JPH0198106A - Magnetic head and its production - Google Patents
Magnetic head and its productionInfo
- Publication number
- JPH0198106A JPH0198106A JP62255949A JP25594987A JPH0198106A JP H0198106 A JPH0198106 A JP H0198106A JP 62255949 A JP62255949 A JP 62255949A JP 25594987 A JP25594987 A JP 25594987A JP H0198106 A JPH0198106 A JP H0198106A
- Authority
- JP
- Japan
- Prior art keywords
- ferrite
- magnetic
- polycrystalline
- magnetic head
- pair
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 48
- 239000013078 crystal Substances 0.000 claims abstract description 30
- 238000003746 solid phase reaction Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 30
- 239000011521 glass Substances 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010671 solid-state reaction Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 30
- 239000010409 thin film Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 7
- 229910044991 metal oxide Inorganic materials 0.000 description 7
- 150000004706 metal oxides Chemical class 0.000 description 7
- 239000002131 composite material Substances 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000702 sendust Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002109 crystal growth method Methods 0.000 description 2
- 230000005381 magnetic domain Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000000427 thin-film deposition Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- -1 Hf or 5iOt Chemical class 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、フェライトからなる一対のハーフコアの突合
せ面に、この突合せ市に対して傾斜した薄膜付着溝を形
成し、この薄膜付着溝に付着させた金属磁性膜の接合面
を磁気ギャップとするタイプの磁気ヘッドおよびその製
造方法に関する。Detailed Description of the Invention [Industrial Field of Application] The present invention involves forming a thin film adhesion groove on the abutting surfaces of a pair of half cores made of ferrite, which is inclined with respect to the abutting center, and depositing the thin film on the abutment surface of a pair of half cores made of ferrite. The present invention relates to a magnetic head of a type in which a bonding surface of a metal magnetic film formed as a magnetic gap serves as a magnetic gap, and a method of manufacturing the same.
金属磁性膜と磁気ギャップとが傾斜しているタイプの磁
気へラドコアとして、従来では、第５図に示すものが提
案されている。単結晶フェライトからなる一対のハーフ
コア１１の突合せ面には、それぞれ形成すべき磁気ギャ
ップ１２に対し傾斜した薄膜付着溝１３が上下関係を逆
にして形成されており、この薄膜付着溝１３に、スパッ
タリング、蒸着等の薄膜形成手段により、センダスト等
の金属性薄膜１４が付着されている。さらに、ハーフコ
ア１１の突合せ面で該コア１１の両側には、トラック幅
規制溝１５が磁気ギャップ１２で対称関係に形成されて
いる。このトラック幅規制溝１５は、薄膜付着溝１３の
突合せ面寄りの一端を切り欠くように配置されている。As a type of magnetic helad core in which the metal magnetic film and the magnetic gap are inclined, the one shown in FIG. 5 has been proposed. On the abutting surfaces of a pair of half cores 11 made of single-crystal ferrite, thin film attachment grooves 13 are formed with the vertical relationship reversed and are inclined with respect to the magnetic gap 12 to be formed, respectively. A thin metal film 14 such as sendust is attached by a thin film forming means such as vapor deposition or the like. Furthermore, track width regulating grooves 15 are formed in a symmetrical relationship with a magnetic gap 12 on both sides of the core 11 at the abutting surfaces of the half cores 11 . This track width regulating groove 15 is arranged so as to cut out one end of the thin film adhesion groove 13 near the abutting surface.
磁気ギャップ１２は、薄膜付着溝１３に付着形成された
金属性薄膜１４の端面間の空隙に形成されている。そし
て、はぼ７字状をなす金属性薄膜１４の空間とトラック
幅規制溝１５の空間には、ガラス等の非磁性酸化物接合
材料（以下、単にガラスという）１６が充填され、一対
のハーフコア１１が接合固着されている。なお、一方の
ハーフコア１１にはコイル巻線孔・１７が形成されてい
る。The magnetic gap 12 is formed in the gap between the end faces of the metallic thin film 14 deposited in the thin film adhesion groove 13 . Then, the space of the metal thin film 14 and the space of the track width regulating groove 15, which form a 7-shape shape, are filled with a non-magnetic oxide bonding material (hereinafter simply referred to as glass) 16 such as glass, and a pair of half cores are formed. 11 is bonded and fixed. Note that a coil winding hole 17 is formed in one half core 11.
