JPH03119506A - Magnetic head and production thereof - Google Patents
Magnetic head and production thereofInfo
- Publication number
- JPH03119506A JPH03119506A JP25650189A JP25650189A JPH03119506A JP H03119506 A JPH03119506 A JP H03119506A JP 25650189 A JP25650189 A JP 25650189A JP 25650189 A JP25650189 A JP 25650189A JP H03119506 A JPH03119506 A JP H03119506A
- Authority
- JP
- Japan
- Prior art keywords
- sliding contact
- core
- radius
- media
- curvature
- 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
- 230000005291 magnetic effect Effects 0.000 title claims description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000005520 cutting process Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 239000003302 ferromagnetic material Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000011295 pitch Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁気ヘッド及びその製造方法に関し、詳しくは
ダブルアジマスヘッドや4ヘツドを有するVTR装置な
どに使用され、2個のコアチップを並べて近接させた状
態でヘッドベースに載置固定した磁気ヘッド及びその製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head and a method for manufacturing the same, and more specifically, it is used in a double azimuth head, a VTR device having four heads, etc., in which two core chips are placed side by side and close to each other. The present invention relates to a magnetic head mounted and fixed on a head base in a state in which the magnetic head is mounted and fixed, and a method for manufacturing the same.
〔従来の技術]
ダブルアジマスヘッドや4ヘツドを有するVTR装置に
使用される磁気ヘッドは、第9図乃至第11図に示すよ
うに金属製のヘッドベース(1)の先端部(1a)に、
2個のコアチップ(2)(2)を並べて近接させた状態
で接着剤などにより載置固定したものである。上記コア
チップ(2)(2)には、図示しないが、線材が所定タ
ーン数ずつ巻回され、夫々の端部がヘッドベース(1)
上のプリント配線体に半田接続される。そして、この磁
気ヘッドは、上記ヘッドベース(1)の基端部に穿設さ
れた取付孔(3)を利用してVTR装置の回転ドラムに
組付けられる。[Prior Art] A magnetic head used in a VTR device having a double azimuth head or four heads has a metal head base (1) with a tip (1a) attached to it, as shown in FIGS. 9 to 11.
Two core chips (2) (2) are arranged and placed and fixed in close proximity using an adhesive or the like. Although not shown, a wire is wound around the core chips (2) (2) by a predetermined number of turns, and each end is connected to the head base (1).
It is soldered to the printed wiring body above. Then, this magnetic head is assembled to a rotating drum of a VTR device using a mounting hole (3) formed in the base end of the head base (1).
次に、上記ヘッドベース(1)に取付けられたコアチッ
プ(2)(2)を具体的に説明する。この2つのコアチ
ップ(2)(2)は、磁気ギャップのアジマス角度やト
ラック幅を除いて同一構造であるので、以下1つのコア
チップ(2)について詳述すると、第12図乃至第14
図に示すようにフェライト等の強磁性体からなる一対の
コア(4)(5)をガラス(6)(7)(7)で接合一
体膜し、その頂端面である媒体摺接面(8)に所定のア
ジマス角啓及びトラック幅を有する磁気ギャップgを形
成する。上記媒体摺接面(8)は、磁気記録媒体である
磁気テープが滑らかに摺動するために1曲面加工され、
更に、コアチップ(2)<2);bヘッドベース(1)
に取付けた際に相互に対向するエツジ部(9)には、欠
は等のチッピングを防止するためにC面取り(10)が
施されている。尚、図中(11)は巻線挿通孔である。Next, the core chips (2) (2) attached to the head base (1) will be specifically explained. These two core chips (2) (2) have the same structure except for the azimuth angle of the magnetic gap and the track width.
As shown in the figure, a pair of cores (4) (5) made of ferrite or other ferromagnetic material are integrally bonded with glass (6) (7) (7), and the medium sliding contact surface (8 ) is formed with a magnetic gap g having a predetermined azimuth angle and track width. The medium sliding contact surface (8) is processed into a single curved surface so that the magnetic tape, which is a magnetic recording medium, slides smoothly.
Furthermore, core chip (2) <2); b head base (1)
The edge portions (9) that face each other when attached to the frame are chamfered (10) to prevent chipping. In addition, (11) in the figure is a winding insertion hole.
