JPS5832233A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5832233A JPS5832233A JP56130107A JP13010781A JPS5832233A JP S5832233 A JPS5832233 A JP S5832233A JP 56130107 A JP56130107 A JP 56130107A JP 13010781 A JP13010781 A JP 13010781A JP S5832233 A JPS5832233 A JP S5832233A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording medium
- magnetic recording
- thickness
- 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.)
- Granted
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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/842—Coating a support with a liquid magnetic dispersion
- G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気記録体、特に高信頼性、高保磁力を可能に
した徴気エンコーダ用磁気記録体に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium, and particularly to a magnetic recording medium for use in a magnetic encoder that enables high reliability and high coercive force.
一般E1m気記碌体としては、オーディオIIK用いら
れている磁気テープ、コンピュータ等に用いられている
磁気ディスク中磁気ドラム等が知られている。そして、
これらの磁気記録体の磁性膜は高wsue嚢〇九め、膜
厚が0.2〜数μmと極めて′薄く、使用される磁性粉
は長軸長が約0.4−m以下O徴籾子が使用されている
。一方、iI磁気エンコーダ用いられる磁気記分体は、
ag&検出素子と磁気記録体(ディスクまたはドラ74
)と1JI&I隔を黴μm−数百μmと大きくとる!l
!がある大め、lI性鋼は高保磁力が要求堪れる。そし
て、高保磁力を得るためには、磁性材としてメタル(?
・S)を使用し、膜厚を50〜100μms度O厚膜を
必要とする。一方、@頼性0点においては、磁気エンコ
ーダの使用する環境が広範囲であるため、約150℃
以上の耐熱性が要求されている。IfIfK耐熱性の向
上には、従来の磁性粉ては約5ocsi度までの温度保
障しか荀られず、かつ厚膜形成に鯛欠陥の発生、S割れ
の発生、均−塗布が困難である等の間mがあシ、したか
って・信頼牲、耐熱性の優れ九磁気エンコーダ用011
!111を得ることFi極メチvjA′lIA″′cあ
った。As general E1m memory devices, magnetic tapes used in Audio IIK, magnetic disks and magnetic drums used in computers, etc. are known. and,
The magnetic film of these magnetic recording bodies has a high wsue capsule and is extremely thin with a film thickness of 0.2 to several μm. child is used. On the other hand, the magnetic recording body used in the iI magnetic encoder is
ag & detection element and magnetic recording body (disk or driver 74
) and 1JI&I interval is large, from mold μm to several hundred μm! l
! Steels with larger lI properties can meet the requirements for high coercive force. In order to obtain a high coercive force, metal (?
・S) is used, and a film thickness of 50 to 100 μm is required. On the other hand, at @reliability 0 point, the magnetic encoder is used in a wide range of environments, so the temperature is approximately 150°C.
Higher heat resistance is required. In order to improve the IfIfK heat resistance, conventional magnetic powders can only guarantee temperatures up to about 5 ocsi degrees, and there are also problems such as occurrence of defects in thick film formation, occurrence of S cracks, and difficulty in uniform coating. 011 for magnetic encoders with excellent distance, reliability, and heat resistance.
! It was very difficult to obtain 111.
し九がって本発明は、メタル験末の粒子IIO大きいa
性材を用いて磁性IIを形成するととによって、厚II
i能にし、耐熱性を向−せた磁気記鍾体tm供すること
を目的としている。Therefore, the present invention is directed to the use of metal powder particles IIO large a
By forming the magnetic II using a magnetic material, the thickness II
The purpose of the present invention is to provide a magnetic recording body TM which has high performance and heat resistance.
以下興論例を用いて本孔WA!評細に説明する。Honko WA using the following examples! Explain in detail.
本発明は、磁気ディスクとして、例えばムtなどO非磁
性体からなる基板を洗浄し、この基板上にメタル粉末を
添加したS性塗料をスピンナ法により釣soswao厚
さに盪布し、磁場配向してベーキングし良後、着磁して
磁気記―体を完成する。In the present invention, as a magnetic disk, a substrate made of an O non-magnetic material such as Mut is cleaned, and an S-based paint with metal powder added thereto is spread on the substrate to a thickness of about 100 mm using a spinner method, and magnetic field orientation is applied. After baking and magnetizing, the magnetic recorder is completed.
