JPH02137105A - Magnetic recording device and manufacture - Google Patents
Magnetic recording device and manufactureInfo
- Publication number
- JPH02137105A JPH02137105A JP29115788A JP29115788A JPH02137105A JP H02137105 A JPH02137105 A JP H02137105A JP 29115788 A JP29115788 A JP 29115788A JP 29115788 A JP29115788 A JP 29115788A JP H02137105 A JPH02137105 A JP H02137105A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- recording medium
- recording device
- recess
- contact
- 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 title claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 238000003486 chemical etching Methods 0.000 claims description 5
- 229910018134 Al-Mg Inorganic materials 0.000 claims description 3
- 229910018131 Al-Mn Inorganic materials 0.000 claims description 3
- 229910018137 Al-Zn Inorganic materials 0.000 claims description 3
- 229910018467 Al—Mg Inorganic materials 0.000 claims description 3
- 229910018461 Al—Mn Inorganic materials 0.000 claims description 3
- 229910018573 Al—Zn Inorganic materials 0.000 claims description 3
- 229910018182 Al—Cu Inorganic materials 0.000 claims description 2
- 229910018125 Al-Si Inorganic materials 0.000 claims 2
- 229910018520 Al—Si Inorganic materials 0.000 claims 2
- 238000000034 method Methods 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- 238000005530 etching Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000005496 eutectics Effects 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000006023 eutectic alloy Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はビデオテープレコーダー等の磁気記録装置及び
その製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording device such as a video tape recorder and a method of manufacturing the same.
従来の技術
従来、磁気記録装置の高密度化の要求にこたえるために
磁気記録媒体上に記録される信号の波長を小さくする努
力がなされている。このような短波長化を進めるために
は、磁気ヘッドと磁気記録媒体間のスペースを出来る限
り小さくする必要がある。このようなスペースは磁気記
録媒体表面上に存在する面荒れ等によっておきる。媒体
の表面荒さを変化させたときのある波長におけるキャリ
ア・ノイズレシオを第２図にしめす。この第２図に示す
グラフの結果より明らかなように媒体表面の荒さを低減
することによってＯ／Ｎ％性を向上させることが出来る
ことがわかる。2. Description of the Related Art In order to meet the demand for higher density magnetic recording devices, efforts have been made to reduce the wavelength of signals recorded on magnetic recording media. In order to promote such a short wavelength, it is necessary to make the space between the magnetic head and the magnetic recording medium as small as possible. Such spaces are caused by surface roughness existing on the surface of the magnetic recording medium. Figure 2 shows the carrier-to-noise ratio at a certain wavelength when the surface roughness of the medium is changed. As is clear from the graph shown in FIG. 2, it is possible to improve the O/N ratio by reducing the roughness of the medium surface.
発明が解決しようとする課題
しかし、このように磁気記録媒体表面を平滑化すると、
これと摺接する部材との実効接触面積が増加するために
、このときの摩擦係数が増加する。Problems to be Solved by the Invention However, when the surface of the magnetic recording medium is smoothed in this way,
Since the effective contact area between this and the member slidingly contacts increases, the coefficient of friction at this time increases.
また磁気記録媒体表面には一般に水分子が吸着し水の層
を形成しておりこれは外部の湿度が高いとき厚くなる。Additionally, water molecules are generally adsorbed on the surface of a magnetic recording medium to form a layer of water, which becomes thicker when the outside humidity is high.
そして、磁気記録媒体表面に存在する凹凸がこの水の層
によって埋められたとき、静止摩擦係数は極めて大きく
なって、磁気記録媒体と、これに摺接する部材に貼り付
くような現象が発生する。特に磁気記録媒体表面の粗さ
が小さくなると、水の層が磁気記録媒体表面の凹凸を埋
め易くなるため、このような貼り付きが生じ易くなる。When the unevenness existing on the surface of the magnetic recording medium is filled with this layer of water, the coefficient of static friction becomes extremely large, causing a phenomenon in which the magnetic recording medium sticks to the member that slides thereon. In particular, when the roughness of the surface of a magnetic recording medium becomes small, it becomes easier for the water layer to fill in the irregularities on the surface of the magnetic recording medium, and this type of sticking becomes more likely to occur.
