JPH01137429A - Production of magnetic recording medium - Google Patents
Production of magnetic recording mediumInfo
- Publication number
- JPH01137429A JPH01137429A JP29398587A JP29398587A JPH01137429A JP H01137429 A JPH01137429 A JP H01137429A JP 29398587 A JP29398587 A JP 29398587A JP 29398587 A JP29398587 A JP 29398587A JP H01137429 A JPH01137429 A JP H01137429A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic film
- recording medium
- plating
- electroless
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000007747 plating Methods 0.000 claims abstract description 15
- 229910018104 Ni-P Inorganic materials 0.000 claims abstract description 9
- 229910018536 Ni—P Inorganic materials 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- VRGNUPCISFMPEM-ZVGUSBNCSA-L zinc;(2r,3r)-2,3-dihydroxybutanedioate Chemical compound [Zn+2].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O VRGNUPCISFMPEM-ZVGUSBNCSA-L 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 229910000531 Co alloy Inorganic materials 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000007772 electroless plating Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000005498 polishing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000006174 pH buffer Substances 0.000 description 1
- 238000001556 precipitation Methods 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
- Magnetic Record Carriers (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.
以下余白
〔従来の技術〕
従来、ハードディスクの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。Margins below [Prior Art] Conventionally, an electroless Ni--P plating solution has been used to directly form an underlayer for the magnetic film of a hard disk.
主成分として錯化剤、 Ｎｉ塩、 ｐＨ緩衝剤、還
元剤、安定剤が含まれている。The main ingredients include a complexing agent, Ni salt, pH buffer, reducing agent, and stabilizer.
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０．１μｍ〜１５μｍのＮｉ−Ｐ
皮膜を形成してから、ｒａ磁性膜付与してきた。しかし
、このよう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Ｃ：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Ｃ二よりさらＣ；その上部Ｃ；
付与する磁性膜ではより大きな欠陥として現われる。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。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 performing Ni-P intermediate layer plating, the surface is re-polished, and a 0.1 μm to 15 μm Ni-P layer is further applied on top.
After forming the film, an RA magnetic film was applied. However, in such conventional methods, defects and polishing marks that remain even after re-polishing cause plating to be missing or abnormally deposited, and the effects of these defects are even greater than the upper part of the polishing marks.
They appear as larger defects in the applied magnetic film. 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ような問題点を解決しようと
するもので、＠性膜の欠陥を減′少し記録−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 of the conventional ones, and provides a method for manufacturing a magnetic recording medium that can reduce defects in the magnetic film and greatly reduce the number of errors during recording and reproduction. It is.
本発明によると、アルミニウム基板上に中間層として無
電解Ｎｉ−Ｐ合金層を有し、さらにその上部に磁性膜で
ある無電解００合金属を形成させて製造する磁性記録媒
体の製造方法Ｃ：おいて、中間層のＮｉ−Ｐ合金層の研
磨面上に、酒石酸亜鉛を添加した無電解Ｎｉめっき液に
より磁性膜の直接下地層を付与する事を特徴とする磁気
記録媒体の製造方法が得られる。According to the present invention, a method C for producing a magnetic recording medium is produced by having an electroless Ni-P alloy layer as an intermediate layer on an aluminum substrate, and further forming an electroless 00 alloy as a magnetic film on top of the electroless Ni-P alloy layer: There is provided a method for producing a magnetic recording medium, characterized in that an underlayer for a magnetic film is directly applied on the polished surface of an intermediate Ni-P alloy layer using an electroless Ni plating solution containing zinc tartrate. It will be done.
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１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〜α５μｍのＮｉ−Ｚｎ−Ｐめっきを実施した。Next, embodiments of the present invention will be described and explained. 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, Table 1-
Ni-Zn-P plating with a thickness of 0.1 to α5 μm was performed as a direct underlayer of the magnetic film using a plating solution having a bath composition of No. 1.
