JPS628309A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a tunnel erase type magnetic head with ease of manufacture, simple structure and narrow track width by forming a slot having the same width as the core width to a block at the winding window side, imbedding high magnetic film to the slot, forming the high magnetic film to both faces of a straight block having no winding and butting the blocks. CONSTITUTION:Winding windows 8, 9 having windings 13, 13' are processed respectively to core blocks 1, 2, and slots 10, 11 having the same width as the read/write core width (t) and the erase core width (te) are processed respectively to the opposite face of magnetic gaps (g), (ge). After the processing, the high magnetic films 4, 5 are formed to the face opposed to the magnetic gap of the core blocks 1, 2, the high magnetic film on the face opposed to the gap except the slots 10, 11 to expose the nonmagnetic member onto the surface. On the other hand, the core block 3 not having winding is made of similar nonmagnetic plate to that for the core blocks 1, 2 and the similar high magnetic film 7 is formed to two faces opposed to the read/write gap (g) and the erase gap (ge). A glass film 6 is formed to a face opposed to the magnetic gap, the core blocks 1, 2 are butted, heated and pressed to be incorporated.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明はトンネルイレーズ形磁気ヘッドに係り、特に狭
トラツク幅でヘッド効率が高（、製造容易で高信頼性を
確保できるのに好適な磁気ヘッドに関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a tunnel erase type magnetic head, and particularly to a magnetic head suitable for achieving narrow track width, high head efficiency (easy manufacture, and ensuring high reliability). Regarding.

〔発明の背景〕[Background of the invention]

従来の狭トラツ゛り幅でヘッド効率を高（した磁気ヘッ
ドとして、特開昭５６−１６９２１４号に記載のように
コアブロックの磁気ギャップ構成部分に高飽和磁束密度
の凪性材を磁気ギャップに斜交して形放し、磁気ギャッ
プ突合せ面を精度良く加工し、トラック幅を形成する構
造が提案されている。しかし、コアブロックを磁気ギャ
ップと斜交する形状に加工しなければならず、又、その
形状のため媒体対向面側に三角形の穴ができ、摺動時の
媒体の損傷あるいは高磁性材の剥離などを防止するため
溝をガラス等で充填する必要が有り製造方法が複雑にな
り高価になる。又、上記充填材がヘッド組宜時の熱履歴
等によりコアブロック材や高磁性形成膜との熱膨張係数
との違いにより内部応力がかかり、充填材自体にクラッ
クが生じたり、又高磁性膜の特性を劣化させたりする問
題が有った。As a conventional magnetic head with a narrow travel width and high head efficiency, as described in Japanese Patent Application Laid-open No. 169214/1984, a gentle material with high saturation magnetic flux density is applied to the magnetic gap component of the core block at an angle to the magnetic gap. A structure has been proposed in which the track width is formed by intersecting and releasing the shape and processing the abutting surfaces of the magnetic gap with high precision.However, the core block must be processed into a shape obliquely intersecting the magnetic gap, and Due to its shape, a triangular hole is created on the side facing the medium, and in order to prevent damage to the medium during sliding or peeling of the highly magnetic material, the groove must be filled with glass, etc., making the manufacturing method complicated and expensive. In addition, due to the thermal history of the filler during head assembly, internal stress may be applied due to the difference in thermal expansion coefficient between the core block material and the highly magnetic forming film, and the filler itself may crack. There was a problem that the characteristics of the highly magnetic film were deteriorated.

又、他の従来の狭トランク幅で高磁性膜を用いた磁気ヘ
ッド例として、特開昭ｇ　ｑ−１３５６２２号に記載の
ように、磁気ギャップ対向面に高磁性膜を形成し、巻線
側でないストレート状のコアブロック上の高磁性膜は、
媒体対向面部に凹凸をつけて狭トラツクに絞る構造にし
ている。In addition, as another example of a conventional magnetic head using a high magnetic film with a narrow trunk width, as described in Japanese Patent Application Laid-Open No. 135622, a high magnetic film is formed on the surface facing the magnetic gap, and The high magnetic film on the straight core block is
The surface facing the medium has an uneven structure that narrows the track.

しかし、本構造の磁気へラドコアも母性膜に凹凸をつけ
るためにマスク蒸着　スパッタ、あるいはフォトエツチ
ング等ＩＣ製造と同様の工程が必要で、磁気ヘッドコア
製造方法が複雑で設備も大掛りになり安価にできない。However, the magnetic head core of this structure also requires the same process as IC manufacturing, such as mask vapor deposition, sputtering, or photo etching, to create irregularities on the mother film, making the manufacturing method of the magnetic head core complicated and requiring large-scale equipment, making it less expensive. Can not.