このため磁気記録媒体の形状がテープである場合、その
高さを規制するために設けられた固定ポストに磁気記録
媒体走行面が貼り付いた状態になり前記テープを走行さ
せることが出来なくなる。For this reason, when the magnetic recording medium is in the form of a tape, the running surface of the magnetic recording medium sticks to a fixed post provided to regulate its height, making it impossible to run the tape.
このような現象は現在市販されているビデオテープレコ
ーダーのように、磁気ヘッドが取り付けられた回転可能
な円筒状の上シリンダと、磁気記録媒体を所望の高さで
規制するガイドを有する下シリンダを有し、上シリンダ
を回転させながら上下シリンダに磁気テープを巻き付け
て磁気テープの磁性面上に信号を記録再生するような装
置の場合、媒体の磁気テープ表面が平滑になるほど、下
シリンダでの貼り付きがし易くなる。また上シリンダが
一区回転を停止し再び回転しようとしたときに同様な貼
り付きが生じ上シリンダが回転できなくなる。またこの
ような貼り付きが起こらない場合でも、動摩擦係数が大
きいために固定ポストや下シリンダ上でスティックスリ
ップやテープ泣きを起こし磁気テープが安定に走行しな
い。This phenomenon occurs when video tape recorders currently on the market have a rotatable cylindrical upper cylinder with a magnetic head attached, and a lower cylinder with a guide that regulates the magnetic recording medium at a desired height. In the case of a device that records and reproduces signals on the magnetic surface of the magnetic tape by winding magnetic tape around the upper and lower cylinders while rotating the upper cylinder, the smoother the surface of the magnetic tape on the medium, the easier it is to wrap the magnetic tape on the lower cylinder. It becomes easier to attach. Furthermore, when the upper cylinder stops rotating for a period of time and attempts to rotate again, a similar sticking occurs and the upper cylinder becomes unable to rotate. Even if such sticking does not occur, the magnetic tape does not run stably due to the large coefficient of dynamic friction, which causes stick-slip or tape tearing on the fixed post or lower cylinder.
以上述べてきたように、短波長領域の特性を向上させる
ために磁気記録媒体の表面を平滑にすると、これを安定
に走行させることが困難であるという課題がある。As described above, when the surface of a magnetic recording medium is made smooth in order to improve the characteristics in the short wavelength region, there is a problem in that it is difficult to run the medium stably.
本発明は、このような従来技術の課題を解決した磁気記
録装置及びその製造方法を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording device and a manufacturing method thereof that solve the problems of the prior art.
磁気記録媒体と摺接する部材面に平均直径が１０矯ｉ→
発明は、磁気記録媒体と摺接する部材面を化学エツチン
グすることを特徴とする。The average diameter of the member surface that comes into sliding contact with the magnetic recording medium is 10 mm →
The invention is characterized in that the surface of the member that comes into sliding contact with the magnetic recording medium is chemically etched.
作用
本発明は、磁気記録媒体この部材面に接触する部材面上
に窪みが形成されているために、これと接触する磁気記
録媒体との実効的な接触面積が減少することになり、接
触時の摩擦係数が小さくなる。また磁気記録媒体表面に
水の薄い層が形成されていても、この窪みによって水の
層が分断されるために貼り付き等が起こりにくい。した
がって、短波長領域の特性を向上させるために磁気記録
媒体の表面を平滑にしても安定に走行させることが可能
となる。Effect of the present invention is that since a depression is formed on the surface of the member that contacts the surface of the magnetic recording medium, the effective contact area between the depression and the magnetic recording medium that comes into contact with the depression decreases. The coefficient of friction becomes smaller. Furthermore, even if a thin layer of water is formed on the surface of the magnetic recording medium, the water layer is divided by the depressions, making it difficult for sticking and the like to occur. Therefore, even if the surface of the magnetic recording medium is made smooth in order to improve the characteristics in the short wavelength region, it is possible to run the magnetic recording medium stably.
実施例
第１図は本発明を用いた固定ポストの製造方法を示した
図である。Embodiment FIG. 1 is a diagram showing a method of manufacturing a fixed post using the present invention.
