２２ａ及び２２ｂ：取付
け金具。
FIG. 1 is a plan view illustrating an embodiment of the magnetic disk substrate according to the present invention, FIG. 2 is a sectional view of main parts illustrating the mounting structure of the magnetic disk substrate according to the present invention, and FIG. 3 is a plan view illustrating an embodiment of the magnetic disk substrate according to the present invention. FIG. 3 is a plan view illustrating another embodiment of the magnetic disk substrate according to the present invention. 1: Substrate, 2: Substrate, 3: Mounting hole, 4: Periphery or exposed portion of base, 5: Aged film, 6: Magnetic layer, 21: Mounting shaft, 22a and 22b: Mounting metal fittings.
Claims (1)
け金具により密接固定して回転駆動部に取付け、
該基板を回転させてデータ処理を行う磁気デイス
ク装置に使用する磁気デイスク用基板であつて、 前記磁気デイスク用基板は、導電性であるアル
ミニウム基体の表面に絶縁性であるアルミニウム
陽極酸化皮膜が施されるとともに、 前記取付け穴周縁部に該基体と前記回転駆動軸
との間の電気的接続を得るための基体露出部を有
することを特徴とする磁気デイスク用基板。[Utility model claim] The peripheral portion of the mounting hole provided in the center of the board is tightly fixed with a mounting bracket to be attached to the rotation drive unit,
A magnetic disk substrate used in a magnetic disk device which processes data by rotating the substrate, the magnetic disk substrate having an insulating aluminum anodized film applied to the surface of a conductive aluminum base, and a base exposed portion around the periphery of the mounting hole for achieving electrical connection between the base and the rotary drive shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986089452U JPS6232349Y2 (en) | 1986-06-12 | 1986-06-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986089452U JPS6232349Y2 (en) | 1986-06-12 | 1986-06-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62220U JPS62220U (en) | 1987-01-06 |
| JPS6232349Y2 true JPS6232349Y2 (en) | 1987-08-19 |
Family
ID=30643542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986089452U Expired JPS6232349Y2 (en) | 1986-06-12 | 1986-06-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6232349Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4918316A (en) * | 1972-04-19 | 1974-02-18 | ||
| JPS5148302A (en) * | 1974-10-24 | 1976-04-26 | Nippon Telegraph & Telephone | KOKIROKUMITSUDOYOJIKIDEISUKUKIBAN |
-
1986
- 1986-06-12 JP JP1986089452U patent/JPS6232349Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4918316A (en) * | 1972-04-19 | 1974-02-18 | ||
| JPS5148302A (en) * | 1974-10-24 | 1976-04-26 | Nippon Telegraph & Telephone | KOKIROKUMITSUDOYOJIKIDEISUKUKIBAN |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62220U (en) | 1987-01-06 |
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