ところで、前記ハーフコア１１として単結晶フェライト
を用いる理由は、単結晶フェライトは機械的特性にすぐ
れており、耐摩耗性を有していることから、単結晶フェ
ライトを用いた磁気へラドコアはトラック加工を高精度
に形成し得、長期間の使用にも十分耐えるものとなる。By the way, the reason why single crystal ferrite is used as the half core 11 is that single crystal ferrite has excellent mechanical properties and wear resistance. It can be formed with high precision and can withstand long-term use.
ところが、単結晶フェライトでコアを形成したフェライ
ト磁気ヘッドは、単結晶フェライト特有の雑音を発生す
る。従って、最近の高品位ビデオテープレコーダ用の映
像磁気ヘッドとしてＳ／Ｎ （信号雑音比）が問題とな
って来た。However, a ferrite magnetic head whose core is made of single-crystal ferrite generates noise peculiar to single-crystal ferrite. Therefore, S/N (signal to noise ratio) has become a problem for recent magnetic video heads for high quality video tape recorders.
なお、上記雑音発生の原因は、磁性体が単結晶材料の場
合は磁化に際しての磁区固定要素がきわめて少なく磁壁
移動が容易に起ってしまう結果であるといわれている。It is said that the cause of the noise generation is that when the magnetic material is a single crystal material, there are very few magnetic domain fixing elements during magnetization, and domain wall movement easily occurs.
一方、多結晶フェライトをコアとして用いたものは、磁
性体が多結晶材料であることから、結晶粒界を有してお
り、これが磁区を固定する要素として働き、このため単
結晶フェライトの場合のような雑音発生はない。したが
って高Ｓ／Ｎ比を要求される装置にも十分使用可能な磁
気ヘッドを形成できる。ところが、上記多結晶フェライ
トをコアとしたものは、たとえそれがホットプレス材料
および熱間静水圧プレス材料のような緻密な組織を持つ
ものであっても、接触形磁気ヘッドとして使用した場合
は、記録媒体に接触する面において、結晶粒界が脱落し
比較的短時間で使用不能に陥る。On the other hand, since the magnetic material is a polycrystalline material, those using polycrystalline ferrite as the core have crystal grain boundaries, which act as elements to fix the magnetic domains, and therefore, unlike single-crystal ferrite, There is no such noise. Therefore, it is possible to form a magnetic head that can be used satisfactorily in devices requiring a high S/N ratio. However, when the above-mentioned polycrystalline ferrite core is used as a contact type magnetic head, even if it has a dense structure such as hot pressed material or hot isostatic pressed material, On the surface that contacts the recording medium, the crystal grain boundaries fall off and become unusable in a relatively short period of time.
また、ギャップ近傍における結晶軸がランダムであるた
め出力特性が得られない等の欠点をもっている。Furthermore, since the crystal axes in the vicinity of the gap are random, it has drawbacks such as the inability to obtain output characteristics.
本発明は、かかる問題点を解決するためになされたもの
で、コア°の磁気媒体が接触する面側にある部分を単結
晶フェライト、その他の部分を多結晶フェライトで構成
し、高Ｓ／Ｎを有する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。The present invention was made in order to solve this problem, and the part of the core on the side where the magnetic medium contacts is made of single-crystal ferrite, and the other part is made of polycrystalline ferrite, resulting in a high S/N ratio. An object of the present invention is to provide a magnetic head having the following characteristics and a method for manufacturing the same.
本発明に係る磁気ヘッドは、一対のハーフコアの突合せ
面に金属磁性膜を設けた磁気ヘッドにおいて、前記ハー
フコアの磁気媒体が接触する面側の部分を単結晶フェラ
イト、その他の部分を多結晶７エライトで構成したもの
にある。A magnetic head according to the present invention is a magnetic head in which a metal magnetic film is provided on the abutting surfaces of a pair of half cores, in which a portion of the half cores on the surface side that contacts the magnetic medium is made of single crystal ferrite, and the other portion is made of polycrystalline 7-elite. It is composed of.