上記コアチップ(2)は、第15図乃至第18図に示す
各工程を経て製造される。まず、第15図に示すように
フェライト等の強磁性体からなる直方体形状の一対のコ
アブロック(12) (13)を用意する。そして、
第16図に示すように上記コアブロック(12) (
13)の内側面のエツジ部に所定のトラック幅を残して
複数のトラック溝(14)・・・(15)・・・を切削
加工すると共に、上記各内側面の中央と下部に巻線挿通
孔となる凹溝(16)及び接合用V溝(17)を切削加
工し、上記トラック溝(14)・・・(15)・・・及
びV溝(17)をガラスモールドする。次に、第17図
に示すように両コアブロック(12) (13)をギ
ャップスペーサとなる5i0□等の非磁性′体膜(図示
せず)を介して突合わせて加熱し接召一体化する。そし
て第18図□に示すように接合一体膜されたコアブロッ
ク(12) (13)の頂端面を曲面研磨して媒体摺
接面(18)を形成し、更にその一方のエツジ部の長手
方向に沿ってC面取り(19)を施す。最後に上記コア
ブロック(12) (13)を所定のアジマス角度で
もって定ピツチごとにスライスして第12図に示すコア
チップ(2)を得る。The core chip (2) is manufactured through the steps shown in FIGS. 15 to 18. First, as shown in FIG. 15, a pair of rectangular parallelepiped core blocks (12) and (13) made of a ferromagnetic material such as ferrite are prepared. and,
As shown in FIG. 16, the core block (12) (
A plurality of track grooves (14), (15), etc. are cut leaving a predetermined track width at the edge portion of the inner surface of 13), and the winding is inserted into the center and bottom of each inner surface. A concave groove (16) serving as a hole and a V-groove (17) for bonding are cut, and the track grooves (14)...(15)... and V-groove (17) are molded with glass. Next, as shown in Fig. 17, both core blocks (12) and (13) are butted together with a non-magnetic film (not shown) such as 5i0□ serving as a gap spacer interposed therebetween and heated to join them together. do. Then, as shown in FIG. 18 □, the top end surfaces of the core blocks (12) and (13), which have been bonded and integrally coated, are curved and polished to form a media sliding surface (18). Apply C chamfering (19) along. Finally, the core blocks (12) and (13) are sliced at regular pitches at a predetermined azimuth angle to obtain core chips (2) shown in FIG.
ところで、上述した磁気ヘッドでは、1つのヘッドベー
ス(1)に2個のコアチップ(2)(2)を並べて近接
させた状態で配置しているため、コアチップ(2)(2
)の媒体摺接面(8)(8)に対して磁気テープを走行
させた状態で情報の書込み及び読出しを行う際に、コア
チップ(2)(2)の近接する対向エツジ部(9)(9
)が磁気ギャップgと平行であるために疑似ギャップと
なり、磁気ヘッドの再生出力に疑似パルスが発生して良
好な出力特性が得にくいという問題があった。By the way, in the magnetic head described above, since the two core chips (2) (2) are arranged side by side and close to each other on one head base (1), the core chips (2) (2)
) When writing and reading information with the magnetic tape running against the medium sliding contact surfaces (8) (8) of the core chips (2) (2), the opposing edges (9) ( 9
) is parallel to the magnetic gap g, resulting in a pseudo gap, causing a problem in that pseudo pulses are generated in the reproduction output of the magnetic head, making it difficult to obtain good output characteristics.
そこで、本発明は上記問題点に鑑みて提案されたもので
、その目的とするところは、簡便な(5)
手段にてコアチップの近接する対向エツジ部が疑似ギャ
ップとならないようにした磁気ヘッド及びその製造方法
を提供することにある。Therefore, the present invention has been proposed in view of the above problems, and its object is to provide a magnetic head and a magnetic head in which the adjacent opposing edge portions of the core chip do not form a pseudo gap by simple means (5). The object of the present invention is to provide a manufacturing method thereof.
