JPS6168708A - magnetic head device - Google Patents
magnetic head deviceInfo
- Publication number
- JPS6168708A JPS6168708A JP18954384A JP18954384A JPS6168708A JP S6168708 A JPS6168708 A JP S6168708A JP 18954384 A JP18954384 A JP 18954384A JP 18954384 A JP18954384 A JP 18954384A JP S6168708 A JPS6168708 A JP S6168708A
- Authority
- JP
- Japan
- Prior art keywords
- head
- recording
- gap
- reproducing
- erasing
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/17—Construction or disposition of windings
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
- G11B5/2652—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative
- G11B5/2654—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative for recording or erasing
- G11B5/2655—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track with more than one gap simultaneously operative for recording or erasing with all the gaps disposed within the track or "guard band" between tracks, e.g. with erase gaps operative on track edges, with wide erase gap followed by narrow write gap
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3176—Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps
- G11B5/3179—Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps the films being mainly disposed in parallel planes
- G11B5/3183—Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps the films being mainly disposed in parallel planes intersecting the gap plane, e.g. "horizontal head structure"
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は７０ツピデイスクドライブ装置に用いて好適な
トンネルイレーズ磁気ヘッド装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a tunnel erase magnetic head device suitable for use in a 70 disk drive device.
従来、記録／再生用ヘッドと、消去用ヘッドを一体化し
た複合磁気ヘッドがある。Conventionally, there is a composite magnetic head in which a recording/reproducing head and an erasing head are integrated.
（特開昭５９−５４０２４号公報）
しかし、この磁気ヘッドは記録／再生信号系と消去信号
系の２信号系が必要であるのみならず、生産性の面で十
分満足できるものではなかった。(Japanese Unexamined Patent Publication No. 59-54024) However, this magnetic head not only requires two signal systems, a recording/reproducing signal system and an erasing signal system, but is not fully satisfactory in terms of productivity.
本発明の目的は高性能かつ、生産性の優れたトンネルイ
レーズ磁気ヘッド装置を提供するにある。An object of the present invention is to provide a tunnel erase magnetic head device with high performance and excellent productivity.
本発明は記録／再生用ヘッドと消去用ヘッドの信号系を
１つで共用できるヘッドコア及びコイル構成とし、上記
両ヘッドのヘッドコイルを直列に接続構成した。The present invention employs a head core and coil configuration that allows the recording/reproducing head and the erasing head to share a single signal system, and the head coils of both heads are connected in series.
以下本発明の実施例を図面ｔこ基づいて説明する。第１
図は本発明の一実施例を示す斜視図である。同図におい
て、１は記録／再生ヘッド。Embodiments of the present invention will be described below with reference to the drawings. 1st
The figure is a perspective view showing one embodiment of the present invention. In the figure, 1 is a recording/reproducing head.
２．３は消去ヘッドを示し、該消去ヘッドは記録／再生
ヘッド１のトラック上下方向（両側）に図示の如く配設
されている。記録／再生ヘッド１の記録／再生信号トラ
ック幅ＴＩＴ消去ヘッド２，３の消去信号トラック幅Ｔ
２．Ｔ３及び消去ヘッド２．３間のトラック幅（トンネ
ル幅）Ｔ４はそれぞれＴ１＝８０μｍ、Ｔ２＝Ｔ３＝５
０μｍ１Ｔ４：６５μｍにある。記録／再生ヘッド１及
び消去ヘッド２，３はヘッドギャップＧ＋ 、 Ｇ２
、 Ｇ３を有する上部ヘッドコア１ａ及び２ａ、ｎ１、
ａと、下部ヘッドコア１ｂ及び２ｂ、３ｂと、ヘッドコ
イル４゛とで構成されている。ギャップを有する上部ヘ
ッドコア１ａ、２ａ＋ ３ａの上面が磁気テープ（図
示せず）に接触するテープ摺動面となる。各ヘッドコア
は磁性薄膜例えばコバルト系アモルファス膜からなり、
２０μｍの厚みに形成されている。ヘッドコアのバター
ニングはイオンミリング及びウェット、ドライ等のエツ
チング技術を用いることでできる。記録／再生ギャップ
Ｇｌと消去ギャップＧ２．Ｇ３はヘッドコア（薄膜）の
上面（膜面）かつ図示の如く非平行に形成されている。Reference numeral 2.3 denotes an erasing head, which is disposed in the vertical direction (on both sides) of the track of the recording/reproducing head 1 as shown in the figure. Recording/reproducing signal track width TIT of recording/reproducing head 1 Erase signal track width T of erasing heads 2 and 3
2. The track width (tunnel width) T4 between T3 and the erase head 2.3 is T1=80 μm, T2=T3=5, respectively.
0 μm 1T4: Located at 65 μm. The recording/reproducing head 1 and erasing heads 2 and 3 have head gaps G+ and G2.