また、本発明による磁気ヘッドの製造方法は、単結晶フ
ェライトと多結晶フェライトとを接触させ、加熱による
固相反応によって単結晶フェライトを多結晶側に結晶成
長させ、単結晶と多結晶の２つの領域を有する一対のハ
ーフコアブロックを形成し、該一対のハーフコアブロッ
クの突合せ面に金属磁性膜を付着させた後、前記単結晶
領域を磁気媒体の接触面側となるように加工することを
特徴とする。In addition, the method for manufacturing a magnetic head according to the present invention involves bringing single-crystal ferrite and polycrystalline ferrite into contact with each other, and growing the single-crystalline ferrite toward the polycrystalline side through a solid-phase reaction caused by heating. After forming a pair of half core blocks having a region and attaching a metal magnetic film to the abutting surfaces of the pair of half core blocks, processing the single crystal region so that it becomes a contact surface side of the magnetic medium. Features.
本発明によれば、コアの磁気媒体と接触する面側か単結
晶フェライトから成るため、耐摩耗性を有し且つトラッ
ク加工の精度も高く、また、その他の部分が多結晶フェ
ライトから成るので、ｓ／Ｎが良くなる。According to the present invention, since the side of the core that contacts the magnetic medium is made of single-crystal ferrite, it has wear resistance and has high accuracy in track machining, and since the other parts are made of polycrystalline ferrite, S/N improves.
次に、本発明による磁気ヘッドの製造方法について説明
する。Next, a method of manufacturing a magnetic head according to the present invention will be explained.
先ず、第２図、第３図は本発明で用いる単結晶−多結晶
のフェライト結合体の製造方法を示したもので、１は種
子に使うＭｎ −Ｚｎ系の単結晶フェライト、２は同じ
組成を有する単結晶化しようとする多結晶７エライト、
３は単結晶フェライト１と多結晶フェライト２との接合
界面である。前記両フェライト１，２の接合面はＳＩＣ
砥粒（２０００メツシュ、４０００メツシユ）でラップ
し、その後、粒径３μｍのダイヤモンドで鏡面ランプす
る。清浄にした双方の接合面に希硝酸を塗布した後、相
互を貼り合わせて接合体となし、これを型材の中に入れ
、窒素ガスを流した雰囲気中で接合面に垂直な方向に加
圧してホットプレスする（温度１２５０℃。First, Figures 2 and 3 show the method for manufacturing the single-crystal-polycrystal ferrite composite used in the present invention, where 1 is Mn-Zn single-crystal ferrite used for the seed, and 2 is the same composition. Polycrystalline 7-elite to be made into a single crystal having
3 is a bonding interface between the single crystal ferrite 1 and the polycrystal ferrite 2. The joint surface of both ferrites 1 and 2 is SIC
Lap with abrasive grains (2000 mesh, 4000 mesh), and then mirror lamp with diamond grain size 3 μm. After applying dilute nitric acid to both cleaned joint surfaces, they are pasted together to form a joint, which is placed in a mold and pressurized in a direction perpendicular to the joint surfaces in an atmosphere with nitrogen gas flowing. and hot press (temperature 1250℃).
圧力３０１＆／ｉ、処理時間３０分）。ホットプレス後
、接合体を、熱間静水圧プレス（ＨＩＰ）法により、温
度１３２０℃で圧力１０００ ＶｆＡｌｉを３時間印加
して熱処理する。その結果、前記接合界面３が相互の固
相反応を誘起し、多結晶フェライト２側に単結晶が育成
され、単結晶化領域４が形成される。これを所定のブロ
ックに切断し、ハーフコアブロックを形成する。Pressure 301&/i, treatment time 30 minutes). After hot pressing, the bonded body is heat treated by hot isostatic pressing (HIP) by applying a pressure of 1000 VfAli at a temperature of 1320° C. for 3 hours. As a result, the bonding interface 3 induces a mutual solid phase reaction, a single crystal is grown on the polycrystalline ferrite 2 side, and a single crystallized region 4 is formed. This is cut into predetermined blocks to form half core blocks.
