JPS63106925A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPS63106925A JPS63106925A JP25284886A JP25284886A JPS63106925A JP S63106925 A JPS63106925 A JP S63106925A JP 25284886 A JP25284886 A JP 25284886A JP 25284886 A JP25284886 A JP 25284886A JP S63106925 A JPS63106925 A JP S63106925A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- rolled
- atmosphere
- tension
- flexible substrate
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000007740 vapor deposition Methods 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 230000003647 oxidation Effects 0.000 claims abstract description 7
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 18
- 239000010409 thin film Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 abstract description 12
- 230000001590 oxidative effect Effects 0.000 abstract description 7
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 7
- 230000001133 acceleration Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 Co–Ni Inorganic materials 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 229910020637 Co-Cu Inorganic materials 0.000 description 1
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- 229910017060 Fe Cr Inorganic materials 0.000 description 1
- 229910002544 Fe-Cr Inorganic materials 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 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
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁気記録媒体の製造方法に関し、より詳しくは
耐候特性に優れた金属薄膜型磁気記録媒体の製造方法に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a magnetic recording medium, and more particularly to a method for manufacturing a metal thin film type magnetic recording medium with excellent weather resistance.
磁気記録媒体として従来使用されてきたのは、非磁性基
体上に粉末磁性粉を有機バインダー等と共に塗布乾燥せ
しめたいわゆる1塗布型」磁気記録媒体である。一方近
年における高密度記録−・の高まる要求と共に、いわゆ
る「金属薄膜型、磁気記録媒体への期待が高まり着実な
開発・研究がなされている。What has been conventionally used as a magnetic recording medium is a so-called one-coating type magnetic recording medium in which powdered magnetic powder is coated on a non-magnetic substrate together with an organic binder and dried. On the other hand, with the increasing demand for high-density recording in recent years, expectations for so-called ``metal thin film type magnetic recording media'' have increased, and steady development and research is being carried out.
上記「金属薄膜型j磁気記録媒体は電磁変換特性、記録
密度といった点では従来の「塗布型、磁気記録媒体に比
べ大きな潜在能力を持っているものの、その宿命的な弱
点として耐候特性の弱さがあげられる。例えばポリエス
テルフィルム上にコバルトを斜め蒸着したいわゆる蒸着
テープについて云えば60と20%RH雰囲気下に1週
間程度放置するだけで錆が発生し、デツキで記録再生を
した場合ヘッド目詰まりをひきおこす、あるいはまたこ
の雰囲気中に微量のNa(J微結晶をゾル状にて含める
、あるいはまた/ppm程度の亜硫酸ガスを導入する等
のことをすればこの錆は更に進行し、実用化に大きな障
害となっている。更に、高温高湿雰囲気下に放置した場
合金属膜の酸化が進行し総磁束量がI割以上域じてしま
うといった問題もある。Although the above-mentioned "metal thin-film type magnetic recording media have greater potential than conventional coating-type magnetic recording media in terms of electromagnetic conversion characteristics and recording density, their fateful weakness is that they have poor weather resistance." For example, so-called vapor-deposited tape, which is made by obliquely vapor-depositing cobalt on a polyester film, will rust if left in an atmosphere of 60% and 20% RH for about a week, and will clog the head if recorded and played back on a deck. This rust will progress even further if a small amount of Na (J) microcrystals is introduced in the form of a sol into this atmosphere, or if sulfur dioxide gas of about /ppm is introduced. Furthermore, if the metal film is left in a high-temperature, high-humidity atmosphere, oxidation of the metal film progresses and the total amount of magnetic flux increases by more than 10%.
この、金属薄膜型媒体の耐候特性不良という問題は広く
認識されており耐候性を改良する手法が種々提案されて
いる。しかるにその多(はその効果が充分と云えない。This problem of poor weather resistance of metal thin film media is widely recognized, and various methods have been proposed to improve the weather resistance. However, the effect cannot be said to be sufficient.
