JPH04245002A - Manufacture of magnetic head core - Google Patents
Manufacture of magnetic head coreInfo
- Publication number
- JPH04245002A JPH04245002A JP1047491A JP1047491A JPH04245002A JP H04245002 A JPH04245002 A JP H04245002A JP 1047491 A JP1047491 A JP 1047491A JP 1047491 A JP1047491 A JP 1047491A JP H04245002 A JPH04245002 A JP H04245002A
- Authority
- JP
- Japan
- Prior art keywords
- core
- glass
- core block
- magnetic
- chip
- 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 10
- 239000011521 glass Substances 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 4
- 230000004907 flux Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 229910001004 magnetic alloy Inorganic materials 0.000 abstract description 4
- 229910000702 sendust Inorganic materials 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、高飽和磁束密度で積
層型薄膜コアを用いるＳ−ＶＨＳやＨＤＴＶ−ＶＴＲの
ラミネート型ヘッドコアの製造方法に関し、特にコアブ
ロックへのガラスモールドの技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a laminated head core for an S-VHS or HDTV-VTR using a laminated thin film core with a high saturation magnetic flux density, and more particularly to a technique for glass molding a core block.
【０００２】0002
【従来の技術】最近、Ｓ−ＶＨＳＶＴＲヘッド，ＨＤＴ
Ｖ−ＶＴＲヘッドに使用されている積層薄膜コアを用い
るいわゆるラミネート型磁気ヘッドは、コアの形態とし
て図２に示すように非磁性体基板５に、高飽和磁束密度
材であるセンダスト等の磁性合金膜６を何層か付着形成
して得たコアブロック７を用いて作られている。従来図
６のコアチップを得るために図５に示すＣコア側になる
Ｂコアブロック３Ｉコア側になるＡコアブロック４への
ガラスモールドは両コアブロックとも同一特性例えば同
一組成で同一熱膨張係数のモールドガラス１５を使用し
ていた。[Prior Art] Recently, S-VHS VTR heads, HDT
A so-called laminate magnetic head using a laminated thin film core used in a V-VTR head has a core formed of a magnetic alloy such as Sendust, which is a high saturation magnetic flux density material, on a non-magnetic substrate 5 as shown in FIG. It is made using a core block 7 obtained by depositing several layers of membrane 6. Conventionally, in order to obtain the core chip shown in FIG. 6, glass molding is applied to the B core block 3 which becomes the C core side shown in FIG. 5, and the A core block 4 which becomes the I core side. Molded glass 15 was used.
【０００３】0003
【発明が解決しようとする課題】しかしながら上記図５
のようにＡコアブロック４，Ｂコアブロック３とも同じ
モールドガラス５を使用した場合，熱膨張係数を非磁性
体基板５に合わせると、図６（ａ）のようにコアチップ
１０のデプスエンド１１付近のガラスにクラック１６１
が、また逆に非磁性体基板よりも約１０×１０−７／
ｄｅｇ 高い熱膨張係数のモールドガラスを用いると図
６（ｂ）のようにコアチップ１０の側面にクラック１６
２ が発生しこのためチップ割れなどにより歩留りが低
下するという問題があった。尚非磁性体基板５より低い
熱膨張係数のモールドガラスを使用するとデプスエンド
１１，コアチップ１０の側面の両方にクラック１６が生
じるため使用することはできない。[Problem to be solved by the invention] However, the above figure 5
When the same molded glass 5 is used for both the A core block 4 and the B core block 3 as shown in FIG. Crack 161 on the glass of
However, on the contrary, it is about 10×10-7/
deg If molded glass with a high coefficient of thermal expansion is used, cracks 16 will occur on the side surface of the core chip 10 as shown in FIG. 6(b).
2 occurs, which causes a problem of lower yield due to chip cracking and the like. Note that if a molded glass having a coefficient of thermal expansion lower than that of the non-magnetic substrate 5 is used, cracks 16 will occur on both the depth end 11 and the side surface of the core chip 10, so it cannot be used.
【０００４】0004
【課題を解決するための手段】この発明は上記の課題を
解決するためにＩコア側になるコアブロックに熱膨張係
数が非磁性体基板と合ったモールドガラスを、巻線挿通
窓兼間磁路設用を形成したＣコア側になるコアブロック
に非磁性体基板よりも約１０×１０−７／ｄｅｇ 高い
熱膨張係数のモールドガラスを用いることを特徴とする
。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a core block on the I-core side with a molded glass whose coefficient of thermal expansion matches that of the non-magnetic substrate. It is characterized by using molded glass having a coefficient of thermal expansion approximately 10 x 10-7/deg higher than that of the non-magnetic substrate for the core block on the C-core side where the roadway is formed.
