JP2589306B2 - Perpendicular magnetic recording head - Google Patents
Perpendicular magnetic recording headInfo
- Publication number
- JP2589306B2 JP2589306B2 JP62091429A JP9142987A JP2589306B2 JP 2589306 B2 JP2589306 B2 JP 2589306B2 JP 62091429 A JP62091429 A JP 62091429A JP 9142987 A JP9142987 A JP 9142987A JP 2589306 B2 JP2589306 B2 JP 2589306B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- perpendicular magnetic
- sio
- film layer
- thin film
- 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
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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/255—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for protection against wear
-
- 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
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Description
【発明の詳細な説明】 技術分野 本発明は、垂直磁気記録に用いられる垂直磁気記録ヘ
ツドに関する。Description: TECHNICAL FIELD The present invention relates to a perpendicular magnetic recording head used for perpendicular magnetic recording.
従来技術 近年、磁気記録方式において高密度記録化を図るため
に垂直磁気記録方式の開発ないしは特性の改善が盛んに
なされている。その一つとして、昭和60年12月12日〜13
日の応用磁気セミナー「垂直磁気記録方式」において
「垂直磁気記録媒体の耐久性とその他の特性」として開
示されているものがある。これは、例えば主磁極励磁型
垂直磁気記録ヘツドにおいて、主磁極をアルチツク（Al
2O3・TiO）による保持材で挾持保持させて垂直磁気記録
媒体面上を摺動させるようにしたものであり、このよう
なアルチツクは耐摩耗性に優れていることが報告されて
いる。2. Description of the Related Art In recent years, in order to achieve high-density recording in a magnetic recording system, a perpendicular magnetic recording system has been actively developed or its characteristics have been improved. One of them is from December 12, 1985 to 13
There is one disclosed as "Durability and other characteristics of perpendicular magnetic recording media" in the Japan Applied Magnetic Seminar "Perpendicular Magnetic Recording System". This is because, for example, in a main pole excitation type perpendicular magnetic recording head, an
(2 O 3 .TiO.) And a sliding material is slid on the surface of the perpendicular magnetic recording medium. It has been reported that such an alloy has excellent wear resistance.
ところが、このようなアルチツクは金属的な導電性を
有するため、高周波にて使用する場合にはうず電流損失
が生じ、十分な特性が得られなくなつてしまう。又、ア
ルチツク上に主磁極を直接スパツタリングして成膜形成
した場合、主磁極の磁気特性が著しく劣化してしまう実
験結果が得られたものである。よつて、このようなアル
チツク保持による主磁極を備えたヘツド構造で垂直磁気
記録を行なつた場合には、十分なる磁気記録特性（ヘツ
ド出力特性ないしは電磁変換特性）を得るのが困難であ
る。However, since such an alloy has metallic conductivity, eddy current loss occurs when used at a high frequency, and sufficient characteristics cannot be obtained. In addition, when a film was formed by directly sputtering a main magnetic pole on an AlTiC film, an experimental result was obtained in which the magnetic characteristics of the main magnetic pole were significantly deteriorated. Therefore, when perpendicular magnetic recording is performed with a head structure having such a main pole by holding an arc, it is difficult to obtain sufficient magnetic recording characteristics (head output characteristics or electromagnetic conversion characteristics).
目的 本発明は、このような点に鑑みなされたもので、アル
チツクによる耐摩耗特性を生かしつつ、高周波特性及び
ヘツド出力特性に優れた垂直磁気記録ヘツドに得ること
を目的とする。SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a perpendicular magnetic recording head having excellent high-frequency characteristics and head output characteristics while making use of the abrasion resistance characteristics of the art.
構成 本発明は、上記目的を達成するため、単磁極型の垂直
磁気記憶ヘツドにおいて、Al2O3・TiC上にSiO2薄膜層を
形成した保持材の前記SiO2薄膜層を介在させて主磁極の
両面を前記保持材により挾持保持し、耐摩耗性はAl2O3
・TiC部分により確保し、ヘツド諸特性は絶縁物であるS
iO2薄膜層の存在により確保できるようにしたことを特
徴とするものである。Configuration In order to achieve the above object, the present invention mainly provides a single pole type perpendicular magnetic storage head by interposing the SiO 2 thin film layer of a holding material having a SiO 2 thin film layer formed on Al 2 O 3 .TiC. The both sides of the magnetic pole are sandwiched and held by the holding material, and the wear resistance is Al 2 O 3
-Secured by TiC part, head properties are insulating S
The feature is that it can be secured by the presence of the iO 2 thin film layer.