次に、前記ハーフコアブロックを用いた磁気ヘッドの製
造工程を第４図によ）説明する。Next, the manufacturing process of a magnetic head using the half core block will be explained (see FIG. 4).
なお、ハーフコアブロック１１の加工にあたっては、単
結晶７エライ） ｌｌｂが予め磁気媒体との接触面側に
位置するようにする。第１工程で、ハーフコアブロック
１１の突合せ面１１ａに、くさび状の薄膜付着溝１３が
形成される（第４図（ａ））。Note that when processing the half core block 11, the single crystal 7elai) is positioned in advance on the side of the contact surface with the magnetic medium. In the first step, a wedge-shaped thin film adhesion groove 13 is formed on the abutting surface 11a of the half core block 11 (FIG. 4(a)).
第２工程で、この薄膜付着溝１３に、センダスト等より
なる金属磁性膜１４がスパッタリング等により付着形成
される（第４図（ｂ））。In the second step, a metal magnetic film 14 made of sendust or the like is deposited in the thin film deposition groove 13 by sputtering or the like (FIG. 4(b)).
第３工程で、金属磁性膜１４がラップ研磨され、薄膜付
着溝１３内の金属磁性膜１４だけが残される（第４図（
Ｃ））。In the third step, the metal magnetic film 14 is lapped, leaving only the metal magnetic film 14 in the thin film adhesion groove 13 (see Fig. 4).
C)).
第４工程で、金属磁性膜１４の付着された薄膜付着溝１
３に隣接し、この薄膜付着溝１３の一部を切り欠くよう
に、トラック幅規制溝１５が加工形成される（第４図（
ｄ））。In the fourth step, the thin film adhesion groove 1 to which the metal magnetic film 14 is attached
3, a track width regulating groove 15 is formed by cutting out a part of the thin film adhesion groove 13 (see FIG. 4).
d)).
次の第５の工程で、本発明を構成する侵食防と膜２０が
、金属磁性膜１４とトラック幅規制溝１５に、スパッタ
リング等の薄膜付着手段により形成される（第４図（ｅ
））。侵食防止膜２０は、Ｃｒ −Ｔｉ ＊Ｚｎ 、’
Ｈｆなどの活性化金属あるいは５ｉＯｔ、Ｔａ５ｋｓ
などの金属酸化物のいずれかを膜厚０．４〜２μｍで単
層に形成してもよいが、上記活性化金属と金属酸化物を
積層に形成することもできる。積層形成の場合は、例え
ばまずＣｒを膜厚０．４〜２μｍでスパッタリングし、
更にこの上からＳ１０．を膜厚０．４〜１μｍでスパッ
タリングして形成する。また、侵食防止膜２０は、上記
の活性化金属と金属酸化物の複合体により形成すること
もできる。この場合は、例えばＣｒと５ｉｏｔの複合体
焼結ターゲットをスパッタリングして形成する。このよ
うな侵食防止膜２０は、次の工程であるガラス１６の溶
融充填時に、ハーフコアブロック１１の材料であるフェ
ライト等や金属磁性膜１４の材料であるセンダスト等が
、ガラス１６により侵食されるのを防ぐものである。In the next fifth step, an erosion prevention film 20 constituting the present invention is formed on the metal magnetic film 14 and the track width regulating groove 15 by thin film deposition means such as sputtering (Fig. 4(e)
)). The anti-erosion film 20 is made of Cr-Ti*Zn,'
Activated metals such as Hf or 5iOt, Ta5ks
Any of the metal oxides may be formed in a single layer with a thickness of 0.4 to 2 μm, but the activated metal and metal oxide may also be formed in a laminated layer. In the case of lamination formation, for example, first sputtering Cr to a thickness of 0.4 to 2 μm,
Furthermore, from above, S10. is formed by sputtering to a film thickness of 0.4 to 1 μm. Further, the anti-erosion film 20 can also be formed from a composite of the above-mentioned activated metal and metal oxide. In this case, for example, a composite sintered target of Cr and 5iot is formed by sputtering. Such an anti-erosion film 20 prevents ferrite, etc., which is the material of the half core block 11, and sendust, which is the material of the metal magnetic film 14, from being eroded by the glass 16 during the next process of melting and filling the glass 16. This is to prevent
第５工程で侵食防止膜２０の形成が終了した後、第６エ
程では、この侵食防止膜２０上にガラス１６が溶融充填
される。これで、ガラス１６は、侵食防止膜２０を介し
て、金属磁性膜１４と侵食防止膜２０の空間に充填され
る（第４図（ｆ））。After the formation of the anti-erosion film 20 is completed in the fifth step, the glass 16 is melted and filled onto the anti-erosion film 20 in the sixth step. The glass 16 is now filled in the space between the metal magnetic film 14 and the erosion prevention film 20 via the erosion prevention film 20 (FIG. 4(f)).
