JPS6345147A - Bonding glass for magnetic head - Google Patents
Bonding glass for magnetic headInfo
- Publication number
- JPS6345147A JPS6345147A JP18698086A JP18698086A JPS6345147A JP S6345147 A JPS6345147 A JP S6345147A JP 18698086 A JP18698086 A JP 18698086A JP 18698086 A JP18698086 A JP 18698086A JP S6345147 A JPS6345147 A JP S6345147A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- coefficient
- thermal expansion
- bonding
- magnetic head
- 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.)
- Granted
Links
- 239000011521 glass Substances 0.000 title claims abstract description 71
- 239000000203 mixture Substances 0.000 claims abstract description 9
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 229910011255 B2O3 Inorganic materials 0.000 abstract description 4
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 abstract description 3
- 230000009477 glass transition Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 3
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 235000012239 silicon dioxide Nutrition 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 description 13
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229910000859 α-Fe Inorganic materials 0.000 description 8
- 229910000702 sendust Inorganic materials 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000004017 vitrification Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000007499 fusion processing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明：よ、フェライトや強（ｎ性金属材ｔ−１等の融
着に使用される磁気ヘッド用ボンディングガラスに関す
るものであり、例えば磁気ヘッドのギャップ形成に好適
なボンディングガラスに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bonding glass for a magnetic head used for fusing ferrite, strong (n-type metal material T-1, etc.), such as magnetic The present invention relates to a bonding glass suitable for forming a gap in a head.
本発明は、磁気ヘッド用ボンディングガラスをＰ ｂ
Ｏ，Ｓ ｌ ０２１ Ｂ２Ｏ３＋ Ｂ １２０３及びＮ
ａ、０を含有するガラス組成物とし、
熱膨張係数の制御を図り、同時に信較性ならびに作業温
度の確保を図ろうとするものである。The present invention provides bonding glass for a magnetic head with P b
O, S l 021 B2O3+ B 1203 and N
The objective is to create a glass composition containing a and 0, control the coefficient of thermal expansion, and at the same time ensure reliability and working temperature.
一般に６ｎ気ヘツドは、Ｍｎ−Ｚｎフェライト等の酸化
物磁性材料やこれら酸化物磁性材料とセンダスト等の金
属磁性材料との複合体よりなる磁気コア同士を、ボンデ
ィングガラスを用いて接合一体化することにより構成さ
れる。例えば、磁気ヘッドの作動ギャップ部は、ボンデ
ィングガラスを融点以上のかなりの高温まで加熱・溶解
し、磁気コアの間に流し込ませてから冷却した後、これ
ら磁気コア間にガラスを融着させることによって構成さ
れる。In general, 6n magnetic heads are made by bonding magnetic cores made of oxide magnetic materials such as Mn-Zn ferrite or composites of these oxide magnetic materials and metal magnetic materials such as sendust using bonding glass. Consisted of. For example, the operating gap of a magnetic head is created by heating and melting bonding glass to a considerably high temperature above its melting point, pouring it between magnetic cores, cooling it, and then fusing the glass between these magnetic cores. configured.
かかるボンディングガラスには、耐水性、耐蝕性、耐摩
耗性、接合強度等の点で厳しい特性が要求され、例えば
特開昭６１−１０１４３２号公報にはＰ ｂ Ｏ，Ｓ
ｉ Ｏｚ等を主成分とするボンディングガラスが提案さ
れている。Such bonding glass is required to have strict properties in terms of water resistance, corrosion resistance, abrasion resistance, bonding strength, etc.
A bonding glass whose main component is iOz or the like has been proposed.
ところで、従来のボンディングガラスは、通常熱膨張係
数が９０ Ｘ １０−’ （’Ｃ−’）前後で、軟化温
度が５００℃前後のものが多く、これらのボンディング
ガラスは酸化物磁性材料や金属磁性材料と熱膨張係数が
大きく異なることから、磁気コアを接合したときに残留
応力が累積され、ガラスクランク等が発生し易いという
欠点を有している。By the way, conventional bonding glasses usually have a thermal expansion coefficient of around 90 x 10-'('C-') and a softening temperature of around 500°C, and these bonding glasses are made of oxide magnetic materials or metal magnetic materials. Since the material and the coefficient of thermal expansion are significantly different from each other, residual stress is accumulated when the magnetic cores are joined, and glass cranks are likely to occur.