表−１液 組 成
めっき条件 液ｐＨ： ４．５±α５液温；８５℃
さらにその上部に、無電解めっき法によりｃｏ−ｐｍ性
膜を０．１μｍ形成させる。さらにその上部（：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
ところ、酒石酸亜鉛を添加したＮｉめっき液を用いて作
製した媒体は。Table 1 Liquid Composition Plating Conditions Liquid pH: 4.5±α5 Liquid Temperature: 85°C Furthermore, a 0.1 μm co-pm film is formed on top of the liquid by electroless plating. Furthermore, after forming a protective film on the upper part of the magnetic recording medium, recording and reproducing were performed as a magnetic recording medium.
添加しないものに比べてエラー発生個数が著しく減少し
た。表−２Ｃ：その結果を示す。The number of errors occurred was significantly reduced compared to the one without the addition. Table-2C: 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、５１１性膜の直接の下地
層を酒石酸亜鉛を添加したＮｉめっき液をｍｍいて形成
させることにより、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 [Effects of the Invention] As explained above, the present invention has the advantage of forming the direct underlayer of the 511 magnetic film by applying a Ni plating solution containing zinc tartrate to form the magnetic film above it. The number of defects was significantly reduced, and the number of errors during recording and reproduction was significantly reduced.
Claims (1)
合金層を有し、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、酒石酸亜鉛
を添加した無電解Ｎｉめっき液により磁性膜の直接下地
層を付与する事を特徴とする磁気記録媒体の製造方法。1. Electroless Ni-P as an intermediate layer on an aluminum substrate
In a method for producing a magnetic recording medium having an alloy layer and forming an electroless Co alloy layer as a magnetic film on top of the alloy layer, zinc tartrate is added onto the polished surface of the intermediate Ni-P alloy layer. A method for manufacturing a magnetic recording medium, characterized in that an underlayer of a magnetic film is directly applied using an electroless Ni plating solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29398587A JPH01137429A (en) | 1987-11-24 | 1987-11-24 | Production of magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29398587A JPH01137429A (en) | 1987-11-24 | 1987-11-24 | Production of magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01137429A true JPH01137429A (en) | 1989-05-30 |
Family
ID=17801757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29398587A Pending JPH01137429A (en) | 1987-11-24 | 1987-11-24 | Production of magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01137429A (en) |
-
1987
- 1987-11-24 JP JP29398587A patent/JPH01137429A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0448859B2 (en) | ||
| US4560624A (en) | Magnetic recording media with a dual protective coating of silicon monoxide and chromium | |
| JP2001167430A (en) | Substrate for magnetic disk and its manufacturing method | |
| JPH02105330A (en) | Production of magnetic recording medium | |
| JPS6254053A (en) | Aluminum alloy for magnetic disk excellent in plating suitability and contact strength of plating layer and minimal plating defects | |
| JPS6327420B2 (en) | ||
| JPS59215474A (en) | Electroless plating bath | |
| JPH0159359B2 (en) | ||
| JP2884598B2 (en) | Surface treatment method for magnetic disk substrate | |
| JPS62117143A (en) | Production of magnetic recording medium | |
| JP3940448B2 (en) | Magnetic disk substrate and manufacturing method thereof | |
| JPS61175920A (en) | Magnetic disk substrate | |
| JPH11140577A (en) | Aluminum alloy substrate for magnetic disk | |
| JPS59110796A (en) | Manufacture of magnetic disk substrate | |
| JPH0310085A (en) | Surface treatment for substrate | |
| JPS62230948A (en) | Aluminum alloy for magnetic disk | |
| JPS6187221A (en) | Method for manufacturing magnetic recording material | |
| JPS6247450A (en) | Aluminum alloy for magnetic disk combining superior plating suitability with minimized plating defects | |
| JPS6273426A (en) | Production of magnetic recording medium | |
| JPS61179842A (en) | Aluminum alloy for magnetic disc superior in plating property | |
| JP2001006161A (en) | Manufacture for glass substrate for information- recording medium | |
| JPS5857624A (en) | Magnetic recording medium | |
| JPS6154066A (en) | Sliding parts | |
| JPS63121125A (en) | Production of aluminum substrate for magnetic disk | |
| JPH0620270A (en) | Method for manufacturing aluminum substrate for magnetic disk |