JPH0223923B2 - - Google Patents
Info
- Publication number
- JPH0223923B2 JPH0223923B2 JP23268584A JP23268584A JPH0223923B2 JP H0223923 B2 JPH0223923 B2 JP H0223923B2 JP 23268584 A JP23268584 A JP 23268584A JP 23268584 A JP23268584 A JP 23268584A JP H0223923 B2 JPH0223923 B2 JP H0223923B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- magnetic
- composite
- gap
- magnetic material
- 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
Links
- 239000000696 magnetic material Substances 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 238000005530 etching Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 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
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000001771 vacuum deposition 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
- G11B5/1274—Structure or manufacture of heads, e.g. inductive with "composite" cores, i.e. cores composed in some parts of magnetic particles and in some other parts of magnetic metal layers
-
- 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
- G11B5/21—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being of ferrous sheet metal or other magnetic layers
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、映像信号等の高周波成分を含む信号
を、高抗磁力を有するメタルテープ等の記録媒体
に記録・再生するのに適した磁気ヘツドの製造方
法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention provides a magnetic recording medium suitable for recording and reproducing signals including high frequency components such as video signals on a recording medium such as a metal tape having high coercive force. This invention relates to a method for manufacturing a head.
（従来の技術）
ビデオテープレコーダに用いられる磁気ヘツド
コアには、一般に、耐摩耗性および軟磁性特性が
良好なフエライト材が用いられている。(Prior Art) Ferrite material, which has good wear resistance and soft magnetic properties, is generally used for magnetic head cores used in video tape recorders.
ところが、最近、ビデオテープレコーダの小型
化および高密度記録化が進むにつれてメタルテー
プ等の高抗磁力を有する高密度磁気記録媒体が使
用される傾向にあり、従来のフエライト材を用い
た磁気ヘツドでは、コア主体の飽和磁束密度が小
さいため、そのような高密度磁気記録媒体を十分
に磁化することはできない。 However, recently, as video tape recorders have become smaller and have higher recording density, there has been a trend toward the use of high-density magnetic recording media with high coercive force, such as metal tapes, and magnetic heads using conventional ferrite materials are no longer suitable. , such a high-density magnetic recording medium cannot be sufficiently magnetized because the saturation magnetic flux density of the core is low.
そこで、近年、大きな飽和磁束密度を有する、
例えばセンダスト合金やアモルフアス合金等の合
金磁性材料をコア主体とする磁気ヘツドの研究、
開発、およびフエライト材等の酸化物磁性材料の
より一層の高性能化が進められている。 Therefore, in recent years, magnets with large saturation magnetic flux density,
For example, research on magnetic heads whose core is made of alloy magnetic materials such as sendust alloys and amorphous alloys,
Development and further improvement of the performance of oxide magnetic materials such as ferrite materials are progressing.
本発明者は、合金磁性材料のもつ大きい飽和磁
束密度、および酸化物磁性材料のもつ高周波帯域
での高透磁率に着目し、本発明を完成するに致つ
た。 The present inventors focused on the high saturation magnetic flux density of alloy magnetic materials and the high magnetic permeability in high frequency bands of oxide magnetic materials, and completed the present invention.
（発明の目的）
本発明は、メタルテープ等の高抗磁力を有する
高密度磁気記録媒体を十分に磁化することのでき
る、合金磁性材料および酸化物磁性材料からなる
磁気ヘツドの製造方法を提供することを目的とす
る。(Object of the Invention) The present invention provides a method for manufacturing a magnetic head made of alloy magnetic material and oxide magnetic material, which can sufficiently magnetize a high-density magnetic recording medium having high coercive force such as a metal tape. The purpose is to
（発明の構成）
本発明は、予めギヤツプ対向面に巻線溝を形成
した酸化物磁性材料からなる一対のコア半体ブロ
ツクをギヤツプ材を介して突き合わせることによ
りコア主体ブロツクを形成し、このコア主体ブロ
ツクのテープ摺接面となる部分を選択エツチング
により前記ギヤツプ材を残して除去し、このエツ
チングされた部分に合金磁性材料を堆積させて複
合ヘツドブロツクを形成し、この複合ヘツドブロ
ツクを所定の厚みにスライスして複合ヘツドコア
を形成し、この複合ヘツドコアの両側面に補強用
コアを接合したのちテープ摺接面に所定形状に形
成することを特徴とするものである。(Structure of the Invention) The present invention forms a core main block by abutting a pair of core half blocks made of an oxide magnetic material with winding grooves formed in advance on the gap-opposing surfaces with a gap material interposed therebetween. A portion of the core-based block that will be the tape sliding contact surface is removed by selective etching, leaving only the gap material, and an alloy magnetic material is deposited on this etched portion to form a composite headblock. This method is characterized in that a composite head core is formed by slicing the composite head core, reinforcing cores are joined to both sides of the composite head core, and then reinforcing cores are formed into a predetermined shape on the tape sliding surface.