したがって、フェライト等の酸化物磁性材料や金、属磁
性材料を接着するボンディングガラスは、熱膨張係数を
これらの被接着体に合わせるため、その熱膨張係数が９
０Ｘ１０−’〜１３０Ｘ１０−’〔℃４〕程度のものを
使用することが好ましい。Therefore, bonding glass for bonding oxide magnetic materials such as ferrite, gold, and metal magnetic materials has a thermal expansion coefficient of 9 to match the thermal expansion coefficient of these objects.
It is preferable to use one having a temperature of about 0.times.10-' to 130.times.10-' [° C.4].
しかしながら、−１！ＩＱにガラスの熱膨張係数を太き
くすればするほど低融点になる傾向シこあり、熱膨張係
数がｉ ｌ ＯＸ １０−’ Ｃ℃−’〕以上のガラス
で清書な磁気ヘッドを作製することは不可能であった。However, -1! There is a tendency that the thicker the coefficient of thermal expansion of glass, the lower the melting point. Therefore, a magnetic head with good quality should be manufactured using glass with a coefficient of thermal expansion of 10-'C°C-' or more. was impossible.
また、低融点のガラスは信頼性の悪いもので、耐水性や
硬度が高融点ガラスに比べて著しく劣り、磁気ヘッド加
工時にガラス溶出やガラスクラックが多発するという問
題を抱えている。Furthermore, low melting point glass is unreliable, and has significantly inferior water resistance and hardness compared to high melting point glass, and has the problem of frequent glass elution and glass cracking during magnetic head processing.
Ｃ発明が解決しようとする問題点］
このように、従来のボンディングガラスでは熱膨張係数
や信頼性等の点で問題が多く、その改善が待たれていた
。Problems to be Solved by Invention C] As described above, conventional bonding glasses have many problems in terms of coefficient of thermal expansion, reliability, etc., and improvements have been awaited.
そこで本発明は、かかる従来の実情に鑑みて提案された
ものであって、執膨張係数を磁気コアの材質に合わせて
制御することが可能で、同時に軟化温度や信顧性の確保
が可能なボンディングガラスを提供することを目的とす
る。Therefore, the present invention was proposed in view of the conventional situation, and it is possible to control the coefficient of expansion according to the material of the magnetic core, and at the same time, it is possible to ensure the softening temperature and reliability. The purpose is to provide bonding glass.
本発明者は、熱膨張係数の制御にＮａ、Ｑが有効である
ことに着目して本発明を完成するに至ったものであって
、ＰｂＯａ重量％、５ｉｆｔｂ重量％、Ｂｔ○、Ｃ重量
％、 Ｂ ｉ ｔｏ ｓ ｄ ＭＷ％。The present inventor has completed the present invention by paying attention to the fact that Na and Q are effective in controlling the coefficient of thermal expansion. , B i to s d MW%.
Ｎａ、○ ｅｒｔｉ％よりなり、その組成範囲が４９≦
ａ≦６９
１４≦ｂ≦２８
６≦ｃ≦１０
５≦ｄ≦８
０ｄｅ≦１２
であることを特徴とするものである。It consists of Na, ○ erti%, and its composition range is 49≦
It is characterized in that a≦69, 14≦b≦28, 6≦c≦10, 5≦d≦8, and 0de≦12.
上記組成を有するボンディングガラス中、酸化鉛（Ｐｂ
Ｏ）はガラスを低融点化する成分であって、得られるボ
ンディングガラスの作業温度を制御するためにその組成
割合が増減される。ただし、ＰｂＯが４９重量％未満で
は作業温度が６００℃を越え、逆にＰｂＯが６９重量％
を越えると作業温度が５５０℃未満になり得られるガラ
スの耐水性も悪くなることから、ＰｂＯの含有量は４９
〜６９重世％の範囲とすることが好ましい。例えば、本
発明のボンディングガラスをセンダストコア部を有する
磁気コアの接合に使用する場合には、前記センダストコ
アの熱処理をガラス融着と同時に行うため、ガラス融着
作業１益度を５５０〜６００℃としなければならない。In the bonding glass having the above composition, lead oxide (Pb
O) is a component that lowers the melting point of glass, and its composition ratio is increased or decreased in order to control the working temperature of the resulting bonding glass. However, if PbO is less than 49% by weight, the working temperature will exceed 600°C;
If the PbO content exceeds 49°C, the working temperature will be less than 550°C and the water resistance of the resulting glass will deteriorate.
The range is preferably from 69% to 69%. For example, when the bonding glass of the present invention is used to bond a magnetic core having a sendust core portion, the heat treatment of the sendust core is performed at the same time as glass fusing, so that the glass fusing operation temperature is 550 to 600°C. Must be.
