JPH05159272A - Magnetic disk medium - Google Patents
Magnetic disk mediumInfo
- Publication number
- JPH05159272A JPH05159272A JP34191091A JP34191091A JPH05159272A JP H05159272 A JPH05159272 A JP H05159272A JP 34191091 A JP34191091 A JP 34191091A JP 34191091 A JP34191091 A JP 34191091A JP H05159272 A JPH05159272 A JP H05159272A
- Authority
- JP
- Japan
- Prior art keywords
- film
- alloy
- magnetic
- magnetic disk
- protective 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.)
- Pending
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 26
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 13
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 13
- 230000001590 oxidative effect Effects 0.000 claims abstract description 7
- 230000003647 oxidation Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 229910000979 O alloy Inorganic materials 0.000 claims description 7
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 4
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 3
- -1 wherein C 0 Inorganic materials 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 15
- 230000007797 corrosion Effects 0.000 abstract description 15
- 239000000758 substrate Substances 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000002161 passivation Methods 0.000 abstract description 2
- 229910000531 Co alloy Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 1
- 230000033116 oxidation-reduction process Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 54
- 239000010410 layer Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は磁気ディスク装置で使用
される磁気ディスク媒体の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a magnetic disk medium used in a magnetic disk device.
【０００２】[0002]
【従来の技術】従来、固体磁気ディスク装置で使用され
る磁気ディスク媒体（以下「媒体」という）は基板の表
面上に塗布法鍍金法またはスパッタ法で形成した磁性体
層および保護層の磨耗を防止するために磁性体層または
保護層の上に耐磨耗性の潤滑剤の薄膜層を形成してい
る。上記媒体の耐蝕性を改善するために、磁性膜組成ま
たは保護膜組成の改良が数多くなされてきたが、後処理
による耐蝕性の改善はほとんど見られない。2. Description of the Related Art Conventionally, a magnetic disk medium (hereinafter referred to as "medium") used in a solid-state magnetic disk device has a magnetic material layer and a protective layer formed on a surface of a substrate by a coating method, a plating method, or a sputtering method. To prevent this, a thin film layer of a wear-resistant lubricant is formed on the magnetic layer or the protective layer. In order to improve the corrosion resistance of the above-mentioned medium, many improvements have been made to the magnetic film composition or the protective film composition, but almost no improvement in the corrosion resistance due to the post-treatment is observed.
【０００３】[0003]
【発明が解決しようとする課題】従来の媒体は耐蝕性に
不十分な面が存在し、６０°Ｃにも及ぶ磁気ディスクド
ライブ内の過酷な条件で長時間使用すると、腐食を生ず
る場合がある。腐食の発生はリードライトエラーの発生
源となるに留まらず最悪の場合、ヘッドクラッシュを引
き起こす原因となるため深刻な問題となっている。本発
明の目的は腐食の発生しにくい構造の磁気ディスク媒体
を提供することにある。The conventional medium has a surface having insufficient corrosion resistance, and it may cause corrosion when used for a long time under severe conditions in a magnetic disk drive as high as 60 ° C. . Corrosion is not only a source of read / write errors, but in the worst case, it causes a head crash, which is a serious problem. An object of the present invention is to provide a magnetic disk medium having a structure in which corrosion is unlikely to occur.
【０００４】[0004]
【課題を解決するための手段】前記目的を達成するため
に本発明による磁気ディスク媒体は磁気ディスク装置で
使用され、Ｃ0 合金またはＮｉ合金またはＦｅ合金で形
成された磁性膜を有する磁気ディスク媒体において、磁
性膜表面の酸化処理により得られるＣ0 またはＮｉまた
はＦｅの酸化膜を有する磁性膜を備えて構成されてい
る。また、磁気ディスク装置で使用され、ＣｒまたはＣ
ｒ合金またはＮｉ合金で形成された保護膜を有する磁気
ディスク媒体において、保護膜表面の酸化処理により得
られるＣｒまたはＮｉの酸化膜を有する保護膜を備えて
構成されている。さらに、磁気ディスク装置で使用さ
れ、Ｃ0 合金またはＮｉ合金またはＦｅ合金で形成され
た磁性膜と、ＣｒまたはＣｒ合金またはＮｉ合金で形成
された保護膜を有する磁気ディスク媒体において、磁性
膜表面の酸化処理により得られるＣ0 またはＮｉまたは
Ｆｅの酸化膜を有する磁性膜と、保護膜表面の酸化処理
により得られるＣｒまたはＮｉの酸化膜を有する保護膜
を備えて構成されている。In order to achieve the above object, a magnetic disk medium according to the present invention is used in a magnetic disk device and has a magnetic film formed of a C 0 alloy, a Ni alloy or a Fe alloy. In the above, a magnetic film having an oxide film of C 0, Ni, or Fe obtained by oxidizing the surface of the magnetic film is provided. Also used in magnetic disk devices, Cr or C
A magnetic disk medium having a protective film formed of an r alloy or a Ni alloy is provided with a protective film having a Cr or Ni oxide film obtained by oxidizing the surface of the protective film. Further, in a magnetic disk medium used in a magnetic disk device and having a magnetic film formed of a C 0 alloy, a Ni alloy or a Fe alloy and a protective film formed of Cr, a Cr alloy or a Ni alloy, It comprises a magnetic film having a C 0 or Ni or Fe oxide film obtained by oxidation treatment and a protective film having a Cr or Ni oxide film obtained by oxidation treatment on the surface of the protective film.