（実施例）
本発明の実施例を第１図乃至第９図を参照して
する。(Example) An example of the present invention will be described with reference to FIGS. 1 to 9.
まず、第１図に示すような直方体形状の、例え
ばフエライト材等の酸化物磁性材料からなるコア
半体ブロツク１のギヤツプ対向面２に、第２図に
示すように巻線溝３を機械加工等により形成す
る。 First, a winding groove 3 is machined as shown in FIG. 2 on the gap facing surface 2 of a core half block 1 made of an oxide magnetic material such as ferrite and having a rectangular parallelepiped shape as shown in FIG. Formed by etc.
次に、そのコア半体ブロツク１のギヤツプ対向
面２を、粒径が1μｍ程度のダイヤモンドパウダ
ーによりRmax100Åに鏡面研磨を行つたのち、
第３図に示すように、スパツタリング等の方法に
よつてギヤツプ材となる酸化シリコン（SiO2）
の薄膜４を0.2〜0.4μｍの厚さに形成する。 Next, the gap facing surface 2 of the core half block 1 was mirror-polished to Rmax 100 Å using diamond powder with a particle size of about 1 μm.
As shown in Figure 3, silicon oxide (SiO 2 ), which becomes the gap material, is made by sputtering or other methods.
A thin film 4 having a thickness of 0.2 to 0.4 μm is formed.
続いて、第４図に示すように、ギヤツプ対向面
に巻線溝が形成されていない直方体形状の酸化物
磁性材料からなるコア半体ブロツク５を、上記コ
ア半体ブロツク１と互いのギヤツプ対向面を向か
い合わせて一定の圧力をかけて固定し、コア主体
ブロツク６を形成する。そして、巻線溝３に棒状
の溶着用ガラス７を差し込んで窒素または不活性
ガス中にて加熱溶着する。なお、コア半体ブロツ
ク５のギヤツプ対向面もコア半体ブロツク１と同
様に鏡面研磨が施されている。 Subsequently, as shown in FIG. 4, a rectangular parallelepiped-shaped core half block 5 made of an oxide magnetic material and having no winding groove formed on the gap-opposing surface is placed between the core half-block 1 and the core half-block 1 so that the gap faces each other. The core-based block 6 is formed by facing each other and fixing them by applying a constant pressure. Then, a bar-shaped welding glass 7 is inserted into the winding groove 3 and welded by heating in nitrogen or inert gas. Note that the gap facing surface of the core half block 5 is also mirror polished like the core half block 1.
次に、上記のようにして得られたコア主体ブロ
ツク６のテープ摺接面となる部分８以外の面に、
耐酸性のワツクス等を用いてマスキングを施し、
塩酸等のエツチング液中に浸してエツチングを行
う。すると、塩酸等のエツチング液は酸化物磁性
材料のみをエツチングするため、第５図に示すよ
うに、ギヤツプ材となる酸化シリコンの膜４はエ
ツチングされずに残る。 Next, on the surface of the core-based block 6 obtained as described above other than the portion 8 that becomes the tape sliding contact surface,
Masking is performed using acid-resistant wax, etc.
Etching is performed by immersing it in an etching solution such as hydrochloric acid. Then, since the etching solution such as hydrochloric acid etches only the oxide magnetic material, the silicon oxide film 4 serving as the gap material remains without being etched, as shown in FIG.
続いて、コア主体ブロツク６のエツチングされ
た部分８ａに、例えばセンダスト合金やアモルフ
アス合金等の合金磁性材料９を、真空蒸着または
スパツタリング等の方法により堆積させ、第６図
に示すような複合ヘツドブロツク１０を形成す
る。 Subsequently, an alloy magnetic material 9 such as sendust alloy or amorphous alloy is deposited on the etched portion 8a of the core-based block 6 by a method such as vacuum deposition or sputtering to form a composite head block 10 as shown in FIG. form.
次に、上記のようにして得られた複合ヘツドブ
ロツク１０を機械加工等によつてスライスし、第
７図に示すような複合ヘツドコア１１を形成す
る。なお、この複合ヘツドコア１１の厚みがその
まま記録トラツク幅になるため、必要であればそ
の両側面をラツプ加工して所定の厚みにする。 Next, the composite head block 10 obtained as described above is sliced by machining or the like to form a composite head core 11 as shown in FIG. Note that since the thickness of this composite head core 11 directly corresponds to the recording track width, both sides thereof are lapped to a predetermined thickness if necessary.
続いて、機械的強度および耐摩耗性を保つた
め、第８図に示すように、複合ヘツドコア１１の
両側面に、例えばセラミツクやガラス等の非磁性
材料からなる補強用コア１２，１２を、例えばエ
ポキシ系接着材等により接着する。 Subsequently, in order to maintain mechanical strength and wear resistance, reinforcing cores 12, 12 made of a non-magnetic material such as ceramic or glass are attached to both sides of the composite head core 11, for example, as shown in FIG. Adhere with epoxy adhesive, etc.
そして、テープ摺接面１３をテープ研磨等の方
法によつて第９図に示すように研磨し、６〜10R
程度の曲率をもたせるとともに、面粗さをRmax
100Å程度に仕上げ、磁気ヘツドが完成する。 Then, the tape sliding contact surface 13 is polished by a method such as tape polishing as shown in FIG.
In addition to providing a certain degree of curvature, the surface roughness is increased to Rmax.
Finished to about 100 Å, the magnetic head is completed.
（発明の効果）
本発明によれば、合金磁性材料のもつ大きい飽
和磁束密度と、酸化物磁性材料のもつ高周波帯域
での高透磁率とを合わせもち、メタルテープ等の
高抗磁力を有する高密度磁気記録媒体を十分磁化
することのできる高性能な磁気ヘツドを得ること
ができる。(Effects of the Invention) According to the present invention, a magnetic material having both the high saturation magnetic flux density of an alloy magnetic material and the high magnetic permeability in a high frequency band of an oxide magnetic material, and having a high coercive force such as a metal tape, A high-performance magnetic head capable of sufficiently magnetizing a density magnetic recording medium can be obtained.
第１図乃至第９図は本発明の磁気ヘツドの製造
方法の一実施例を示す工程図である。
１，５……コア半体ブロツク、２……ギヤツプ
対向面、３……巻線溝、４……ギヤツプ材、６…
…コア主体ブロツク、７……溶着用ガラス、８…
…テープ摺接面となる部分、８ａ……エツチング
された部分、９……合金磁性材料、１０……複合
ヘツドブロツク、１１……複合ヘツドコア、１２
……補強用コア、１３……テープ摺接面。
1 to 9 are process diagrams showing one embodiment of the method for manufacturing a magnetic head of the present invention. 1, 5... Core half block, 2... Gap opposing surface, 3... Winding groove, 4... Gap material, 6...
... Core main block, 7 ... Glass for welding, 8 ...
... Part that becomes the tape sliding surface, 8a ... Etched part, 9 ... Alloy magnetic material, 10 ... Composite head block, 11 ... Composite head core, 12
... Reinforcement core, 13 ... Tape sliding contact surface.
Claims (1)
物磁性材料からなる一対のコア半体ブロツクをギ
ヤツプ材を介して突き合わせることによりコア主
体ブロツクを形成し、このコア主体ブロツクのテ
ープ摺接面となる部分を選択エツチングにより前
記ギヤツプ材を残して除去し、このエツチングさ
れた部分に合金磁性材料を堆積させて複合ヘツド
ブロツクを形成し、この複合ヘツドブロツクを所
定の厚みにスライスして複合ヘツドコアを形成
し、この複合ヘツドコアの両側面に補強用コアを
接合したのちテープ摺接面を所定形状に形成する
ことを特徴とする磁気ヘツドの製造方法。1. A core main block is formed by butting together a pair of core half blocks made of an oxide magnetic material with winding grooves formed on the faces facing the gap through a gap material, and the tape sliding contact surface of this core main block is The gap material is removed by selective etching, an alloy magnetic material is deposited on the etched portion to form a composite headblock, and this composite headblock is sliced to a predetermined thickness to form a composite head core. A method for manufacturing a magnetic head, comprising: bonding reinforcing cores to both sides of the composite head core, and then forming tape sliding surfaces into a predetermined shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23268584A JPS61110311A (en) | 1984-11-05 | 1984-11-05 | Production of magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23268584A JPS61110311A (en) | 1984-11-05 | 1984-11-05 | Production of magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61110311A JPS61110311A (en) | 1986-05-28 |
| JPH0223923B2 true JPH0223923B2 (en) | 1990-05-25 |
Family
ID=16943184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23268584A Granted JPS61110311A (en) | 1984-11-05 | 1984-11-05 | Production of magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61110311A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2613876B2 (en) * | 1986-11-28 | 1997-05-28 | 日本電気株式会社 | Method for manufacturing thin-film magnetic head |
-
1984
- 1984-11-05 JP JP23268584A patent/JPS61110311A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61110311A (en) | 1986-05-28 |
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