【０００５】[0005]
【作用】上記のＩコア側，Ｃコア側のそれぞれのコアブ
ロックにガラスモールドを行う際、異なる熱膨張係数を
もったモールドガラスを用いることにより、コアチップ
の部分によって異なって発生する応力を緩和することが
できる。その結果チップ全体のガラス部のクラックを発
生させにくくする作用がある。[Function] When performing glass molding on each of the core blocks on the I-core side and C-core side, mold glasses with different coefficients of thermal expansion are used to alleviate stress that occurs differently depending on the part of the core chip. be able to. As a result, it has the effect of making it difficult for cracks to occur in the glass portion of the entire chip.
【０００６】[0006]
【実施例】図１，図２，図３に本発明の磁気ヘッドコア
の製造方法の一実施例を示す。まずはじめに図２の非磁
性体基板５にセンダスト等の磁性合金膜６が付着形成さ
れたコアブロック７に図１のようにガラス溝を設け、そ
の溝の上にＩコア側になるＡコアブロック４には熱膨張
係数が非磁性体基板５に合ったＡモールドガラス２を、
Ｃコア側になるＢコアブロック３には非磁性体基板５よ
り熱膨張係数が高いＢモールドガラス１をのせて真空炉
中で加熱しモールド済Ａコアブロック９，モールド済Ｂ
コアブロック８を得る。それらコアブロックは鏡面ラッ
プ，ギャップ形成などの各工程を経て、突き合わせ溶着
させて、個々のコアにスライス処理その他の加工をして
、チップ全体のガラス部に、クラックのない図３のコア
チップ１０を得る。尚Ａモールドガラス２とＢモールド
ガラス１の作業温度はほぼ等しくなければならないので
モールドガラス選定時屈伏点，転移点を考慮する必要が
ある。Embodiment FIGS. 1, 2, and 3 show an embodiment of the method for manufacturing a magnetic head core of the present invention. First of all, a glass groove is provided as shown in FIG. 1 in the core block 7 in which a magnetic alloy film 6 such as sendust is adhered to a non-magnetic substrate 5 shown in FIG. A molded glass 2 whose thermal expansion coefficient matches that of the non-magnetic substrate 5 is placed in 4.
B mold glass 1, which has a higher coefficient of thermal expansion than the non-magnetic substrate 5, is placed on the B core block 3 on the C core side and heated in a vacuum furnace to form a molded A core block 9 and a molded B core block.
Obtain core block 8. These core blocks go through various processes such as mirror lapping and gap formation, are butt welded, and each core is subjected to slicing and other processing to form a crack-free core chip 10 as shown in Fig. 3 in the glass portion of the entire chip. obtain. Incidentally, since the working temperatures of mold glass A 2 and mold glass B 1 must be approximately equal, it is necessary to consider the yielding point and transition point when selecting the mold glass.
【０００７】[0007]
【実施例２】図４に本発明の磁気ヘッドコア製造方法の
第２実施例を示す。図２のコアブロック７を得るまでは
第１実施例と同様であるめ説明を省略する。コアブロッ
ク７にガラス溝１３，一方はコアブロック７に巻線挿通
窓兼間磁路形成用の窓１２を設け、さらに両ブロックは
鏡面ラップ，ギャップ形成を経て突合わせを行い図４の
突合わせ済コアブロック１４を得る。その突合わせ済コ
アブロック１４のバックギャップ側ガラス溝１３には熱
膨張係数が非磁性体基板５に合ったＡモールドガラス２
を、フロントギャップ側窓１２にはそれより熱膨張係数
が高いＢモールドガラス１をそれぞれ挿入する。その後
真空炉中で加熱して突き合わせ溶着し、摺動面加工，ス
ライス加工を経てチップ全体のガラス部にクラックのな
い図３のコアチップ１０を得る。Embodiment 2 FIG. 4 shows a second embodiment of the magnetic head core manufacturing method of the present invention. The steps up to obtaining the core block 7 in FIG. 2 are the same as those in the first embodiment, and therefore the explanation will be omitted. A glass groove 13 is provided in the core block 7, and a window 12 is provided in the core block 7 to serve as a window for winding insertion and to form a magnetic path between the two blocks.Furthermore, both blocks are mirror-wrapped, gap-formed, and then butted together as shown in Fig. 4. A completed core block 14 is obtained. A molded glass 2 whose thermal expansion coefficient matches that of the non-magnetic substrate 5 is provided in the back gap side glass groove 13 of the butted core block 14.