この場合、−龜軸料は、メタル粉末・O充填量(AI剤
を除いた11中のメタル−末O重量比)を65vt%と
じてバインダーにエポキシ―脂を用い、幡剤にトルエン
を用いえ、そして、発明者が種々の条件で実験および検
討を繰〕返した結果、このsum料中に添加させたメI
k@末O長軸径rO大小が耐熱性を大きく左右させてい
ることを見い出した。すなわち、実験として長軸@ri
変えて各種のメタル粉末について塗料化し、高温II(
約150℃)1111中における寿命時間に対する磁気
検出e子om力を調ヘタ結果、111m1に4141k
I(r= 0−41”’a) I 4’i性II (
r 、= O−6μm) * 41性”(r=0−7
Jm) m 1113M (r −04”) e41性
V(rml、OjIm)J性W(r−1−2μm)
で示したヨウ・ )・、1
にメIs−聯末O長軸@rが0.6〜1・0μmO範圃
が比較値以上の出力を得るのに最適であることが判明し
九、こO場合、メタル粉末の長軸11rが0・6μm以
下でFi実用上十分な耐熱性効果is@られず、l・0
μm以上では厚屓形威、S場配肉が容易となる効果が祷
られるが、磁気検出素子OvJ期の出力(磁力)が不足
するという1m@I[がgi生する。In this case, the metal powder/O filling amount (metal powder/O weight ratio in 11 excluding the AI agent) was set at 65% by weight, the binder was epoxy resin, and the binder was toluene. No, and as a result of the inventor's repeated experiments and studies under various conditions,
It has been found that the size of the major axis diameter rO of k@ terminal O greatly influences heat resistance. In other words, as an experiment, the long axis @ri
Instead, various metal powders were made into paints and high temperature II (
(approximately 150℃) Adjusting the magnetic detection force for the life time in 1111, the result is 4141k in 111m1
I (r= 0-41"'a) I 4'i II (
r, = O-6 μm) *41 property” (r = 0-7
Jm) m 1113M (r -04") e41 V (rml, OjIm) J W (r-1-2μm)
It was found that the field where the major axis @r of the main Is-union terminal O is in the range of 0.6 to 1.0 μm is optimal for obtaining an output higher than the comparative value.9. In the case of O, if the long axis 11r of the metal powder is 0.6 μm or less, the heat resistance effect is not sufficient for Fi practical use, and l・0
If it is more than μm, it is hoped that the thickness will be effective and the S-field thickness will become easier, but the output (magnetic force) of the magnetic detection element OvJ period will be insufficient, which is 1m@I [gi].
しfe′tIAって、メタル粉末の長軸径rは品質限界
を考慮すゐと、0・7〜0・8AnxO範囲が最適範囲
とな〕、畜らに偏差(パックdP)を考慮すると0・8
μm□μm後が最良値で6つ・九、また、−法塗料のメ
タル翰末充填量は、約70Wtチ 以上となると、形成
された磁性鋼にクラックが生じ易くな)、約60μ−以
下では形成され九磁性膳に気泡が発生することKなる。Then, considering the quality limit, the optimum range for the major axis diameter r of the metal powder is 0.7 to 0.8 AnxO. Considering the deviation (pack dP), the optimum range is 0.・8
The best value after μm □ μm is 6.9, and the amount of metal powder filling of the -legal paint is about 70 Wt (if it is more than 70 Wt, cracks are likely to occur in the formed magnetic steel), and it is about 60 μ or less. This will result in the formation of air bubbles in the magnetic bowl.
し九がって、メタル看末充填量Fi65±5vt%O範
囲内が品質限界から考慮して最適範囲であった。まえ、
碑性羨厚は 92mに示したよ5に着磁ピッチ0・1−
の場合、−気検出出力に比例するので、膜厚が約70x
m以上となると、出力かほぼでjiiとなる。しえがっ
て、高出力を得ることと、プロセメの一差(バックdP
)とを考慮して、出力が若干飽和しかつ膜厚が安定して
形成でする約804m1illの厚膜で形威すれ#i^
い。Therefore, considering the quality limit, the optimum range was the metal filling amount Fi65±5vt%O. front,
The magnetic field thickness is shown at 92m.The magnetization pitch is 0.1-5.