本発明における上記目的を達成するための技術的手段は
、強磁性体からなる一対のコアを接合一体膜してその媒
体摺接面に磁気ギャップを形成したコアチップを2個並
べて近接させた状態でヘッドベースに載置固定したもの
において、上記各コアチップの媒体摺接面の対向エツジ
部を、媒体摺接幅の1/5以上で媒体摺接幅のA以下に
規制された曲率半径を持つ曲面形状とした磁気ヘッドで
ある。The technical means for achieving the above object of the present invention is to arrange two core chips in which a pair of cores made of ferromagnetic material are bonded into an integral film, and a magnetic gap is formed on the surface in contact with the medium, and the two core chips are placed side by side and close to each other. When mounted and fixed on the head base, the opposing edges of the medium sliding contact surfaces of each of the core chips are curved surfaces with a radius of curvature that is regulated to be 1/5 or more of the medium sliding contact width and less than A of the medium sliding contact width. This is a shaped magnetic head.
また、この磁気ヘッドの製造方法は、ヘッドベースに2
個並べて近接させた状態で載置固定される磁気ヘッドの
コアチップを製造するに際し、強磁性体からなる直方体
形状の一対のコアブロックをギャップスペーサとなる非
磁性体膜を介して突合わせてガラスで接合一体膜した後
、その接合一体膜されたコアブロックの媒体摺(6)
接面の長手方向に沿うエツジ部を、コアチップの媒体摺
接幅のに以上で媒体摺接幅のA以下に規制された曲率半
径の切削曲面を有するブレードでコアチップ単位ごとに
切削加工するようにしたことを特徴とする。In addition, this method of manufacturing a magnetic head includes two parts on the head base.
When manufacturing core chips for magnetic heads that are placed and fixed in close proximity to each other, a pair of rectangular parallelepiped core blocks made of ferromagnetic material are butted together with a non-magnetic film serving as a gap spacer interposed therebetween. After the bonded integral film is applied, the edge portion along the longitudinal direction of the media sliding (6) contact surface of the core block coated with the bonded integral film is regulated to be at least the media sliding width of the core chip and less than the media sliding width A. The present invention is characterized in that each core chip is cut by a blade having a cutting surface with a radius of curvature.
本発明に係る磁気ヘッドでは、コアチップの対向エツジ
部を媒体摺接幅の1/5以上で媒体摺接幅の2以下の曲
率半径を持つ曲面形状としたから、コアチップの媒体摺
接面に対して走行する磁気記録媒体との情報の書込み及
び読出し時、上記コアチップの対向エツジ部が磁気ギャ
ップとは非平行であるので疑似ギャップとならない。In the magnetic head according to the present invention, since the opposing edge portions of the core chip have a curved surface shape with a radius of curvature of 1/5 or more of the medium sliding contact width and 2 or less of the medium sliding contact width, When writing and reading information to and from a magnetic recording medium that runs along the magnetic recording medium, a pseudo gap does not occur because the opposing edge portions of the core chip are non-parallel to the magnetic gap.
また、上記コアチップの対向エツジ部は、上述した曲率
半径を持つ切削曲面を有するブレードにより、簡単な手
段にて曲面形成できる。Further, the facing edge portions of the core chip can be formed into curved surfaces by a simple means using a blade having a cutting curved surface having the above-mentioned radius of curvature.
本発明\に係る磁気ヘッド及びその製造方法の一実施例
゛を第1図乃至第8図を参照しながら説明する。尚、第
9図乃至第181図と同一、又は相当部分には同一参照
符号を附して重複説明は省略する。An embodiment of a magnetic head and a method for manufacturing the same according to the present invention will be described with reference to FIGS. 1 to 8. Note that the same or corresponding parts as in FIGS. 9 to 181 are given the same reference numerals, and redundant explanation will be omitted.
本発明の特徴はコアチップ(2)(2,)の媒体摺接面
(8)(8)の対向エツジ部(9)(9)の形状及びそ
の形成方法にある。具体的に説明すると、第1図乃至第
5図に示すように1つのヘッドベース(1)に並べて近
接させた状態で取付けられる2個のコアチップ(2)(
2)の媒体摺接面(8)(8)の対向エツジ部(9)(
9)を、媒体摺接幅(1)の1/5以上で媒体摺接幅(
1)の2以下に規制された曲率半径を持つ曲面形状(m
)(m)にする。The feature of the present invention lies in the shape of the opposed edge portions (9) (9) of the medium sliding contact surfaces (8) (8) of the core chips (2) (2,) and the method of forming the same. Specifically, as shown in FIGS. 1 to 5, two core chips (2) (
2) of the media sliding contact surface (8) (8) facing edge portion (9) (
9), the media sliding contact width (1) is 1/5 or more of the media sliding contact width (1).