, upper head cores 1a and 2a, n1 with G3,
a, lower head cores 1b, 2b, and 3b, and a head coil 4'. The upper surfaces of the upper head cores 1a, 2a+3a having gaps serve as tape sliding surfaces that contact a magnetic tape (not shown). Each head core is made of a magnetic thin film, such as a cobalt-based amorphous film,
It is formed to have a thickness of 20 μm. The head core can be patterned using ion milling and wet or dry etching techniques. Recording/reproducing gap Gl and erasing gap G2. G3 is formed on the upper surface (film surface) of the head core (thin film) and is non-parallel as shown.
また、該ギャップの面は膜面に対して〜６０゜に傾斜し
ている。これは次の理由による即ちギャップはギャップ
面にギャップスペーサを被着させ、しかるのち磁性膜を
堆積することで得られる。ここでギャップ面が急峻であ
ると付着膜の磁気特性が得られず、本発明者の実験によ
れば８０°が限度であった。これはギャップ面の傾斜が
大きい程膜には好結果が得られるが、不要に大きくする
と、ギャップ深さが大きくなった効果と同じことになり
、性能劣化をきたす。これを２６８以内とすると下限は
４０°以上が必要となる。消去ギャップＧ２．Ｇ３の面
はイオンミリングにより形成し、記録／再生ギャップＧ
ｌの面はダイヤバイトによるシェービング加工にて更に
良好な面に仕上げである。また記録／再生ギャップＧ１
は２μｍ、消去ギャップＧ２ 、 Ｇ３は１２μｍに形
成されている。また各々に対するヘッド巻線比はギャッ
プ長比に等しくしている。Also, the plane of the gap is inclined at ~60° with respect to the membrane plane. This is due to the following reason: the gap is obtained by depositing a gap spacer on the gap surface and then depositing a magnetic film. If the gap plane is steep, the magnetic properties of the deposited film cannot be obtained, and according to the inventor's experiments, the limit was 80°. The larger the slope of the gap surface, the better the film will be, but if it is made unnecessarily large, the effect will be the same as that of a larger gap depth, and the performance will deteriorate. If this is within 268, the lower limit must be 40° or more. Elimination gap G2. The surface of G3 is formed by ion milling, and the recording/reproducing gap G
The surface 1 is finished by shaving with a diamond bite. Also, recording/reproduction gap G1
is 2 μm, and the erase gaps G2 and G3 are 12 μm. Further, the head winding ratio for each is made equal to the gap length ratio.
ヘッドフィル４Ｖｉ記録／再生ヘツド１．消去ヘッド２
．５の上部ヘッドコア１ ａ、２ａ、５ａと下部ヘッド
コア１ｂ、２ｂ、５ｂとの間に絶縁材（図示せず）を介
して図示の如く設けである。即ちヘッドコイル４は記録
／再生ヘッド及び消去ヘッドのヘッドコイルであり、記
録／再生ヘッドのヘッドコイルと消去ヘッドのヘッドコ
イルを直列接続して１つのヘッドコイルトシである。Head fill 4Vi recording/playback head 1. Erase head 2
．． As shown in the figure, an insulating material (not shown) is provided between the upper head cores 1a, 2a, 5a and the lower head cores 1b, 2b, 5b of No.5. That is, the head coil 4 is a head coil for a recording/reproducing head and an erasing head, and the head coil for the recording/reproducing head and the head coil for the erasing head are connected in series to form one head coil.
ヘッドコイルは例えば銅であり、〜１０μｍの厚みに形
成されている。The head coil is made of copper, for example, and is formed to have a thickness of ~10 μm.
第２図は、ヘッドの記録電流特性を示したもので、横軸
記碌電流、縦軸はヘッド出力である。FIG. 2 shows the recording current characteristics of the head, where the horizontal axis shows the current and the vertical axis shows the head output.
