JPH05305570A - Abrasive member - Google Patents

Abrasive member

Info

Publication number
JPH05305570A
JPH05305570A JP31453392A JP31453392A JPH05305570A JP H05305570 A JPH05305570 A JP H05305570A JP 31453392 A JP31453392 A JP 31453392A JP 31453392 A JP31453392 A JP 31453392A JP H05305570 A JPH05305570 A JP H05305570A
Authority
JP
Japan
Prior art keywords
abrasive grain
polishing
abrasive
abrasive grains
magnetic disc
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
Application number
JP31453392A
Other languages
Japanese (ja)
Inventor
Yasushi Ito
康 伊東
Masaaki Imamura
昌明 今村
Yoshiki Kato
義喜 加藤
Jiyun Fumioka
順 文岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP31453392A priority Critical patent/JPH05305570A/en
Publication of JPH05305570A publication Critical patent/JPH05305570A/en
Pending legal-status Critical Current

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  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To polish projections on a magnetic disc surface with a high economic efficiency by forming an abrasive grain layer containing at least two kinds of abrasive grains different in hardness on a base member. CONSTITUTION:To grind projections on the surface of a magnetic disc with a high economic efficiency, polishing is conducted not with a necessary condition of chip pocket but by using a lapping tape having an abrasive grain layer having diamond abrasive grains 4 scattered in Al2O3 abrasive grain groups 3. To more precisely finish the surface without giving a working flaw on the surface, a lapping tape having chip pockets 2 in the abrasive grain layer 3 is used for polishing. Thus, projections on the magnetic disc surface can be polished with a high economic efficiency. Since the magnetic disc surface can be highly precisely worked, the float of a magnetic head can be reduced.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、研磨部材に関し、特に
磁気ディスク表面を経済的にかつ高精度に研磨が可能で
あり、しかも磁気ディスクに加工キズを付けずに突起を
経ることが可能な研磨部材に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing member, and in particular, it is possible to polish the surface of a magnetic disk economically and with high precision, and moreover, to allow the magnetic disk to pass through projections without being scratched. The present invention relates to a polishing member.

【0002】[0002]

【従来の技術】磁気ディスク媒体の高記録密度化に伴っ
て、磁気ヘッドの低浮上化が必要となり、そのために媒
体表面の高精度化が要求されている。媒体表面を高精度
で研磨するためには、表面を研磨テ−プで押圧しながら
移動させることによって行われる。磁気ディスク媒体の
製造方法において、ラッピングテ−プを使用する提案と
しては、ラッピングテ−プ面に予め潤滑剤を塗布し、約
30〜50℃で乾燥した後に研磨する方法(特開昭56
−130834号公報参照)、あるいは基板上にエポキ
シ樹脂、フェノ−ル樹脂、メラミン樹脂等の熱硬化性樹
脂をバインダ−とし、さらにアルミナ粉等の突起を備え
た磁性膜を有する磁気ディスクを移動させながら、フロ
ロカ−ボン等の潤滑剤を含浸させたラッピングテ−プを
張り付けた磁気ヘッドでラッピングを行う方法(特開昭
56−130836号公報参照)等がある。
2. Description of the Related Art With the increase in recording density of magnetic disk media, it is necessary to reduce the flying height of magnetic heads, which requires high accuracy of the surface of the media. In order to polish the surface of the medium with high precision, the surface of the medium is moved by pressing it with a polishing tape. As a proposal for using a lapping tape in a method for manufacturing a magnetic disk medium, a method in which a lubricant is applied to the surface of the lapping tape in advance, and the lapping tape is dried at about 30 to 50 ° C. and then polished (JP-A-56-56).
-130834) or a thermosetting resin such as an epoxy resin, a phenol resin, a melamine resin as a binder on a substrate, and further moving a magnetic disk having a magnetic film having protrusions such as alumina powder. However, there is also a method of lapping with a magnetic head having a lapping tape impregnated with a lubricant such as fluorocarbon (see JP-A-56-130836).

