JPH0344805A - Magnetic head and its production - Google Patents
Magnetic head and its productionInfo
- Publication number
- JPH0344805A JPH0344805A JP18089689A JP18089689A JPH0344805A JP H0344805 A JPH0344805 A JP H0344805A JP 18089689 A JP18089689 A JP 18089689A JP 18089689 A JP18089689 A JP 18089689A JP H0344805 A JPH0344805 A JP H0344805A
- Authority
- JP
- Japan
- Prior art keywords
- medium
- sliding contact
- contact surface
- head
- area
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 claims description 29
- 230000007423 decrease Effects 0.000 abstract description 4
- 230000006866 deterioration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明はＶＴＲ（ビデオテープレコーダ）、ＤＡＴ（デ
ジタルオーディオチーブレコーダ）等の磁気記録装置に
用いられる磁気ヘッド及びその製造力を去に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a magnetic head used in a magnetic recording device such as a VTR (video tape recorder) or a DAT (digital audio recorder), and its manufacturing capability.
（ロ）従来の技術
一般に、ＶＴＲ等に用いられる磁気ヘッドでは媒体との
当りを良くするために第１４図に示すようにコアブロッ
ク（１）の状態で媒体摺接側の端面（２）ｉ：ｔｉ１１
粒が＃２０００−＃４００ｏの円筒研削機等により円弧
状に大Ｒ付加工を施した後、前記コアブロックをスライ
スしてなるヘッドチップの媒体摺接側の端面に特開昭５
９−１７２１１０号公？１７ （Ｇ１１Ｂ５／１８７）
に示されているようなへｌド研磨装置を用いてテープラ
ップ加工を行うことにより前述の円筒研削機等の加工に
より生じた傷を除去して媒体摺接面を形成している。(b) Prior Art In general, in a magnetic head used in a VTR, etc., in order to improve the contact with the medium, the core block (1) is placed in the state of the core block (1) and the end face (2) on the side in sliding contact with the medium is :ti11
After processing the core block with a large radius using a cylindrical grinder with #2000-#400o grains, the end face of the head chip on the medium sliding contact side is made by slicing the core block.
Public No. 9-172110? 17 (G11B5/187)
By performing tape lapping using a held polishing machine as shown in Figure 1, scratches caused by the above-mentioned cylindrical grinding machine or the like are removed and a medium sliding contact surface is formed.
しかしながら、上述の磁気ヘッドの場合、テープランプ
量が少ないと、第１５図に示すように媒体摺接面（６〉
には円筒研削機等の加工による傷（３）が残り、更には
媒体摺接側面（６）の表面状態（高低差）を表す干渉縞
（４）の長軸方向がテープ進行方向（イ）に対して大き
くずれているように、媒体摺接面（６）の曲面形状が磁
気ギャップ部（５）の両側で異なり、安定したテープ走
行を得ることができない。一方、テープラップ量が多く
なると媒体摺接面（６）は第１６図に示すように前述の
傷がほとんど無くなり、更には干渉縞（４）の長袖方向
がテープ進行方向（イ）と一致しているように媒体摺接
面（６）の曲面形状が磁気ギャップ部（５）の両側で略
等しくなる。しかしながら、この場と）においても、第
１７図に示すように再生出力のエンベロープ波形が前半
落ち込んだり、媒体摺（を面（６）の端部でテープを潟
付けるという問題がある。However, in the case of the above-mentioned magnetic head, if the tape ramp amount is small, as shown in FIG.
There are scratches (3) left by machining with a cylindrical grinder, etc., and the long axis direction of the interference fringes (4) representing the surface condition (height difference) of the side surface (6) in contact with the medium is in the tape traveling direction (A). The curved shape of the medium sliding contact surface (6) is different on both sides of the magnetic gap part (5) as shown by a large deviation from the magnetic gap part (5), making it impossible to obtain stable tape running. On the other hand, when the amount of tape wrap increases, the above-mentioned scratches almost disappear on the medium sliding contact surface (6) as shown in Fig. 16, and furthermore, the long direction of the interference fringes (4) coincides with the tape traveling direction (A). As shown, the curved shape of the medium sliding contact surface (6) is approximately equal on both sides of the magnetic gap portion (5). However, even in this case, as shown in FIG. 17, there are problems in that the envelope waveform of the reproduced output drops in the first half and that the tape is skewed at the edge of the surface (6) of the medium.