測定は記録波長λについて各、１０μ、２０μ。Measurements were made at recording wavelengths λ of 10μ and 20μ, respectively.
１００μについてのものである。これによればλ２０μ
での記録電流増加による出力低下の影響は著しく、算適
記録電流に対し略２倍程度のオーバーカレントでその出
力はピーク値に対し２０〜３０ｄＢ低下することが解る
。It is about 100μ. According to this, λ20μ
It can be seen that the effect of a decrease in output due to an increase in recording current is remarkable, and an overcurrent of about twice the calculated recording current causes the output to decrease by 20 to 30 dB from the peak value.
従って、信号記録と消去をシリーズコイルで形成し、各
々の機能をもたせるには、記録側に最適記録磁界が発す
るときに消去側で略２陪の記録電流が流れれば２０・１
ａ以上の消去効果を得ることが出来る。Therefore, in order to form signal recording and erasing with a series coil and provide each function, it is necessary to have a recording current of approximately 20.1
It is possible to obtain an erasing effect of more than a.
また再生時の消去ヘッド１こよる信号読出しｌこついて
は、大きなギヤツブ番こすることでギャップロス効果で
有効信号に対し１０・１Ｂ以上下げることが可能である
１、また、録再ヘッドによる消去トランクの信号読出し
については、録再及び消去のギャップにアジマスを設け
ることが有効である。これらの効果を有効に生かす争件
として録再ギャップ２μｍ ＋ ？ｇ去ギャップ１２μ
ｍ、アジマス２０’を設定し測定した結束、性能上問題
ないことが確認された。録再ヘッドと消去ヘッドのギャ
ップ長（７１＋ Ｇ２に対し、巻線を各々について２Ｇ
ｉ ／ Ｇｔ、≦しとするのは、記録電流が一定のとき
、記録磁界は略ギャップ長に半比例すること、及び消去
側の磁界を記録側に対し略倍の磁界１こすることを狙っ
たためである。In addition, if the signal readout caused by the erasing head 1 during playback is difficult, by using a large gear number, it is possible to lower the effective signal by more than 10.1B due to the gap loss effect. Regarding signal readout, it is effective to provide an azimuth in the recording/reproducing and erasing gaps. Is the recording/playback gap 2μm +? G gap 12μ
It was confirmed that there was no problem with the bundling performance, which was measured by setting m and azimuth 20'. The gap length between the recording/reproducing head and the erasing head (71+G2, the winding is 2G for each
The reason why i/Gt is set is that when the recording current is constant, the recording magnetic field is approximately half proportional to the gap length, and the aim is to make the magnetic field on the erasing side cross the recording side by approximately twice as much as the magnetic field. This is because of this.
＠３図は上記発明の効果をバルクコアのヘッドに適用し
たもので、５は録再用コア半休、６はセンタコア、７は
消去用コア半休、８は巻線Ｇ５は録再ギャップ＋Ｇｙけ
消去ギャップ、９はトラック部切かき部に充填されたガ
ラスである。Figure @3 shows the effect of the above invention applied to a bulk core head, where 5 is the recording/reproducing core half-off, 6 is the center core, 7 is the erasing core half-off, and 8 is the winding G5, which is the recording/reproducing gap + Gy-erasing gap. , 9 is glass filled in the cut portion of the track portion.
以上述べた本発明によれば、記録／再生信号系と消去信
号系を一つの信号系（コイル）で兼用しているので、構
成を簡略化でき経済的効果を奏する。また、本発明によ
るヘッド構成ζこよれば、ヘッドコアとして金属薄膜を
利用することが可能となり、高性能かつ牛歩性１こ優れ
たヘッドを提供することもできる。According to the present invention described above, since one signal system (coil) serves as both the recording/reproducing signal system and the erasing signal system, the configuration can be simplified and economical effects can be achieved. Further, according to the head structure ζ according to the present invention, it is possible to use a metal thin film as the head core, and it is also possible to provide a head with high performance and excellent walking performance.