ムｆｉ−３ｉ亜共晶合金からなる固定ポスト１をアセト
ン等の有機溶剤で充分に洗浄した後、６０”Ｃ１６規定
のＮａＯＨ溶液に約６秒間浸漬して化学エツチングする
。Ａｌ−ｓｉ合金の組織は断面の模式図を第１図すに示
す断面模式図のように、亜共晶合金であるので共晶２と
α相３の二相からなる。After thoroughly cleaning the fixed post 1 made of Mufi-3i hypoeutectic alloy with an organic solvent such as acetone, it is chemically etched by immersing it in a 60" C16 standard NaOH solution for about 6 seconds. The structure of the Al-Si alloy. As shown in the schematic cross-sectional view of Figure 1, it is a hypoeutectic alloy and consists of two phases: eutectic 2 and α phase 3.
Ｎａ１ｌ溶液に対する化学エツチング速度は、α相３の
方が、共晶２よりも大きいため、化学エツチング後は、
第２図Ｃに示すような窪み４が形成される。The chemical etching rate for Na1L solution is higher for α phase 3 than for eutectic 2, so after chemical etching,
A depression 4 as shown in FIG. 2C is formed.
窪み４の直径はＡｌ−８１亜共晶合金の鋳込み時に形成
される組織に依存するがおおむね１０〜１００μｍであ
る。又、窪み４の深さについてはＮａＯＨ溶液の温度と
浸漬時間によって影響を受けるが、６０°Ｃ，６秒の化
学エツチングでは、およそＯ，Ｓ〜１μ諺である。The diameter of the depression 4 depends on the structure formed during casting of the Al-81 hypoeutectic alloy, but is approximately 10 to 100 μm. Further, the depth of the recess 4 is influenced by the temperature of the NaOH solution and the immersion time, but in chemical etching at 60 DEG C. for 6 seconds, the depth is about O.S.about.1 .mu.m.
このようにして得られる上記の直径と深さの範囲内の窪
みを形成した固定ポストを使用した磁気記録装置により
磁気記録媒体を走行させたところ。A magnetic recording medium was run using a magnetic recording device using a fixed post formed with a recess within the diameter and depth ranges described above.
安定走行性が実現できた。Stable running performance was achieved.
本実施例では、固定ポストに本発明を適用した例につい
て述べたが、上シリンダや下シリンダに本発明を適用す
ることも容易に実施できる。又、Ａｌ−８ｉ亜共晶合金
以外に二相共存組織を有するＡｌ−Ｃｕ、Ａｌ−Ｍｇ、
Ａｌ−Ｚｎ、Ａｌ−Ｍｎ合金を使用しても上記実施例と
同等の効果が得られる。In this embodiment, an example in which the present invention is applied to a fixed post has been described, but the present invention can also be easily applied to an upper cylinder or a lower cylinder. In addition to the Al-8i hypoeutectic alloy, Al-Cu, Al-Mg,
Even if Al-Zn or Al-Mn alloys are used, the same effects as in the above embodiments can be obtained.
発明の効果
本発明によって形成された窪みを有するポストや上下シ
リンダを用いると、これと接触する磁気テープ等の磁気
記録媒体との実効的な接触面積が減少するために、摩擦
係数が小さくなる。また媒体表面に水の薄い層が形成さ
れていても、この窪みによって水の層が分断されるため
に貼り付き等が起こりにくいという長所がある。したが
って本発明による磁気記録装置によれば短波長特性を向
上させるために磁気記録媒体の表面を平滑にしても安定
に走行させることができる。Effects of the Invention When a post or upper and lower cylinders having recesses formed according to the present invention is used, the effective contact area with a magnetic recording medium such as a magnetic tape that comes into contact with the post or the upper and lower cylinders is reduced, so that the coefficient of friction is reduced. Further, even if a thin layer of water is formed on the surface of the medium, the water layer is divided by the depressions, so there is an advantage that sticking is less likely to occur. Therefore, according to the magnetic recording device according to the present invention, even if the surface of the magnetic recording medium is made smooth to improve short wavelength characteristics, the magnetic recording medium can be run stably.