上述の問題点を解決する方法としては、例えば第１８図
に示すように媒体摺接面（６）の幅ｉをヘッドチップの
全幅ｍよりも小さくする方法がある。しかし、この場合
においては、媒体摺接面（６）の摩耗が激しく、ヘッド
の寿命が短くなる。One way to solve the above-mentioned problem is to make the width i of the medium sliding contact surface (6) smaller than the total width m of the head chip, as shown in FIG. 18, for example. However, in this case, the medium sliding contact surface (6) is severely worn and the life of the head is shortened.
特に、ＤＡＴのような磁気記録装置の場合、早送り、巻
戻し、サーチ等の特殊再生等を頻繁に行うためへ７ド寿
命の長いものが要求され、媒体慴４を面（６）の幅を小
さくすることは好ましくない。In particular, in the case of magnetic recording devices such as DAT, a device with a long service life is required because special playback such as fast forwarding, rewinding, and searching is frequently performed. It is not desirable to make it small.
（ハ）発明が解決しようとする課題
本発明は上記従来例の欠点に鑑みろされたもので−あり
、ヘッド寿命を低下させること無く、媒体摺接面の湯を
減少させるとともに媒体の走行性の悪化を防止すると共
に、更には再生出力のエンベロープ波形の乱れを防止し
た磁気ヘッド及びその製造方法を提供することを目的と
するものである。(c) Problems to be Solved by the Invention The present invention has been developed in view of the above-mentioned drawbacks of the conventional example, and it reduces the amount of hot water on the surface of the media sliding surface without reducing the life of the head, and improves the running performance of the media. It is an object of the present invention to provide a magnetic head and a method for manufacturing the same, which prevents the deterioration of the magnetic head and the disturbance of the envelope waveform of the reproduced output.
（ニ）課題を解決するための手段
本発明の磁気ヘッドは、磁気媒体と摺１妾する媒体摺接
面のうち磁気ギャップ部の周りを媒体進行方向及び媒体
進行方向と直行する方向に沿う方向、に曲面加工されて
いる第２の媒体摺接面で形成し、該第２の媒体摺接面の
周りを媒体進行方向及び媒体進行方向と直交する方向に
曲面加工され、且つ両方向の曲率半径が前記第２の媒体
摺接面より大きい第１の媒体摺接面で形成したことを特
徴とする。(d) Means for Solving the Problems The magnetic head of the present invention is designed to move around the magnetic gap part of the medium sliding contact surface that slides against the magnetic medium in a direction along the medium traveling direction and a direction perpendicular to the medium traveling direction. , a curved surface is formed around the second medium sliding contact surface in the medium traveling direction and a direction orthogonal to the medium traveling direction, and a radius of curvature in both directions is formed. is characterized in that the first medium sliding contact surface is larger than the second medium sliding contact surface.
また、本発明の磁気ヘッドの製造方法は、ヘントチツブ
の媒体慴接側の端面を所定量突出させて第１のテープラ
ップ加工を行い前記端面全域に第１の媒体摺接面を形成
した後、前記ヘッドチップの第１の媒体摺接面を前記第
１のテープラップ加工時の突出量よりも少なく突出させ
て第２のテープラップ加工を行い前記第１の媒体摺接面
内に第２の媒体摺接面を形成することによりテープラッ
プ加工を行うことを特徴とする。Further, in the method for manufacturing a magnetic head of the present invention, after the end face of the hent tip on the medium contacting side is protruded by a predetermined amount and a first tape wrapping process is performed to form a first medium sliding contact surface over the entire area of the end face, A second tape wrapping process is performed by causing the first medium sliding contact surface of the head chip to protrude by a smaller amount than the amount of protrusion during the first tape wrapping process, and a second medium sliding contact surface is formed within the first medium sliding contact surface. A feature is that tape wrapping is performed by forming a medium sliding contact surface.
