JPH0585964B2 - - Google Patents
Info
- Publication number
- JPH0585964B2 JPH0585964B2 JP61051456A JP5145686A JPH0585964B2 JP H0585964 B2 JPH0585964 B2 JP H0585964B2 JP 61051456 A JP61051456 A JP 61051456A JP 5145686 A JP5145686 A JP 5145686A JP H0585964 B2 JPH0585964 B2 JP H0585964B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- thin film
- metal thin
- ferromagnetic metal
- head core
- 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 claims description 49
- 230000005294 ferromagnetic effect Effects 0.000 claims description 45
- 239000010409 thin film Substances 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 239000011521 glass Substances 0.000 claims description 24
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、強磁性金属薄膜をガラスで包み込
み、該ガラスで磁気ヘツドコア半体同士を接合し
て、接合強度を向上させ、加工歩留および電磁変
換特性の向上を図つた、磁気ヘツドに関するもの
である。[Detailed Description of the Invention] [Industrial Application Field] The present invention involves wrapping a ferromagnetic metal thin film in glass and bonding the magnetic head core halves together using the glass to improve bonding strength and improve processing yield. This invention relates to a magnetic head with improved electromagnetic conversion characteristics.
従来、高密度記録に対応する磁気ヘツドとし
て、強磁性酸化物材料と強磁性金属材料とを複合
した、いわゆる複合型磁気ヘツドが用いられてい
るが、この種の磁気ヘツドとして第５図に示すよ
うなものが知られている。すなわち、第５図ａに
示すように、強磁性酸化物、例えばフエライトよ
りなる磁気ヘツドコア半体１のギヤツプ側の先端
部一側面にスパツタリング等によつてセンダスト
等の強磁性金属薄膜２を被着形成し、磁気ヘツド
コア半体１のギヤツプ側の先端部他側面と強磁性
金属薄膜２との間にガラス３をモールドしたも
の、または第５図ｂに示すように、磁気ヘツドコ
ア半体１のギヤツプ側の先端部側面に強磁性金属
薄２を被着形成し、強磁性金属薄膜２の間にガラ
ス３をモールドしたものである。いずれも、磁気
ヘツドコア半体１は強磁性金属薄膜２を介在して
接合しており、ギヤツプ形成面と強磁性金属薄膜
形成面とは一定角度で傾斜している。また、強磁
性金属薄膜２は磁気ヘツドコアを横断して磁気ヘ
ツドコア厚全体に及んでいる。さらに、ギヤツプ
Ｇは、強磁性金属薄膜２、ガラス３から形成され
ているギヤツプ形成面をSiO2等の非磁性体から
なるギヤツプスペーサを介して接合して形成され
ている。
Conventionally, a so-called composite magnetic head, which is a composite of a ferromagnetic oxide material and a ferromagnetic metal material, has been used as a magnetic head compatible with high-density recording. An example of this type of magnetic head is shown in Fig. 5. Something like this is known. That is, as shown in FIG. 5a, a ferromagnetic metal thin film 2 such as sendust is deposited on one side of the tip end on the gap side of a magnetic head core half 1 made of a ferromagnetic oxide such as ferrite by sputtering or the like. 5b, and a glass 3 is molded between the other side of the gap-side tip of the magnetic head core half 1 and the ferromagnetic metal thin film 2, or as shown in FIG. 5b, the gap of the magnetic head core half 1 is A ferromagnetic metal thin film 2 is formed on the side surface of the ferromagnetic metal thin film 2, and a glass 3 is molded between the ferromagnetic metal thin films 2. In both cases, the magnetic head core halves 1 are joined with a ferromagnetic metal thin film 2 interposed therebetween, and the gap forming surface and the ferromagnetic metal thin film forming surface are inclined at a constant angle. Further, the ferromagnetic metal thin film 2 traverses the magnetic head core and extends over the entire thickness of the magnetic head core. Further, the gap G is formed by joining gap forming surfaces formed of a ferromagnetic metal thin film 2 and glass 3 via a gap spacer made of a non-magnetic material such as SiO 2 .
