JPS6336042B2 - - Google Patents
Info
- Publication number
- JPS6336042B2 JPS6336042B2 JP53154952A JP15495278A JPS6336042B2 JP S6336042 B2 JPS6336042 B2 JP S6336042B2 JP 53154952 A JP53154952 A JP 53154952A JP 15495278 A JP15495278 A JP 15495278A JP S6336042 B2 JPS6336042 B2 JP S6336042B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- magnetic pole
- magnetic
- main
- pole
- 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
- 230000005291 magnetic effect Effects 0.000 claims description 47
- 230000035699 permeability Effects 0.000 claims description 17
- 230000005415 magnetization Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 description 9
- 230000005284 excitation Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
この発明は信号を磁気記録媒体の垂直方向、即
ち厚み方向に記録する、垂直磁化記録装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a perpendicular magnetization recording device that records signals in the perpendicular direction of a magnetic recording medium, that is, in the thickness direction.
従来の磁気記録方式は、リング形ヘツドを用
い、磁気記録媒体の面内方向の残留磁化を利用し
たものであつた。この方式では記録の高密度化と
ともに記録媒体内の減磁界が大きくなり、記録密
度に限界がある。このため磁気記録媒体の垂直方
向の残留磁化を利用する、垂直記録方式が提案さ
れた。この方式は、記録が高密度になるほど減磁
界が零に漸近するため、本質的に高密度記録に適
しており、実際に短波長記録特性が優れているこ
とが確認されている（応用磁気学会第１回研究会
資料）。垂直記録方向における磁気記録ヘツドと
して従来提案されている例を、第１図に示す。同
図ａは記録媒体１に接触する高透磁率薄膜からな
る主磁極２を巻線３によつて直接励磁する、主磁
極励磁形ヘツドである。同図ｂは主磁極２の側面
に高透磁率部材４を設置して記録効率改善をはか
つた主磁極励磁形ヘツドである。同図ｃは記録媒
体１の裏面に高透磁率材料５を密着して置き、影
像効果等によつて記録感度の向上をはかつたもの
であり、影像形ヘツドと呼ばれる。同図ｄは記録
媒体１を挾んで主磁極２と対向して置かれた補助
磁極６に巻線３を施し、補助磁極６による磁界で
主磁極２を励磁する、補助磁極励磁形ヘツドであ
る。これらのヘツドを検討した結果現状において
は、補助磁極励磁形ヘツドが主磁極励磁形ヘツ
ド、影像形ヘツドに比べ、記録感度が優れている
ことが報告されている（電子通信学会技術報告
MR77―25、公開特許公報昭52−134706）。しか
し補助磁極励磁形ヘツドは、記録媒体を２つの磁
極で挾む構造であるため、例えば回転ヘツドやデ
イスク状記録媒体への応用が困難であるなど、構
造的に不便な点が多い。このことは影像形ヘツド
についても同様である。以上のように現状におい
ては、記録感度的にも構造的にも欠点がないヘツ
ドは発明されていない。従つてこのような欠点の
ないヘツド即ち記録感度の良い、主磁極励磁形ヘ
ツドの発明が望まれていた。 Conventional magnetic recording systems use ring-shaped heads and utilize residual magnetization in the in-plane direction of the magnetic recording medium. In this method, as the recording density increases, the demagnetizing field within the recording medium increases, and there is a limit to the recording density. For this reason, a perpendicular recording method has been proposed that utilizes the residual magnetization in the perpendicular direction of a magnetic recording medium. This method is essentially suitable for high-density recording because the demagnetizing field approaches zero as the recording density increases, and it has been confirmed that it actually has excellent short-wavelength recording characteristics (Japan Society of Applied Magnetics) 1st study group materials). An example of a conventionally proposed magnetic recording head in the perpendicular recording direction is shown in FIG. Figure a shows a main pole excitation type head in which a main pole 2 made of a high magnetic permeability thin film in contact with a recording medium 1 is directly excited by a winding 3. Figure b shows a main pole excitation type head in which a high magnetic permeability member 4 is installed on the side surface of the main pole 2 to improve recording efficiency. Figure c shows a head in which a high magnetic permeability material 5 is placed in close contact with the back surface of the recording medium 1 to improve the recording sensitivity through an image effect or the like, and is called an image type head. Figure d shows an auxiliary magnetic pole excitation type head in which a winding 3 is applied to an auxiliary magnetic pole 6 placed opposite the main magnetic pole 2 with the recording medium 1 in between, and the main magnetic pole 2 is excited by the magnetic field of the auxiliary magnetic pole 6. . As a result of studying these heads, it has been reported that the auxiliary magnetic pole excitation type head currently has superior recording sensitivity compared to the main magnetic pole excitation type head and the image type head (Technical Report of Institute of Electronics and Communication Engineers).