又、前述の構造例と同様理由により高磁性膜凹部に充填
材が必要で、磁気ヘッド信頼性確保のためには問題が有
った。Further, for the same reason as in the above-mentioned structural example, a filling material is required in the recessed portion of the highly magnetic film, which poses a problem in ensuring the reliability of the magnetic head.

〔発明の目的〕 本発明の目的は、製造容易で安価に出来、構造も簡単で
高信頼性が確保でき、記録装置の大容量高記録密度化に
対応できる狭トランク幅のトンネルイレーズ形凪気ヘッ
ドを提供することにある。[Object of the Invention] The object of the present invention is to provide a tunnel erase type cooling device with a narrow trunk width, which can be manufactured easily and inexpensively, has a simple structure, ensures high reliability, and is compatible with large-capacity and high-density recording devices. The purpose is to provide the head.

〔発明の概要〕[Summary of the invention]

本発明の特徴とするところは、磁気ギャップに相対向す
るコアブロックを非磁性材とし、そのブロック上のギャ
ップ対向面側に高磁性膜を形成し、巻線窓側のブロック
はコア幅と同一寸法の溝を切り、その溝に高磁性膜を埋
込み、巻線をしない側のスレートブロックは両面に高磁
性膜を形成して、各々のブロックを突合せることにあり
、製造容易で構造が簡単な狭トラック偏のトンネルイレ
ーズ形磁気ヘッドが得られる。The present invention is characterized in that the core block facing the magnetic gap is made of a non-magnetic material, a highly magnetic film is formed on the side of the block facing the gap, and the block on the winding window side has the same size as the core width. A groove is cut in the slate block, a highly magnetic film is embedded in the groove, a highly magnetic film is formed on both sides of the slate block on the side where no winding is to be done, and the blocks are butted together, making it easy to manufacture and have a simple structure. A tunnel erase magnetic head with a narrow track bias can be obtained.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例をオ１図、第２図により説明す
る。第１図で１＃２は巻線１３．１３’を施す側のり−
ド／ライト及びイレーズの各々のコアブロックを示し、
例えばチタバリ・非凪性フェライト等の非磁性材で作ら
れる。コアブロック１，２は巻線１３．１３’を施すた
めの巻線窓８゜９をそれぞれ刀ａ工し、又、リード／ラ
イトコツ幅ｔ、イレーズコア＠ｔｅと同一寸法の第２図
に示す溝１０．１１を磁気ギャップ？、？４の対向面側
に各々加工する。加工後、コアブロック１，２の磁気ギ
ャップ対向面側にそれぞれアモルファススパッタ、セン
ダストスパッタ等にヨ’）高飽和磁束密度・高透磁率の
高磁性膜４，５を形成し、第２図に示す溝１０．１１を
高磁性膜４，５で満たした後磁気ギャップ？＝９４対向
面側を加工し、溝部１０．１１以外はギャップ対向面上
の高磁性膜を取り除き非磁性材を表面に出す。一方、巻
線を施さない側のコアブロック３はコアブロック１，２
と同様の非磁性材の板で、リード／ライトギャップ？、
イレーズギャップを番対向面の２面廻上記と同様の高磁
性膜７を形成する。Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 1 and 2. In Figure 1, 1#2 is the glue on the side where winding 13.13' is applied.
shows each core block for write/write and erase,
For example, it is made of non-magnetic material such as Chitavari or non-calm ferrite. The core blocks 1 and 2 have winding windows 8°9 for applying the windings 13 and 13', respectively, and have the read/write width t and the same dimensions as the erase core @te as shown in Figure 2. Is groove 10.11 a magnetic gap? ,? Process each on the opposite surface side of No. 4. After processing, high magnetic films 4 and 5 with high saturation magnetic flux density and high magnetic permeability are formed by amorphous sputtering, sendust sputtering, etc. on the magnetic gap facing sides of the core blocks 1 and 2, respectively, as shown in FIG. After filling grooves 10 and 11 with highly magnetic films 4 and 5, is there a magnetic gap? =94 The opposing surface side is processed, and the highly magnetic film on the gap opposing surface is removed except for the grooves 10 and 11 to expose the non-magnetic material to the surface. On the other hand, the core block 3 on the side where no winding is applied is the core block 1, 2
Is there a read/write gap with a plate made of non-magnetic material similar to ? ,
A highly magnetic film 7 similar to that described above is formed around the two opposing surfaces with an erase gap.