そして、第７エ程で、ガラス１６は、金属磁性膜１４の
接合面１４ｂが所定量露出するまで砥石によりラップ研
磨され、磁気ギャップ１２のギャップ幅が決定される（
第４図（ｇ））。Then, in a seventh step, the glass 16 is lapped with a grindstone until a predetermined amount of the bonding surface 14b of the metal magnetic film 14 is exposed, and the gap width of the magnetic gap 12 is determined (
Figure 4(g)).
最後の第８工程で、接合面１４ｂの研磨の終了し九一対
のハーフコアブロック１１が、磁気ギャップ１２となる
べき接合面１４ｂを位置決めして突き合わされ、両ハー
フコアブロック１１が、また、本発明の製造方法によれ
ば、単結晶フェライトと多結晶フェライトとの領域を固
相反応による単結晶育成法により形成しているので、前
記領域の制御が容易で、境界面における磁気抵抗の増大
もない。In the final eighth step, after the polishing of the bonding surfaces 14b is completed, the nine pairs of half core blocks 11 are butted against each other with the bonding surfaces 14b that are to become the magnetic gap 12 positioned, and both half core blocks 11 are also According to the manufacturing method of the present invention, since the region of single-crystal ferrite and polycrystalline ferrite is formed by a single-crystal growth method using a solid-phase reaction, the region can be easily controlled, and the magnetic resistance at the interface is increased. Nor.
以下に、本発明による磁気ヘッドの一実施例を第１図に
基いて説明する。なお、第３図において共通する部材に
は、同一符号を付して説明を省略する。An embodiment of the magnetic head according to the present invention will be described below with reference to FIG. Note that common members in FIG. 3 are denoted by the same reference numerals and explanations thereof will be omitted.
本発明では、単結晶フエライ） ｌｌｂと多結晶フェラ
イトｌｌａとからなるハーフコア１１の突合せ面１１ａ
（第４図（ａ）参照）に形成したトラック幅規制溝１５
と、このトラック幅規制溝１５に充填したガラス１６０
間に、活性化金属あるいは金属酸化物の単層膜または、
活性化金属と金属酸化物の積層膜からなる侵食防止膜２
０を介在させている。In the present invention, the abutment surface 11a of the half core 11 made of a single crystal ferrite (llb) and a polycrystalline ferrite (lla)
(See Fig. 4(a)) Track width regulating groove 15
The glass 160 filled in this track width regulating groove 15
In between, a single layer of activated metal or metal oxide, or
Erosion prevention film 2 consisting of a laminated film of activated metal and metal oxide
0 is interposed.
これは、ガラスによる金属磁性膜１４の侵食を防止する
ものである。また、侵食防止膜２０を活性化金属・金属
酸化物の複合体から構成してもよい。This prevents the metal magnetic film 14 from being eroded by glass. Furthermore, the anti-erosion film 20 may be made of a composite of activated metal and metal oxide.