（ホ〉 作 用
上記構造の磁気へンドによれば、媒体との摺接の初期状
態においては磁気ギャップ部のギヤノブ深さの減少と共
に媒体摺接面の媒体と接触している部分の面積は、媒体
の走行性が良好な状態を保ったまま大きくなり、ある程
度大きくな−）た状態で略一定となるため、ヘッド寿命
を短がくすること無く媒体の走行性は良好な状態を保つ
。(E) Effect According to the magnetic head of the above structure, in the initial state of sliding contact with the medium, the gear knob depth of the magnetic gap decreases and the area of the portion of the medium sliding contact surface that is in contact with the medium decreases. , the running performance of the medium increases while maintaining a good state, and becomes approximately constant after increasing to a certain extent, so that the running performance of the medium remains in a good state without shortening the life of the head.
（へ）実施例
以Ｆ、図面を参照しつつ本発明の一実施例を詳細に説明
する。(F) Embodiment An embodiment of the present invention will now be described in detail with reference to the drawings.
まず、本実施例の磁気へ／ドの製造方法について説明す
る。First, a method of manufacturing the magnetic head/dead of this embodiment will be explained.
本実施例では、まず、第１４図に示すように媒体摺接側
の端面（２）がコアブロックの幅方向（テープ進行方向
（イ）に沿って曲率半径３．５Ｍで大Ｒ付加工されたコ
アプロ７り（１）をスライスして厚み１．６Ｉ［ｌｆｆ
＋のヘッドチップをＰｉ数個形成し、そのうち１つをヘ
ッドベースに貼着した後、第４図及び第５図に示すよう
に前記へラドベース（７）をテープランプ装置の直径２
５ｍｍの回転シリンダ（８）に取付け、前記ヘッドチッ
プ（９）の媒体摺接側の端面（２）にラップテープ（１
０）を接触させた状態で前記回転シリンダ（８）を回転
させることにより第１のテープラップ加工を行い前記媒
体摺接側の端面（２）全域に第１の媒体摺接面（１１）
を形成する。In this example, first, as shown in FIG. 14, the end surface (2) on the side where the medium slides is machined with a large radius of curvature of 3.5M along the width direction of the core block (tape traveling direction (A)). Slice the core pro 7ri (1) to a thickness of 1.6I [lff
After forming several + head chips Pi and pasting one of them on the head base, the herad base (7) is attached to the tape lamp device with a diameter of 2
It is attached to a 5 mm rotary cylinder (8), and a wrap tape (1
A first tape wrapping process is performed by rotating the rotary cylinder (8) with the rotary cylinder (8) in contact with the first medium sliding contact surface (11) over the entire area of the end surface (2) on the medium sliding contact side.
form.
この第１のテープラップ加工では、第６図（ａ）（ｂ）
から判るように回転シリンダ（８）に対するヘッドチッ
プ（９）の突出量ａを大きくするとヘッドチップ（９）
の媒体摺接側の端面（２）はヘッドチップ（９）の厚み
方向くテープ進行方向と直交する方向（ロ））にＲ材加
工される。In this first tape wrapping process, Fig. 6(a)(b)
As can be seen from the figure, when the protrusion amount a of the head chip (9) with respect to the rotating cylinder (8) is increased, the head chip (9)
The end surface (2) on the medium sliding contact side is rounded in the thickness direction of the head chip (9) in the direction perpendicular to the tape traveling direction (b).