以上で述べたコアブロック１，２．３に例えばガラスス
パッタ等により磁気ギャップ対向面に所望のギャップ長
になる様ガラス膜６を形成し、各々を牙１図の様に突合
せて加熱、加圧保持し、３ブロツクを一体化する。コア
ブロック１，２の溝１０．１１には高母性膜が満たされ
ており、溝以外は磁気ギャップ突合せ面には非磁性材が
露出するため結局リード／ライトコア幅は溝１００幅ｔ
となり、又、イレーズコア幅は溝１１０幅ｔ４となる。A glass film 6 is formed on the core blocks 1, 2.3 described above by glass sputtering or the like so as to have a desired gap length on the surface facing the magnetic gap, and the core blocks 1, 2.3 are butted together as shown in Fig. 1 and heated and pressurized. Hold and combine the 3 blocks. The grooves 10 and 11 of the core blocks 1 and 2 are filled with a high-matrix film, and non-magnetic material is exposed on the magnetic gap abutting surface except for the grooves, so the read/write core width is ultimately 100 groove widths t.
Also, the erase core width is the groove 110 width t4.

次にコアブロック１，２の製造方法を第３図。Next, FIG. 3 shows a method of manufacturing core blocks 1 and 2.

才４図で説明する。コアブロック１，２の製造方法は同
じであるため、ここではコアブロック１に例をとり説明
する。まず才３図に示す様に、多数個のコアが取れる様
にトラック幅方向に長いコアブロック１に巻線窓８及び
コア幅ｔとなる溝１０を加工する。加工後オ５図の白矢
印の方向からアモルファス、センダスト等の高磁性膜を
スパッタあるいは蒸着等で形成する。高磁性膜形成後の
コアプロｒり１を矛４図に示す。一点鎖線で示す高磁性
膜４は溝１０の中及び磁気ギャップ対向面側に密着して
いる。次に磁気ギャップ突合せ面上に付着した高磁性膜
４を除去する様な二点鎖線１２で示す加工面までラップ
加工等で追込む。以上の製造方法により才５図に示す多
数個取りのり−ド／ライトコアブロック１及びイレーズ
コアブロック２を作成する。又、コアブロック３は多数
個取りのコアブロックｔ２の長さに合せた非磁性板のそ
れぞれの対向面の両面に高磁性膜をコアブロック１．２
と同様に形成する。そしてコアブロック１，２．５をガ
ラス等で突合せ接着し、矛５図の一点鎖線で示すＣ８・
Ｃ，ｌ　・・・、Ｃｎ、で切断し個々のトンネルイレー
ズ形リード／ライト一体コアを作成する。This will be explained using Figure 4. Since the manufacturing methods for core blocks 1 and 2 are the same, core block 1 will be explained here as an example. First, as shown in Figure 3, a winding window 8 and a groove 10 having a core width t are formed in a core block 1 which is long in the track width direction so that a large number of cores can be obtained. After processing, a highly magnetic film such as amorphous or sendust is formed by sputtering or vapor deposition in the direction of the white arrow in FIG. Figure 4 shows the core process 1 after forming the highly magnetic film. The highly magnetic film 4 shown by the dashed line is in close contact with the inside of the groove 10 and on the side facing the magnetic gap. Next, a lapping process or the like is performed to reach the processed surface indicated by the two-dot chain line 12, which removes the highly magnetic film 4 attached to the magnetic gap abutting surface. By the above manufacturing method, a multi-piece glued/write core block 1 and an erased core block 2 shown in FIG. 5 are manufactured. In addition, the core block 3 is made of a core block 1.2 in which a high magnetic film is coated on both sides of each opposing surface of a non-magnetic plate that matches the length of the multi-piece core block t2.
Form in the same way as . Then, core blocks 1 and 2.5 are butted and glued together with glass, etc., and C8, which is shown by the dashed line in Figure 5, is
Cut at C, l . . . , Cn to create individual tunnel erase type read/write integrated cores.

