JPH0626965Y2 - Thin film magnetic head - Google Patents
Thin film magnetic headInfo
- Publication number
- JPH0626965Y2 JPH0626965Y2 JP1985020690U JP2069085U JPH0626965Y2 JP H0626965 Y2 JPH0626965 Y2 JP H0626965Y2 JP 1985020690 U JP1985020690 U JP 1985020690U JP 2069085 U JP2069085 U JP 2069085U JP H0626965 Y2 JPH0626965 Y2 JP H0626965Y2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- substrate
- thin film
- magnetic
- film magnetic
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 title claims description 54
- 239000010409 thin film Substances 0.000 title claims description 26
- 238000004804 winding Methods 0.000 claims description 38
- 239000000758 substrate Substances 0.000 claims description 26
- 230000001681 protective effect Effects 0.000 claims description 15
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、薄膜磁気ヘッドに関し、詳しくはマルチトラ
ック方式を採るＤＡＴ等の薄膜磁気ヘッドに関するもの
である。The present invention relates to a thin film magnetic head, and more particularly to a thin film magnetic head such as DAT adopting a multi-track system.
従来の技術 近年、特にＤＡＴ(Digital Audio Tape recorder)用の
磁気ヘッドとして薄膜磁気ヘッドが開発されつつある。
この磁気ヘッドは、一般的に現状では、20個程度のマル
チトラックヘッドであり、製作上の理由で、ヘッド部は
薄膜で形成される。この磁気ヘッドの構造を第４図及び
第５図に示すと、（１）は強磁性体、例えばフェライト
の基板、（２）は基板（１）の端縁に沿って形成される
薄膜の磁気コア、（３）は磁気コア（２）に巻装される
薄膜からなる巻線、（４）は磁気コア（２）と巻線
（３）を保護するため、基板（１）に対向・配置させる
非磁性体の保護板である。2. Description of the Related Art In recent years, thin-film magnetic heads have been developed as magnetic heads for DAT (Digital Audio Tape recorder).
At present, this magnetic head is generally about 20 multi-track heads, and the head portion is formed of a thin film for manufacturing reasons. The structure of this magnetic head is shown in FIGS. 4 and 5, where (1) is a ferromagnetic substrate, for example, a ferrite substrate, and (2) is the magnetic properties of a thin film formed along the edge of the substrate (1). The core, (3) is a winding made of a thin film wound around the magnetic core (2), and (4) is opposed to and disposed on the substrate (1) to protect the magnetic core (2) and the winding (3). This is a non-magnetic protective plate.
基板（１）の幅（Ｌ）はカセット窓幅に入る幅に設計し
てある（第５図参照）。そして、通常、オーディオテー
プは片面ずつ往復させて記録するため、磁気コア（２）
は基板（１）の端縁に沿ってテープ幅（Ｌ／２）の間に
トラック数だけ配設される。これに対し巻線（３）のリ
ード引出し部(3a)は、基板（１）の磁気コア（２）と対
向する端部に沿って幅（Ｌ）の間に配設される。又、磁
気コア（２）の先端には、第４図に示すように、基板
（１）との間に磁気ギャップ（ｇ）が形成され、磁気コ
ア（２）と巻線（３）との間には、耐熱性と絶縁性を有
する非磁性体膜（５）、例えばＳｉＯ2の薄膜が形成さ
れている。保護板（４）もガラス等の非磁性体であり、
基板（１）に対し接着ガラス（図示せず）で接着され
る。更に、磁気コア（２）側の基板（１）の端面(1a)と
これに対向する保護板（４）の端面(4a)は、それぞれ曲
面加工されており、この面にテープが摺接する。The width (L) of the substrate (1) is designed to fit within the width of the cassette window (see FIG. 5). Since the audio tape is normally reciprocated for recording on one side, the magnetic core (2)
Are arranged along the edge of the substrate (1) for the number of tracks within the tape width (L / 2). On the other hand, the lead lead-out portion (3a) of the winding (3) is arranged within the width (L) along the end of the substrate (1) facing the magnetic core (2). Further, as shown in FIG. 4, a magnetic gap (g) is formed between the magnetic core (2) and the substrate (1) so that the magnetic core (2) and the winding (3) are separated from each other. A non-magnetic material film (5) having heat resistance and insulation property, for example, a thin film of SiO 2 is formed between them. The protective plate (4) is also a non-magnetic material such as glass,
It is adhered to the substrate (1) with an adhesive glass (not shown). Furthermore, the end face (1a) of the substrate (1) on the magnetic core (2) side and the end face (4a) of the protective plate (4) facing the end face (1a) are each curved, and the tape is in sliding contact with this face.