また、ＳｉＯ□は、ガラス化範囲を広げる成分であって
、ガラスを高融点化するとともに、ガラスの信頼性（耐
水性、耐腐食性等）を向上するものである。このＳｉｎ
、についても、作業温度等の観点から、その含有量は１
４〜２８重量％の範囲とすることが好ましい。Ｓｉｎ、
の含有量が１４重量％未満では、作業温度が５５０℃未
満となり、得られるガラスの耐水性、耐腐食性、耐摩耗
性が劣化する。また、結晶化して線引が難しくなり、ヌ
レ性が劣化する。５ｉＯｚの含有量が２８重量％を越え
ると、作業温度が６００℃を越え、やはりヌレ性が劣化
する。Further, SiO□ is a component that widens the range of vitrification, increases the melting point of the glass, and improves the reliability (water resistance, corrosion resistance, etc.) of the glass. This Sin
, the content is 1 from the viewpoint of working temperature etc.
It is preferably in the range of 4 to 28% by weight. Sin,
If the content is less than 14% by weight, the working temperature will be less than 550°C, and the water resistance, corrosion resistance, and abrasion resistance of the resulting glass will deteriorate. Moreover, it crystallizes, making it difficult to draw, and the wettability deteriorates. When the content of 5iOz exceeds 28% by weight, the working temperature exceeds 600°C, and the wettability also deteriorates.
ＢｚＣｈもガラス化範囲を広げる成分であって、粘性を
低下させヌレ性を向上する０例えばＰｂＯでガラスの粘
性を低下させると熱膨張係数を上昇させることになるが
、Ｂｏｏ、は熱膨張係数を高めないで粘度を下げる特異
な物質である。ただし、このＢ ２０３の含有量が６重
量％未満であると、得られるガラスが結晶化して線引が
難しくなりヌレ性が劣化すること、１０重量％を越える
とヌレ性が良くなりすぎてフェライトへの侵食が増大す
ること等から、６〜１０重量％の範囲内に設定すること
が好ましい。BzCh is also a component that expands the vitrification range, reducing the viscosity and improving wettability.For example, lowering the viscosity of glass with PbO will increase the thermal expansion coefficient, but Boo increases the thermal expansion coefficient. It is a unique substance that lowers viscosity without increasing it. However, if the B203 content is less than 6% by weight, the resulting glass will crystallize, making it difficult to draw and the wetting property will deteriorate; if it exceeds 10% by weight, the wetting property will be too good and it will become ferrite. It is preferable to set the content within the range of 6 to 10% by weight, since the corrosion of the metal may increase.
Ｂｉ、Ｏｓは、ＰｂＯに類似した成分であるが、ＰｂＯ
よりもガラスの粘性を下げる性質を有する。Bi and Os are components similar to PbO, but PbO
It has the property of lowering the viscosity of glass.
この３ｉ１０３の組成範囲としては、５〜８重量％であ
る。Ｂｉ２Ｏ，の含有量が５重量％未満であると、作業
温度が６００℃を越えガラスのヌレ性を劣化する。逆に
１３ｉ１０３の含有量が８重量％を越えると、得られる
ガラスのヌレ性が良くなりすぎてフェラ１°ト等を侵食
する震れがある。The composition range of this 3i103 is 5 to 8% by weight. If the content of Bi2O is less than 5% by weight, the working temperature will exceed 600° C. and the wettability of the glass will deteriorate. On the other hand, if the content of 13i103 exceeds 8% by weight, the wetting properties of the obtained glass become too good, causing vibrations that corrode the blowhole and the like.
Ｎ ａ ｚ Ｏは、得られるガラスの熱膨張係数を大幅
に上昇する成分であるが、大量の添加はガラスの信転性
を下げ、融点を下げることになる。かかる観点から、上
記Ｎａよ０の添加量は５重量％程変が限度である。そこ
で本発明では、Ｓｉｎｇの含有量を増やし、上記Ｎａ、
Ｑの添加量を増やした場合にも、融点を高めて所定の融
点をも′α保するとともにガラス化範囲を広げ、信頬性
を同上する。N a z O is a component that significantly increases the coefficient of thermal expansion of the resulting glass, but adding a large amount lowers the reliability of the glass and lowers the melting point. From this point of view, the amount of Na added is limited to about 5% by weight. Therefore, in the present invention, the content of Sing is increased, and the above Na,
Even when the amount of Q added is increased, the melting point is raised to maintain the predetermined melting point 'α, and the range of vitrification is expanded, which improves the reliability.