以下、本発明の一実施例を図面に基づいて説明する。
本実施例は、単磁極型垂直磁気記録ヘツド中の主磁極励
磁型のものに適用したものである。まず、山の字形状に
形成されたフエライトコア１の中央脚1a周りにはコイル
２が巻回されている。そして、フエライトコア１の各脚
1a,1b,1c上には保持材３を介して主磁極４が設けられて
いる。ここに、主磁極４はフエライトコア１の中央脚1a
上に位置するように配置され、前記コイル２による励磁
を受け得る主磁極励磁型構造とされている。そして、こ
のような主磁極４を保持した保持材３の表面（上面）側
が垂直磁気記録媒体に対する摺動面となるものである。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
This embodiment is applied to a main pole excitation type in a single pole type perpendicular magnetic recording head. First, a coil 2 is wound around a central leg 1a of a ferrite core 1 formed in a mountain shape. And each leg of ferrite core 1
A main pole 4 is provided on 1a, 1b, 1c via a holding member 3. Here, the main pole 4 is the central leg 1a of the ferrite core 1.
The main pole excitation type structure is disposed so as to be positioned above and can be excited by the coil 2. The surface (upper surface) of the holding member 3 holding the main magnetic pole 4 serves as a sliding surface for the perpendicular magnetic recording medium.
ここで、前記主磁極４を挾持状態で両側から保持する
保持材３は、従来例で述べたように耐摩耗性に優れたア
ルチツク（Al2O3・TiC）５を主体とするものであるが、
主磁極４側にSiO2薄膜層６を介在させ、このSiO2薄膜層
６とアルチツク５とにより保持材３を構成したものであ
る。SiO2薄膜層６は絶縁性を有するものであり、その膜
厚は0.1μｍ以上10μｍ以下程度とされている。Here, the holding material 3 for holding the main magnetic pole 4 from both sides in a sandwiched state is mainly composed of an aluminum (Al 2 O 3 .TiC) 5 having excellent wear resistance as described in the conventional example. But,
The SiO 2 thin film layer 6 is interposed on the main magnetic pole 4 side, and the holding material 3 is constituted by the SiO 2 thin film layer 6 and the alloy 5. The SiO 2 thin film layer 6 has an insulating property, and its film thickness is about 0.1 μm or more and 10 μm or less.
又、このような保持材３の製造方法を第２図により説
明する。まず、第２図（ａ）に示すようにアルチツク基
板5A上にSiO2薄膜層6Aを所定膜厚にて成膜形成する。次
に、同図（ｂ）に示すようにSiO2薄膜層6A上に主磁極部
4Aを所定厚さ、所定長さでスパツタリング形成する。そ
して、第２図（ａ）の如くSiO2薄膜層6Aを形成した他の
アルチツク基板5Aも設けて、同図（ｃ）に示すように主
磁極部4Aを挾むようにして２枚のアルチツク基板5Aを接
合させる。次に、このような接合状態で所望の主磁極長
に合せて、これらの双方のアルチツク基板5Aに渡つて同
図（ｄ）に示すようにスライスし、その両面を研磨する
ことにより、主磁極４を保持した状態の保持材３が形成
される。Further, a method of manufacturing such a holding member 3 will be described with reference to FIG. First, as shown in FIG. 2 (a), a SiO 2 thin film layer 6A is formed in a predetermined thickness on an aluminum substrate 5A. Next, as shown in FIG. 4B, the main magnetic pole portion is formed on the SiO 2 thin film layer 6A.
4A is sputtered with a predetermined thickness and a predetermined length. As shown in FIG. 2 (a), another aluminum substrate 5A on which an SiO 2 thin film layer 6A is formed is also provided, and as shown in FIG. Join. Next, according to the desired main pole length in such a joined state, the two main substrates 5A are sliced as shown in FIG. 4D, and both sides thereof are polished to polish the main pole. The holding member 3 holding the holding member 4 is formed.
このような構成によれば、まず、主磁極４の両側に絶
縁物であるSiO2薄膜層６を介して導電性のアルチツク５
が存在するので、高周波で使用する場合であつてもうず
電流が発生することがなく、高周波特性は良好となる。
つまり、ヘツド出力の高域の損失は少ないものとなる。
又、主磁極４をアルチツク５上に直接スパツタリングに
より形成した場合に比べ、SiO2薄膜層６上にスパツタリ
ング形成しているので、磁気特性は良好となつたもので
ある。この点、絶縁物として種々の材料をアルチツク上
に形成し、その絶縁物上に主磁極を形成した場合におい
て、絶縁材料が本実施例のようにSiO2の場合が最も良好
なる磁気特性が得られたものである。According to such a configuration, first, on both sides of the main pole 4, the conductive alloy 5 is interposed via the SiO 2 thin film layer 6 which is an insulator.
Is present, no current is generated any more when used at high frequencies, and the high-frequency characteristics are improved.
That is, the loss of the head output in the high frequency range is small.
Also, since the main magnetic pole 4 is formed on the SiO 2 thin film layer 6 by sputtering, as compared with the case where the main magnetic pole 4 is formed directly on the alloy 5 by sputtering, the magnetic properties are improved. In this regard, in the case where various materials are formed as an insulator on an aluminum alloy and the main magnetic pole is formed on the insulator, the best magnetic characteristics are obtained when the insulating material is SiO 2 as in this embodiment. It was done.
