JPS62229521A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS62229521A JPS62229521A JP7164886A JP7164886A JPS62229521A JP S62229521 A JPS62229521 A JP S62229521A JP 7164886 A JP7164886 A JP 7164886A JP 7164886 A JP7164886 A JP 7164886A JP S62229521 A JPS62229521 A JP S62229521A
- Authority
- JP
- Japan
- Prior art keywords
- film
- oxide
- protective film
- recording medium
- magnetic
- 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 32
- 229910002058 ternary alloy Inorganic materials 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000010408 film Substances 0.000 claims 11
- 239000007864 aqueous solution Substances 0.000 claims 1
- 239000010409 thin film Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000007772 electroless plating Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 4
- 229910018104 Ni-P Inorganic materials 0.000 description 3
- 229910018536 Ni—P Inorganic materials 0.000 description 3
- 239000011572 manganese Substances 0.000 description 2
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 2
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、生産性の向上を図るようにした磁気記録媒
体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording medium designed to improve productivity.
８ｇ２図は、例えば特開昭６０−８５４８２号公報に示
された従来の磁気記録媒体を示すもので、（１１は磁気
記録媒体の基体、（２）は基体＋１１に設けられた非磁
性膜、（３１は非磁性膜（２）の上に設けられた磁性膜
、（４１は磁性膜（３１の上に設けられた保護膜である
・
このような磁気記録媒体は、例えばディスク状のアルミ
ニウム板からなる基体ｔｉｔ上に、Ｎｉ−Ｐからなる非
磁性膜（２）を設け、さらＶＣ＃磁性膜（２）の上に設
けたｃｏ−ｐからなる磁性膜（３１を保護するために、
磁性膜（３）の表面をクロム酸を含有する溶液にＩＰ
Ｈすることによって表面改質層を形成し、保護膜（４）
としている。Figure 8g2 shows a conventional magnetic recording medium disclosed in, for example, Japanese Patent Application Laid-Open No. 60-85482 (11 is the base of the magnetic recording medium, (2) is a non-magnetic film provided on the base +11, (31 is a magnetic film provided on the non-magnetic film (2), (41 is a magnetic film (protective film provided on 31)) Such a magnetic recording medium is, for example, a disk-shaped aluminum plate. A non-magnetic film (2) made of Ni-P is provided on a substrate tit made of VC#.
IP the surface of the magnetic film (3) in a solution containing chromic acid.
A surface modified layer is formed by H, and a protective film (4) is formed.
It is said that
従来の磁気記録媒体は以上のように構成されているので
、Ｃｏｉ含む磁性膜を酸化処理するとき、ＣＯが著しく
腐食される。このため、ピットエラーを生じ易い。即ち
、歩留りが悪く、生産性の向上が困難であるという問題
点があった。Since conventional magnetic recording media are constructed as described above, when a magnetic film containing Coi is oxidized, CO is significantly corroded. Therefore, pit errors are likely to occur. That is, there were problems in that the yield was poor and it was difficult to improve productivity.
この発明は、上記のような問題点を解消するためになさ
れたもので、ピットエラーの発生を防止することにより
、生産性の向上を図るようにした磁気記録媒体を得るこ
とを目的とする。The present invention has been made to solve the above-mentioned problems, and aims to provide a magnetic recording medium that can improve productivity by preventing the occurrence of pit errors.
この発明に係る磁気記録媒体は、磁性膜の上にＮｉ−Ｗ
−Ｂの三元合金からなる第１の保護膜を設け、この％ｌ
の保護膜の上にＣｒ酸化物、Ｃｒ水酸化物、マンガン酸
化物、リン酸化物からなる第２の保護膜を設けたもので
ある。The magnetic recording medium according to the present invention has Ni-W on the magnetic film.
- A first protective film made of a ternary alloy of B is provided, and this %l
A second protective film made of Cr oxide, Cr hydroxide, manganese oxide, and phosphorus oxide is provided on the protective film.