上記構成において、リード引出し部(3a)より巻線（３）
に通電すると、巻線（３）の巻装部に発生した磁束が、
第４図に示すように、矢印（Ｂ）のループに沿って、基
板（１）から磁気コア（２）に亘って発生し、磁気ギャ
ップ（ｇ）より洩れる磁束によって、媒体であるテープ
に磁気記録する。In the above structure, the winding (3) from the lead lead-out portion (3a)
When energized, the magnetic flux generated in the winding part of the winding (3)
As shown in FIG. 4, the magnetic flux generated from the substrate (1) to the magnetic core (2) along the loop of the arrow (B) and leaked from the magnetic gap (g) causes the magnetic tape to be magnetic. Record.
考案が解決しようとする問題点 ところで、上述した薄膜磁気ヘッドは、マルチトラック
ヘッドであるため、トラックピッチが制約され、巻線
（３）の巻装部の巻数は、せいぜい数回である。そのた
め、従来、薄膜磁気ヘッドの記録電流は大きく、消費電
力も大きい。これに対し、近年、記録電流の低減と再生
出力の増大のため巻線（３）の巻数を増すことが要求さ
れているが、トラックピッチの制約から巻数に限界があ
る。Problems to be Solved by the Invention By the way, since the above-mentioned thin film magnetic head is a multi-track head, the track pitch is limited, and the number of windings of the winding part (3) is several at most. Therefore, conventionally, a thin film magnetic head has a large recording current and a large power consumption. On the other hand, in recent years, it has been required to increase the number of turns of the winding (3) in order to reduce the recording current and increase the reproduction output, but the number of turns is limited due to the restriction of the track pitch.
問題点を解決するための手段 本考案は、強磁性体の基板の一端縁の所定位置に所定数
の薄膜磁気コアと、該コアのそれぞれに巻装される巻線
の薄膜パターンとを形成すると共に、上記コアと巻線と
の強磁性体よりなる保護板を上記基板に対向配置してな
るマルチトラック薄膜磁気ヘッドにおいて、上記各巻線
の基板の他端縁の所定位置に形成する巻装部と強磁性体
よりなる保護板上の一方の端部のリード引出し部に形成
する巻線部とによってステップアップトランスを形成す
るものである。Means for Solving the Problems The present invention forms a predetermined number of thin film magnetic cores at predetermined positions on one edge of a ferromagnetic substrate and a thin film pattern of windings wound on each of the cores. In addition, in a multi-track thin film magnetic head in which a protective plate made of a ferromagnetic material of the core and the winding is arranged to face the substrate, a winding portion formed at a predetermined position on the other end edge of the substrate of each winding. The step-up transformer is formed by the winding portion formed on the lead lead-out portion at one end on the protective plate made of a ferromagnetic material.
作用 薄膜磁気ヘッドの磁気コアに巻装される巻線の巻装部と
リード引出し部との間にステツプアップトランスを設け
るので、リード引出し部に通電する電流よりも大きい電
流を巻線の巻装部に流すことができる。又、スラップア
ップトランスのコアは、基板および保護板を兼用してい
るので構造が簡単でかつ効率が非常に良い。Action Since a step-up transformer is provided between the winding part of the winding wound around the magnetic core of the thin-film magnetic head and the lead extraction part, a current larger than the current flowing through the lead extraction part is wound. It can be washed away. Further, since the core of the slap-up transformer doubles as the substrate and the protective plate, the structure is simple and the efficiency is very good.