【０００５】[0005]
【実施例】以下、図面を参照して本発明をさらに詳しく
説明する。図１は本発明による磁気ディスク媒体の第１
の実施例を示す断面図である。この実施例の媒体はＡｌ
基板１，下地層２，Ｃ0 合金磁性膜３，Ｃ0 酸化膜Ａ，
保護膜４および潤滑膜５より構成されている。この媒体
は外部から侵入する酸化性物質およびＣ0 酸化膜Ａより
表面側の各層の界面に残留している酸化性物質からのア
タックをＣ0 酸化膜Ａが防ぎ、Ｃ0 合金磁性膜３を腐食
から保護する。また、保護膜４によりＣ0 より貴な酸化
還元電位を持つ金属が含まれる場合、Ｃ0 合金磁性膜３
と保護膜４の界面で発生する局部電池形成によるＣ0 の
腐食もＣ0 酸化膜Ａの存在下では発生しないため、耐蝕
性に優れる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 shows a first magnetic disk medium according to the present invention.
It is sectional drawing which shows the Example of. The medium of this example is Al
Substrate 1, Underlayer 2, C 0 alloy magnetic film 3, C 0 oxide film A,
It is composed of a protective film 4 and a lubricating film 5. This medium prevents attack from oxidizing substances remaining in the interface between the oxidizing agent and C 0 oxide film A from the surface layers penetrates from the outside C 0 oxide film A, the C 0 alloy magnetic film 3 Protect from corrosion. Also, if a metal having a redox potential Do nobler than C 0 contained by the protective film 4, C 0 alloy magnetic film 3
Corrosion of C 0 due to the formation of a local cell at the interface between the protective film 4 and the protective film 4 does not occur in the presence of the C 0 oxide film A, so that the corrosion resistance is excellent.
【０００６】図２は本発明の第２の実施例を示す断面図
である。この実施例の媒体はＡｌ基板１，下地層２，磁
性膜６，Ｎｉ合金保護膜７，Ｎｉ酸化膜Ｂおよび潤滑膜
５より構成されている。この媒体は実施例１で指摘した
ような酸化性物質からのアタックをＮｉ酸化膜Ｂが防止
し、Ｎｉ合金保護膜７および磁性膜６を腐食から保護す
る。また、実施例１のように磁性膜を変質させることが
ないため、電磁気特性を低下させずに耐蝕性を向上する
ことができる。FIG. 2 is a sectional view showing a second embodiment of the present invention. The medium of this embodiment is composed of an Al substrate 1, an underlayer 2, a magnetic film 6, a Ni alloy protective film 7, a Ni oxide film B and a lubricating film 5. In this medium, the Ni oxide film B prevents the attack from the oxidizing substance as pointed out in Example 1, and protects the Ni alloy protective film 7 and the magnetic film 6 from corrosion. Further, unlike the first embodiment, since the magnetic film is not altered, the corrosion resistance can be improved without deteriorating the electromagnetic characteristics.
【０００７】図は本発明の第３の実施例を示す断面図で
ある。この実施例の媒体はＡｌ基板１，下地層２，Ｃ0
合金磁性膜３，Ｃ0 酸化膜Ａ，Ｎｉ合金保護膜７，Ｎｉ
酸化膜Ｂおよび潤滑膜５より構成されている。この媒体
は酸化が２層であるので、上記２つの実施例以上の耐蝕
性を示す。The figure is a cross-sectional view showing a third embodiment of the present invention. The medium of this example is an Al substrate 1, an underlayer 2, and C 0.
Alloy magnetic film 3, C 0 oxide film A, Ni alloy protective film 7, Ni
It is composed of an oxide film B and a lubricating film 5. Since this medium has two layers of oxidation, it exhibits more corrosion resistance than the above two examples.
【０００８】[0008]
【発明の効果】以上，説明したように本発明による磁気
ディスク媒体はＣ0またはＮｉまたはＦｅの酸化膜を有
する磁性膜またはＣｒまたはＮｉの酸化膜を有する保護
膜を備えているので、Ｃ0 またはＮｉまたはＦｅまたは
Ｃｒの酸化膜の不動態化現象により優れた耐蝕性を示す
効果がある。Effect of the Invention above, the magnetic disk medium according to the present invention as described is provided with a protective film having an oxide film of the magnetic film or Cr or Ni having an oxide film of C 0 or Ni, or Fe, C 0 Alternatively, the passivation phenomenon of the oxide film of Ni, Fe, or Cr has the effect of exhibiting excellent corrosion resistance.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明による磁気ディスク媒体の第１の実施例
を示す断面図である。FIG. 1 is a sectional view showing a first embodiment of a magnetic disk medium according to the present invention.
【図２】本発明の第２の実施例を示す断面図である。FIG. 2 is a sectional view showing a second embodiment of the present invention.
【図３】本発明の第３の実施例を示す断面図である。FIG. 3 is a sectional view showing a third embodiment of the present invention.
【図４】従来の磁気ディスク媒体の断面図である。FIG. 4 is a sectional view of a conventional magnetic disk medium.
１…Ａｌ基板 ２…下地層 ３…Ｃ0 合金磁性膜 ４…保護膜 ５…潤滑膜 ６…磁性膜 ７…Ｎｉ合金磁性膜 Ａ…Ｃ0 酸化膜 Ｂ…Ｎｉ酸化膜DESCRIPTION OF SYMBOLS 1 ... Al substrate 2 ... Underlayer 3 ... C0 alloy magnetic film 4 ... Protective film 5 ... Lubrication film 6 ... Magnetic film 7 ... Ni alloy magnetic film A ... C0 oxide film B ... Ni oxide film
Claims (3)
またはＮｉ合金またはＦｅ合金で形成された磁性膜を有
する磁気ディスク媒体において、 磁性膜表面の酸化処理により得られるＣ0 またはＮｉま
たはＦｅの酸化膜を有する磁性膜を備えたことを特徴と
する磁気ディスク媒体。1. A magnetic disk medium used in a magnetic disk device and having a magnetic film formed of a C 0 alloy, a Ni alloy, or an Fe alloy, wherein C 0, Ni, or Fe obtained by an oxidation treatment of the surface of the magnetic film. A magnetic disk medium comprising a magnetic film having an oxide film.
はＣｒ合金またはＮｉ合金で形成された保護膜を有する
磁気ディスク媒体において、 保護膜表面の酸化処理により得られるＣｒまたはＮｉの
酸化膜を有する保護膜を備えたことを特徴とする磁気デ
ィスク媒体。2. A magnetic disk medium used in a magnetic disk device and having a protective film formed of Cr, a Cr alloy, or a Ni alloy, wherein the protective film has a Cr or Ni oxide film obtained by oxidizing the surface of the protective film. A magnetic disk medium comprising a film.
またはＮｉ合金またはＦｅ合金で形成された磁性膜と、
ＣｒまたはＣｒ合金またはＮｉ合金で形成された保護膜
を有する磁気ディスク媒体において、 磁性膜表面の酸化処理により得られるＣ0 またはＮｉま
たはＦｅの酸化膜を有する磁性膜と、 保護膜表面の酸化処理により得られるＣｒまたはＮｉの
酸化膜を有する保護膜を備えたことを特徴とする磁気デ
ィスク媒体。3. A magnetic film used in a magnetic disk device and formed of a C 0 alloy, a Ni alloy or a Fe alloy,
In a magnetic disk medium having a protective film formed of Cr, a Cr alloy, or a Ni alloy, a magnetic film having a C 0, Ni, or Fe oxide film obtained by oxidizing the surface of the magnetic film, and an oxidizing treatment of the surface of the protective film A magnetic disk medium comprising a protective film having a Cr or Ni oxide film obtained by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34191091A JPH05159272A (en) | 1991-11-29 | 1991-11-29 | Magnetic disk medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34191091A JPH05159272A (en) | 1991-11-29 | 1991-11-29 | Magnetic disk medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05159272A true JPH05159272A (en) | 1993-06-25 |
Family
ID=18349699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34191091A Pending JPH05159272A (en) | 1991-11-29 | 1991-11-29 | Magnetic disk medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05159272A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011003261A (en) * | 2009-06-22 | 2011-01-06 | Hitachi Ltd | Magnetic recording medium, method for manufacturing the same, and magnetic storage device |
| US8293387B2 (en) | 2007-12-27 | 2012-10-23 | Kabushiki Kaisha Toshiba | Magnetic recording medium and method of manufacturing the same |
-
1991
- 1991-11-29 JP JP34191091A patent/JPH05159272A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8293387B2 (en) | 2007-12-27 | 2012-10-23 | Kabushiki Kaisha Toshiba | Magnetic recording medium and method of manufacturing the same |
| US20130004661A1 (en) * | 2007-12-27 | 2013-01-03 | Kabushiki Kaisha Toshiba | Magnetic recording medium and method of manufacturing the same |
| JP2011003261A (en) * | 2009-06-22 | 2011-01-06 | Hitachi Ltd | Magnetic recording medium, method for manufacturing the same, and magnetic storage device |
| US8318332B2 (en) | 2009-06-22 | 2012-11-27 | Hitachi, Ltd. | Magnetic recording medium, method for fabricating the same, and magnetic storage device |
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