【0003】[0003]

【発明が解決しようとする課題】ところで、耐久強度補
強剤であるフィラ(φ0.5μm〜φ1.3μmのAl
23粒子)を混入した磁性媒体の表面を加工する場合、
従来のラッピングテ−プ(Al23,SiC等の砥粒を
使用したもの)では、媒体表面に突出したフィラの頭を
十分に削り切る能力がなく、磁気ヘッドの低浮上化の妨
げとなっている。フィラに対して高切削性を持つダイヤ
砥粒を使用したラッピングテ−プでは、砥粒率が低いと
加工キズの多い媒体表面となり、加工キズがでないよう
にチップポケットを構成するに足る砥粒率にするには、
高価になり過ぎてしまうため、製品には適用できないと
いう問題がある。本発明の目的は、磁気ディスク表面を
経済的な手段で高精度に研磨することが可能な研磨部材
を提供することにある。また、本発明の他の目的は、磁
気ディスク表面を研磨する場合に、加工キズを付けずに
突起を削ることが可能な研磨部材を提供することにあ
る。
By the way, a filler (φ0.5 μm to φ1.3 μm of Al, which is a durability reinforcing agent, is used.
When processing the surface of a magnetic medium containing 2 O 3 particles),
The conventional lapping tape (which uses abrasive grains such as Al 2 O 3 and SiC) does not have the ability to sufficiently cut off the head of the filler protruding to the medium surface, which hinders the magnetic head from lowering its flying height. Is becoming With a lapping tape that uses diamond abrasive grains that have high machinability against the filler, a medium surface with a large number of scratches will result if the abrasive grain ratio is low, and it is sufficient to form chip pockets without scratches. To rate
There is a problem that it cannot be applied to products because it becomes too expensive. An object of the present invention is to provide a polishing member capable of polishing the surface of a magnetic disk with high precision by an economical means. Another object of the present invention is to provide a polishing member capable of removing projections without causing scratches when polishing the surface of a magnetic disk.

【0004】[0004]

【課題を解決するための手段】上記目的を達成するた
め、本発明の研磨部材は、(イ)ベ−ス部材と、そのベ
−ス部材上に形成された硬度が異なる少なくとも2種類
の砥粒を含む砥粒層とを有することを特徴としている。
また、(ロ)砥粒は、ダイヤモンドとダイヤモンドより
も硬度の低い物質であることも特徴としている。また、
(ハ)ダイヤモンドよりも硬度の低い物質は、Al23
あるいはSiCであることも特徴としている。また、
(ニ)ベ−ス部材は、フィルムであることも特徴として
いる。また、(ホ)砥粒層には、砥粒相互間に凹みが形
成されていることも特徴としている。
In order to achieve the above object, the polishing member of the present invention comprises (a) a base member and at least two kinds of abrasives formed on the base member and having different hardnesses. And an abrasive grain layer containing grains.
In addition, (b) abrasive grains are also characterized by being a substance having a hardness lower than that of diamond. Also,
(C) A substance having a hardness lower than that of diamond is Al 2 O 3
Alternatively, it is characterized by being SiC. Also,
(D) The base member is also characterized by being a film. Further, (e) the abrasive grain layer is characterized in that recesses are formed between the abrasive grains.

【0005】[0005]

【作用】本発明において、磁気ディスクの表面の突起を
経済的に効率よく削るために、チップポケットは必要条
件ではなく、Al23砥粒群にダイヤモンド砥粒が点在
する砥粒層を有するラッピングテ−プを用いて研磨す
る。また、表面に加工キズを付けないで、さらに精度よ
く仕上げるために、砥粒層にチップポケットを設けたラ
ッピングテ−プを用いて研磨する。これにより、磁気デ
ィスクの表面の突起を経済的に効率よく研磨することが
できる。そして、磁気ディスク表面が高精度に加工でき
るので、磁気ヘッドの低浮上化が可能となる。
In the present invention, in order to economically and efficiently remove the protrusions on the surface of the magnetic disk, the chip pocket is not a necessary condition, but an Al 2 O 3 abrasive grain group is provided with an abrasive grain layer in which diamond abrasive grains are scattered. Polishing is carried out using the wrapping tape having. Further, in order to finish the surface more precisely without processing scratches, lapping tape having chip pockets in the abrasive grain layer is used for polishing. Thereby, the protrusions on the surface of the magnetic disk can be economically and efficiently polished. Since the surface of the magnetic disk can be processed with high accuracy, the flying height of the magnetic head can be reduced.