この発明に係る磁気記録媒体は磁性膜の上にＮｉ−Ｗ−
Ｂの三元合金からなる％１の保護膜を設けるので、ＣＯ
の・宵食を防止する。The magnetic recording medium according to the present invention has Ni-W-
Since a protective film of %1 made of a ternary alloy of B is provided, CO
・Prevent late night eating.
以下、この発明の一医施例ｒ図について説明する。第１
図において、（１）〜（３１は従来のものと同様である
。（６）は磁性膜（３１の上に設けられたＮｉ− Ｗ−
Ｂの三元合金からなる第１の保護膜、（６）は第ｌの保
護膜（５）の上に設けられたａｒｐ化物、Ｃｒ水酸化物
、マンガン酸化物、リン酸化物からなる第２の保護膜で
ある。Hereinafter, a medical practice embodiment of the present invention will be described. 1st
In the figure, (1) to (31) are the same as the conventional one. (6) is the magnetic film (Ni-W- provided on the magnetic film (31)
The first protective film (6) is made of a ternary alloy of B, and the second protective film (6) is made of an arp oxide, a Cr hydroxide, a manganese oxide, and a phosphorus oxide, which is provided on the first protective film (5). It is a protective film.
つぎに、この発明の一実施例による磁気記録媒体の製造
方法について説明する。Next, a method for manufacturing a magnetic recording medium according to an embodiment of the present invention will be described.
第１図において、所定のアルミ合金板：と円板状に形成
した基体＋１１の表面を平担かつ平滑に仕上げ、この基
体（１）の表面にめっき手法により厚さがほぼ２５μｍ
となるようにＮｉ−Ｐ合金の非磁性膜（２）を形成し、
この非磁性膜（２）の上に所定の手段で厚膜がほぼ０．
６μｍのＣｏ−Ｐからなる磁性膜（３）を形成して磁気
配膳とした。この磁性膜（３１は保持力ａｏｏ ｏθ、
残留磁束密度９００ｙａｕｓｓの磁気特性を有する。つ
ぎに、磁性膜（３）の上に無電解めっき手法によって、
Ｎｉ−Ｗ−Ｂの三元合金からなる第ｌの保護膜（５）を
形成し、この第１の保護膜（５）の上に下表に示す溶液
への浸漬条件で得られたＣｒ酸化物、Ｃｒ水酸化物、Ｍ
ｎ酸化物、Ｐ酸化物からなる化成被膜を形成して第２の
保護膜ｆｏｌとした◎
以上のように構成した磁気記録媒体５０枚について情報
の記録及び再生試験を実施して、磁性膜の特性を調査し
た。これによるとピットエラーは６個以下となった。In Fig. 1, the surface of a predetermined aluminum alloy plate (1) is flattened and smoothed, and the surface of this substrate (1) is plated to a thickness of approximately 25 μm.
A nonmagnetic film (2) of Ni-P alloy is formed so that
A thick film of approximately 0.0 mm is coated on this non-magnetic film (2) by a predetermined method.
A magnetic film (3) made of Co-P with a thickness of 6 μm was formed to provide a magnetic arrangement. This magnetic film (31 is the coercive force aoo oθ,
It has magnetic properties with a residual magnetic flux density of 900 yauss. Next, by electroless plating method on the magnetic film (3),
A first protective film (5) made of a ternary alloy of Ni-W-B is formed, and on this first protective film (5) Cr oxidation obtained under the immersion conditions in the solution shown in the table below is applied. substance, Cr hydroxide, M
A chemical conversion film consisting of n oxide and p oxide was formed to serve as the second protective film fol ◎ Information recording and reproducing tests were conducted on 50 magnetic recording media constructed as described above, and the magnetic film was The characteristics were investigated. According to this, there were less than six pit errors.
上記実施例においては、第１の保護膜をＮｉ−Ｗ−Ｂの
三元合金としたが、Ｎｉ−Ｗ−Ｐ、Ｎｉ−Ｐ又はＮｉ−
Ｂ等で第１の保護膜を形成しても、上記実施例と同様の
動作を期待できる。また、第２の保護膜は、Ｃｒ酸化物
、Ｍｎ酸化物、又はＰ酸化物で夫々単独に化成被膜を形
成しても上記実施例と同様の効果を期待できる。In the above embodiment, the first protective film was made of a ternary alloy of Ni-W-B, but Ni-W-P, Ni-P or Ni-
Even if the first protective film is formed using B or the like, the same operation as in the above embodiment can be expected. Further, even if the second protective film is formed by forming a chemical conversion film of Cr oxide, Mn oxide, or P oxide, the same effect as in the above embodiment can be expected.