ただし、Ｎ ａ ！ Ｏの添加量が１２重世％を越える
とガラスの耐水性、耐食性が劣化すること、またガラス
が結晶化し線引が難しくなりヌレ性が劣化すること等か
ら、１２重量％以下に抑えることが好ましい、また、上
記Ｎａ、Ｏの添加量を増減することによりガラスの熱膨
張係数を制御することができるが、Ｎａ、○の添加量が
０重量％（無添加）ではフェライトや＋１磁性金属材料
とのなじみが悪くなる。したがって、上記Ｎ ａ １０
の添加量ｅは、０重量％＜ｅｓ１２！ｌ量％とする。な
お、この場合上記Ｎａ、Ｏの一部をに、Ｏで置換しても
よい。ただし、Ｋ、Ｏを使用する際には、ｔｊＪｒＪ９
を若干増やす必要があり、ＮａｚＯを１２重”Ｊ ！Ｉ
６添加したのと同等の効果を得るために１よ、Ｋ２Ｏの
添加量は１５重量％程１必要である。However, Na! If the amount of O added exceeds 12% by weight, the water resistance and corrosion resistance of the glass will deteriorate, and the glass will crystallize, making it difficult to draw and reducing the wettability, so it is recommended to keep it below 12% by weight. Preferably, the coefficient of thermal expansion of the glass can be controlled by increasing or decreasing the amount of Na and O added, but if the amount of Na and ○ added is 0% by weight (no addition), ferrite or +1 magnetic metal material It becomes difficult to get along with the person. Therefore, the above N a 10
The addition amount e is 0% by weight<es12! The amount is 1%. In this case, some of the above Na and O may be replaced with O. However, when using K and O, tjJrJ9
It is necessary to slightly increase NazO by 12 times.
In order to obtain the same effect as when adding 6, the amount of K2O added must be about 15% by weight.
上述の組成を有するボンディングガラスは、ガラス転移
点（熱膨張係数が変化する温度）３９０〜４２０℃、屈
服点（それ以上温度を上げると冷却してもガラス形状が
復帰しない温度）４２０〜４５０℃、融着温度（作業温
度）５５０〜６５０℃であり、Ｎａ、Ｏの添加量を増減
することにより、熱膨張係数（１００〜３５０℃におい
て）は９０Ｘ１０−’〜ｌ ３０ Ｘ １０−’ （℃
−’）に設定される。Bonding glass having the above composition has a glass transition point (temperature at which the coefficient of thermal expansion changes) of 390 to 420°C, and a yield point (temperature beyond which the glass shape does not return even if cooled) of 420 to 450°C. , the fusion temperature (working temperature) is 550 to 650℃, and by increasing or decreasing the amount of Na and O added, the thermal expansion coefficient (at 100 to 350℃) is 90X10-' to l30X10-' (℃
-').
ただし、融着塩度については磁気ヘッドの融着形状・方
式によって異なり、例えば捧ガラスをガラス溝から流し
ヘッドギャップを形成するときには５８０〜６００℃に
、平面上にガラスをまんべんなく塗布するときには６０
０〜６３０℃に、炉中に酸素を少量（１００ｐｐｍ程度
）入れて融着するときには５５０〜５８０℃に設定され
る。However, the salinity of the fusion varies depending on the fusion shape and method of the magnetic head; for example, when pouring glass from the glass groove to form a head gap, the temperature is 580 to 600°C, and when coating the glass evenly on a flat surface, the temperature is 60°C.
The temperature is set at 0 to 630°C, and when a small amount (about 100 ppm) of oxygen is introduced into the furnace for fusing, the temperature is set at 550 to 580°C.
〔作用］
Ｐ ｂＯ，Ｓ ｉ Ｏｔ＋ＢｚＯ，、Ｂ ｔｇｏｓを主
成分とするボンディングガラスにＮａ、Ｏを添加するこ
とにより、ガラスの熱膨張係数が制御される。したがっ
て、磁気へノドの材質に応じてボンディングガラスの熱
膨張係数を最適な値に設定することが可能となる。[Function] By adding Na and O to the bonding glass whose main components are P bO, S i Ot+BzO, and B tgos, the coefficient of thermal expansion of the glass is controlled. Therefore, it is possible to set the coefficient of thermal expansion of the bonding glass to an optimal value depending on the material of the magnetic nozzle.