In the case of , the film thickness is approximately 70x because it is proportional to the -qi detection output.
When it becomes more than m, the output becomes approximately jii. However, there is a difference between obtaining high output and proceme (back dP
), the output will be slightly saturated and the film thickness will be stable, forming a thick film of approximately 804ml. #i^
stomach.
なお、上記*論例においては、磁気記鍮体としてディス
クを用いた場合にりいて脱明したが、本孔f!はこれに
限定されるものではなく、ドラムを用いても全く同様O
効果が得られることは勿論であみ。Note that in the *example above, the problem was solved when a disk was used as the magnetic recording body, but the main hole f! is not limited to this, and even if a drum is used, it can be done in the same way.
Of course, it is effective.
以上脱調したように本発明によれば、約150℃以上耐
熱性を有し、かつ厚motj能なl11性鯛會祷ること
ができるので、信頼性の高い磁気エンコーダを提供でき
るという極めて優れた効果が得られる。As mentioned above, according to the present invention, it is possible to provide a highly reliable magnetic encoder that has heat resistance of about 150° C. or more and is capable of producing a thick 111-degree sea bream. You can get the same effect.
第1図はメタル粉末の長軸径をパラメータとして寿命時
間に対する磁気検出素子の出力の関係を示す特性図、第
2図は磁性膜厚に対する出力の関係を示す特性図である
。
第1II
#r’MriiI(gi)AI)FIG. 1 is a characteristic diagram showing the relationship between the output of the magnetic sensing element and the life time using the major axis diameter of the metal powder as a parameter, and FIG. 2 is a characteristic diagram showing the relationship between the output and the magnetic film thickness. Part 1 II #r'MriI(gi)AI)
Claims (1)
体において、前記磁性膜は粒径が0.6〜1.0μmの
メタル磁性粉で形成したことを特徴とする磁気記録体。1. A magnetic recording medium comprising a magnetic film deposited on a non-magnetic substrate, characterized in that the magnetic film is formed of metal magnetic powder having a particle size of 0.6 to 1.0 μm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56130107A JPS5832233A (en) | 1981-08-21 | 1981-08-21 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56130107A JPS5832233A (en) | 1981-08-21 | 1981-08-21 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5832233A true JPS5832233A (en) | 1983-02-25 |
JPH0253850B2 JPH0253850B2 (en) | 1990-11-20 |
Family
ID=15026114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56130107A Granted JPS5832233A (en) | 1981-08-21 | 1981-08-21 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5832233A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6478424A (en) * | 1988-08-12 | 1989-03-23 | Hitachi Ltd | Magnetic recording body |
JPH03130615A (en) * | 1989-09-18 | 1991-06-04 | Torrington Co:The | High-resolution coder |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50133806A (en) * | 1974-04-09 | 1975-10-23 | ||
JPS54125538A (en) * | 1978-03-22 | 1979-09-29 | Matsushita Electric Ind Co Ltd | Gas trier control device |
JPS5613526A (en) * | 1979-07-11 | 1981-02-09 | Tdk Corp | Magnetic recording medium |
JPS5616604A (en) * | 1979-07-20 | 1981-02-17 | Mitsubishi Metal Corp | Manufacture of ferromagnetic iron-cobalt alloy powder |
-
1981
- 1981-08-21 JP JP56130107A patent/JPS5832233A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50133806A (en) * | 1974-04-09 | 1975-10-23 | ||
JPS54125538A (en) * | 1978-03-22 | 1979-09-29 | Matsushita Electric Ind Co Ltd | Gas trier control device |
JPS5613526A (en) * | 1979-07-11 | 1981-02-09 | Tdk Corp | Magnetic recording medium |
JPS5616604A (en) * | 1979-07-20 | 1981-02-17 | Mitsubishi Metal Corp | Manufacture of ferromagnetic iron-cobalt alloy powder |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6478424A (en) * | 1988-08-12 | 1989-03-23 | Hitachi Ltd | Magnetic recording body |
JPH0514331B2 (en) * | 1988-08-12 | 1993-02-24 | Hitachi Ltd | |
JPH03130615A (en) * | 1989-09-18 | 1991-06-04 | Torrington Co:The | High-resolution coder |
Also Published As
Publication number | Publication date |
---|---|
JPH0253850B2 (en) | 1990-11-20 |
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