第１図は本発明の一実施例として固定ポストの製造手順
を示す図面であり、第１図１は固定ポストの斜視図、同
図すは化学エツチング処理前の固定ポストの断面模式図
、同図０は同機中ｅ固定ポストを化学エツチング処理し
た後の断面模式図、第２図は磁気記録媒体表面粗さとＣ
／Ｎ値との関係を示す図である。
１・・・・・・固定ポスト、２・・・・・・共晶、３・
・・・・・α相。
代理人の氏名 弁理士 粟 野 重 孝 ほか１名１図
第 ２ 図
最υ画祖さくＡ＞FIG. 1 is a drawing showing the manufacturing procedure of a fixed post as an embodiment of the present invention. FIG. Figure 0 is a schematic cross-sectional view of the e-fixing post in the machine after chemical etching treatment, and Figure 2 shows the surface roughness and C of the magnetic recording medium.
It is a figure which shows the relationship with /N value. 1... fixed post, 2... eutectic, 3.
...α phase. Name of agent: Patent attorney Shigetaka Awano and one other person Figure 1 Figure 2 Figure 1. Artist Saku A>
Claims (8)
μｍ〜１００μｍで、かつ平均深さが０．６μｍ〜１μ
ｍの窪みが設けられていることを特徴とする磁気記録装
置。(1) The average diameter of the member surface that comes into sliding contact with the magnetic recording medium is 10
μm to 100 μm, and average depth is 0.6 μm to 1 μm
A magnetic recording device characterized in that a recess of m is provided.
とを特徴とする請求項１記載の磁気記録装置。(2) The magnetic recording device according to claim 1, wherein the member surface provided with the depression is a cylinder.
摺動面であることを特徴とする請求項１記載の磁気記録
装置。(3) The magnetic recording device according to claim 1, wherein the member surface provided with the depression is a medium sliding surface of a fixed post.
Ｃｕ、Ａｌ−Ｍｇ、Ａｌ−Ｚｎ及びＡｌ−Ｍｎの中から
選ばれた亜共晶合金であることを特徴とする請求項１記
載の磁気記録装置。(4) The member provided with the depression is Al-Si, Al-
2. The magnetic recording device according to claim 1, wherein the magnetic recording device is a hypoeutectic alloy selected from Cu, Al-Mg, Al-Zn, and Al-Mn.
記載の磁気記録装置。(5) Claim 1 characterized in that the depression is in α phase.
The magnetic recording device described.
することを特徴とする磁気記録装置の製造方法。(6) A method for manufacturing a magnetic recording device, which comprises chemically etching a surface of a member that comes into sliding contact with a magnetic recording medium.
Ａｌ−Ｃｕ、Ａｌ−Ｍｇ、Ａｌ−Ｚｎ及びＡｌ−Ｍｎの
中から選ばれた亜共晶合金であることを特徴とする請求
項６記載の磁気記録装置の製造方法。(7) The member that comes into sliding contact with the magnetic recording medium is Al-Si,
7. The method of manufacturing a magnetic recording device according to claim 6, wherein the hypoeutectic alloy is selected from Al-Cu, Al-Mg, Al-Zn, and Al-Mn.
ことを特徴とする請求項６記載の磁気記録装置の製造方
法。(8) The method for manufacturing a magnetic recording device according to claim 6, wherein the chemical etching solution is a sodium hydroxide solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29115788A JPH02137105A (en) | 1988-11-17 | 1988-11-17 | Magnetic recording device and manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29115788A JPH02137105A (en) | 1988-11-17 | 1988-11-17 | Magnetic recording device and manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02137105A true JPH02137105A (en) | 1990-05-25 |
Family
ID=17765184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29115788A Pending JPH02137105A (en) | 1988-11-17 | 1988-11-17 | Magnetic recording device and manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02137105A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6535352B2 (en) | 1997-12-15 | 2003-03-18 | Seagate Technology Llc | Head media interface for stiction control |
-
1988
- 1988-11-17 JP JP29115788A patent/JPH02137105A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6535352B2 (en) | 1997-12-15 | 2003-03-18 | Seagate Technology Llc | Head media interface for stiction control |
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