第７図は第１のテープラップ加工において、ヘッドチッ
プ（９）の突出量ａと大Ｒ付加工により形成された媒体
摺接側の端面（２）の曲率半径の変化量との関係を示す
図である。尚、この第７図はヘントチツブ（９）の磁気
ギャップ部のギャップ１朶さの減少量が５μｍになるま
で第１のテープラップ加工を行うことにより得た結果で
ある。この第７図から判るようにヘッドチップ（９）の
突出量ａを大きくして第１のテープラップ加工を行った
方が第１の媒体摺接面の曲率半径の変化量（増加ｔ）を
小さくすることができる。又、前述の突出量ａを大きく
した方が大Ｒ付加工時に媒体摺接側の端面（２）に発生
した陽を多く除去できることが判った。しかし乍ら、前
述の突出量ａを大きくし過ぎると、ヘッドチップ（９）
の端によるラッピンダテープの切れや、ヘッドチップ（
９）のへラドベース（７）からの離脱等の問題が生じる
。第８図はヘッドチップ（９）の突出量ａと上記問題に
よる歩留りとの関係を示す図であり、この図から判るよ
うにヘッドチップ（９）の突出ｉｌａが１２０μｎ〕を
越えると急激に歩留りは悪化する。本実施例では以上の
点を＃慮して、ヘッドチップ（９）の突出量ａを９０μ
ｍにして第１のテープラップ加工を行った。FIG. 7 shows the relationship between the protrusion amount a of the head chip (9) and the amount of change in the radius of curvature of the end surface (2) on the media sliding contact side formed by the large radius processing in the first tape wrapping process. It is a diagram. Note that FIG. 7 shows the results obtained by performing the first tape wrapping process until the amount of decrease in the gap thickness of the magnetic gap portion of the hent tip (9) was 5 μm. As can be seen from FIG. 7, the amount of change (increase t) in the radius of curvature of the first medium sliding surface can be reduced by increasing the protrusion amount a of the head chip (9) and performing the first tape wrapping process. Can be made smaller. Furthermore, it has been found that by increasing the above-mentioned protrusion amount a, more positives generated on the end surface (2) on the medium sliding contact side during the large radius machining can be removed. However, if the above-mentioned protrusion amount a is made too large, the head chip (9)
The wrapper tape may be cut due to the edge of the wrapping tape, or the head chip (
Problems such as separation of the base (9) from the helad base (7) occur. FIG. 8 is a diagram showing the relationship between the protrusion amount a of the head chip (9) and the yield due to the above problem. As can be seen from this figure, when the protrusion ila of the head chip (9) exceeds 120 μn, the yield sharply increases. gets worse. In this embodiment, taking the above points into consideration, the protrusion amount a of the head chip (9) is set to 90 μm.
The first tape wrapping process was performed at m.
第９図は上述の条件で第１のテープラ・Ｉプ加工を行っ
た時のテープラップ時間による媒体摺接面の干渉縞（４
）及び傷（３）の状態を示す図である。この第９図から
判るようにテープラップ時間が（ａ）５秒の場合、（ｂ
）１０秒の場合では、干渉縞（４）の長袖方向がテープ
進行方向（イ）に対して大きくずれ、しかも第１の曲面
加工時に発生した傷（３）が多数残っているのに対して
、テープラップ時間が（ｃ）２０秒の場合では、干渉縞
（４）の長袖方向がテープ進行方向（イ）と略一致する
と共に磁気ギャップ部（５）近傍部における前述の傷は
ほとんど無くなった。Figure 9 shows the interference fringes (4
) and the state of scratch (3). As can be seen from Fig. 9, when the tape wrap time is (a) 5 seconds, (b)
) In the case of 10 seconds, the long sleeve direction of interference fringes (4) deviates greatly from the tape traveling direction (a), and many scratches (3) that occurred during the first curved surface processing remain. When the tape wrap time (c) is 20 seconds, the long direction of the interference fringes (4) almost coincides with the tape traveling direction (a), and the aforementioned scratches near the magnetic gap (5) have almost disappeared. .
この第１のテープラップ加工により形成されたヘントチ
ツブ（９）の第１の媒体摺接面（１１）は、第１０図の
側面図に示すようにテープ進行方向と直交する方向（ロ
）にも曲面状をなし、その曲率半径は０．６ｍｍである
。また、前記第１の媒体摺接面（１１）のテープ進行方
向（イ）の曲率半径は第１のテープラップ加工により加
工前の状態がら約１０％増加して３．３５ｍｍとなる。The first medium sliding contact surface (11) of the hent tip (9) formed by this first tape wrapping process also extends in the direction (b) perpendicular to the tape traveling direction, as shown in the side view of FIG. It has a curved surface shape, and its radius of curvature is 0.6 mm. Furthermore, the radius of curvature of the first medium sliding contact surface (11) in the tape traveling direction (a) increases by about 10% from the state before processing due to the first tape wrapping process to 3.35 mm.