1) A curved surface shape (m
)(m).
ここで、上記曲率半径が媒体摺接幅(1)の4よりも小
さいと、後述するブレードによる曲面形成が難しくなり
、不所望部分に嬰削残りが生じてこれを除去するために
後工程で・テープラップを付加しなければならなくなっ
て作業が煩雑になる虞がある”。また曲率1半径が媒体
−接幅(1)の%よりも大きくなると、曲率が小恐くな
り過ぎて従来品(比較してもそφ差が小、さくなって対
向エツジ部(a)(a)が磁気ギャップと平行な状態に
近づいてしまい、疑似ギャップとなる戊がある。以上の
理由から、対向エツジ部<9)(9)を、上述したよう
な範囲に規制された曲率半径を持つ曲面形状(m)(m
)にすれば、上記コアチップ(2)(2)をヘッドベー
ス(1)上に並べて近接させた状態で取付けた場合、コ
アチップ(2)(2)の媒体摺接面(8)(8)に対し
て磁気テープを走行させて情報の書込み及び読出しを行
う際に、コアチップ(2)(2)の対向エツジ部(9)
(9)が磁気ギャップgと非平行となって疑似ギャップ
となることはない。Here, if the radius of curvature is smaller than 4 of the medium sliding width (1), it will be difficult to form a curved surface using the blade, which will be described later.・There is a risk that it will be necessary to add tape wrap, which will complicate the work. Also, if the curvature 1 radius is larger than the media-tangential width (1)%, the curvature will become too small and the conventional product ( Even when compared, the φ difference becomes small, and the opposing edge portions (a) (a) approach a state parallel to the magnetic gap, resulting in a pseudo gap.For the above reasons, the opposing edge portion < 9) (9) is converted into a curved surface shape (m) (m
), when the core chips (2) (2) are mounted on the head base (1) in close proximity to each other, the media sliding contact surfaces (8) (8) of the core chips (2) (2) When writing and reading information by running a magnetic tape, the opposing edge portion (9) of the core chip (2) (2)
(9) will not be non-parallel to the magnetic gap g and will not become a pseudo gap.
次に上記コアチップ(2)(2)の対向エツジ部(9)
(9)での曲面形成を磁気ヘッドの製造方法に基づいて
第6図乃至第8図を参照しながら説明する。Next, the opposing edge part (9) of the core chip (2) (2)
The curved surface formation in (9) will be explained based on the method of manufacturing a magnetic head with reference to FIGS. 6 to 8.
まず、従来製法と同様にして第6図に示すように一対の
コアブロック(12,) (13)をギャップスベー
ザとなるSin、等の非磁性体膜(図示せ(9)
ず)を介して突合わせて接合一体膜する。その後、第7
図に示すようにその頂端面を曲面研磨して媒体摺接面(
18)を形成し、コアチップ(2)の媒体摺接幅(1)
の1/5以上で媒体摺接幅(1)のA以下に規制された
曲率半径の切削曲面(20)を有するブレード(21)
を、コアブロック(12) (13)の一方のエツジ
部(22)に斜め上方から対向配置させる。この状態か
ら上記ブレード(21)をコアブロック(12) (
13)に接近させて、第8図に示すように上記エツジ部
(22)をブレード(21)の切削曲面(20)で切
削加工して曲面形状(m)を形成し、ブレード(21)
をコアブロック(12) (13)の長手方向に定ピ
ツチ、即ちコアチップ単位ごとに移動させながら上述し
た切削加工を施す。その後、上記コアブロック(12)
(13)を所定のアジマス角度をかけて定ピツチで
スライスすることにより第3図に示すコアチップ(2)
を得る。First, a pair of core blocks (12,) (13) are coated with a non-magnetic film (not shown (9)) such as Sin, which serves as a gap substrate, as in the conventional manufacturing method, as shown in Figure 6. They are butted together to form an integral membrane. Then the seventh
As shown in the figure, the top end surface is polished into a curved surface and the media sliding contact surface (
18) and the medium sliding contact width (1) of the core chip (2)
A blade (21) having a cutting surface (20) with a radius of curvature that is regulated to be 1/5 or more of A and less than A of the media sliding width (1).
are arranged opposite to one edge portion (22) of the core blocks (12) (13) from diagonally above. From this state, move the blade (21) to the core block (12) (
13), cut the edge portion (22) with the cutting curved surface (20) of the blade (21) to form a curved surface shape (m) as shown in FIG.
