JPS62289925A - Magnetic disk consisting of glass plate - Google Patents
Magnetic disk consisting of glass plateInfo
- Publication number
- JPS62289925A JPS62289925A JP61133294A JP13329486A JPS62289925A JP S62289925 A JPS62289925 A JP S62289925A JP 61133294 A JP61133294 A JP 61133294A JP 13329486 A JP13329486 A JP 13329486A JP S62289925 A JPS62289925 A JP S62289925A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- glass plate
- disk
- magnetic powder
- component
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 35
- 239000006247 magnetic powder Substances 0.000 claims abstract description 23
- 239000005373 porous glass Substances 0.000 claims abstract description 16
- 239000011148 porous material Substances 0.000 claims abstract description 6
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 claims description 19
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000010419 fine particle Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract description 3
- 239000005388 borosilicate glass Substances 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract 4
- 229910052906 cristobalite Inorganic materials 0.000 abstract 4
- 239000000377 silicon dioxide Substances 0.000 abstract 4
- 229910052682 stishovite Inorganic materials 0.000 abstract 4
- 229910052905 tridymite Inorganic materials 0.000 abstract 4
- 229910000859 α-Fe Inorganic materials 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 238000005191 phase separation Methods 0.000 description 4
- 239000005368 silicate glass Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000011019 hematite Substances 0.000 description 3
- 229910052595 hematite Inorganic materials 0.000 description 3
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- -1 silicate alkoxide Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Surface Treatment Of Glass (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Compounds Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔発明の目的〕
（産業上の利用分野）
本発明はコンピュータの記録媒体として使用される磁気
ディスク、特にバリウムフェライト磁性粉を埋設した高
ティ酸系多孔質ガラス円板からなり、高密度の記録が得
られて出力が大きく、かつすぐれた耐久性を有するガラ
ス板磁気ディスクに関する。Detailed Description of the Invention 3. Detailed Description of the Invention [Object of the Invention] (Field of Industrial Application) The present invention relates to a magnetic disk used as a recording medium of a computer, particularly a high-temperature magnetic disk in which barium ferrite magnetic powder is embedded. The present invention relates to a glass plate magnetic disk which is made of an acid-based porous glass disk and has high-density recording, large output, and excellent durability.
（従来の技術） 従来、コンピュータの記録媒体は、磁気テープ。(Conventional technology) Conventionally, the recording medium for computers has been magnetic tape.
フロッピーディスク、磁気ドラムまたはハードディスク
などが使用されているが、記憶容量、アクセス時間およ
びビット当りの価格について比較すると、八−ドディス
クが総合的にすぐれている。Although floppy disks, magnetic drums, hard disks, etc. are used, when comparing storage capacity, access time, and price per bit, eight-head disks are superior overall.
八−ドディスクは、アルミニウム基板にガンマヘマタイ
ト（α−Ｆ ｅ２ ｏ３）などの磁性材料を数ミクロン
の厚さに塗布した後、加熱乾燥して仕上げたものである
。The eight-dimensional disc is made by coating an aluminum substrate with a magnetic material such as gamma hematite (α-F e2 o3) to a thickness of several microns, and then heating and drying the coated material.
このハードディスクは磁気ヘッドがディスク面上を浮上
しているので、ディスク面にうねりや突起などがあると
、磁気ヘッドの浮上が不安定になったシ、磁気ヘッドが
磁性面に接触して傷をつけ記録を消失することがある。This hard disk has a magnetic head floating above the disk surface, so if there are undulations or protrusions on the disk surface, the floating of the magnetic head will become unstable, and the magnetic head will come into contact with the magnetic surface and cause scratches. Recordings may be lost.