次に、本実施例では第１のテープラップ加工により形成
したヘッドチップ（９）の第１の媒体摺接面（１１）に
第２のテープラップ加工を施す。この第２のテープラッ
プ加工では、前述の第１のテープラップ加工と同様に第
４図及び第５図に示すテープラップ装置を用いて、へｌ
トチツブ（９）の突出量ａが４０μｍの条件で第１の媒
体摺接面（１１）にテープラップを施す二とに前記第１
の媒体摺接面（１］）内の磁気ギャップ部（５）の周り
に第２の媒体摺接面０２）を形成する。この第３の曲面
加工で使用するランプテープ（１０）の砥粒は＃ １．
００００〜：：１２ｏｏｏ程度のらのである。Next, in this embodiment, a second tape wrapping process is performed on the first medium sliding contact surface (11) of the head chip (9) formed by the first tape wrapping process. In this second tape wrapping process, similarly to the first tape wrapping process described above, the tape wrapping apparatus shown in FIGS. 4 and 5 is used.
Tape wrap is applied to the first medium sliding contact surface (11) under the condition that the protrusion amount a of the top tip (9) is 40 μm.
A second medium sliding contact surface 02) is formed around the magnetic gap portion (5) in the medium sliding contact surface (1]). The abrasive grain of the lamp tape (10) used in this third curved surface processing is #1.
It is about 0000~::12ooo.
第１１図は第２のテープラップ加工後のへｌトチツブ（
９）の側面図であり、媒体摺接面の最上部は第２の媒体
摺Ｊ＆面（１２）が形成されている。第１２図はへ７ド
チンプ（９）の突出量ａが４０μｍで第２のテープラッ
プ加工を行った時のラップ加工時間と第１Ｉ図に示す第
２の媒体摺接面（１２）の幅すとの関係を示す図であり
、本実施例では２０秒のランプ加工を行い幅すが約７０
μｍ、テープ進行方向と直交する方向（ロ）の曲率半径
が１．５１′［ｌｃａである第２の媒体摺接面（１２）
を形成した。尚、前記第２の媒体摺接面（１２）のテー
プ進行方向（イ）の曲率半径は、第２のテープランプ加
工により加工前の状態から約４０九増加して５．４ｍｍ
となる。Figure 11 shows the bottom tip after the second tape wrapping process (
9), a second medium sliding J& surface (12) is formed at the top of the medium sliding surface. Figure 12 shows the lapping time and the width of the second medium sliding contact surface (12) shown in Figure 1I when the second tape lapping process was performed with the protrusion amount a of the hemi-7 do chimp (9) being 40 μm. In this example, the width is approximately 70 mm after 20 seconds of ramp processing.
μm, and the radius of curvature in the direction (b) perpendicular to the tape traveling direction is 1.51'[lca].
was formed. The radius of curvature of the second medium sliding contact surface (12) in the tape traveling direction (A) is 5.4 mm, which is increased by about 409 mm from the state before processing due to the second tape ramp processing.
becomes.
以上の工程により本実施例の磁気ヘッドは完成する。Through the above steps, the magnetic head of this embodiment is completed.
第１図は以上の工程により形成された本実施例の磁気ヘ
ッドの媒体摺接面を示す図、第２図は第１図のＡ−Ａ’
断面図、第３図は第１図のＢ−Ｂ°断面図である。FIG. 1 is a diagram showing the medium sliding contact surface of the magnetic head of this embodiment formed by the above steps, and FIG. 2 is a diagram showing the A-A' in FIG.
The sectional view, FIG. 3, is a sectional view taken along the line B-B° in FIG.