又、本実施例構成の磁気ヘツドの耐久性について検討
すると、垂直磁気記録媒体面を摺動する部分は大半が耐
摩設性に優れたアルチツク５表面であるので、十分な耐
久性が確保される。ちなみに、垂直磁気記録媒体と本実
施例構造の磁気ヘツドとを接触摺動させることにより、
一旦書込まれた信号の出力の減少状態（相対出力）と経
過時間（任意単位による相対的なもの）との関係による
耐久性のデータを第３図に示す。Further, when the durability of the magnetic head of this embodiment is examined, since most of the portion sliding on the surface of the perpendicular magnetic recording medium is the surface of the alloy 5 having excellent abrasion resistance, sufficient durability is ensured. . By the way, by sliding the perpendicular magnetic recording medium and the magnetic head of the structure of the present embodiment in contact,
FIG. 3 shows durability data based on the relationship between the reduced state of the output of the signal once written (relative output) and the elapsed time (relative in an arbitrary unit).
なお、本実施例では、主磁極励磁型構造のヘツドへの
適用例で説明したが、これに限らず、単磁極型の垂直磁
気記録ヘツドであれば同様に適用できる。In the present embodiment, an example of application to the head of the main magnetic pole excitation type structure has been described. However, the present invention is not limited to this, and a single magnetic pole type perpendicular magnetic recording head can be similarly applied.
効果 本発明は上述のように、単磁極型の垂直磁気記録ヘツ
ドにおいて、Al2O3・TiC上にSiO2薄膜層を形成した保持
材の前記SiO2薄膜層を介在させて主磁極の両面を前記保
持材により挾持保持し、耐摩耗性はAl2O3・TiC部分によ
り確保し、ヘツド諸特性は絶縁物であるSiO2薄膜層の存
在により確保できるようにしたので、高周波で使用する
場合であつてもうず電流損失を生ずることがなく、良好
なる高周波特性を発揮させることができ、又、Al2O3・T
iC上に主磁極を直接形成した場合に比して主磁極の磁気
特性の劣化も少なく、良好なる磁気特性が確保され、更
には垂直磁気記録媒体に対する摺動はその大半を耐摩耗
性に優れたAl2O3・TiCが受け持つので、耐久性をも十分
に確保することができるものである。Effect The present invention as described above, in the perpendicular magnetic recording head of a single-pole type, Al 2 O 3 · the both sides of the main magnetic pole of the SiO 2 thin-film layer is interposed holding material formed of SiO 2 thin film layer on TiC Is held by the above-mentioned holding material, the wear resistance is secured by the Al 2 O 3 .TiC portion, and the various head properties can be secured by the presence of the SiO 2 thin film layer which is an insulator. without causing eddy current losses shall apply if, it is possible to exhibit good Naru high frequency characteristics, and, Al 2 O 3 · T
Compared to the case where the main pole is formed directly on iC, the magnetic properties of the main pole are less deteriorated and good magnetic properties are secured, and most of the sliding on perpendicular magnetic recording media has excellent wear resistance. Since Al 2 O 3 · TiC is used, sufficient durability can be ensured.
図面は本発明の一実施例を示すもので、第１図は概略正
面図、第２図は保持材の製造工程を示す概略正面図、第
３図は耐久特性を示す特性図である。 ３……保持材、４……主磁極、５……Al2O3・TiC、６…
…SiO2薄膜層The drawings show an embodiment of the present invention, FIG. 1 is a schematic front view, FIG. 2 is a schematic front view showing a manufacturing process of a holding material, and FIG. 3 is a characteristic diagram showing durability characteristics. 3 ... holding material, 4 ... main magnetic pole, 5 ... Al 2 O 3 · TiC, 6 ...
… SiO 2 thin film layer
Claims (1)
Al2O3・TiC上にSiO2薄膜層を形成した保持材の前記SiO2
薄膜層を介在させて主磁極の両面を前記保持材により挾
持保持したことを特徴とする垂直磁気記録ヘツド。In a single pole type perpendicular magnetic recording head,
The above-mentioned SiO 2 of the holding material having a SiO 2 thin film layer formed on Al 2 O 3 .TiC
A perpendicular magnetic recording head characterized in that both surfaces of a main pole are sandwiched and held by said holding material with a thin film layer interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62091429A JP2589306B2 (en) | 1987-04-14 | 1987-04-14 | Perpendicular magnetic recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62091429A JP2589306B2 (en) | 1987-04-14 | 1987-04-14 | Perpendicular magnetic recording head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63255802A JPS63255802A (en) | 1988-10-24 |
| JP2589306B2 true JP2589306B2 (en) | 1997-03-12 |
Family
ID=14026129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62091429A Expired - Lifetime JP2589306B2 (en) | 1987-04-14 | 1987-04-14 | Perpendicular magnetic recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2589306B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60202510A (en) * | 1984-03-27 | 1985-10-14 | Fujitsu Ltd | Magnetic head |
| JPS6226608A (en) * | 1985-07-26 | 1987-02-04 | Sony Corp | Single magnetic pole type magnetic head |
-
1987
- 1987-04-14 JP JP62091429A patent/JP2589306B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63255802A (en) | 1988-10-24 |
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