この場合、活性化金属としては、Ｃｒ ＊Ｔｉ ｅＺｒ
ｅＨｆ等が好ましく、金属酸化物としては５ｌｏｔ
−Ｔａｇ’ｓなどが好ましい。また、薄膜付着溝１３に
付着形成されている金属磁性［１４のＶ字状空間にも、
ガラス１６が充填されるが、侵食防止膜２０は、この金
属磁性膜１４とガラス１６との間にも介在している。接
合されて、接合コアブロックとなる（第４図ら））。こ
の接合コアブロックを切断線Ａ−Ｂに沿って所定幅Ｓで
切断すると、第１図で示すような磁気へラドコアが得ら
れる。In this case, the activation metal is Cr *Ti eZr
eHf etc. are preferable, and as the metal oxide, 5 lots
-Tag's etc. are preferred. In addition, the metal magnetism formed in the thin film adhesion groove 13 is also in the V-shaped space [14].
Although the glass 16 is filled, the anti-erosion film 20 is also interposed between the metal magnetic film 14 and the glass 16. They are joined to form a joined core block (Fig. 4 et al.)). When this joined core block is cut along cutting line A-B to a predetermined width S, a magnetic herad core as shown in FIG. 1 is obtained.
以上説明したように、本発明の磁気ヘッドは、ハーフコ
アの磁気媒体と接触する面側の部分を単結晶フェライト
、その他の部分を多結晶フェライトで構成したものであ
るため、耐摩耗性及びトラック加工の精度をそれぞれ損
わず、且つ、高Ｓ／Ｎを保持することが出来る。As explained above, in the magnetic head of the present invention, the part of the half core on the side that contacts the magnetic medium is made of single-crystal ferrite, and the other part is made of polycrystalline ferrite, so it has excellent wear resistance and track processing. It is possible to maintain a high S/N without impairing the accuracy of each.
また、ハーフコアの単結晶と多結晶の２つの領域は固相
反応による単結晶育成法により製造しているため、本願
のように２つの領域を用いる様なコアの作成には最適で
あり、且つ、製造も簡便で、前記領域の制御も容易であ
る。また、２つの領域の境界面における磁気抵抗の増大
もない等の顕著な効果を奏する。In addition, since the two regions of the half core, single crystal and polycrystal, are manufactured by a single crystal growth method using solid phase reaction, it is optimal for creating a core that uses two regions as in the present application. , manufacturing is simple, and control of the area is also easy. Further, there are remarkable effects such as no increase in magnetic resistance at the interface between the two regions.
第１図は本発明による磁気ヘッドの斜視図、第２図及び
第３図は本発明の単結晶−多結晶のフェライト結合体の
製法を説明するための図、第４図（ａ）ないしくｈ）は
本発明による磁気ヘッドの製造方法の工程を順次示すも
ので、（ａ）ないしくｇ）は斜視図、（ωは正面図、第
５図は従来の磁気ヘッドの斜視図である。
１１・・・ハーフコア（ハーフコアブロック） 、ｌｌ
ａ・・・突合せ面、１１ｂ・・・単結晶フェライト、ｌ
ｌｃ・・・多結晶フェライト、１２・・・磁気ギャップ
、１３・・・薄膜付着溝、１４・・・金属磁性膜、１４
ａ・・・先端面、１５・・・トラック幅規制溝、１６・
・・ガラス、２０・・・侵食防止膜。
１１・・・ハーフコア
１１ｂ・９．単耗晶フェライト
１１ｃ１０．今託晶フ、ライト
１６・・・ブー）又
（ｂ）
（ｅ）
第４図
（ｈ）FIG. 1 is a perspective view of a magnetic head according to the present invention, FIGS. 2 and 3 are diagrams for explaining the manufacturing method of a single crystal-polycrystalline ferrite composite according to the present invention, and FIGS. h) sequentially shows the steps of the method of manufacturing a magnetic head according to the present invention, (a) to g) are perspective views, (ω is a front view, and FIG. 5 is a perspective view of a conventional magnetic head. 11...Half core (half core block), ll
a...Abutment surface, 11b...Single crystal ferrite, l
lc... Polycrystalline ferrite, 12... Magnetic gap, 13... Thin film adhesion groove, 14... Metal magnetic film, 14
a... Tip surface, 15... Track width regulating groove, 16...