第１図〜第３図より判るように本実施例の磁気ヘッドの
媒体摺接面は、磁気ギャップ部（５）の周りに第２の媒
体摺接面（Ｉ２）を有し、該第２の媒体慴接面（１２）
の周りに第１の媒体摺接面（１１）を有している。前記
第１の媒体摺ｆ？面（１１）及び＠２の媒体摺接面（１
２）の寸法は第１図に示す通りである。As can be seen from FIGS. 1 to 3, the medium sliding contact surface of the magnetic head of this embodiment has a second medium sliding contact surface (I2) around the magnetic gap part (5). media interface (12)
It has a first medium sliding contact surface (11) around it. Said first medium sliding f? Surface (11) and @2 media sliding surface (1
The dimensions of 2) are as shown in FIG.
即ち、本実施例の磁気ヘッドの媒体摺接面をＨ！を戊す
る曲面形状は、テープ進行方向（イ）においては、第２
図に示すように磁気ギャップ部（５）を有する中央部分
（１３）の曲率半径は５．４碓であり、該中央部分（１
３）の両側に連続して形成された両側部分（１４）（１
４）の曲率半径は３．８５μｍであり、前記中央部分（
１３）の曲率半径より小さい。又、前記媒体摺接面を構
成する曲面形状は、テープ進行方向と１宜交する方向（
ロ）においては、第３図に示すように磁気ギヤノブ部（
５）を有する中央部分り１５）の曲率半径はｌ、５ｍｍ
であり、該中央部分（１５）の両側に連続して形成され
た両側部分（１６）（１６）の曲率半径はＱ、５ｍｍで
あり、前記中央部分（１５）の曲率半径より小さい。尚
、前記中央部分（＋３）（１５）が前記？Ｊ２の媒体摺
接面（１２）より戊り、Ｍｉｊ ３ｅ 両側部分（１４
）（１４）（１６）（１６）カ前記’Ｉ １ （７）ｂ
Ｘ（４”慴接面（１１）よｌ）成ることは言うまでもな
い。That is, the medium sliding contact surface of the magnetic head of this embodiment is H! In the tape traveling direction (A), the curved shape that cuts the second
As shown in the figure, the radius of curvature of the central portion (13) having the magnetic gap portion (5) is 5.4 mm.
3) both sides (14) continuously formed on both sides of (1)
4) has a radius of curvature of 3.85 μm, and the central portion (
13) is smaller than the radius of curvature. Further, the curved shape constituting the medium sliding contact surface is arranged in a direction perpendicular to the tape traveling direction (
(b), the magnetic gear knob part (
The radius of curvature of the central portion 15) with 5) is l, 5 mm
The radius of curvature of both side portions (16) (16) continuously formed on both sides of the central portion (15) is Q, 5 mm, which is smaller than the radius of curvature of the central portion (15). In addition, the central part (+3) (15) is the same as the above? Cut from the medium sliding contact surface (12) of J2, Mij 3e both side parts (14
)(14)(16)(16)Ka'I 1 (7)b
It goes without saying that X (4" x 11).
第１３図は従来の磁気ヘッドと本実施例の磁気へノドと
を用いてＲ−ＤＡＴ用のＲＦ信号を自己録再した時のエ
ンベロープ波形を示す図である。FIG. 13 is a diagram showing an envelope waveform when an RF signal for R-DAT is self-recorded and reproduced using the conventional magnetic head and the magnetic head of this embodiment.
この第１３図から判るように本実施例の磁気ヘッドを用
いて自己録再した場合、従来の如く前半に落ち込んだす
せず、全般にわたって略平坦である良好なエンベロープ
波形を得ることができる。しかも、この磁気へノドは、
媒体摺接面の全幅が０、’０８ｍａ＋と大きく、耐摩耗
性の点でも優れている。As can be seen from FIG. 13, when the magnetic head of this embodiment is used for self-recording and reproducing, it is possible to obtain a good envelope waveform that is generally flat throughout, rather than having a dip in the first half as in the conventional case. Moreover, this magnetic node is
The total width of the media sliding contact surface is as large as 0.08 m, and it is also excellent in wear resistance.