また、上記ＮａｚＯの添加は、ガラスの市水性や作業温
度を低下させる原因となる。そこで本発明では、その欠
点を網目構造形成元素であるＳｉＯ工で補う、すなわち
、Ｓｉｎｇの含有壁を増力口させることにより、信鎖性
ならびに作業温度を回復させる。Further, the addition of NazO causes a decrease in the water resistance and working temperature of the glass. Therefore, in the present invention, the reliability and working temperature are restored by compensating for this drawback with SiO which is a network structure forming element, that is, by making the Sing-containing wall a force-increasing port.
以下、本発明を具体的な実施例により説明するが、本発
明がこれら実施例に限定されるものでないことは言うま
でもない。Hereinafter, the present invention will be explained using specific examples, but it goes without saying that the present invention is not limited to these examples.
大量±
Ｐ ｂ Ｏ，Ｓ ｉ ｏ、、 Ｂｚ○）＋ Ｂ Ｉ Ｚ
Ｃ））及びＮａｚＯを第１表に示す割合で混合し、磁気
ヘッド用ボンディングガラスを作製した。Large amount ± P b O, S io,, Bz○) + B I Z
C)) and NazO were mixed in the proportions shown in Table 1 to produce a bonding glass for a magnetic head.
第１表
得られた各ボンディングガラス（試料１〜試料５）につ
いて、熱膨張係数（１００〜３５０’Ｃ）及びガラス転
移点を測定した。結果を第２表に示す。Table 1 The thermal expansion coefficient (100 to 350'C) and glass transition point were measured for each of the bonding glasses (Samples 1 to 5) obtained. The results are shown in Table 2.
（以下余白）
第２表
第２表より、Ｎａ、Ｑの添加量に応して得られるガラス
の熱膨張係数が変化することがわかる。(The following is a blank space) Table 2 It can be seen from Table 2 that the coefficient of thermal expansion of the resulting glass changes depending on the amounts of Na and Q added.
また、得られるガラスの作業温度は、はとんど同じであ
る。Moreover, the working temperatures of the resulting glasses are almost the same.
邦」１匹
次に、磁性材コアに前述のポンディングガラスを融着し
、融着前後の磁気特性を比較することにより、磁気ヘッ
ド用磁性材に対するボンディングガラスの最適熱膨張係
数を選定した。Next, the above-mentioned bonding glass was fused to the magnetic material core, and the optimum coefficient of thermal expansion of the bonding glass for the magnetic material for the magnetic head was selected by comparing the magnetic properties before and after fusion.
すなわち、本発明のポンディングガラスでは、融着温度
一定で、且つ熱膨張係数を９０Ｘ１０−’〜１３０ Ｘ
１０−’ Ｃ℃−’）まで変化させることができるの
で、これらのガラスを融着することにより、ガラスの熱
膨張係数の影響のみによる磁性材の磁気特性の変化を測
定することができる。したがって、これを利用して磁気
ヘッドに使用するポンディングガラスの最適熱膨張係数
を選定することができる。That is, the bonded glass of the present invention has a constant fusion temperature and a thermal expansion coefficient of 90X10-' to 130X
By fusing these glasses, it is possible to measure changes in the magnetic properties of the magnetic material due only to the influence of the thermal expansion coefficient of the glass. Therefore, by utilizing this, it is possible to select the optimum coefficient of thermal expansion of the bonding glass used in the magnetic head.
このようにして最適な熱膨張係数を有するポンディング
ガラスを選定し、磁気ヘッドを作製した。In this way, a bonding glass having an optimal coefficient of thermal expansion was selected, and a magnetic head was manufactured.
例えば、高熱膨張係数を有する単結晶フェライト材（熱
膨張係数１３５ｘｌＯ−’℃−１）よりなる磁気コアの
作動ギャップ部での融着に、上述の実施例において作製
した試料３ （熱膨張係数１１０×１０−１℃−１）な
らびに試料４（熱膨張係数１２０×１０１℃−１）を使
用したところ、ガラスクランクのない磁気ヘッドを完成
することができた。For example, sample 3 (coefficient of thermal expansion 110 By using Sample 4 (thermal expansion coefficient: 120 x 101°C-1), a magnetic head without a glass crank could be completed.