【0006】[0006]

【実施例】以下、本発明の実施例を、図面により詳細に
説明する。第1図は、本発明の一実施例を示す研磨部材
であるラッピングテ−プ表面部の構造図であり、第2図
は第1図における一部を拡大して示した図である。本実
施例においては、ラッピングテ−プとしての特性が出る
砥粒率、つまり加工キズが出ないようにチップポケット
を構成するに必要な砥粒含率を、例えばAl23の砥粒
で構成し、そこにフィラに対して高切削性を持つダイア
砥粒が点在する構造にする。これにより、加工キズを付
けることなく、媒体表面に突出したフィラの頭を十分に
削り切る能力を持つラッピングテ−プを実現することが
できる。なお、磁気ディスキの表面の突起を経済的に効
率よく削るためには、チップポケットは必要条件ではな
く、Al23砥粒群にダイヤモンド砥粒が点在する砥粒
層を有するラッピングテ−プを用いて研磨することが望
ましい。また、表面に加工キズを付けないで、さらに精
度よく仕上げるためには、砥粒層にチップポケットを設
けたラッピングテ−プを用いて研磨することが望まし
い。
Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a structural view of a lapping tape surface portion which is an abrasive member showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a part of FIG. In the present embodiment, the rate of the abrasive grain that provides the characteristics as a lapping tape, that is, the abrasive grain content necessary to configure the chip pocket so that the processing flaw does not occur, for example, with the abrasive grain of Al 2 O 3. The structure is such that diamond abrasive grains having high machinability with respect to the filler are scattered therein. As a result, it is possible to realize a wrapping tape having the ability to sufficiently scrape off the head of the filler protruding on the surface of the medium without causing a processing flaw. The chip pocket is not a necessary condition for economically and efficiently scraping the protrusions on the surface of the magnetic disk, but a lapping tape having an abrasive grain layer in which diamond abrasive grains are scattered in the Al 2 O 3 abrasive grain group. It is desirable to polish using a polishing pad. Further, in order to finish the surface more accurately without causing scratches on the surface, it is desirable to use a lapping tape having a chip pocket in the abrasive grain layer for polishing.

【0007】第1図、第2図において、1は砥粒群、2
はチップポケット、3はAl23砥粒あるいはSiC砥
粒、4はダイア砥粒、5はバインダ樹脂である。第1図
に示すように、砥粒群1の間にあるチップポケット2の
存在が、加工キズを付けずに高精度に仕上げるための必
要条件である。このチップポケット2を有する砥粒群構
造を形成するには、高い砥粒率を必要とする。ここで、
もし切削性の高いダイア砥粒4のみで、この高い砥粒率
を構成するときには、高価になり過ぎてしまい、製品に
適用できなくなる。そこで、本実施例では、チップポケ
ット2を有する砥粒群構造を、例えば、Al23の砥粒
3で構成し、そこに第2図に示すように、ダイア砥粒4
が点在する構造とすることにより、加工キズを付けず媒
体表面に突出したフィラの頭を十分に削り切ることがで
きるラッピングテ−プが得られる。
In FIGS. 1 and 2, 1 is an abrasive grain group, 2
Is a chip pocket, 3 is an Al 2 O 3 abrasive grain or SiC abrasive grain, 4 is a diamond abrasive grain, and 5 is a binder resin. As shown in FIG. 1, the existence of the chip pockets 2 between the abrasive grain groups 1 is a necessary condition for finishing with high accuracy without any processing flaws. A high abrasive grain ratio is required to form an abrasive grain group structure having the chip pocket 2. here,
If the diamond abrasive grains 4 having high machinability alone are used to form this high abrasive grain ratio, the diamond abrasive grains 4 become too expensive and cannot be applied to products. Therefore, in this embodiment, the abrasive grain group structure having the chip pockets 2 is composed of, for example, the abrasive grains 3 of Al 2 O 3 , and as shown in FIG.
With the structure in which the dots are scattered, a lapping tape capable of sufficiently cutting off the head of the filler protruding to the medium surface without processing scratches can be obtained.