又、上述の製造方法によれば、テープラップ加工の際の
ヘッドチップ（９）の突出量ａを変えて２回のテープラ
ップ加工を行うだけで上述した如く耐摩耗性を劣化させ
ることなくテープ走行を安定させた磁気ヘッドを製造す
ることができ、量産性にも適している。しかも、上述の
製造方法によれば、第１のテープラ・ツブ加工により大
Ｒ付加工により発生した媒体摺接面の傷はほとんど除去
される。Furthermore, according to the above manufacturing method, the tape wrapping process can be performed only twice by changing the protrusion amount a of the head chip (9) during the tape wrapping process, without deteriorating the wear resistance as described above. It is possible to manufacture a magnetic head with stable running, and it is suitable for mass production. Furthermore, according to the above-described manufacturing method, most of the scratches on the medium sliding contact surface caused by the large radius processing are removed by the first tapering/tubing process.
尚、本発明は第１８図に示すように溝加工を施すことに
より媒体摺接面の幅をヘノトチ・ツブの全幅よりも小さ
くした磁気へ７ドにおいても適用できることは言うまで
もない。It goes without saying that the present invention can also be applied to a magnetic field in which the width of the medium sliding contact surface is made smaller than the total width of the tip tip by forming grooves as shown in FIG.
（ト）発明の効果
本発明によれば、ヘッド寿命を低下させることなく媒体
の走行を安定した状態に保ち、再生特性を良好にした磁
気ヘッドを提供し得る。(G) Effects of the Invention According to the present invention, it is possible to provide a magnetic head that maintains stable running of the medium without reducing the life of the head and has improved reproduction characteristics.
又、本発明によれば、上述の磁気ヘッドを量産性良く製
造でき、且つ、媒体摺接面の傷をはとんど除去すること
ができる磁気ヘッドの製造方法を提供し得る。Further, according to the present invention, it is possible to provide a method for manufacturing a magnetic head, which allows the above-described magnetic head to be manufactured with good mass productivity, and which can almost eliminate scratches on the surface where the medium slides.
第１図乃至第１４図は本発明に係り、１１図は磁気ヘッ
ドの媒（＊摺接面そ示す平面図、第２図は第１図のＡ
−Ａ ’ 断面図、第３図は第１図のＢ−■３°断面図
、第４図はテープランプ装置の側面図、第５図はテープ
ラップ装置の上面図、第６ ｔｍはテープランプ加Ｅの
状態を示す断面図、第７図はヘンドチンブの突出量によ
る媒体摺接面の変化を示す図、第８図はへ７ドチツプの
突出量による歩留りの変化を示す図、第９図は媒体摺接
面の状態を示す図、第１０図及び第１１図は夫々ヘッド
チップの側面図、第１２図はラップ加工時間による第２
の媒体摺接面の輻の変化を示す図、第１３図ハ再生出力
のエンベロープ波形を示す図、第１４図はコアブロンク
を示す斜視図である。第１５図乃至第１８図は従来例に
係り、第■５図及び第１６図は夫々媒体摺接面の状態を
示す図、第１７図は再生出力のエンベロープ波形を示す
図、第１８図はヘッドチップの側面図である。
（２）・・・媒体摺接側の端面、（５）・・・磁気ギャ
ップ部、（８）・・・回転シリンダ、（９）・・・ヘッ
ドチンプ、（１０）・・・ラップテープ、（１１）・・
・第１の媒体摺接面、（１２）・・・第２の媒体摺接面
。1 to 14 relate to the present invention, FIG. 11 is a plan view showing the medium (*sliding surface) of the magnetic head, and FIG.
-A' sectional view, Figure 3 is a 3° cross-sectional view of B-■ in Figure 1, Figure 4 is a side view of the tape lamp device, Figure 5 is a top view of the tape wrap device, and 6th tm is the tape lamp. 7 is a diagram showing changes in the medium sliding contact surface depending on the amount of protrusion of the tip. FIG. 8 is a diagram showing changes in yield depending on the amount of protrusion of the tip. FIG. Figures 10 and 11 are side views of the head chip, respectively, and Figure 12 is a diagram showing the state of the media sliding contact surface.
FIG. 13C is a diagram showing the envelope waveform of the reproduced output, and FIG. 14 is a perspective view showing the core bronc. 15 to 18 relate to the conventional example, FIG. FIG. 3 is a side view of the head chip. (2)... End surface on the side where the medium slides, (5)... Magnetic gap portion, (8)... Rotating cylinder, (9)... Head chimp, (10)... Wrap tape, ( 11)...