従来技術においては、磁気ヘツドコア半体１
は、ギヤツプ側の先端部の一側面または両側面に
被着形成されていて磁気ヘツドコア厚全体に及ん
でいる強磁性金属薄膜２を介して接合されている
ため、その接合強度は強磁性金属薄膜２の被着強
度によつて左右される。一方、強磁性金属薄膜２
の被着強度は、被着面の仕上げの仕方等薄膜形成
の条件によつてバラツキを生じ、強磁性金属薄膜
２の剥離が生じ易い。強磁性金属薄膜２の剥離が
生じた場合、強磁性金属薄膜２はギヤツプ側の先
端部の一側面または両側面に被着形成されてい
て、磁気ヘツドコア厚全体に及んでいるので、接
合強度は著しく低下し、加工歩留および電磁変換
特性が低下するという問題点がある。
In the prior art, the magnetic head core half 1
are bonded via a ferromagnetic metal thin film 2 that is formed on one or both sides of the tip on the gap side and extends over the entire thickness of the magnetic head core, so the bond strength is greater than that of the ferromagnetic metal thin film. It depends on the adhesion strength of No.2. On the other hand, ferromagnetic metal thin film 2
The adhesion strength of the ferromagnetic metal thin film 2 varies depending on the thin film formation conditions such as the finishing method of the adhering surface, and peeling of the ferromagnetic metal thin film 2 is likely to occur. If peeling of the ferromagnetic metal thin film 2 occurs, the bonding strength will be reduced because the ferromagnetic metal thin film 2 is formed on one or both sides of the tip on the gap side and covers the entire thickness of the magnetic head core. There is a problem that the processing yield and electromagnetic conversion characteristics are significantly reduced.
この発明は、このような従来技術の問題点を解
決する目的でなされたものである。 The present invention was made to solve the problems of the prior art.
上記問題点を解決するための手段を、実施例に
対応する第１図を用いて以下説明する。この発明
は、強磁性酸化物よりなる磁気ヘツドコア半体１
１が強磁性金属薄膜１２を介して突き合わせ接合
されている磁気ヘツドにおいて、強磁性金属薄膜
１２が磁気ヘツドアドレス厚全体に及ぼすキヤツ
プ近傍のみに存在するとともに、強磁性金属薄膜
１２を包み込むガラス１３で該磁気ヘツドコア半
体１１同士を接合したものである。
Means for solving the above problems will be explained below using FIG. 1 corresponding to the embodiment. This invention provides a magnetic head core half 1 made of ferromagnetic oxide.
1 are butt-jointed via a ferromagnetic metal thin film 12, the ferromagnetic metal thin film 12 exists only in the vicinity of the cap that affects the entire magnetic head address thickness, and the glass 13 that surrounds the ferromagnetic metal thin film 12 exists. The magnetic head core halves 11 are joined together.
このように構成されたものにおいては、強磁性
金属薄膜１２は磁気ヘツドコア厚全体に及ぼすギ
ヤツプ近傍のみに存在し、ガラス１３によつて包
み込まれているので、強磁性金属薄膜１２の被着
強度は磁気ヘツドコア半体１１同士の接合強度に
影響を与えない。また、磁気ヘツドコア半体１１
同士は強磁性金属薄膜１２を包み込むガラス１３
によつて接合されているので、その接合強度は大
きい。
In this structure, the ferromagnetic metal thin film 12 exists only near the gap in the entire magnetic head core thickness and is surrounded by the glass 13, so the adhesion strength of the ferromagnetic metal thin film 12 is This does not affect the bonding strength between the magnetic head core halves 11. In addition, the magnetic head core half 11
The glass 13 envelops the ferromagnetic metal thin film 12.
The bonding strength is high.
第１図はこの発明の一実施例を示す図である。
第１図において、１１は磁気ヘツドコア半体、１
２は強磁性金属薄膜、１３はガラスである。
FIG. 1 is a diagram showing an embodiment of the present invention.
In FIG. 1, 11 is a magnetic head core half, 1
2 is a ferromagnetic metal thin film, and 13 is glass.
強磁性金属薄膜１２は磁気ヘツドコア厚全体に
及ばずギヤツプ近傍のみ存在する。そして、一部
は磁気ヘツドコア半体１１に被着されているが、
大部分はガラス１３によつて包み込まれている。
磁気ヘツドコア半体１１同士は、大部分ガラス１
３によつて接合されている。したがつて、強磁性
金属薄膜１２の被着強度は磁気ヘツドコア半体１
１同士の接合強度に影響を与えず、磁気ヘツドコ
ア半体１１とガラス１３との接合強度は大きい。
ガラス１３は、接合強度を大きくすため、強磁性
酸化物１１に熱膨脹係数の点で適合したものが選
択されている。熱膨脹係数が105×10-7／℃の強
磁性酸化物１１に対して熱膨脹係数が96×10-7／
℃のガラス１３、熱膨脹係数が115×10-7／℃の
強磁性酸化物１１に対して熱膨脹係数が100×
10-7／℃のガラス１３が選択されている。 The ferromagnetic metal thin film 12 does not cover the entire thickness of the magnetic head core, but exists only near the gap. A part of it is attached to the magnetic head core half 11,
Most of it is surrounded by glass 13.
Most of the magnetic head core halves 11 are made of glass 1.
3. Therefore, the adhesion strength of the ferromagnetic metal thin film 12 is greater than that of the magnetic head core half 1.