【0008】本実施例では、このように、(a)チップ
ポケット構造を有するAl23あるいはSiCの砥粒の
群を含むこと、(b)これらのAl23砥粒群の中に少
量のダイア砥粒を点在させること、(c)このような原
料を用いてラッピングテ−プを作成し、このテ−プを用
いて磁気ディスクを研磨すること、の3点が重要事項で
ある。これらの原料をポリエステルフィルム(マイラ)
の上に塗布して、乾燥させることにより、本実施例のラ
ッピングテ−プが完成する。なお、チップポケットと
は、物体の存在しない穴であって、砥粒群を処理するこ
とにより、砥粒相互間に凹みが生じた場所である。この
チップポケットがない砥粒群のみでラッピングテ−プを
作成した場合には、削られた切り粉が砥粒群の上に付着
して、摩擦が多くなる。切り粉の塊が砥粒群の上に付着
すると、媒体表面の高精度化が不可能となる。これに対
して、チップポケットを有する砥粒を用いた場合には、
削られた切り粉がこの中に逃げ込み、表面の高精度化が
可能となる。つまり、チップポケットは、切り粉の逃げ
道となる。また、ダイア砥粒を少量含ませることも、本
実施例の要点である。
In this embodiment, as described above, (a) the group of abrasive grains of Al 2 O 3 or SiC having a chip pocket structure is included, and (b) these groups of Al 2 O 3 grains are included. Three important points are to intersperse a small amount of diamond abrasive grains, (c) to prepare a lapping tape using such a raw material, and to polish a magnetic disk using this tape. is there. Polyester film (myra) made from these raw materials
The wrapping tape of this embodiment is completed by applying it on the above and drying it. The chip pocket is a hole in which an object does not exist, and is a place where a recess is formed between the abrasive grains by processing the abrasive grain group. When the lapping tape is formed only by the abrasive grain group without the chip pocket, the scraped chips adhere to the abrasive grain group, resulting in increased friction. If a mass of cutting powder adheres to the abrasive grain group, it becomes impossible to improve the accuracy of the medium surface. On the other hand, in the case of using abrasive grains having a chip pocket,
The shavings escaped into this, and the surface can be made more precise. In other words, the chip pocket provides a way for chips to escape. Further, the inclusion of a small amount of diamond abrasive grains is also an important point of this embodiment.

【0009】第1図、第2図に示す構造を備えたラッピ
ングテ−プを用いて、磁気ディスクを研磨することによ
り、加工キズを付けずに、媒体表面に突出したフィラの
頭を十分に削り切ることができ、媒体表面の高精度化が
可能となる。
The lapping tape having the structure shown in FIGS. 1 and 2 is used to polish the magnetic disk, so that the head of the filler protruding to the surface of the medium can be sufficiently scratched without being scratched. It can be scraped off, and the precision of the medium surface can be improved.

【0010】[0010]

【発明の効果】以上説明したように、本発明によれば、
磁気ディスク表面の突起を経済的に効率よく研磨するこ
とが可能となる。また、磁気ディスク表面が高精度に加
工できるので、磁気ヘッドの低浮上化が可能となる。
As described above, according to the present invention,
The protrusions on the surface of the magnetic disk can be economically and efficiently polished. Further, since the surface of the magnetic disk can be processed with high precision, the flying height of the magnetic head can be reduced.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例を示す研磨部材であるラッピ
ングテ−プ表面部の構造図である。
FIG. 1 is a structural view of a lapping tape surface portion which is a polishing member showing an embodiment of the present invention.