- First medium sliding contact surface, (12)...second medium sliding contact surface.
Claims (2)
プ部の周りを媒体進行方向及び媒体進行方向と直行する
方向に沿う方向に曲面加工されている第２の媒体摺接面
で形成し、該第２の媒体摺接面の周りを媒体進行方向及
び媒体進行方向と直交する方向に曲面加工され、且つ両
方向の曲率半径が前記第２の媒体摺接面より大きい第１
の媒体摺接面で形成したことを特徴とする磁気ヘッド。(1) Among the medium sliding contact surfaces that make sliding contact with the magnetic medium, the area around the magnetic gap portion is formed by a second medium sliding contact surface that is curved in a direction along the medium traveling direction and a direction perpendicular to the medium traveling direction. , the second medium sliding contact surface is curved in the medium traveling direction and the direction orthogonal to the medium traveling direction, and the radius of curvature in both directions is larger than the second medium sliding contact surface.
What is claimed is: 1. A magnetic head characterized in that it is formed with a surface in sliding contact with a medium.
進行方向に沿って大Ｒ付加工されているヘッドチップを
形成した後、前記ヘッドチップを媒体摺接側の端面が突
出するように回転シリンダに装着し、前記媒体摺接側の
端面とラップテープとを接触させた状態で前記回転シリ
ンダを回転させることにより前記端面にテープラップ加
工を施して媒体摺接面を形成する磁気ヘッドの製造方法
において、前記テープラップ加工を、ヘッドチップの媒
体摺接側の端面を所定量突出させて第１のテープラップ
加工を行い前記端面全域に第１の媒体摺接面を形成した
後、前記ヘッドチップの第１の媒体摺接面を前記第１の
テープラップ加工時の突出量よりも少なく突出させて第
２のテープラップ加工を行い前記第１の媒体摺接面内に
第２の媒体摺接面を形成することにより行うことを特徴
とする磁気ヘッドの製造方法。(2) After forming a head chip whose end face on the side in sliding contact with the medium having a magnetic gap part is processed with a large radius along the medium traveling direction, the head chip is formed so that the end face on the side in sliding contact with the medium protrudes. A magnetic head is mounted on a rotating cylinder, and the rotating cylinder is rotated with the end surface on the medium sliding contact side in contact with a wrap tape, thereby performing tape wrapping on the end surface to form a medium sliding contact surface. In the manufacturing method, the tape wrapping process is performed by causing the end surface of the head chip on the medium sliding contact side to protrude by a predetermined amount and performing the first tape wrapping process to form a first medium sliding contact surface over the entire area of the end surface, and then A second tape wrapping process is performed by causing the first medium sliding contact surface of the head chip to protrude by a smaller amount than the amount of protrusion during the first tape wrapping process, and a second medium is placed within the first medium sliding contact surface. A method for manufacturing a magnetic head, characterized in that the method is performed by forming a sliding surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18089689A JP2902671B2 (en) | 1989-07-12 | 1989-07-12 | Manufacturing method of magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18089689A JP2902671B2 (en) | 1989-07-12 | 1989-07-12 | Manufacturing method of magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0344805A true JPH0344805A (en) | 1991-02-26 |
| JP2902671B2 JP2902671B2 (en) | 1999-06-07 |
Family
ID=16091215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18089689A Expired - Fee Related JP2902671B2 (en) | 1989-07-12 | 1989-07-12 | Manufacturing method of magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2902671B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6023396A (en) * | 1997-12-23 | 2000-02-08 | Ampex Corporation | Magnetic head tip design to reduce dynamic spacing loss and improve signal quality in high-density helical scanning system |
-
1989
- 1989-07-12 JP JP18089689A patent/JP2902671B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6023396A (en) * | 1997-12-23 | 2000-02-08 | Ampex Corporation | Magnetic head tip design to reduce dynamic spacing loss and improve signal quality in high-density helical scanning system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2902671B2 (en) | 1999-06-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |