JPH028370B2 - - Google Patents
Info
- Publication number
- JPH028370B2 JPH028370B2 JP56170913A JP17091381A JPH028370B2 JP H028370 B2 JPH028370 B2 JP H028370B2 JP 56170913 A JP56170913 A JP 56170913A JP 17091381 A JP17091381 A JP 17091381A JP H028370 B2 JPH028370 B2 JP H028370B2
- Authority
- JP
- Japan
- Prior art keywords
- present
- layer
- thickness
- magnetic
- dropouts
- 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 23
- 239000000758 substrate Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- 229910002441 CoNi Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 125000005487 naphthalate group Chemical group 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/735—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
Landscapes
- Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
Description
【発明の詳細な説明】
本発明は高分子成形物基板を支持体とする強磁
性金属薄膜形の磁気記録媒体に係わり、テープ、
デイスク等の形態によらず、ドロツプアウトの少
ない磁気記録媒体の提供を目的とするものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ferromagnetic metal thin film type magnetic recording medium having a polymer molded substrate as a support, and relates to a magnetic recording medium having a tape,
The object of the present invention is to provide a magnetic recording medium with less dropout, regardless of the form of the disk or the like.
磁気記録分野では、高密度記録の追求が今日で
も続けられている。 In the field of magnetic recording, the pursuit of high-density recording continues even today.
最近になり、蒸着テープの一部実用化により、
垂直記録方式を含めた金属薄膜形記録媒体の出現
により、考えられる媒体が出つくした感がある。 Recently, with the practical use of some vapor-deposited tapes,
With the advent of metal thin film recording media, including perpendicular recording systems, it seems that all possible media have been discovered.
しかし短波長記録になる程、周囲環境の影響を
受けてドロツプアウトを生ずる確率が増す問題が
あり、その解決が望まれている。 However, there is a problem that the shorter the wavelength recording, the higher the probability of dropout occurring due to the influence of the surrounding environment, and a solution to this problem is desired.
本発明は、実使用環境下でのくり返し使用によ
るドロツプアウトの増加を抑制し得る媒体の提供
を目指すもので、大気中のじん埃等の影響を媒体
の構成により吸収するものである。以下に図面を
用い本発明の実施例を説明する。 The present invention aims to provide a medium that can suppress the increase in dropouts due to repeated use under actual use environments, and the structure of the medium absorbs the effects of dust and the like in the atmosphere. Embodiments of the present invention will be described below with reference to the drawings.
第１〜第３図に本発明の実施例を示す。 Embodiments of the present invention are shown in FIGS. 1 to 3.
なおここで各図に共通の要素についてあらかじ
め詳述する。 Here, elements common to each figure will be explained in detail in advance.
支持体１は高分子成形物であり、かつ、エレク
トレツトであることと、端部１Ａ，１Ｂを除いて
（デイスクでも考え方は同じである。）磁性層２と
非磁性層３により、電気的にシールドされている
ことが重要である。これにより端部１Ａ，１Ｂへ
のじん埃付着確率を大きくすることができ、かつ
静電吸着力が大きいため、磁性面側にじん埃がと
り込まれ、ドロツプアウトにつながることを未然
に防げることになるのが本発明のポイントであ
る。 The support 1 is a polymer molded product and is electret, and the magnetic layer 2 and non-magnetic layer 3 provide electrical power, except for the end portions 1A and 1B (the same concept applies to disks). It is important that it is shielded. This increases the probability of dust adhering to the ends 1A and 1B, and since the electrostatic adsorption force is large, it is possible to prevent dust from being drawn into the magnetic surface side and causing dropouts. This is the key point of the present invention.
４は走行性を助けるための有機塗布層である
（勿論、無機の微粒子を含む場合もある。）。 4 is an organic coating layer to aid running properties (of course, it may also contain inorganic fine particles).
第２図における５は非磁性下地層で、このタイ
プには、非磁性層、磁性層の多層構成をとつた場
合も含まれる。 Reference numeral 5 in FIG. 2 is a nonmagnetic underlayer, and this type also includes a multilayer structure of a nonmagnetic layer and a magnetic layer.
第３図では、磁性面上に有機又は無機の保護層
６を配した場合を示してある。 FIG. 3 shows a case where an organic or inorganic protective layer 6 is disposed on the magnetic surface.
更に本発明の要件を満足した他の組み合わせも
当然予想され、そのいずれも、本発明に含むもの
であることは勿論である。 Further, other combinations that satisfy the requirements of the present invention are naturally expected, and it goes without saying that the present invention includes any of them.
本発明の効果はエレクトレツト化する手段によ
らず同一であるし、磁性層、非磁性層の形成手段
にも依存しない。 The effects of the present invention are the same regardless of the means of electrification, and are independent of the means of forming the magnetic layer and nonmagnetic layer.
本発明による媒体を最も容易に製造するには、
高エネルギー電子ビームを加熱源（例えば
30KV，5A）とした電子ビーム蒸着により磁性層
を形成し、かつ、高速マグネトロンスパツタによ
り、非磁性層（この層は磁性層の1/10程度の厚み
で充分しうるからである。）を形成すると同時に、
みかけ上の静電気中和作用を施すことが達成され
る。 The easiest way to manufacture the media according to the invention is to
A high-energy electron beam is used as a heating source (e.g.