...Glass, 20...Erosion prevention film. 11...Half core 11b.9. Monocrystalline ferrite 11c10. Right now, light 16...boo) (b) (e) Figure 4 (h)
Claims (2)
に、金属磁性膜を形成し、該金属磁性膜を突合せて磁気
ギャップとした磁気ヘッドにおいて、前記ハーフコアの
磁気媒体が接触する面側の部分を単結晶フェライト、そ
の他の部分を多結晶フェライトで構成したことを特徴と
する磁気ヘッド。(1) In a magnetic head in which a metal magnetic film is formed on the abutting surfaces of a pair of half cores made of ferrite, and the metal magnetic films are abutted to form a magnetic gap, the portion of the half core on the side where the magnetic medium comes into contact is A magnetic head characterized by comprising crystalline ferrite and other parts comprising polycrystalline ferrite.
せ、加熱による固相反応によつて単結晶フェライトを多
結晶側に結晶成長させ、単結晶と多結晶の２つの領域を
有する一対のハーフコアブロックを形成し、該一対のハ
ーフコアブロックの突合せ面に金属磁性膜を付着させた
後、前記単結晶領域を磁気媒体の接触面側となるように
、トラック幅規制溝を形成し、次に前記トラック幅規制
溝内にガラスを溶融充填し、しかる後、前記突合せ面を
研磨して磁気ギャップとなる金属磁性膜の端面を露出さ
せた後、金属磁性膜の端面を突合せてハーフコアブロッ
クを接合し、その後にこの接合コアブロックを所定幅に
切断することを特徴とする磁気ヘッドの製造方法。(2) Single-crystal ferrite and polycrystalline ferrite are brought into contact with each other, and the single-crystalline ferrite is grown on the polycrystalline side through a solid-state reaction by heating to form a pair of half cores having two regions: single-crystal and polycrystalline. After forming blocks and attaching a metal magnetic film to the abutting surfaces of the pair of half core blocks, track width regulating grooves are formed so that the single crystal region faces the contact surface of the magnetic medium, and then Glass is melted and filled into the track width regulating groove, and then the abutting surfaces are polished to expose the end faces of the metal magnetic film that will serve as the magnetic gap, and the end faces of the metal magnetic films are abutted to form a half core block. A method of manufacturing a magnetic head, which comprises bonding and then cutting the bonded core block into a predetermined width.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62255949A JPH0198106A (en) | 1987-10-09 | 1987-10-09 | Magnetic head and its production |
| KR1019880012201A KR910009026B1 (en) | 1987-10-09 | 1988-09-21 | Magnetic head and manufacturing method |
| DE3834221A DE3834221A1 (en) | 1987-10-09 | 1988-10-07 | Magnetic head and process for its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62255949A JPH0198106A (en) | 1987-10-09 | 1987-10-09 | Magnetic head and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0198106A true JPH0198106A (en) | 1989-04-17 |
Family
ID=17285817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62255949A Pending JPH0198106A (en) | 1987-10-09 | 1987-10-09 | Magnetic head and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0198106A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307873C (en) * | 2002-03-29 | 2007-04-04 | 组合化学工业株式会社 | Granular agricultural-chemical composition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54161918A (en) * | 1978-06-13 | 1979-12-22 | Toshiba Corp | Production of magnetic head |
| JPS61260406A (en) * | 1985-05-14 | 1986-11-18 | Tdk Corp | Magnetic head |
| JPS62139110A (en) * | 1985-12-11 | 1987-06-22 | Sony Corp | Manufacture of magnetic head |
-
1987
- 1987-10-09 JP JP62255949A patent/JPH0198106A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54161918A (en) * | 1978-06-13 | 1979-12-22 | Toshiba Corp | Production of magnetic head |
| JPS61260406A (en) * | 1985-05-14 | 1986-11-18 | Tdk Corp | Magnetic head |
| JPS62139110A (en) * | 1985-12-11 | 1987-06-22 | Sony Corp | Manufacture of magnetic head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307873C (en) * | 2002-03-29 | 2007-04-04 | 组合化学工业株式会社 | Granular agricultural-chemical composition |
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