MR77-25, published patent publication Sho 52-134706). However, since the auxiliary magnetic pole excitation type head has a structure in which the recording medium is sandwiched between two magnetic poles, it has many structural inconveniences, such as difficulty in applying it to rotating heads or disk-shaped recording media, for example. The same applies to the image head. As described above, at present, no head has been invented that is free from drawbacks in terms of recording sensitivity and structure. Therefore, it has been desired to invent a head free from such drawbacks, that is, a main pole excitation type head with good recording sensitivity.
この発明は記録感度の高い主磁極励磁形垂直記
録ヘツドを提供することを目的とするものであ
る。 An object of the present invention is to provide a main pole-excited perpendicular recording head with high recording sensitivity.
この発明は高透磁率薄膜からなる主磁極の側面
に比較的厚い高透磁率部材を、最も記録感度が高
くなるように設置したものである。 In this invention, a relatively thick high magnetic permeability member is installed on the side surface of a main pole made of a high magnetic permeability thin film so as to provide the highest recording sensitivity.
以下この発明を図面を参照して詳細に説明す
る。第２図はこの発明の一実施例を示すものであ
る。図から明らかのようにこの実施例に係る装置
は、磁気テープ１に先端部が対向するようにして
設けた高透磁率薄膜よりなる主磁極２の内側に、
高透磁率部材４をその先端面を主磁極２の先端面
からずらして設け、コイル３を巻回するようにし
たものであり、かつ主磁極２とその両側に設けた
高透磁率部材４の合計の厚みＴと主磁極２と高透
磁率部材４との先端面のずれの量Ｄの割合Ｄ／Ｔ
を1/2乃至１に設定したものである。このような
構成によると、ヘツドの記録感度を最も大きくす
ることができる。すなわち第３図は上記Ｔを一定
としてＤを変化させたときの主磁極先端から発生
する記録磁界H0の変化を示したもので、記録磁
界H0はＤ／Ｔが1/2乃至１のとき最大となること
を示している。このようにこの発明は主磁極とそ
の側面に設けた高透磁率部材の合計の厚みＴと、
主磁極と高透磁率部材の先端面のずれの量Ｄに着
目し、それらの関係がＤ／Ｔ＝1/2〜１のとき記
録感度が最大となることを実験的に見い出して成
されたものである。 The present invention will be explained in detail below with reference to the drawings. FIG. 2 shows an embodiment of the present invention. As is clear from the figure, the device according to this embodiment has a main magnetic pole 2 made of a high magnetic permeability thin film provided with its tip facing the magnetic tape 1.
A high magnetic permeability member 4 is provided with its tip surface offset from the tip surface of the main magnetic pole 2, and a coil 3 is wound around the main magnetic pole 2. Ratio D/T of the total thickness T and the amount of deviation D of the tip surfaces of the main magnetic pole 2 and the high permeability member 4
is set to 1/2 to 1. With this configuration, the recording sensitivity of the head can be maximized. In other words, Figure 3 shows the change in the recording magnetic field H 0 generated from the tip of the main magnetic pole when D is varied while keeping T constant. It is shown that it is maximum when In this way, the present invention has a total thickness T of the main magnetic pole and the high magnetic permeability member provided on the side surface thereof,
This was achieved by focusing on the amount of deviation D between the main magnetic pole and the tip of the high permeability member, and experimentally finding that the recording sensitivity is maximized when the relationship between them is D/T = 1/2 to 1. It is something.
第５図はこの発明のさらに他の実施例である。
なお側面高透磁率部材４にテーパをつけると、側
面高透磁率部材先端への磁荷集中効果のため更に
記録感度が向上する。 FIG. 5 shows yet another embodiment of the invention.
Note that when the side high magnetic permeability member 4 is tapered, the recording sensitivity is further improved due to the effect of concentrating the magnetic charge on the tip of the side high magnetic permeability member.
第１図は従来の垂直記録装置の構成を示す断面
図、第２図はこの発明の一実施例による主磁極励
磁形記録装置の構成を示す断面図第３図は、第２
図中のＤの変化による記録磁界H0の変化を示す
図である。
１……記録媒体、２……主磁極、３……巻線、
４……高透磁率側面部材、５……高透磁率材料、
６……補助磁極、７……高透磁率磁性層、８……
信号記録層。
FIG. 1 is a sectional view showing the configuration of a conventional perpendicular recording device, and FIG. 2 is a sectional view showing the configuration of a main pole excitation type recording device according to an embodiment of the present invention.
FIG. 3 is a diagram showing a change in the recording magnetic field H 0 due to a change in D in the figure. 1... Recording medium, 2... Main magnetic pole, 3... Winding wire,
4... High magnetic permeability side member, 5... High magnetic permeability material,
6...Auxiliary magnetic pole, 7...High permeability magnetic layer, 8...
Signal recording layer.
Claims (1)
磁率薄膜からなる主磁極と、 この主磁極の両側面にそれぞれ設けられた高透
磁率材料からなる側面部材と、 この側面部材及び前記主磁極の周囲に巻回され
た信号電流供給巻線とを具備し、 前記両側側面部材を前記主磁極及び両側面部材
の厚み合計の1/2〜１だけ前記主磁極先端面から
後方へずらして設置したことを特徴とする垂直磁
化記録装置。 ２ 側面部材は先端面がテーパ状に形成されてい
ることを特徴とする特許請求の範囲第１項記載の
垂直磁化記録装置。[Scope of Claims] 1. A main magnetic pole made of a high magnetic permeability thin film that contacts the recording medium and directly participates in recording; a side member made of a high magnetic permeability material provided on both sides of this main magnetic pole; a side member and a signal current supply winding wound around the main magnetic pole; A perpendicular magnetization recording device characterized in that the device is installed offset backward from the center. 2. The perpendicular magnetization recording device according to claim 1, wherein the side member has a tapered end surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15495278A JPS5584015A (en) | 1978-12-18 | 1978-12-18 | Vertical magnetization recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15495278A JPS5584015A (en) | 1978-12-18 | 1978-12-18 | Vertical magnetization recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5584015A JPS5584015A (en) | 1980-06-24 |
| JPS6336042B2 true JPS6336042B2 (en) | 1988-07-19 |
Family
ID=15595495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15495278A Granted JPS5584015A (en) | 1978-12-18 | 1978-12-18 | Vertical magnetization recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5584015A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827859Y2 (en) * | 1979-03-01 | 1983-06-17 | 日産自動車株式会社 | Dust-proof mechanism of power supply trolley |
| US4383284A (en) * | 1979-12-14 | 1983-05-10 | Tokyo Shibaura Denki Kabushiki Kaisha | Perpendicular magnetic head and method of manufacturing the same |
| JPS6334088Y2 (en) * | 1981-02-20 | 1988-09-09 | ||
| JPS6334089Y2 (en) * | 1981-04-20 | 1988-09-09 | ||
| JPS5819717A (en) * | 1981-07-30 | 1983-02-04 | Fujitsu Ltd | Vertical magnetizing recording/reproducing head |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52134706A (en) * | 1976-05-06 | 1977-11-11 | Univ Tohoku | Vertical magnetic recorder reproducer and system therefor |
-
1978
- 1978-12-18 JP JP15495278A patent/JPS5584015A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52134706A (en) * | 1976-05-06 | 1977-11-11 | Univ Tohoku | Vertical magnetic recorder reproducer and system therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5584015A (en) | 1980-06-24 |
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