The above-mentioned cutting process is performed while moving the core blocks (12) (13) in the longitudinal direction at a fixed pitch, that is, in units of core chips. After that, the above core block (12)
The core chip (2) shown in Fig. 3 is obtained by slicing (13) at a predetermined pitch at a predetermined azimuth angle.
get.
本発明によれば、コアチップの媒体摺接面の(10)
対向エツジ部を、媒体摺接幅の1/5以上で媒体摺接幅
の2以下に規制された曲率半径を持つ曲面形状としたか
ら、上記媒体摺接面に対して磁気記録媒体を走行させて
情報の書込み及び読出しを行うに際して、上記対向エツ
ジ部が磁気ギャップに対して非平行となるため、疑似ギ
ャップとなることなく、再生出力に疑似パルスが発生す
ることもないので良好な出力特性が得られて良品質で信
頼性の高い磁気ヘッドを提供できる。また、上記コアチ
ップの対向エツジ部は、媒体摺接幅の1/5以上で媒体
摺接幅の2以下に規制された曲率半径の切削曲面を持つ
ブl/−ドで曲面形成できるので、簡単な手段によりそ
の製作が容易である。According to the present invention, the (10) opposing edge portion of the medium sliding contact surface of the core chip has a curved shape with a radius of curvature restricted to 1/5 or more of the medium sliding contact width and 2 or less of the medium sliding width. Therefore, when writing and reading information by running the magnetic recording medium against the sliding contact surface of the medium, the opposing edge portions become non-parallel to the magnetic gap, so there is no pseudo-gap, and reproduction is possible. Since no spurious pulses are generated in the output, good output characteristics can be obtained and a high quality and highly reliable magnetic head can be provided. In addition, the opposing edges of the core chip can be easily formed with a blade having a cutting curved surface with a radius of curvature that is regulated to be 1/5 or more of the medium sliding contact width and 2 or less of the medium sliding contact width. It is easy to manufacture by suitable means.
第1図は本発明に係る磁気ヘッドの一実施例を示す要部
拡大平面図、第2図は一第1図の正面図、第3,1°図
は第1図のコアチップ妄示す斜視図、第4図、・tま第
3図の正面図、第(5図は第3図の平面図、第6図乃至
第8図は本へ明に係る磁気ヘッドの製造方法を説明する
ためのコアブロックを示す各斜視図である。
第9図は磁気ヘッドの従来例を示す斜視図、第10図は
第9図の要部拡大正面図、第11図は第10図の平面図
、第12図は第9図のコアチップを示す斜視図、第13
図は第12図の正面図、第14図は第12図の平面図、
第15図乃至第18図は従来の磁気ヘッドの製−遣方法
を説明するためのコアブロックを示す各斜視図である。
(1)・−ヘッドベース、(2) −コアチップ、(4
)(5)−コア、 (8) −媒体摺接面、(9)一
対向エツジ部、(g )−磁気ギャップ、(m)−曲面
形状、 (t ) −媒体摺接幅、(1,2)
(li3) −コアブロック、(18) −’−媒体摺
接面、 (20)−・切削曲面、(21)丁−ラ゛レ
ード、 (22)、’−エツジ部。
特 許 出 願 人 関西日本電気株式会社代
理 人 江 原、 省 吾=5
:FIG. 1 is an enlarged plan view of essential parts showing an embodiment of the magnetic head according to the present invention, FIG. 2 is a front view of FIG. 1, and FIGS. 3 and 1 are perspective views showing the core chip of FIG. 1. , FIG. 4, ・T is a front view of FIG. 3, and FIG. 5 is a plan view of FIG. 3, and FIGS. 9 is a perspective view showing a conventional example of a magnetic head, FIG. 10 is an enlarged front view of the main part of FIG. 9, and FIG. 11 is a plan view of FIG. 10, and FIG. 12 is a perspective view showing the core chip of FIG. 9;
The figure is a front view of Fig. 12, Fig. 14 is a plan view of Fig. 12,
FIGS. 15 to 18 are perspective views showing a core block for explaining a conventional method of manufacturing a magnetic head. (1) - Head base, (2) - Core chip, (4
) (5) - core, (8) - medium sliding contact surface, (9) one opposing edge, (g) - magnetic gap, (m) - curved surface shape, (t) - medium sliding contact width, (1, 2)
(li3) - core block, (18) -'-medium sliding surface, (20)--cutting curved surface, (21) blade - (22),'-edge portion. Patent applicant: Kansai NEC Co., Ltd.