The bonding strength between the magnetic head core halves 11 and the glass 13 is high without affecting the bonding strength between the magnetic head core halves 11 and the glass 13.
The glass 13 is selected to be compatible with the ferromagnetic oxide 11 in terms of coefficient of thermal expansion in order to increase bonding strength. Ferromagnetic oxide 11 has a thermal expansion coefficient of 105×10 -7 /°C, whereas the thermal expansion coefficient is 96×10 -7 /°C.
Glass 13 has a thermal expansion coefficient of 115×10 -7 /℃ and ferromagnetic oxide 11 has a thermal expansion coefficient of 100×
Glass 13 with a temperature of 10 -7 /°C is selected.
次にこの発明に係る磁気ヘツドの製造過程を第
２図を用いて説明する。 Next, the manufacturing process of the magnetic head according to the present invention will be explained with reference to FIG.
まず、(a)に示すように磁気ヘツドコア半体１１
の母材となる磁気ヘツドコア半体ブロツク１１′
のギヤツプ対向面１１′Ａに断面Ｖ字状のＶ溝１
１′Ｂを一定間隔をもつて複数形成する。次に、
(b)に示すようにＶ溝１１′Ｂにガラス１３をモー
ルドし、ギヤツプ対向面１１′Ａを平面研磨する。
次に、(c)に示すようにＶ溝１１′Ｂとオーバーラ
ツプするようにギヤツプ対向面１１′Ａに断面Ｖ
字状のＶ溝１１′Ｃを複数形成する。次に、(d)に
示すようにＶ溝１１′Ｃの表面に強磁性金属薄膜
１２を形成する。ギヤツプ対向面１１′Ａおよび
ガラス１３に形成された強磁性金属薄膜１２を削
除する。次に、(e)に示すようにギヤツプ対向面１
１′Ａに断面角形状の角溝１１′Ｄを形成し、不必
要な強磁性金属薄膜１２を除去する。次に、(f)に
示すように角溝１１′Ｄにガラス１３をモールド
し、ギヤツプ対向面１１′Ａを平面研磨するとと
もにギヤツプ対向面１１′ＡにＶ溝１１′Ｂと直交
する巻線用溝１１′Ｅを形成する。次に、(g)に示
すようにギヤツプ対向面１１′Ａにギヤツプスペ
ーサ１１′Ｆを形成する。次に、上記と同様の過
程を経て巻線用溝のない磁気ヘツドコア半体ブロ
ツク１１″を形成する。次に、(h)に示すように磁
気ヘツドコア半体ブロツク１１′，１１″を突き合
わせ、ガラス１３、ギヤツプスペーサ１１′Ｆの
溶着により磁気ヘツドコアブロツク１４を形成す
る。次に、磁気ヘツドコアブロツク１４をアジマ
ス角度でスライス（一点鎖線で図示）して、(i)に
示すような磁気ヘツドコア１５を形成する。次
に、磁気ヘツドコア１５のテープ走行面１５Ａを
円筒研磨し、巻線を装着することによつて磁気ヘ
ツドは完成する。 First, as shown in (a), the magnetic head core half 11
Magnetic head core half block 11' which is the base material of
A V-shaped groove 1 with a V-shaped cross section is provided on the gap facing surface 11'A.
A plurality of 1'B's are formed at regular intervals. next,
As shown in (b), glass 13 is molded into the V-groove 11'B, and the gap facing surface 11'A is polished.
Next, as shown in (c), a cross section V is formed on the gap facing surface 11'A so as to overlap with the V groove 11'B.
A plurality of letter-shaped V grooves 11'C are formed. Next, as shown in (d), a ferromagnetic metal thin film 12 is formed on the surface of the V-groove 11'C. The ferromagnetic metal thin film 12 formed on the gap facing surface 11'A and the glass 13 is removed. Next, as shown in (e), the gap facing surface 1
A square groove 11'D having a square cross section is formed in 1'A, and unnecessary ferromagnetic metal thin film 12 is removed. Next, as shown in (f), glass 13 is molded in the square groove 11'D, the gap facing surface 11'A is polished, and the winding is perpendicular to the V groove 11'B on the gap facing surface 11'A. A groove 11'E is formed. Next, as shown in (g), a gear spacer 11'F is formed on the gap facing surface 11'A. Next, a magnetic head core half block 11'' without a winding groove is formed through the same process as above.Next, as shown in (h), the magnetic head core half blocks 11' and 11'' are butted together, A magnetic head core block 14 is formed by welding the glass 13 and the gear spacer 11'F. Next, the magnetic head core block 14 is sliced at an azimuth angle (indicated by a dashed line) to form a magnetic head core 15 as shown in (i). Next, the tape running surface 15A of the magnetic head core 15 is cylindrically polished and a winding is attached to complete the magnetic head.