第１図は本発明の磁気ヘッド装置の模式図、第２図は本
発明の磁気ヘッドのオーバライドの効果を示した記録を
流対再生出力特性図、第６図は本発明をバルクコアのヘ
ッドに適応したときのヘッド構造の模式図である。
〔符号の説明〕
１・・・録再ヘッドの下部薄膜コア ２，３・・・消去
ヘッドの下部薄膜コア ４・・・ヘッドコイルＧｔ・・
・記録再生ヘッドの磁気ギャップ Ｇ２ ＋ Ｇ３・・
・消去ヘッドの磁気ギャップ 、・−＼代理
人弁理士 高 橋 明 夫 、−１２１１叱
篤 ２ 図
寵 ３図Fig. 1 is a schematic diagram of the magnetic head device of the present invention, Fig. 2 is a recording versus reproduction output characteristic diagram showing the effect of overriding of the magnetic head of the present invention, and Fig. 6 is a diagram of the present invention applied to a bulk core head. FIG. 3 is a schematic diagram of the head structure when adapted. [Explanation of symbols] 1... Lower thin film core of recording/reproducing head 2, 3... Lower thin film core of erasing head 4... Head coil Gt...
・Magnetic gap of recording/reproducing head G2 + G3...
・Magnetic gap of the erase head ・-＼Representative patent attorney Akio Takahashi, -1211 scolding 2 Figure 3
Claims (1)
去ヘッドを具えた磁気ヘッド装置において、上記記録／
再生ヘッド及び上記消去ヘッドは磁気的に接続された上
部ヘッドコア、下部ヘッドコアと該両ヘッドコア間に絶
縁材を介して設けられたコイルからなり、上記両ヘッド
のコイルを直列に接続し、上記記録／再生ヘッドの記録
／再生信号系と上記消去ヘッドの消去信号系を１つの信
号系で共用化したことを特徴とする磁気ヘッド装置。 ２、上記記録／再生ヘッド及び上記消去ヘッドの上部、
下部ヘッドコアは磁性薄膜で構成され、上記両ヘッドの
上部ヘッドコアの膜面に記録／再生ギャップ及び消去ギ
ャップを形成してなることを特徴とする特許請求の範囲
第１項記載の磁気ヘッド装置。 ３、上記記録／再生ギャップと上記消去ギャップが互に
非平行にあり、該記録／再生ギャップのギャップ長Ｇ＿
１と該消去ギャップのギャップ長Ｇ＿２及び各々のコア
の励磁コイルｎ＿１、ｎ＿２は２Ｇ＿１／Ｇ＿２■ｎ＿
１／ｎ＿２の関係にあることを特徴とする特許請求の範
囲第２項記載の磁気ヘッド装置。 ４、上記ギャップ形成面が膜面に対し深さ方向に４０°
〜８０°傾斜していることを特徴とする特許請求の範囲
第２項又は第３項記載の磁気ヘッド装置。[Claims] 1. A magnetic head device comprising a recording/reproducing head and an erasing head disposed on both sides of the head,
The reproducing head and the erasing head are composed of a magnetically connected upper head core, a lower head core, and a coil provided between the two head cores with an insulating material interposed therebetween. A magnetic head device characterized in that a recording/reproducing signal system of a reproducing head and an erasing signal system of the erasing head are shared by one signal system. 2. The upper part of the recording/reproducing head and the erasing head;
2. The magnetic head device according to claim 1, wherein the lower head core is made of a magnetic thin film, and a recording/reproducing gap and an erasing gap are formed on the film surface of the upper head cores of both heads. 3. The recording/reproducing gap and the erasing gap are non-parallel to each other, and the gap length G_ of the recording/reproducing gap is
1 and the gap length G_2 of the erase gap and the excitation coils n_1 and n_2 of each core are 2G_1/G_2■n_
The magnetic head device according to claim 2, characterized in that the relationship is 1/n_2. 4. The gap forming surface is 40° in the depth direction with respect to the film surface.
4. A magnetic head device according to claim 2, wherein the magnetic head device is inclined at an angle of 80 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18954384A JPS6168708A (en) | 1984-09-12 | 1984-09-12 | magnetic head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18954384A JPS6168708A (en) | 1984-09-12 | 1984-09-12 | magnetic head device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6168708A true JPS6168708A (en) | 1986-04-09 |
Family
ID=16243068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18954384A Pending JPS6168708A (en) | 1984-09-12 | 1984-09-12 | magnetic head device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168708A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06309626A (en) * | 1993-04-22 | 1994-11-04 | Victor Co Of Japan Ltd | Composite thin film magnetic head |
-
1984
- 1984-09-12 JP JP18954384A patent/JPS6168708A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06309626A (en) * | 1993-04-22 | 1994-11-04 | Victor Co Of Japan Ltd | Composite thin film magnetic head |
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