【図2】第1図における砥粒構成の一部拡大図である。FIG. 2 is a partially enlarged view of the constitution of abrasive grains in FIG.

【符号の説明】[Explanation of symbols]

1 砥粒群 2 チップポケット 3 Al23砥粒またはSiC砥粒 4 ダイア砥粒 5 バインダ樹脂 A 第2図に示す拡大範囲1 Abrasive Grain Group 2 Chip Pocket 3 Al 2 O 3 Abrasive Grain or SiC Abrasive Grain 4 Diamond Abrasive Grain 5 Binder Resin A Enlarged Range Shown in FIG.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 文岡 順 神奈川県小田原市国府津2880番地 株式会 社日立製作所小田原工場内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Jun Fumioka 2880 Kozu, Odawara City, Kanagawa Stock Company Hitachi Ltd. Odawara Factory

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 ベ−ス部材と、該ベ−ス部材上に形成さ
れた硬度が異なる少なくとも2種類の砥粒を含む砥粒層
とを有することを特徴とする研磨部材。
1. A polishing member comprising a base member and an abrasive grain layer formed on the base member and containing at least two types of abrasive grains having different hardnesses.
【請求項2】 前記砥粒は、ダイヤモンドと該ダイヤモ
ンドよりも硬度の低い物質であることを特徴とする特許
請求の範囲第1項記載の研磨部材。
2. The polishing member according to claim 1, wherein the abrasive grains are diamond and a substance having a hardness lower than that of the diamond.
【請求項3】 前記ダイヤモンドよりも硬度の低い物質
は、Al23あるいはSiCであることを特徴とする特
許請求の範囲第2項記載の研磨部材。
3. The polishing member according to claim 2 , wherein the substance having a hardness lower than that of diamond is Al 2 O 3 or SiC.
【請求項4】 前記ベ−ス部材は、フィルムであること
を特徴とする特許請求の範囲第1項、第2項、第3項の
いずれかに記載の研磨部材。
4. The polishing member according to any one of claims 1, 2, and 3, wherein the base member is a film.
【請求項5】 前記砥粒層には、砥粒相互間に凹みが形
成されていることを特徴とする特許請求の範囲第4項記
載の研磨部材。
5. The polishing member according to claim 4, wherein the abrasive grain layer has recesses formed between the abrasive grains.
JP31453392A 1992-11-25 1992-11-25 Abrasive member Pending JPH05305570A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31453392A JPH05305570A (en) 1992-11-25 1992-11-25 Abrasive member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31453392A JPH05305570A (en) 1992-11-25 1992-11-25 Abrasive member

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP60266926A Division JPH0741530B2 (en) 1985-11-27 1985-11-27 Magnetic disk manufacturing method

Publications (1)

Publication Number Publication Date
JPH05305570A true JPH05305570A (en) 1993-11-19

Family

ID=18054438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31453392A Pending JPH05305570A (en) 1992-11-25 1992-11-25 Abrasive member

Country Status (1)

Country Link
JP (1) JPH05305570A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4961787A (en) * 1972-10-12 1974-06-14
JPS5497408A (en) * 1978-01-19 1979-08-01 Fuji Photo Film Co Ltd Polishing tape
JPS56122379A (en) * 1980-03-03 1981-09-25 Sankyo Co Ltd 1-carba-2-penem-3-carboxylic acid derivative

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4961787A (en) * 1972-10-12 1974-06-14
JPS5497408A (en) * 1978-01-19 1979-08-01 Fuji Photo Film Co Ltd Polishing tape
JPS56122379A (en) * 1980-03-03 1981-09-25 Sankyo Co Ltd 1-carba-2-penem-3-carboxylic acid derivative

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