以上の実施例では強磁性金属薄膜１２は一本で
あるが、第３図に示すように、Ｘ字状に形成して
もよい。その製造過程を第４図に示すが、第２図
との相違のみを示し、記号は第２図と同じであ
る。 In the above embodiment, there is only one ferromagnetic metal thin film 12, but it may be formed in an X-shape as shown in FIG. The manufacturing process is shown in FIG. 4, only the differences from FIG. 2 are shown, and the symbols are the same as in FIG. 2.
以上説明してきたように、この発明は、強磁性
金属薄膜が磁気ヘツドコア厚全体に及ぼすギヤツ
プ近傍のみに存在するとともに、該強磁性金属薄
膜を包み込むガラスで磁気ヘツドコア半体同士を
接合したものである。それゆえ、強磁性金属薄膜
の被着強度は磁気ヘツドコア半体同士の接合強度
に影響を与えず、ガラスによつて磁気ヘツドコア
半体同士は接合されるので接合強度は大きい。し
たがつて、この発明によれば、加工歩留および電
磁変換特性は向上するという効果が得られる。
As explained above, in this invention, the ferromagnetic metal thin film exists only in the vicinity of the gap that affects the entire thickness of the magnetic head core, and the magnetic head core halves are bonded together with glass that wraps the ferromagnetic metal thin film. . Therefore, the adhesion strength of the ferromagnetic metal thin film does not affect the bonding strength between the magnetic head core halves, and since the magnetic head core halves are bonded to each other by glass, the bonding strength is high. Therefore, according to the present invention, the processing yield and electromagnetic conversion characteristics are improved.
第１図はこの発明の一実施例を示すテープ走行
面を示す表面図、第２図は第１図に示す磁気ヘツ
ドの製造過程を示す斜視図、第３図はこの発明の
他の実施例を示すテープ走行面の平面図、第４図
は第３図に示す磁気ヘツドの製造過程を示す断面
図、第５図ａ，ｂは従来技術を示すテープ走行面
の平面図である。
１１……磁気ヘツドコア半体、１２……強磁性
金属薄膜、１３……ガラス。
FIG. 1 is a surface view showing a tape running surface showing one embodiment of the invention, FIG. 2 is a perspective view showing the manufacturing process of the magnetic head shown in FIG. 1, and FIG. 3 is another embodiment of the invention. 4 is a sectional view showing the manufacturing process of the magnetic head shown in FIG. 3, and FIGS. 5a and 5b are plan views of the tape running surface showing the prior art. 11...Magnetic head core half, 12...Ferromagnetic metal thin film, 13...Glass.
Claims (1)
強磁性金像薄膜を介して突き合わせ接合されてい
る磁気ヘツドにおいて、強磁性金属薄膜が磁気ヘ
ツドコア厚全体に及ばずギヤツプ近傍のみに存在
するとともに、該強磁性金属薄膜を包み込むガラ
スで該磁気ヘツドコア半体同士を接合したことを
特徴とする磁気ヘツド。1. In a magnetic head in which magnetic head core halves made of ferromagnetic oxide are butt-joined via a ferromagnetic gold image thin film, the ferromagnetic metal thin film does not cover the entire thickness of the magnetic head core but exists only in the vicinity of the gap; 1. A magnetic head characterized in that the magnetic head core halves are joined to each other by glass surrounding a ferromagnetic metal thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5145686A JPS62209705A (en) | 1986-03-11 | 1986-03-11 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5145686A JPS62209705A (en) | 1986-03-11 | 1986-03-11 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62209705A JPS62209705A (en) | 1987-09-14 |
| JPH0585964B2 true JPH0585964B2 (en) | 1993-12-09 |
Family
ID=12887435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5145686A Granted JPS62209705A (en) | 1986-03-11 | 1986-03-11 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62209705A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02132612A (en) * | 1988-11-12 | 1990-05-22 | Sanyo Electric Co Ltd | Manufacture of magnetic head |
| JP2801678B2 (en) * | 1989-09-20 | 1998-09-21 | 株式会社東芝 | Manufacturing method of magnetic head |
| JPH0624045B2 (en) * | 1989-10-03 | 1994-03-30 | 日本碍子株式会社 | Method for manufacturing composite magnetic head core |
| JPH03222109A (en) * | 1990-01-25 | 1991-10-01 | Sharp Corp | Production of magnetic head |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58175122A (en) * | 1982-04-07 | 1983-10-14 | Hitachi Ltd | Compound magnetic head and its production |
-
1986
- 1986-03-11 JP JP5145686A patent/JPS62209705A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58175122A (en) * | 1982-04-07 | 1983-10-14 | Hitachi Ltd | Compound magnetic head and its production |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62209705A (en) | 1987-09-14 |
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