JPH02105330A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPH02105330A JPH02105330A JP25873688A JP25873688A JPH02105330A JP H02105330 A JPH02105330 A JP H02105330A JP 25873688 A JP25873688 A JP 25873688A JP 25873688 A JP25873688 A JP 25873688A JP H02105330 A JPH02105330 A JP H02105330A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- electroless
- recording medium
- magnetic
- magnetic recording
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000007747 plating Methods 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 239000000758 substrate Substances 0.000 claims abstract description 5
- 229910000531 Co alloy Inorganic materials 0.000 claims abstract 2
- 229910018104 Ni-P Inorganic materials 0.000 claims description 7
- 229910018536 Ni—P Inorganic materials 0.000 claims description 7
- TVDSBUOJIPERQY-UHFFFAOYSA-N prop-2-yn-1-ol Chemical compound OCC#C TVDSBUOJIPERQY-UHFFFAOYSA-N 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000011241 protective layer Substances 0.000 abstract 1
- 229910001096 P alloy Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
Landscapes
- Chemically Coating (AREA)
- 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、特に無電解め
っき法により欠陥の少ない磁性膜を形成させる磁気記録
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 magnetic recording medium in which a magnetic film with fewer defects is formed by electroless plating.
従来、ハードディスク磁性膜の直接の下地層形成には無
電解Ｎｉ−Ｐめっき液が用いられ、主成分として錯化剤
、Ｎｉ塩、ＰＨ緩衝剤、還元剤。Conventionally, an electroless Ni--P plating solution has been used to directly form the underlayer of a hard disk magnetic film, and its main components are a complexing agent, Ni salt, a PH buffer, and a reducing agent.
安定剤が含まれている。Contains stabilizers.
上述した従来のＮｉ−Ｐめっき液により形成した皮膜で
は共析したＰの偏析や異常析出現象により欠陥が生じや
すい。このため、アルミニウム基板上に１０〜２０μｍ
のＮｉ−Ｐ中間層めっきを行った後、その表面を再研磨
し、さらにその上部に０．１０ μｍ〜０．１５ ｐｍ
のＮｉ−Ｐ皮膜を形成してから、磁性膜を付与してきた
。しかし、この様な従来の方法においては、再研磨後も
残存する欠陥部や研磨目において、めっきの欠落や、異
常析出をおこし、この欠陥の影響によりさらにその上部
に付与する磁性膜ではより大きな欠陥として現われる。In films formed using the conventional Ni--P plating solution described above, defects are likely to occur due to segregation or abnormal precipitation of eutectoid P. For this reason, 10 to 20 μm thick
After plating the Ni-P intermediate layer, the surface is re-polished, and a 0.10 μm to 0.15 pm layer is applied on top.
After forming a Ni--P film, a magnetic film was applied. However, in such conventional methods, plating may be missing or abnormally precipitated in the defective areas and polishing marks that remain even after repolishing, and due to the effects of these defects, the magnetic film applied on top of these defects will have a larger It appears as a defect.
この磁性膜の欠陥は、磁気記録−再生時の信号エラーに
つながるという問題点がある。There is a problem in that defects in the magnetic film lead to signal errors during magnetic recording and reproduction.
本発明は従来のもののこの様な問題点を解決しようとす
るもので磁性膜の欠陥を減少させ、記録再生時のエラー
数を大幅に減少できる磁気記録媒体の製造方法を提供す
るものである。The present invention is an attempt to solve these problems with the conventional methods, and provides a method of manufacturing a magnetic recording medium that can reduce defects in the magnetic film and greatly reduce the number of errors during recording and reproduction.
本発明によると、アルミ基板上に中間層として無電解Ｎ
ｉ−Ｐ合金層を有し、さらにその上部に磁性膜である無
電解Ｃｏ−Ｐ合金層を形成させて製造する磁気記録媒体
の製造方法において中間層のＮｉ−Ｐ合金層の研磨面上
に、プロパギルアルコールを添加した無電解Ｎｉめっき
液により磁性層を形成し、さらにその上部に磁性膜を特
徴とした磁気記録媒体の製造方法が得られる。According to the present invention, electroless N is formed as an intermediate layer on an aluminum substrate.
In a method for producing a magnetic recording medium that has an i-P alloy layer and further forms an electroless Co-P alloy layer as a magnetic film on top of the i-P alloy layer, on the polished surface of the intermediate Ni-P alloy layer. , a method for producing a magnetic recording medium characterized in that a magnetic layer is formed using an electroless Ni plating solution to which propargyl alcohol is added, and a magnetic film is further provided on top of the magnetic layer.
次に、本発明の実施例について説明する。加工されたア
ルミニウム基板上に、中間層としてＮｉ−Ｐめっきを１
０〜２０μｍ形成させる。その表面を研磨した後、表−
１の浴組成のめっき液により磁性膜の直接下地層として
０，１〜０．５μｍのＮｉ−Ｐのめっきを実施した。Next, examples of the present invention will be described. Ni-P plating is applied as an intermediate layer on the processed aluminum substrate.
A thickness of 0 to 20 μm is formed. After polishing the surface, the table-
Ni-P plating with a thickness of 0.1 to 0.5 μm was performed as a direct underlayer of the magnetic film using a plating solution having a bath composition of No. 1.
液温 ８５℃ さらにその上部に、無電解めっき法によりＣ。Liquid temperature 85℃ Furthermore, C was applied on top of it by electroless plating.
Ｐ磁性膜を０．１μｍ形成させる。A P magnetic film is formed to a thickness of 0.1 μm.
さらにその上部に保護膜を形成した後、磁気記録媒体と
して記録−再生を行った結果、プロパギルアルコールを
添加したＮｉめっき液を用いて作製した媒体は、添加し
ないものに比べてエラー発生個数が減少した。表−２に
その結果を示す。Furthermore, after forming a protective film on top of the Ni plating solution, we performed recording and reproducing as a magnetic recording medium.As a result, the number of errors occurred in the media prepared using the Ni plating solution to which propargyl alcohol was added, compared to the one without the addition of propargyl alcohol. Diminished. Table 2 shows the results.
表−２発生エラー個数
〔発明の効果〕
以上説明したように本発明は、磁性膜の直接下地層をプ
ロパギルアルコールを添加したＮｉめっき液により形成
させることで、その上部の磁性膜の欠陥は著しく減少し
、記録−再生時のエラー数を大幅に減少させることがで
きた。Table 2 Number of Errors Occurred [Effects of the Invention] As explained above, in the present invention, by forming the direct underlayer of the magnetic film using a Ni plating solution containing propargyl alcohol, defects in the upper magnetic film can be eliminated. It was possible to significantly reduce the number of errors during recording and reproduction.
代理人 弁理士 内 原 晋Agent: Patent Attorney Susumu Uchihara
Claims (1)
層を有し、その上部に磁性膜である無電解Ｃｏ合金層を
形成させて製造する磁気記録媒体の製造方法において、
中間層のＮｉ−Ｐ合金層の研磨面上に、プロパギルアル
コールを添加した無電解Ｎｉめっき液により下地層を形
成し、その上部に磁性層を形成することを特徴とする磁
気記録媒体の製造方法。In a method of manufacturing a magnetic recording medium, the method comprises manufacturing an electroless Ni-P alloy layer as an intermediate layer on an aluminum substrate, and forming an electroless Co alloy layer as a magnetic film on top of the electroless Ni-P alloy layer,
Manufacture of a magnetic recording medium characterized by forming an underlayer using an electroless Ni plating solution containing propargyl alcohol on the polished surface of an intermediate Ni-P alloy layer, and forming a magnetic layer on top of the underlayer. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25873688A JP2794725B2 (en) | 1988-10-13 | 1988-10-13 | Manufacturing method of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25873688A JP2794725B2 (en) | 1988-10-13 | 1988-10-13 | Manufacturing method of magnetic recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02105330A true JPH02105330A (en) | 1990-04-17 |
| JP2794725B2 JP2794725B2 (en) | 1998-09-10 |
Family
ID=17324370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25873688A Expired - Lifetime JP2794725B2 (en) | 1988-10-13 | 1988-10-13 | Manufacturing method of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2794725B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338260C (en) * | 2004-05-14 | 2007-09-19 | 深圳市成功科技有限公司 | Composite nickel plating method for aluminum alloy heating piece |
-
1988
- 1988-10-13 JP JP25873688A patent/JP2794725B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338260C (en) * | 2004-05-14 | 2007-09-19 | 深圳市成功科技有限公司 | Composite nickel plating method for aluminum alloy heating piece |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2794725B2 (en) | 1998-09-10 |
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