B mold glass 1 having a higher coefficient of thermal expansion is inserted into the front gap side window 12. Thereafter, the core chip 10 shown in FIG. 3 is obtained by heating in a vacuum furnace, butt welding, sliding surface processing and slicing, and having no cracks in the glass portion of the entire chip.
【０００８】[0008]
【発明の効果】以上説明したようにＩコア側とＣコア側
に異なる熱膨張係数をもつモールドガラスを用いること
により、完成したコアチップのガラス部のクラックを発
生させにくくすると同時に大幅に歩留りを向上すること
ができるという優れた効果がある。[Effects of the Invention] As explained above, by using molded glasses with different coefficients of thermal expansion on the I core side and the C core side, it is difficult to generate cracks in the glass portion of the completed core chip, and at the same time, the yield is significantly improved. It has the excellent effect of being able to
【図１】（ａ），（ｂ） 本発明の第１実施例を示す
各コアブロックの斜視図[Fig. 1] (a), (b) Perspective views of each core block showing a first embodiment of the present invention.
【図２】 本発明に使用するコアブロックを拡大した
斜視図[Fig. 2] An enlarged perspective view of the core block used in the present invention
【図３】 本発明によって得られたコアチップの斜視
図[Figure 3] Perspective view of the core chip obtained by the present invention
【図４】 本発明の他の実施例を示し突き合わせ済
コアブロックの斜視図[Fig. 4] A perspective view of a butted core block showing another embodiment of the present invention.
【図５】（ａ），（ｂ） 従来の磁気ヘッド製造方法
を示す各コアブロックの斜視図[Figure 5] (a), (b) Perspective views of each core block showing the conventional magnetic head manufacturing method
【図６】 従来の磁気ヘッド製造方法によって得られ
たコアチップの要部斜視図[Figure 6] A perspective view of the main parts of a core chip obtained by a conventional magnetic head manufacturing method.
１ Ｂモールドガラス ２ Ａモールドガラス ３ Ｂコアブロック ４ Ａコアブロック ５ 非磁性体基板 ６ 磁性合金膜 ７ コアブロック ８ モールド済Ｂコアブロック ９ モールド済Ａコアブロック １０ コアチップ １１ デプスエンド １２ 巻線窓 １３ ガラス溝 １４ 突合わせ済コアブロック １５ モールドガラス １６ クラック 1 B mold glass 2 A mold glass 3 B core block 4 A core block 5 Non-magnetic substrate 6 Magnetic alloy film 7 Core block 8 Molded B core block 9 Molded A core block 10 Core chip 11 Depth End 12 Winding window 13 Glass groove 14 Butted core block 15 Molded glass 16 Crack
Claims (2)
を、非磁性体基板で挟み付けしたコアを突き合わせて作
る磁気ヘッドコアの製造方法において、突き合わせる一
方のコアと他方のコアに、各々異なる熱膨張係数のモー
ルドガラスを予めモールドしておき、突き合わせ溶着す
ることを特徴とする磁気ヘッドコアの製造方法。Claims: 1. A method for manufacturing a magnetic head core in which a stack of high saturation magnetic flux density soft magnetic thin films is sandwiched between non-magnetic substrates and the cores are butted together. A method for manufacturing a magnetic head core, which comprises molding mold glasses having different coefficients of thermal expansion in advance and butt welding them together.
を、非磁性体基板で挟み付けしたコアを突き合わせて作
る磁気ヘッドコアの製造方法において、予め一方のコア
と他方とを突き合わせておき、フロントギャップとバッ
クギャップとに各々異なる熱膨張係数のガラスを埋め込
んで、突き合わせ溶着することを特徴とする磁気ヘッド
コアの製造方法。2. A method for manufacturing a magnetic head core in which cores made of laminated high saturation magnetic flux density soft magnetic thin films sandwiched between non-magnetic substrates are butted together, in which one core is butted against the other in advance; A method for manufacturing a magnetic head core, which comprises embedding glasses having different coefficients of thermal expansion in a front gap and a back gap, and then butt welding the glasses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1047491A JPH04245002A (en) | 1991-01-31 | 1991-01-31 | Manufacture of magnetic head core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1047491A JPH04245002A (en) | 1991-01-31 | 1991-01-31 | Manufacture of magnetic head core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04245002A true JPH04245002A (en) | 1992-09-01 |
Family
ID=11751145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1047491A Pending JPH04245002A (en) | 1991-01-31 | 1991-01-31 | Manufacture of magnetic head core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04245002A (en) |
-
1991
- 1991-01-31 JP JP1047491A patent/JPH04245002A/en active Pending
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