この一体コアに磁気ヘッド組立体構造により、両脇に非
磁性スライダーを接着しても、あるいは一体コア単独で
本鈴媒体と摺動させる構造としても良い。以上説明した
本実施例の磁気ヘッドコア構造によれば、コア製造方法
は従来の磁気へラドコア製造方法に高磁性膜を単純に付
着させるだけの工程を付加するだけで製作でき、ガラス
等の充填材の必要がなく構造も簡単で容易に製造できる
効果がある。With a magnetic head assembly structure on this integral core, non-magnetic sliders may be attached to both sides, or the integral core alone may be configured to slide with the main medium. According to the magnetic head core structure of this embodiment described above, the core can be manufactured by simply adding a step of attaching a highly magnetic film to the conventional magnetic head core manufacturing method, and the core can be manufactured by adding a step of simply attaching a highly magnetic film to the conventional magnetic head core manufacturing method. It has the advantage of being simple in structure and easy to manufacture.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、従来の磁気へラドコア製造技術がその
まま使用でき、それに高凪性膜形成装置が有れば狭トラ
ック福のトンネルイレーズ形磁気ヘッドのリード／ライ
ト、イレーズ一体形コアの製造が容易に出来るので、コ
アを安価に出来る。又、ガラス等の充填材が無（てもコ
アの媒体対向面側には穴ができない構造であり、媒体と
コアの耐摺動性及び充填材により生ずる内部応力のため
の充填材のクラックや高磁性膜の特性への影響を考慮せ
ずに済み高信頼性が確保できる効果がある。更にリード
／ライトギャップｔとイレーズギャップｔ４との間隔は
板状の非磁性コアブロック３の厚み加工精度でほとんど
決まるので、ギャップ間隔を小さくかつ数ミクロン程度
の高精度に抑えることができ、７１：７ツビデイスク装
置等の記録容量に寄与しないセクタブロック間隔領域を
最小に留められ高記録密度化出来る効果がある。According to the present invention, the conventional magnetic helide core manufacturing technology can be used as is, and if a high-temperature film forming apparatus is included, it is possible to manufacture read/write and erase integrated cores for narrow track tunnel erase type magnetic heads. Since it is easy to do, the core can be made at low cost. In addition, even if there is no filler such as glass, the structure does not allow holes on the side of the core that faces the medium, and cracks in the filler due to the sliding resistance between the medium and the core and internal stress caused by the filler. This has the effect of ensuring high reliability without considering the effect on the characteristics of the highly magnetic film.Furthermore, the distance between the read/write gap t and the erase gap t4 is determined by the thickness processing accuracy of the plate-shaped non-magnetic core block 3. Since it is almost determined by , the gap interval can be kept small and highly accurate to a few microns, which has the effect of minimizing the sector block interval area that does not contribute to the recording capacity of 71:7 disc devices, etc., and increasing the recording density. be.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例によるトンネルイレーズ形磁
気ヘッドの斜視図、第２図は、？１図の５つのコアブロ
ックを接着する前の分離した図、才３図及び、１？４図
はり−ド／ライトコアブロックの製造過程を説明するた
めの図、矛５図は３つのコアブロックを接合した状態を
示す斜視図である。 １＠２・３・・・コアブロック、４・５・６・・・高磁
性膜、７・・・ギャップ材、８・９・・・巻線窓、１０
・１１・・・トラック幅規制溝、１２・・・高ａ性膜形
成後のコアブロックの加工面。FIG. 1 is a perspective view of a tunnel erase magnetic head according to an embodiment of the present invention, and FIG. 2 is a perspective view of a tunnel erase type magnetic head according to an embodiment of the present invention. Figure 1 shows the five core blocks separated before they are glued together, Figures 3 and 1 to 4 are diagrams to explain the manufacturing process of beamed/light core blocks, and Figure 5 shows the three core blocks. FIG. [email protected]... Core block, 4.5.6... Highly magnetic film, 7... Gap material, 8.9... Winding window, 10
・11... Track width regulating groove, 12... Machining surface of the core block after forming the high-alpha film.

Claims (1)

【特許請求の範囲】[Claims] １、非磁性のブロックで、対抗する二つの面に高磁性材
料膜が形成された第１のコアブロックと、該第１のコア
ブロックの一方の面に接合された非磁性のブロックで、
巻線窓および前記第１のコアブロックとの接合部にリー
ド／ライトトラック幅に相当する溝を有し、該溝には高
磁性材料が埋込まれ、巻線窓には前記溝部に続く高磁性
材料膜が形成された第２のコアブロックと、前記第１の
コアブロックの他方の面に接合された非磁性のブロック
で、巻線窓および前記第１のコアブロックとの接合部に
イレーズ幅に相当する夫々離れた２つの溝を有し、該溝
には高磁性材料が埋込まれ、巻線窓には前該溝部に続く
高磁性材料膜が形成された第３のコアブロックと、前記
第２および第３のコアブロックの巻線窓に施こされた巻
線とを具備したことを特徴とする磁気ヘッド。1. A first core block that is a non-magnetic block and has highly magnetic material films formed on two opposing surfaces, and a non-magnetic block that is bonded to one surface of the first core block,
A groove corresponding to the read/write track width is provided at the joint between the winding window and the first core block, a highly magnetic material is embedded in the groove, and a high magnetic material is provided in the winding window following the groove. A second core block on which a magnetic material film is formed and a non-magnetic block bonded to the other surface of the first core block, and erase is performed at the joint between the winding window and the first core block. A third core block has two grooves separated from each other corresponding to the width, a highly magnetic material is embedded in the grooves, and a high magnetic material film is formed in the winding window following the groove. , and windings applied to the winding windows of the second and third core blocks.