Rihito Ebara, Shogo = 5
:
Claims (1)
の媒体摺接面に磁気ギャップを形成したコアチップを2
個並べて近接させた状態でヘッドベースに載置固定した
ものにおいて、 上記各コアチップの媒体摺接面の対向エッジ部を、媒体
摺接幅の1/5以上で媒体摺接幅の1/2以下に規制さ
れた曲率半径を持つ曲面形状としたことを特徴とする磁
気ヘッド。(2)ヘッドベースに2個並べて近接させた
状態で載置固定される磁気ヘッドのコアチップを製造す
るに際し、 強磁性体からなる直方体形状の一対のコアブロックをギ
ャップスペーサとなる非磁性体膜を介して突き合わせて
ガラスで接合一体化した後、その接合一体化されたコア
ブロックの媒体摺接面の長手方向に沿うエッジ部を、コ
アチップの媒体摺接幅の1/5以上で媒体摺接幅の1/
2以下に規制された曲率半径の切削曲面を有するブレー
ドでコアチップ単位ごとに切削加工するようにしたこと
を特徴とする磁気ヘッドの製造方法。(1) A core chip with a pair of cores made of ferromagnetic material joined together and a magnetic gap formed on the surface where the medium slides.
When the core chips are mounted and fixed on a head base in close proximity to each other, the opposing edges of the medium sliding contact surfaces of each of the above core chips should be at least 1/5 of the medium sliding contact width and no more than 1/2 of the medium sliding contact width. A magnetic head characterized by having a curved surface shape with a radius of curvature regulated by . (2) When manufacturing core chips for magnetic heads that are placed and fixed on the head base in close proximity, a pair of rectangular parallelepiped core blocks made of ferromagnetic material is coated with a non-magnetic film that serves as a gap spacer. After they are butted together and joined together with glass, the edge part along the longitudinal direction of the media sliding contact surface of the joined and integrated core block has a media sliding contact width of 1/5 or more of the media sliding contact width of the core chip. 1/ of
1. A method of manufacturing a magnetic head, characterized in that each core chip is cut by a blade having a cutting surface with a radius of curvature regulated to be 2 or less.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25650189A JPH03119506A (en) | 1989-09-29 | 1989-09-29 | Magnetic head and production thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25650189A JPH03119506A (en) | 1989-09-29 | 1989-09-29 | Magnetic head and production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03119506A true JPH03119506A (en) | 1991-05-21 |
Family
ID=17293512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25650189A Pending JPH03119506A (en) | 1989-09-29 | 1989-09-29 | Magnetic head and production thereof |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03119506A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05101324A (en) * | 1991-10-07 | 1993-04-23 | Nec Gumma Ltd | Magnetic head |
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60182006A (en) * | 1984-02-29 | 1985-09-17 | Victor Co Of Japan Ltd | Magnetic head |
JPS6134614B2 (en) * | 1978-04-24 | 1986-08-08 | Noranda Mines Ltd |
-
1989
- 1989-09-29 JP JP25650189A patent/JPH03119506A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6134614B2 (en) * | 1978-04-24 | 1986-08-08 | Noranda Mines Ltd | |
JPS60182006A (en) * | 1984-02-29 | 1985-09-17 | Victor Co Of Japan Ltd | Magnetic head |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05101324A (en) * | 1991-10-07 | 1993-04-23 | Nec Gumma Ltd | Magnetic head |
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 |
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