あるいはまた大規模な装置を要し生産性に乏しい、ある
いはまた他の緒特性例えば電磁変換特性を犠牲にしてし
まう等々の問題を有しており、より簡便で効果の大きい
耐候特性の改良が望まれていた。Alternatively, there are problems such as requiring large-scale equipment and poor productivity, or sacrificing other characteristics such as electromagnetic conversion characteristics.Therefore, it is desirable to improve weather resistance characteristics, which is simpler and more effective. It was rare.
本発明は以上の事情に鑑みなされたもので、その目的と
するところは耐候特性、および保存安定性の改良された
磁気記録媒体の製造方法を提供するにある。The present invention was made in view of the above circumstances, and its purpose is to provide a method for manufacturing a magnetic recording medium with improved weather resistance and storage stability.
本発明は、可とう性基体上に巻取蒸着法により磁性金属
、合金薄膜を設けるに際し、可とう性基体の幅をbmm
、厚さをtmmとした時13.!×1010−8b−重
以上の巻取張力にて巻取蒸着を
重板下の巻取張力にて上記巻取蒸着品を巻きかえし、酸
化加速雰囲気下に保存すること7に特徴とする磁気記録
媒体の製造方法に関する。In the present invention, when a magnetic metal or alloy thin film is provided on a flexible substrate by a winding vapor deposition method, the width of the flexible substrate is reduced to bmm.
, when the thickness is tmm13. ! ×1010-8b-Magnetic recording characterized in that the above-described rolled vapor-deposited product is re-wound with a winding tension of at least 100 lbs., and then the above-mentioned rolled vapor-deposited product is re-wound with a winding tension of less than 100 lbs., and stored in an oxidizing acceleration atmosphere. The present invention relates to a method for producing a medium.
本発明の可とう性基体としては主としてポリエチレンテ
レフタレート、ポリイミド、ポリアミド、ポリ塩化ビニ
ル、三酢酸セルロース、ポリカポネート、ポリエチレン
ナフタレート等のプラスチック製基体である。The flexible substrate of the present invention is mainly a plastic substrate such as polyethylene terephthalate, polyimide, polyamide, polyvinyl chloride, cellulose triacetate, polycaponate, polyethylene naphthalate, or the like.
本発明の磁性金属、合金としてはFe、Co、Ni等の
金属あるいはFe−Co、Fe−Ni。The magnetic metals and alloys of the present invention include metals such as Fe, Co, and Ni, or Fe-Co and Fe-Ni.
Co−Ni、Fe−Co−Ni、Fe−Rh。Co-Ni, Fe-Co-Ni, Fe-Rh.
Co−Cu、Co−Pr、Co−8m、Co−t、Ni
−Cu、Co−Cr、Fe−Cr、Ni −Cr等であ
る。基体上に薄膜形態にて作成された磁性金属、合金は
一部酸化、および/または窒化等することによりより望
ましい特性を持たせうろことが多い。特に好ましいのは
coあるいはC。Co-Cu, Co-Pr, Co-8m, Co-t, Ni
-Cu, Co-Cr, Fe-Cr, Ni-Cr, etc. Magnetic metals and alloys formed in the form of a thin film on a substrate are often partially oxidized and/or nitrided to impart more desirable characteristics. Particularly preferred is co or C.
を70Hi%以上含有するような合金である。It is an alloy containing 70Hi% or more of.
巻取蒸着装置の一例を第1図に示す。この装置を使用し
た際巻取蒸着品の作成は以下の様に行なう。すなわち、
可とう性基体7を送り出しロール6より送り出し、冷却
ドラムタに沿って移動せしめて巻き取りロールtaに巻
き取る。この量子型3において蒸着が行なわれる。第1
図に示したのはいわゆる斜め蒸着法により磁性膜を作成
するような手法であり、マスクlλにより入射蒸気流の
一部を規制しつつ成膜が行なわれる。またガス導入口/
/より酸化性ガス等を導入して磁気特性をコントロール
する等の既知の方法を用いることもできる。この第1図
に示した装置では巻取りロールtaに巻かれる際の張力
をコントロールすることにより、本発明の巻取張力を設
定することが可である。上記巻取張力は可とう性基体の
幅’Itbmm、以上であることが望ましい。An example of a winding vapor deposition apparatus is shown in FIG. When using this apparatus, a rolled vapor-deposited product is prepared as follows. That is,
The flexible substrate 7 is sent out from the delivery roll 6, moved along the cooling drum ta, and wound up on the take-up roll ta. Vapor deposition takes place in this quantum type 3. 1st
What is shown in the figure is a method of forming a magnetic film by a so-called oblique evaporation method, in which film formation is performed while partially regulating the incident vapor flow using a mask lλ. Also, gas inlet/
It is also possible to use known methods such as controlling the magnetic properties by introducing an oxidizing gas or the like. In the apparatus shown in FIG. 1, the winding tension of the present invention can be set by controlling the tension when winding around the winding roll ta. It is desirable that the winding tension is equal to or greater than the width of the flexible substrate.
上限については特に規定しないが例えばi o −6−
kg重程にもなると、プラスチック製基体が変形を
する恐れがあり好ましくない。The upper limit is not particularly stipulated, but for example, i o -6-
If the weight exceeds 1 kg, the plastic substrate may be deformed, which is not preferable.
さら<、t3.夕×1O−8と4W以下であると特に基
体幅すが300 mm以上にもなった時ローラー平行度
等の関係でシワが生じやすくなり、またこのことは冷却
ドラムタ、送り出しロール乙の張力にも関係することが
あるが、基体の冷却が充分に行なわれず、高温のルツボ
lOから大量の放射熱を受け、基体が熱ダメージを5け
ろといったことになりかねない。これらはいずれも得率
を減じせしめ望ましくない。Sara<, t3. If the width is less than 4W and the width of the substrate is 300 mm or more, wrinkles are likely to occur due to the parallelism of the rollers, etc., and this will also affect the tension of the cooling drum and the delivery roll. This may also be related, but the substrate may not be cooled sufficiently and may receive a large amount of radiant heat from the high-temperature crucible 1O, resulting in severe thermal damage to the substrate. All of these are undesirable as they reduce the yield.
このようにして得られた巻取蒸着品を蒸着装置から取り
出し、巻きかえし、および保存処理を行なう。すなわち
、可とう性基体の幅をt) mm 、厚さをtmmとし
た時巻取張力13.zxtO−8したロールが型くずれ
を起こしてしまう心配があり望ましくない。この巻きか
えしを行なう雰囲気は通常の大気中で良い。The thus obtained rolled vapor-deposited product is taken out from the vapor deposition apparatus, rewound, and subjected to preservation treatment. That is, when the width of the flexible substrate is t) mm and the thickness is tmm, the winding tension is 13. This is undesirable because there is a risk that the zxtO-8 roll will lose its shape. The atmosphere in which this rewinding is performed is normal air.
こうして巻きかえした巻取蒸着品を一定時間以土酸化加
速雰囲気下で保存する。ここで一定時間とはフィルム巾
、巻取張力により異なるが72時間以上が好ましい。酸
化加速雰囲気とは酸素、オゾン等の酸化性ガスを含むガ
ス中ということであって、例えば大気中であってもよい
。また加圧した酸化性ガス含有雰囲気でもよい。The rolled vapor-deposited product thus rewound is stored in an atmosphere that accelerates oxidation for a certain period of time. Here, the certain period of time varies depending on the film width and winding tension, but is preferably 72 hours or more. The oxidation acceleration atmosphere refers to a gas containing an oxidizing gas such as oxygen or ozone, and may be, for example, the atmosphere. Alternatively, a pressurized oxidizing gas-containing atmosphere may be used.
第1図に示した蒸着装置を使用し、りμm厚のポリエチ
レンテレフタレート基体上に斜め蒸着法によりCo g
o Ni 20(atom%)蒸着磁性薄膜を形成した
。基体はフィルム幅toomm全長lroomのものを
使用した。搬送スピードコrm/分、入射角0m1n=
コ!0、膜厚、2000Xとし、かつガス導入口//よ
り02ガスを蒸着室内真空度がJ、0x10 To
r−rとなるよう導入しつつ蒸着を行なった。Using the vapor deposition apparatus shown in Fig. 1, Cog
o Ni 20 (atom%) was deposited to form a magnetic thin film. The substrate used had a film width of toomm and a total length of 1room. Conveying speed rm/min, incident angle 0m1n=
Ko! 0, film thickness is 2000X, and 02 gas is introduced from the gas inlet // in the vacuum chamber of the evaporation chamber is J, 0x10 To
Vapor deposition was performed while introducing the material so that the relationship was rr.
このとき巻取張力はコ、jkg重とし、この条件で3本
の巻取蒸着品を作成した。この内1本は常温常湿の大気
中に!日間放置したままとした。At this time, the winding tension was set to j kg, and three rolled vapor-deposited products were created under these conditions. One of these is in the atmosphere at normal temperature and humidity! It was left as it was for several days.
(これをサンプル甲と呼ぶ)また1本は巻取張力/、7
jkgWにて巻きかえして同じくj日間放置した(サン
プル乙)。また別の1本は巻取張力lkp重にて巻きか
えして同じくj日間放置した(サンプル丙)。(This is called the sample A) Also, one is the winding tension /, 7
It was re-wound with jkgW and left for the same j days (Sample B). Another one was re-wound at a winding tension of lkp and left for j days (sample C).
こうして得られた3サンプルから各々joom間隔でμ
本のサンプルを/ OFFI / m X 7!?Fl
/ mの大きさで切りだした(甲l〜甲ダ、乙l〜乙μ
、丙l〜丙≠と呼ぶ。番号の小さいものが巻きの中心側
に対応する)以上/λ本のサンプルをto 0CりO%
RH雰囲気下に1週間放置しその前後での総磁束量φm
(M x / Crn)の変化率−Δφm/φmを測
定した。下表に結果を示す(数値は%)表
この変化率−Δφm/φmは数値が小さい程耐候特性が
優れている。サンプル乙は甲に比べ若干良化しているが
、サンプル丙はロール全長にわたってほぼ同程度の低い
値を示し、明らかに耐候特性向上の効果がみられる。From the three samples obtained in this way, μ
Book sample / OFFI / m x 7! ? Fl
/ I cut it out to the size of m (Ko l ~ Ko da, Otsu l ~ Otsu μ
, Hei l ~ Hei ≠. The smaller number corresponds to the center side of the winding) or more/λ samples to 0%
Total magnetic flux φm before and after leaving it in RH atmosphere for one week
The rate of change of (M x / Crn) - Δφm/φm was measured. The results are shown in the table below (values are %). The smaller the value of this rate of change -Δφm/φm, the better the weather resistance. Sample B is slightly better than A, but sample C shows almost the same low values over the entire length of the roll, clearly showing the effect of improved weather resistance.
以上のように本発明の方法を用いることにより耐候特性
、保存安定性に優れた金属薄膜型磁気記録媒体を簡便に
かつ均一に製造できる。As described above, by using the method of the present invention, metal thin film magnetic recording media with excellent weather resistance and storage stability can be easily and uniformly produced.
第1図は巻取蒸着装置を示す。
l・・・真空槽
t・・・送り出しローラ
タ・・・冷却ドラム
10・・・蒸発源
/I・・・ガス導入口
lμ−巻取ローラ
特許出願人 富士写真フィルム株式会社手続補正帯
昭和47年72−月に日
1、事件の表示 昭和67年特願第コ!2t4A
r号2、発明の名称 磁気記録媒体の製造方法3、
補正をする者
事件との関係 特許出願人
4、補正の対象 明細書の[特許請求の範囲Jの欄及
び「発明の詳細な説明」
の欄
5、補正の内容
l) 明細書の「特許請求の範囲」の欄を別紙のごとく
補正する。
コ)明細書第λ頁13行目の
「toとりO傷」を
「to0cyo係」
と補正する。
3) 同書第3頁lヂ行目の
「を關」を
f” tmJ
と補正する。
4I−)回書第!頁/j行目の
「を鰭」を
rtff!J
と補正する。
! 同書第を頁73行目の
「を鱈」を
(−tmJ
と補正する。
「別紙」
2、特許請求の範囲
可とう性基体上に巻取蒸着法により磁性金属、合金薄1
!1tl−設けるに際し、可とう性基体の幅をbw、厚
さをtmとした時
/ J、jX/ 0−8”Kg重以上の巻取張力にて巻
を
取蒸着品を作成し、しかる後に
/J、zxlo−8uK4重以下の巻取張力にて該を
蒸着品を巻きかえし、酸化加速雰囲気中に保存すること
を特徴とする磁気記録媒体の製造方法。FIG. 1 shows a winding vapor deposition apparatus. l...Vacuum tank t...Feeding roller...Cooling drum 10...Evaporation source/I...Gas inlet lμ-Take-up roller Patent applicant Fuji Photo Film Co., Ltd. Procedure correction band 1972 72-Monday 1st, Incident Display 1986 Patent Application No. 1! 2t4A
r No. 2, title of invention: method for manufacturing magnetic recording medium 3,
Relationship with the case of the person making the amendment Patent applicant 4, subject of the amendment [Claims J column and “Detailed Description of the Invention” column 5, Contents of the amendment L) of the specification] Correct the "Range of" column as shown in the attached sheet. e) Correct "to tori o scratch" on page λ, line 13 of the specification to "to0 cyo". 3) Correct “wo 關” on page 3, line 1 of the same book to f” tmJ. 4I-) Correct “wo fin” on page !/line j of the circular to rtff! Correct it with J. ! ``O cod'' on page 73 of the same book is corrected to (-tmJ).
! 1tl- When the width of the flexible substrate is bw and the thickness is tm / J, j /J, zxlo-8uK A method for manufacturing a magnetic recording medium, characterized in that the deposited product is rewound at a winding tension of less than 4 times and stored in an oxidizing acceleration atmosphere.
Claims (1)
金薄膜を設けるに際し、可とう性基体の幅をbmm、厚
さをtmmとした時 ¥13.5×10^−^8b/tkg重以上¥の巻取張
力にて巻取蒸着品を作成し、しかる後に ¥13.5×10^−^8b/tkg重以下¥の巻取張
力にて該蒸着品を巻きかえし、酸化加速雰囲気中に保存
することを特徴とする磁気記録媒体の製造方法。(1) When providing a magnetic metal or alloy thin film on a flexible substrate by the winding vapor deposition method, when the width of the flexible substrate is bmm and the thickness is tmm, ¥13.5 x 10^-^8b/ A rolled vapor-deposited product is created with a winding tension of ¥13.5 x 10^-^8b/tkg weight or less to accelerate oxidation. A method for manufacturing a magnetic recording medium, characterized by storing it in an atmosphere.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25284886A JPS63106925A (en) | 1986-10-24 | 1986-10-24 | Production of magnetic recording medium |
US07/110,820 US4885189A (en) | 1986-10-21 | 1987-10-21 | Method of producing magnetic recording media |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25284886A JPS63106925A (en) | 1986-10-24 | 1986-10-24 | Production of magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63106925A true JPS63106925A (en) | 1988-05-12 |
JPH0522293B2 JPH0522293B2 (en) | 1993-03-29 |
Family
ID=17243019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25284886A Granted JPS63106925A (en) | 1986-10-21 | 1986-10-24 | Production of magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63106925A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7175003B2 (en) | 2002-11-19 | 2007-02-13 | Honda Motor Co., Ltd. | Disk brake device for vehicle |
-
1986
- 1986-10-24 JP JP25284886A patent/JPS63106925A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7175003B2 (en) | 2002-11-19 | 2007-02-13 | Honda Motor Co., Ltd. | Disk brake device for vehicle |
Also Published As
Publication number | Publication date |
---|---|
JPH0522293B2 (en) | 1993-03-29 |
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