同様に、高熱膨張係数を有する多結晶フェライト材（熱
膨張係数１３０ＸＩＯ−’℃−１）よりなる磁気コアの
作動ギャップ部での融着に、上述の実施例において作製
した試料３ならびに試料４を使用したところ、ガラス溶
出およびガラスクラックのない消去ヘッドが得られた。Similarly, Samples 3 and 4 prepared in the above example were used for fusing at the working gap of a magnetic core made of polycrystalline ferrite material having a high coefficient of thermal expansion (coefficient of thermal expansion: 130XIO-'°C-1). When used, an erasing head free of glass elution and glass cracking was obtained.
また、例えばＭｎ−Ｚｎフェライト等の酸化物磁性材料
とセンダスト等の金属磁性材料とから構成される複合型
磁気ヘッドにおいて、不発明のボンディングガラスを使
用したところ、フェライトとセンダストの熱膨張係数の
著しい違いによるソリが解消され、センダストの膜９１
かれ等も防止された。Furthermore, when an uninvented bonding glass is used in a composite magnetic head composed of an oxide magnetic material such as Mn-Zn ferrite and a metal magnetic material such as sendust, the coefficient of thermal expansion of ferrite and sendust is remarkable. The warping caused by the difference has been eliminated, and Sendust's film 91
They too were prevented.
以上の説明からも明らかなように、本発明のボンディン
グガラスにおいては、Ｎａ、Ｑを添加するとともにＳｉ
Ｏ□の含有量を増やしているので、１００〜３５０℃に
おける５′Ａ膨張係数を９０×１０−？〜ｌ ３０ ｘ
１０−’ （℃−’３程度まで連続的に設定でき、同
時に融着温度（作業温度）を一定の温度に保つことがで
き、例えば高熱膨張係数を有する磁性材を融着する際、
接着応力が最も小さくなるようなボンディングガラスを
選択することが可能となる。したがって、ガラスクラッ
クや膜？すがれ等のない′Ｉ＃密な磁気ヘッドの作製が
可能となる。As is clear from the above explanation, in the bonding glass of the present invention, Na and Q are added and Si
Since the content of O□ is increased, the 5'A expansion coefficient at 100 to 350°C is 90 x 10-? ~l 30 x
It can be set continuously up to about 10-'(℃-'3), and at the same time the fusing temperature (working temperature) can be kept constant. For example, when fusing magnetic materials with a high coefficient of thermal expansion,
It becomes possible to select bonding glass that minimizes adhesive stress. Therefore, glass cracks and membranes? It becomes possible to manufacture a magnetic head with high density 'I# without any gaps or the like.
また、本発明のボンディングガラスは、磁気ヘッド加工
を達成するために充分な耐水性や硬度を有することから
、この点でも信頼性の高い磁気ヘッドの提供が可能とな
る。Further, since the bonding glass of the present invention has sufficient water resistance and hardness to achieve magnetic head processing, it is possible to provide a highly reliable magnetic head in this respect as well.
Claims (1)
重量％、Ｂｉ＿２Ｏ＿３ｄ重量％、Ｎａ＿２Ｏｅ重量％
よりなり、その組成範囲が ４９≦ａ≦６９ １４≦ｂ≦２８ ６≦ｃ≦１０ ５≦ｄ≦８ ０＜ｅ≦１２ であることを特徴とする磁気ヘッド用ボンディングガラ
ス。[Claims] PbOa weight %, SiO_2b weight %, B_2O_3c
Weight%, Bi_2O_3d weight%, Na_2Oe weight%
Bonding glass for a magnetic head, characterized in that the composition range is 49≦a≦69 14≦b≦28 6≦c≦10 5≦d≦8 0<e≦12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18698086A JPH0764584B2 (en) | 1986-08-11 | 1986-08-11 | Bonding glass for magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18698086A JPH0764584B2 (en) | 1986-08-11 | 1986-08-11 | Bonding glass for magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6345147A true JPS6345147A (en) | 1988-02-26 |
| JPH0764584B2 JPH0764584B2 (en) | 1995-07-12 |
Family
ID=16198094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18698086A Expired - Fee Related JPH0764584B2 (en) | 1986-08-11 | 1986-08-11 | Bonding glass for magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0764584B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0602567A2 (en) * | 1992-12-14 | 1994-06-22 | Sony Corporation | Magnetic transducer head |
-
1986
- 1986-08-11 JP JP18698086A patent/JPH0764584B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0602567A2 (en) * | 1992-12-14 | 1994-06-22 | Sony Corporation | Magnetic transducer head |
| EP0602567A3 (en) * | 1992-12-14 | 1994-10-12 | Sony Corp | Magnetic transducer head. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0764584B2 (en) | 1995-07-12 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |