JPS6242330B2 - - Google Patents
Info
- Publication number
- JPS6242330B2 JPS6242330B2 JP54018354A JP1835479A JPS6242330B2 JP S6242330 B2 JPS6242330 B2 JP S6242330B2 JP 54018354 A JP54018354 A JP 54018354A JP 1835479 A JP1835479 A JP 1835479A JP S6242330 B2 JPS6242330 B2 JP S6242330B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- coating layer
- wear
- head
- resistant coating
- 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
- 239000011247 coating layer Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 10
- 238000005299 abrasion Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007751 thermal spraying Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Description
【発明の詳細な説明】
本発明は磁気ヘツドに係り、特にテープ摺動に
対する耐摩耗コーテイングを有する磁気ヘツドに
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to magnetic heads, and more particularly to magnetic heads having a wear-resistant coating against tape sliding.
第１図は再生又は録音ヘツドの横断面図で、第
１図において１は磁気コア、２は磁気コア１に巻
回してあるコイルで、３はヘツドケースで主にパ
ーマロイ金属が使用されこれに１，２が収納され
る。４は耐摩耗コーテイング層でヘツドケース３
のテープ摩耗を防ぐ為に設けたものである。コー
テイング材料としては硬質金属類又は酸化チタン
や酸化チタン−アルミナ複合物等のセラミツク類
が用いられる、コアがフエライト等の場合耐摩耗
性の点からみれば後者の方がよい。 Figure 1 is a cross-sectional view of a playback or recording head. In Figure 1, 1 is a magnetic core, 2 is a coil wound around the magnetic core 1, and 3 is a head case mainly made of permalloy metal. , 2 are stored. 4 is a wear-resistant coating layer and head case 3
This was provided to prevent tape wear. As the coating material, hard metals or ceramics such as titanium oxide or titanium oxide-alumina composites are used. If the core is made of ferrite or the like, the latter is better from the viewpoint of wear resistance.
その形成方法として(a)プラズマ溶射法、(b)蒸着
法、(c)スパツタリング法、(d)化学的蒸着法
（chemical vaper deposition）又は物理的蒸着法
（phYsical vaper deposition）がある。前記(b)、
(c)は皮膜形成速度が遅く、その生産がバツチ式と
なり前記(d)は400〜500℃の高温雰囲気が必要であ
る。前記(a)は形成速度も速く最も量産性ある方法
として注目を浴びている。プラズマ溶射法でコー
テイング層を設ける場合特にフエライトコアの場
合皮膜とコアの接着強度が弱く剥離又は隙間がで
きると言う欠点があつた。この場合テープの消耗
が激しく摩耗粉が隙間にたまり周波数特性を悪く
する。 Formation methods include (a) plasma spraying, (b) vapor deposition, (c) sputtering, and (d) chemical vapor deposition or physical vapor deposition. (b) above;
(c) has a slow film formation rate and is produced in batches, and (d) requires a high temperature atmosphere of 400 to 500°C. The above method (a) is attracting attention as a method that has a fast formation rate and is the most mass-producible method. When a coating layer is provided by plasma spraying, especially when using a ferrite core, the adhesive strength between the coating and the core is weak, resulting in peeling or gaps. In this case, the tape is severely worn out and abrasion powder accumulates in the gap, worsening the frequency characteristics.
本発明の目的は上記したコーテイング層の剥離
又は、コアとの隙間のない磁気ヘツドを提供する
ことにある。 An object of the present invention is to provide a magnetic head that does not have the above-mentioned peeling of the coating layer or a gap with the core.
本発明の要点はコア上に溶射膜（コーテイング
層）との糊の役目をするガラス質の層を設けたこ
とにある。 The key point of the present invention is that a vitreous layer is provided on the core to serve as a glue for the thermally sprayed film (coating layer).
以下本発明を第２図に示した実施例を用いて説
明する。第２図における５ａ，５ｂはヘツドケー
ス３に図示の如く挿着されたヘツドコア１とヘツ
ドコア３のテープ対向面に形成された耐摩耗コー
テイング層４との密着力を増す糊の役目を果すガ
ラス層である。ガラス層５ａ，５ｂの形成はコア
形状ができ上つた後にスパツタリング、化学的蒸
着法又は溶射法により形成する。ガラス質のもの
ものセラミツク溶射の糊の役目を果すのはプラズ
マ溶射における高温と溶融粒子のスピードがガラ
スの極く表面を融かし溶射粒子がくい込むためで
ある。このガラス層はあくまで糊の役目を果すの
で厚さはいらない。従つて0.01μｍもあればよ
い。又ガラス自体もテープ摩耗に対して耐摩耗性
を有する為ガラス層は厚くてもかまわず、溶射で
ガラス層を形成する場合、数十μｍを形成しても
充分その役目を果す。この様にガラス層を形成し
たヘツド素子をヘツドケースに収納し、次にセラ
ミツク耐摩耗コーテイング層４を溶射で形成し、
しかるのち円筒研摩して本ヘツドは完成される。 The present invention will be explained below using the embodiment shown in FIG. 5a and 5b in FIG. 2 are glass layers that serve as glue to increase the adhesion between the head core 1 inserted into the head case 3 as shown in the figure and the abrasion-resistant coating layer 4 formed on the tape facing surface of the head core 3. be. The glass layers 5a and 5b are formed by sputtering, chemical vapor deposition, or thermal spraying after the core shape is completed. The reason why vitreous materials act as glue in ceramic thermal spraying is that the high temperature and speed of the molten particles during plasma spraying melts the very surface of the glass and the sprayed particles penetrate into it. This glass layer only serves as glue, so it doesn't need to be thick. Therefore, 0.01 μm is sufficient. Further, since the glass itself has abrasion resistance against tape abrasion, the glass layer may be thick. When forming a glass layer by thermal spraying, a thickness of several tens of micrometers can sufficiently fulfill its role. The head element with the glass layer formed in this way is housed in a head case, and then a ceramic wear-resistant coating layer 4 is formed by thermal spraying.
Afterwards, the main head is completed by cylindrical polishing.
ヘツドケース３のプラズマ溶射膜に対する表面
はエアブラスト等により表面を粗とすることによ
り、プラズマ溶射皮膜の喰い付きを良好とし、そ
の接着強度は20〜30Kg／cm2となり実用上充分な値
となつている。 The surface of the head case 3 to which the plasma sprayed coating is applied is made rough by air blasting, etc., to improve the adhesion of the plasma sprayed coating, and the adhesive strength is 20 to 30 kg/cm 2 , which is a sufficient value for practical use. There is.
フエライトコア１上のプラズマ溶射膜の接着強
度は５Kg／cm2以下であつたものが、上記したガラ
ス層５ａ，５ｂの下地処理を施すことにより10〜
20Kg／cm2の強度となり、磁気ヘツドとに実用上問
題がなくなつた。 The adhesive strength of the plasma sprayed film on the ferrite core 1 was 5 kg/cm 2 or less, but by applying the above-mentioned surface treatment of the glass layers 5a and 5b,
The strength was 20Kg/cm 2 , and there were no practical problems with the magnetic head.
以上述べた本発明の磁気ヘツドによればコアと
耐摩耗コーテング層との接着力が増加し、耐摩耗
コーテイング層を厚くしても、該コーテイング層
の研摩加工時剥離現象がなくなり、又隙間がなく
なりこの部分にテープの摩耗粉がつくことが極力
少なくなり、周波数特性の劣化をほとんどなくす
ことができる。 According to the above-described magnetic head of the present invention, the adhesive force between the core and the wear-resistant coating layer is increased, and even if the wear-resistant coating layer is made thicker, there is no peeling phenomenon during polishing of the coating layer, and the gap is reduced. This minimizes the amount of tape abrasion particles attached to this area, and almost eliminates deterioration of frequency characteristics.
第１図は耐摩耗コーテング層を設けた従来の磁
気ヘツドの要部断面図、第２図は本発明の実施例
を示す磁気ヘツドの要部断面図である。
１……コア、２……コイル、３……ヘツドケー
ス、４……耐摩耗コーテング層、５ａ，５ｂ……
ガラス層。
FIG. 1 is a cross-sectional view of a main part of a conventional magnetic head provided with a wear-resistant coating layer, and FIG. 2 is a cross-sectional view of a main part of a magnetic head showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Core, 2... Coil, 3... Head case, 4... Wear-resistant coating layer, 5a, 5b...
glass layer.
Claims (1)
耗性コーテイング層を施した磁気ヘツドにおいて
ヘツドコアと耐摩耗性コーテイング層間に該両者
の剥離を防止するガラス層を設けたことを特徴と
する磁気ヘツド。1. A magnetic head in which a wear-resistant coating layer is applied to the tape sliding surface except for the area near the gap, characterized in that a glass layer is provided between the head core and the wear-resistant coating layer to prevent the two from peeling off. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1835479A JPS55113119A (en) | 1979-02-21 | 1979-02-21 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1835479A JPS55113119A (en) | 1979-02-21 | 1979-02-21 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55113119A JPS55113119A (en) | 1980-09-01 |
| JPS6242330B2 true JPS6242330B2 (en) | 1987-09-08 |
Family
ID=11969339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1835479A Granted JPS55113119A (en) | 1979-02-21 | 1979-02-21 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55113119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0216613U (en) * | 1988-07-20 | 1990-02-02 | ||
| JPH0580027U (en) * | 1991-07-18 | 1993-10-29 | ティーディーケイ株式会社 | Piezoelectric parts |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131604A (en) * | 1983-12-20 | 1985-07-13 | Victor Co Of Japan Ltd | Magnetic recording and reproducing element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5187417U (en) * | 1975-01-07 | 1976-07-13 |
-
1979
- 1979-02-21 JP JP1835479A patent/JPS55113119A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0216613U (en) * | 1988-07-20 | 1990-02-02 | ||
| JPH0580027U (en) * | 1991-07-18 | 1993-10-29 | ティーディーケイ株式会社 | Piezoelectric parts |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55113119A (en) | 1980-09-01 |
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