実施例 本考案の一実施例を第１図乃至第３図を参照して以下説
明する。図において、（１）（２）は、従来と同じく、
それぞれフェライト基板とパーマロイの薄膜磁気コア
で、（５）はＳｉＯ2の薄膜、（６）は磁気コア（２）
に巻装される巻線の薄膜パターン、(6a)は巻線（６）の
巻装部とリード引出し部(6b)とによって形成されるステ
ップアップトランス（以下単にトランスと称す。）、(6
a1)はトランス(6a)の１次コイル、(6a2)はトランス(6a)
の２次コイル、（７）は磁気コア（２）と巻線（６）の
保護板である。Embodiment An embodiment of the present invention will be described below with reference to FIGS. In the figure, (1) and (2) are
Ferrite substrate and permalloy thin film magnetic core, (5) SiO 2 thin film, (6) magnetic core (2)
A thin film pattern of the winding wound around the wire (6a) is a step-up transformer (hereinafter simply referred to as a transformer) formed by the winding portion of the winding (6) and the lead lead-out portion (6b), (6).
a 1 ) is the primary coil of the transformer (6a), (6a 2 ) is the transformer (6a)
The secondary coil (7) is a protective plate for the magnetic core (2) and the winding (6).
磁気コア（２）は、第２図に示すように従来と同様、ト
ラック数に等しく基板（１）の一端線に沿って半分のテ
ープ幅（Ｌ／２）の間に配設される。上記磁気コア
（２）に巻装される巻線（６）の巻装部とトランス(6a)
の２次コイル(6a2)は、第２図に示すように電気的に閉
回路を形成しており、基板（１）上に形成される。この
時、２次コイル(6a2)の形成位置は、従来のリード引出
し部(3a)（第５図参照）の位置であってテープ幅（Ｌ）
の全幅に渡る。そして、２次コイル(6a2)に対向する１
次コイル(6a1)は保護板（７）上に形成され、その形成
位置は第２図に示すように基板幅の全幅に渡り、リード
引出し部(6b)が１次コイル(6a1)より導出して保護板
（７）上に形成される。又、１次コイル(6a1)の形成さ
れる保護板（７）は磁性体、磁気コア（２）を保護する
保護板(7)は非磁性体でなければならない。そこで、保
護板（７）は１次コイル(6a1)の形成されるフェライト
等の磁性保護板(7a)にガラス等の非磁性保護板(7b)を溶
着したものである。そのため、非磁性体保護板(7b)は、
従来と同じく、接着ガラス（図示せず）にて基板（１）
に接着されるが、フェライト等の磁性保護板(7a)の接着
には、有機系の樹脂、例えばエポキシ樹脂を用いればよ
い。そして、上記保護板（７）はトランス(6a)の１次コ
イル(6a1)と２次コイル(6a2)とを対向させて基板（１）
に接着される。As shown in FIG. 2, the magnetic cores (2) are arranged along the one end line of the substrate (1) with a half tape width (L / 2) equal to the number of tracks as in the conventional case. Winding part of winding (6) wound around the magnetic core (2) and transformer (6a)
The secondary coil (6a 2 ) of the above electrically forms a closed circuit as shown in FIG. 2, and is formed on the substrate (1). At this time, the forming position of the secondary coil (6a 2 ) is the position of the conventional lead lead-out portion (3a) (see FIG. 5) and the tape width (L).
Across the entire width of. And the one facing the secondary coil (6a 2 ).
The secondary coil (6a 1 ) is formed on the protective plate (7), and the formation position is over the entire width of the substrate as shown in FIG. 2, and the lead lead-out portion (6b) is formed from the primary coil (6a 1 ). It is led out and formed on the protective plate (7). Further, the protective plate (7) on which the primary coil (6a 1 ) is formed must be a magnetic substance, and the protective plate (7) for protecting the magnetic core (2) must be a non-magnetic substance. Therefore, the protection plate (7) is formed by welding a non-magnetic protection plate (7b) such as glass to a magnetic protection plate (7a) such as ferrite on which the primary coil (6a 1 ) is formed. Therefore, the non-magnetic protective plate (7b),
As before, the substrate (1) is made of adhesive glass (not shown)
However, an organic resin such as an epoxy resin may be used for adhering the magnetic protection plate (7a) such as ferrite. The protective plate (7) is arranged so that the primary coil (6a 1 ) and the secondary coil (6a 2 ) of the transformer (6a) face each other and the substrate (1)
Glued to.
上記構成に基づき本考案の動作を次に示す。まず、第２
図に示すようにトランス(6a)の１次コイル(6a1)の巻数
をＮ1、２次コイル(6a2)の巻数をＮ2、１次コイル(6a1)
に流れる電流（印加電流）をＩ1、２次コイル(6a2)に流
れる電流（記録電流）をＩ2とすると、Ｉ2＝（Ｎ1／
Ｎ2）Ｉ1となり、Ｎ2＜Ｎ1とすれば、Ｉ1＜Ｉ2となる。
従って、印加電流（Ｉ1）が小さくても、（Ｎ1／Ｎ2）
＞１とすることにより記録電流（Ｉ2）を大きくできる
ため、巻線（６）の磁気コア（２）に巻装される回数を
少なくしても再生出力を増大させることができる。即
ち、巻線（６）は磁気コア（２）に少なくとも１回巻装
されればよく、これに対しトランス(6a)の１次コイル(6
a1)と２次コイル(6a2)は、基板幅の全幅に渡って形成さ
れるため十分な巻数を確保できる。The operation of the present invention based on the above configuration will be described below. First, the second
As shown in the figure, the number of turns of the primary coil (6a 1 ) of the transformer (6a) is N 1 , the number of turns of the secondary coil (6a 2 ) is N 2 , and the primary coil (6a 1 )
If the current (applied current) flowing through I 2 is I 1 and the current flowing through the secondary coil (6a 2 ) (recording current) is I 2 , then I 2 = (N 1 /
N 2 ) I 1 , and if N 2 <N 1 , then I 1 <I 2 .
Therefore, even if the applied current (I 1 ) is small, (N 1 / N 2 )
By setting> 1, the recording current (I 2 ) can be increased, so that the reproduction output can be increased even if the number of times the winding (6) is wound around the magnetic core (2) is reduced. That is, the winding (6) may be wound around the magnetic core (2) at least once, whereas the winding (6) may be wound around the primary coil (6) of the transformer (6a).
a 1) and the secondary coil (6a 2) can ensure a sufficient number of turns to be formed over the entire width of the substrate width.
尚、第４図に示す従来の薄膜磁気ヘッドにおいて、磁気
コア（２）と巻線（３）とで挟まれる部分（Ｍ）には、
通常、巻線（３）の共通バイアス線（図示せず）が形成
されているが、上記実施例によれば、共通バイアス線を
なくすることも可能となる。又、トランス(6a)の係合係
数を大きくするため１次コイル(6a1)と２次コイル(6a2)
とを出来るだけ近付けることが望ましい。In the conventional thin film magnetic head shown in FIG. 4, the portion (M) sandwiched between the magnetic core (2) and the winding (3) is
Normally, the common bias line (not shown) of the winding (3) is formed, but according to the above-described embodiment, it is possible to eliminate the common bias line. Also, in order to increase the engagement coefficient of the transformer (6a), the primary coil (6a 1 ) and the secondary coil (6a 2 )
It is desirable to bring and as close as possible.
考案の効果 本考案によれば、マルチトラックの薄膜磁気ヘッドにお
いて、磁気コアに巻装される巻線の巻装部とリード引出
し部とによって、ステップアップトランスを形成したか
ら、印加電流が小さくても大きな記録電流が得られ、上
記巻線の磁気コアに巻装される回数を少なくしても再生
出力を増大させることができ、消費電力も小さくなる。According to the present invention, in the multi-track thin film magnetic head, the step-up transformer is formed by the winding part of the winding wound around the magnetic core and the lead lead-out part, so that the applied current is small. A large recording current can be obtained, the reproduction output can be increased and the power consumption can be reduced even if the number of times of winding the magnetic core around the winding is reduced.
第１図は本考案に係る薄膜磁気ヘッドの一実施例の平面
図で、一部は断面を示す。第２図(a)は第１図のＢ−Ｂ
線にて切断した側面図、第２図（ｂ）は第１図のＣ−Ｃ
線にて切断した側面図、第３図は本考案の概念図、第４
図は従来の薄膜磁気ヘッドの平面図で、一部は断面を示
す。第５図は第４図のＡ−Ａ線にて切断した側面図であ
る。 （１）…基板、（２）…薄膜磁気コア、（６）…巻線、
(6a)…ステップアップトランス、(6b)…リード引出し
部、（７）…保護板。FIG. 1 is a plan view of an embodiment of a thin-film magnetic head according to the present invention, and a part of it shows a cross section. FIG. 2 (a) is BB of FIG.
The side view cut by the line, FIG. 2 (b) is CC of FIG.