A magnetic layer was formed by electron beam evaporation (30 KV, 5 A), and a non-magnetic layer (about 1/10 the thickness of the magnetic layer is sufficient for this layer) was formed by high-speed magnetron sputtering. At the same time as forming
An apparent static neutralization effect is achieved.
次により具体的に本発明の実施例を説明する。 Next, embodiments of the present invention will be described in more detail.
（実施例 １）
ポリエチレンテレフタレートフイルム基板（厚
さ9.5μm）上に、Co80％、Ni20％に酸素をCoに
対して15原子％含んだ磁性層を0.15μmの厚さに
配し、反対側の面に、Cu層を0.01μmの厚さに配
し、カーボンを分散させたエポキシコート層を
0.2μmの厚さに配した磁気記録媒体を、比較検討
した。(Example 1) On a polyethylene terephthalate film substrate (thickness 9.5 μm), a magnetic layer containing 80% Co, 20% Ni, and 15 atomic % oxygen relative to Co was arranged to a thickness of 0.15 μm, and the magnetic layer on the opposite side was A Cu layer with a thickness of 0.01 μm is placed on the surface, and an epoxy coat layer with carbon dispersed in it.
A comparative study was conducted of magnetic recording media arranged at a thickness of 0.2 μm.
20kevの電子を0.1mA／cm2で10秒間照射しエレ
クトレツト化した場合と、通常の基板を用いた場
合のそれぞれについて、テープ幅1/4″，1/2″の両
者を準備した。15μmと45μmのドロツプアウト
（相対速度4m／sec、記録波長0.7μm）をカウン
トした結果、本発明によるものは500パス（テー
プ長100m）で特に増減がみられず、かつ、絶対
数も、夫々0.1ケ／min以下であつたのに対し、
従来例では、ランダムに増減があり、最大で５
ケ／minもの多数のドロツプアウトの発生がみら
れた。 Both tape widths of 1/4'' and 1/2'' were prepared for the case where 20keV electrons were irradiated for 10 seconds at 0.1mA/cm 2 to form an electret, and the case where a normal substrate was used. As a result of counting dropouts of 15 μm and 45 μm (relative speed 4 m/sec, recording wavelength 0.7 μm), the method according to the present invention showed no particular increase or decrease over 500 passes (tape length 100 m), and the absolute number was 0.1 for each. While the temperature was less than ke/min,
In the conventional example, there is a random increase or decrease, with a maximum of 5
A large number of dropouts occurred as many times as 5/min.
（実施例 ２）
ポリアミドフイルム基板（厚さ9.5μm）上に
Co83％、Cr17％の垂直記録層を0.2μmの厚さに
形成し、反対側の面にCr層を0.007μmの厚さに配
し、炭化カルシウムの微粒子を分散させたエポキ
シ塗布層をその上に0.16μmの厚さに配した磁気
記録媒体を比較検討した。(Example 2) On a polyamide film substrate (thickness 9.5 μm)
A perpendicular recording layer of 83% Co and 17% Cr is formed to a thickness of 0.2 μm, a Cr layer is placed on the opposite side to a thickness of 0.007 μm, and an epoxy coating layer with fine particles of calcium carbide dispersed thereon is applied. A comparative study was conducted on magnetic recording media arranged at a thickness of 0.16 μm.
ポリアミドフイルム基板をあらかじめ30kevの
電子を0.07mA／cm2で10sec間照射しエレクトレツ
ト化した本発明によるものと、通常の基板を用い
た従来例とをテープ幅1/4″，1/2″の２種類準備
し、リングヘツドで記録再生した場合のドロツプ
アウトを実施例１の条件と同一条件で比較した。 The present invention, in which a polyamide film substrate is electrified by irradiating it with 30keV electrons at 0.07mA/cm 2 for 10 seconds, and the conventional example, which uses a normal substrate, have tape widths of 1/4" and 1/2". Two types of recording media were prepared, and the dropout when recorded and reproduced using a ring head was compared under the same conditions as in Example 1.
その結果本発明によるものはドロツプアウトの
増減はほとんどなく、個数も夫々0.2ケ／min以
下であつたのに対し従来品は増減がみられ、最大
６ケ／minもの多数のドロツプアウトが観測され
た。 As a result, with the product according to the present invention, there was almost no increase or decrease in dropouts, and the number of dropouts was less than 0.2 dropouts/min, whereas with the conventional product, an increase or decrease was observed, and a large number of dropouts of up to 6 dropouts/min were observed.
このことは、デイスクにしても同様の傾向であ
り、第２図、第３図の構成であつても同一であつ
た。基板の種類として他にポリアセテート、ポリ
イミド、ポリカーボネート、ポリエチレン２―６
ナフタレートについて、厚みも4μmから31μmま
で実施したがこれら基板の種類に関係なく本発明
の効果を確認した。また、エレクトレツト化の手
段として他に熱、光などの公知の他のエレクトレ
ツト化手段を用いたが、有意差はみられなかつ
た。 This is a similar tendency for disks, and was the same for the configurations shown in FIGS. 2 and 3. Other substrate types include polyacetate, polyimide, polycarbonate, and polyethylene 2-6.
For naphthalate, the thickness was varied from 4 μm to 31 μm, and the effects of the present invention were confirmed regardless of the type of these substrates. In addition, other known electrification methods such as heat and light were used as the electrification method, but no significant difference was observed.
磁性層もCo，CoNi系合金、Co―Fe系合金、
Co―Cr系合金、Fe等を0.05μm〜0.3μmの厚さと
したもの非磁性層としてTi，Si，Cr，Al，Mo，
Ｗ，Cu，NiCr等を0.005μm〜0.1μmの厚さとした
ものについて調べたが、これらのいずれについて
も本発明の効果を確認することができた。 The magnetic layer is also made of Co, CoNi alloy, Co-Fe alloy,
Co-Cr alloy, Fe, etc. with a thickness of 0.05μm to 0.3μm.Ti, Si, Cr, Al, Mo, etc. as a nonmagnetic layer.
We investigated materials made of W, Cu, NiCr, etc. with a thickness of 0.005 μm to 0.1 μm, and the effects of the present invention could be confirmed for all of them.
なお上記の組み合わせは本発明を限定するもの
ではなく、適宜組み合わせて選択可能である。 Note that the above combinations do not limit the present invention, and can be selected in combination as appropriate.
本発明による磁気記録媒体は、民生用は勿論、
コンピユータユースにも供し得る信頼性を有する
もので、その産業上の意義は極めて大きい。 The magnetic recording medium according to the present invention can be used not only for consumer use but also for consumer use.
It has a reliability that can be used for computer use, and its industrial significance is extremely large.
第１図は本発明による磁気記録媒体の一部破断
斜視図、第２図、第３図は同じく本発明による磁
気記録媒体の断面図である。
１……支持体、２……磁性層、３……非磁性
層、４……有機塗布層、５……非磁性下地層、６
……保護層。
FIG. 1 is a partially cutaway perspective view of a magnetic recording medium according to the present invention, and FIGS. 2 and 3 are sectional views of the magnetic recording medium according to the present invention. DESCRIPTION OF SYMBOLS 1...Support, 2...Magnetic layer, 3...Nonmagnetic layer, 4...Organic coating layer, 5...Nonmagnetic underlayer, 6
...protective layer.
Claims (1)
方の面に強磁性金属層を配し、もう一方の面に非
磁性金属層を配したことを特徴とする磁気記録媒
体。1. A magnetic recording medium characterized in that a ferromagnetic metal layer is arranged on one side of an electret polymer molded substrate and a nonmagnetic metal layer is arranged on the other side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56170913A JPS5873016A (en) | 1981-10-26 | 1981-10-26 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56170913A JPS5873016A (en) | 1981-10-26 | 1981-10-26 | Magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5873016A JPS5873016A (en) | 1983-05-02 |
| JPH028370B2 true JPH028370B2 (en) | 1990-02-23 |
Family
ID=15913659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56170913A Granted JPS5873016A (en) | 1981-10-26 | 1981-10-26 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5873016A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2620190B2 (en) * | 1993-07-08 | 1997-06-11 | 株式会社イトックス | Packing duvet with lid for furniture etc. |
| JP2620189B2 (en) * | 1993-07-08 | 1997-06-11 | 株式会社イトックス | Packing duvet with lid for furniture etc. |
-
1981
- 1981-10-26 JP JP56170913A patent/JPS5873016A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5873016A (en) | 1983-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH028370B2 (en) | ||
| US4604293A (en) | Process for producing magnetic recording medium | |
| JPS58166531A (en) | perpendicular magnetic recording medium | |
| JPH0711857B2 (en) | Magnetic recording medium | |
| JP2561455B2 (en) | Magnetic recording / reproducing device | |
| JP2532503B2 (en) | Magnetic recording media | |
| JPH103642A (en) | Magnetic recording media | |
| JPS586528A (en) | Flexible magnetic recording medium | |
| JPS62110619A (en) | Magnetic recording medium | |
| JPH01105317A (en) | magnetic recording medium | |
| JPS62125524A (en) | magnetic recording medium | |
| JPS5873019A (en) | Manufacture for magnetic recording medium | |
| JPH01176313A (en) | magnetic recording medium | |
| JPH0268712A (en) | Thin film magnetic recording medium | |
| JPH01319119A (en) | Magnetic recording medium | |
| JPH01184717A (en) | Magnetic recording medium | |
| JPH0793751A (en) | Method of manufacturing magnetic recording medium | |
| JPS61284830A (en) | magnetic recording medium | |
| JPS62102416A (en) | Magnetic recording medium | |
| JPS60217520A (en) | Magnetic recording medium | |
| JPH01303623A (en) | Magnetic recording medium | |
| JPS615424A (en) | magnetic recording medium | |
| JPH08273150A (en) | Magnetic recording media | |
| JPS60211617A (en) | magnetic recording medium | |
| JP2004039078A (en) | Magnetic recording media |