以上のようにこの発明によれば、磁性膜の上にＮｉ−Ｗ
−Ｂの三元金属からなる’４１の保護膜を設け、この第
１の保護膜の上にＣ！ｒ、Ｍｎ、Ｐの酸化物、水酸化物
からなる化成被膜を第２の保護膜としたので、磁性膜の
腐食を防止することができる。これによってピット誤り
の発生を減少し、信頓性すなわち生産性を向上できる効
果が得られる。As described above, according to the present invention, Ni-W is placed on the magnetic film.
A '41 protective film made of a ternary metal of -B is provided, and on top of this first protective film, C! Since the second protective film is a chemical conversion film made of oxides and hydroxides of r, Mn, and P, corrosion of the magnetic film can be prevented. This has the effect of reducing the occurrence of pit errors and improving reliability, that is, productivity.
第１図はこの発明の一実施例による磁気記録媒体の部分
断面図、第２図は従来の磁気記録媒体の部分断面図であ
る。図において、■は基体、（２）は非磁性膜、（３）
は磁性膜、（５）は第１の保護膜、（６）は第２の保護
膜である０
なお各図中同一符号は同−又は相当部分を示す。FIG. 1 is a partial sectional view of a magnetic recording medium according to an embodiment of the present invention, and FIG. 2 is a partial sectional view of a conventional magnetic recording medium. In the figure, ■ is the base, (2) is the nonmagnetic film, (3)
is a magnetic film, (5) is a first protective film, and (6) is a second protective film. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (2)
性膜の上に保護膜を設けたものにおいて、磁性膜の上に
Ｎｉ−Ｗ−Ｂの三元合金からなる第１の保護膜を設け、
この第１の保護膜の上にＣｒ酸化物、Ｍｎ酸化物、Ｐ酸
化物からなる第２の保護膜を設けたことを特徴とする磁
気記録媒体。(1) A substrate is covered with a non-magnetic film, a magnetic film is provided on top of the magnetic film, and a protective film is provided on the magnetic film. Provide a protective film,
A magnetic recording medium characterized in that a second protective film made of Cr oxide, Mn oxide, and P oxide is provided on the first protective film.
Ｗ−Ｂの三元合金薄膜で、第２の保護膜はＣｒ、Ｍｎ、
Ｐ又はＣｒ、Ｍｎ、Ｐの何れかの水溶液に浸漬して形成
された化成被膜であることを特徴とする特許請求の範囲
第１項記載の磁気記録媒体。(2) The first protective film is Ni-
The second protective film is a W-B ternary alloy thin film of Cr, Mn,
2. The magnetic recording medium according to claim 1, wherein the magnetic recording medium is a chemical conversion film formed by immersion in an aqueous solution of P, Cr, Mn, or P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7164886A JPS62229521A (en) | 1986-03-28 | 1986-03-28 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7164886A JPS62229521A (en) | 1986-03-28 | 1986-03-28 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62229521A true JPS62229521A (en) | 1987-10-08 |
Family
ID=13466651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7164886A Pending JPS62229521A (en) | 1986-03-28 | 1986-03-28 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62229521A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009041398A1 (en) * | 2007-09-25 | 2009-04-02 | Sanyo Special Steel Co., Ltd. | Ni-w-b sputtering target member for producing intermediate layer film of perpendicular magnetic recording medium, and thin film produced by using the same |
-
1986
- 1986-03-28 JP JP7164886A patent/JPS62229521A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009041398A1 (en) * | 2007-09-25 | 2009-04-02 | Sanyo Special Steel Co., Ltd. | Ni-w-b sputtering target member for producing intermediate layer film of perpendicular magnetic recording medium, and thin film produced by using the same |
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