A side view taken along a line, FIG. 3 is a conceptual view of the present invention, and FIG.
The figure is a plan view of a conventional thin film magnetic head, and a part thereof shows a cross section. FIG. 5 is a side view taken along the line AA in FIG. (1) ... Substrate, (2) ... Thin film magnetic core, (6) ... Winding,
(6a) ... Step-up transformer, (6b) ... Lead lead-out part, (7) ... Protection plate.
Claims (1)
数の薄膜磁気コアと、該コアのそれぞれに巻装される巻
線の薄膜パターンとを形成すると共に、上記コアと巻線
との強磁性体よりなる保護板を上記基板に対向配置して
なるマルチトラック薄膜磁気ヘッドにおいて、 上記各巻線の基板の他端縁の所定位置に形成する巻装部
と強磁性体よりなる保護板上の一方の端部のリード引出
し部に形成する巻線部とによってステップアップトラン
スを形成したことを特徴とする薄膜磁気ヘッド。1. A predetermined number of thin film magnetic cores and a thin film pattern of windings wound around each of the cores are formed at predetermined positions on one end edge of a ferromagnetic substrate, and the cores and the windings are formed. In a multi-track thin-film magnetic head in which a protective plate made of a ferromagnetic material is arranged opposite to the substrate, a winding portion formed at a predetermined position on the other end edge of the substrate of each winding and a protective material made of a ferromagnetic material. A thin-film magnetic head characterized in that a step-up transformer is formed by a winding portion formed on a lead lead-out portion at one end on a plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020690U JPH0626965Y2 (en) | 1985-02-16 | 1985-02-16 | Thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985020690U JPH0626965Y2 (en) | 1985-02-16 | 1985-02-16 | Thin film magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61140420U JPS61140420U (en) | 1986-08-30 |
| JPH0626965Y2 true JPH0626965Y2 (en) | 1994-07-20 |
Family
ID=30511415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985020690U Expired - Lifetime JPH0626965Y2 (en) | 1985-02-16 | 1985-02-16 | Thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626965Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837831A (en) * | 1981-08-31 | 1983-03-05 | Hitachi Ltd | Magnetic head assembly and its production |
| JPS5897718U (en) * | 1981-12-23 | 1983-07-02 | ソニー株式会社 | thin film magnetic head |
| JPS59172107A (en) * | 1983-03-18 | 1984-09-28 | Matsushita Electric Ind Co Ltd | Thin-film magnetic head and its manufacture |
-
1985
- 1985-02-16 JP JP1985020690U patent/JPH0626965Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61140420U (en) | 1986-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5296993A (en) | Magnetic head with magnetic substrate and an enhanced poletip thereon | |
| JPS6118249B2 (en) | ||
| US6801379B2 (en) | Multi-magnetic recording head, and magnetic recording method and magnetic recording apparatus using the same | |
| US5260845A (en) | Magnetic head having a thin film conductor coil assembly formed separate from a magnetic head core | |
| US4745506A (en) | Magnetic head for perpendicular magnetic recording and reproduction | |
| EP0199522B1 (en) | Step-up type magnetic head | |
| JPH0626965Y2 (en) | Thin film magnetic head | |
| JPH0664709B2 (en) | Thin film magnetic head | |
| US4625250A (en) | Multi-track magnetic head | |
| JPS61120318A (en) | Unified thin film magnetic head | |
| JP2754804B2 (en) | Method for manufacturing thin-film magnetic head | |
| JPS60175208A (en) | thin film magnetic head | |
| JPH0630130B2 (en) | Method of manufacturing thin film magnetic head | |
| JPS6331852B2 (en) | ||
| JPH0154766B2 (en) | ||
| JPS6366707A (en) | Compound type magnetic head | |
| JPH0325289Y2 (en) | ||
| JP2563596B2 (en) | Composite thin film magnetic head | |
| JP2973609B2 (en) | Magnetic head for magnetic tape | |
| SU1185382A1 (en) | Multitrack thin-film magnetic head | |
| JPS61144709A (en) | magnetic head | |
| JPH0278008A (en) | Constituting body of thin film magnetic head | |
| JPS61122907A (en) | Vertical magnetic head | |
| JPH0536018A (en) | Magnetic head and manufacture of the same | |
| JPH03156714A (en) | Thin film magnetic head and its manufacturing method |