このためディスクのアルミニウム基板は、全面研磨仕上
げして平坦にする必要がある。またディスク面に塗布さ
れているガンマヘマタイトは、磁性粉の粒子径が３００
０λ以上で大きく、記録密度をさらに向上させることが
むつかしい状態である。ガンマヘマタイトの代わりに、
ディスク面にニッケルクロム系の金属を蒸着した金属薄
膜媒体を使用することも行なわれているが、磁気ヘッド
にこすられたとき傷つき易く、寿命が短い。For this reason, the entire surface of the aluminum substrate of the disk must be polished to make it flat. In addition, the gamma hematite coated on the disk surface has a magnetic powder particle size of 300 mm.
It is large when it is 0λ or more, and it is difficult to further improve the recording density. Instead of gamma hematite,
Although thin metal film media with nickel-chromium metal deposited on the disk surface have been used, they are easily damaged when rubbed by a magnetic head and have a short lifespan.
（発明が解決しようとする問題点）
従来の磁気ディスクたとえはノ）−ドディスクは磁気ヘ
ッドの浮上を安定にさせるため、アルミニウム基板を全
面研磨仕上げしなけれはならず、かつ磁性粉の粒子径の
関係から記録密度の向上が限界にきている。また記録密
度を向上させるためニッケルクロム系の金属薄膜媒体を
使用したディスクは、耐久性に劣る欠点がある。(Problems to be Solved by the Invention) In order to stabilize the flying of a magnetic head in a conventional magnetic disk (for example, a node), the aluminum substrate must be completely polished, and the particle size of the magnetic powder must be Due to this relationship, the improvement in recording density has reached its limit. Furthermore, disks using nickel-chromium metal thin film media to improve recording density have the disadvantage of poor durability.
本発明は上記事情を考慮してなされたもので、高ティ酸
系多孔質ガラス円板にバリウムフェライト磁性粉を埋設
することにより、研磨性がよく、記録密度および耐久性
を向上させたガラス板磁気ディスクを提供することを目
的とする。The present invention has been made in consideration of the above circumstances, and is a glass plate with good polishability, improved recording density, and durability by embedding barium ferrite magnetic powder in a high-Ti acid based porous glass disk. The purpose is to provide magnetic disks.
（問題点を解決するための手段）
本発明は上記の目的を達成するため、ガラスの分相処理
によって得られる高ケイ酸系多孔質ガラスを使用してデ
ィスク基板を形成し、ガラスの分相によって生成された
微細孔にバリウムフェライト磁性粉を埋設したものであ
る。すなわち、所定の組成を有する高ケイ酸系ガラスを
板状に成形した後、磁気ディスク状に加工し、表面を研
磨し平坦にしてから分相処理すると、高ケイ酸系多孔質
ガラスからなるディスク状ガラス板ができる。このディ
スク状ガラス板の微細孔にバリウムフェライト磁性粉を
充填すると、所肇のガラス板磁気ディスクが得られる。(Means for Solving the Problems) In order to achieve the above object, the present invention forms a disk substrate using high silicate porous glass obtained by phase separation treatment of glass, and Barium ferrite magnetic powder is embedded in the micropores created by the process. That is, after forming high silicate glass having a predetermined composition into a plate shape, processing it into a magnetic disk shape, polishing the surface to make it flat, and then performing phase separation treatment, a disk made of high silicate glass is formed. A shaped glass plate is produced. By filling the micropores of this disk-shaped glass plate with barium ferrite magnetic powder, a conventional glass plate magnetic disk is obtained.
（作 用）
このガラス板磁気ディスクは、ディスク機能に十分適合
する表面精度を有しておシ、その微細孔に埋設されたバ
リウムフェライト磁性粉によって高密度の磁性膜が形成
されているので、膜剥れなど傷が付きに＜＜、記録の消
失が少ない。またディスク基板が高ケイ酸系ガラスであ
夛、熱膨張変化が小さく誤差も少なく、摩擦による温度
上昇があっても有利である。(Function) This glass plate magnetic disk has a surface precision that is sufficient for the disk function, and a high-density magnetic film is formed by barium ferrite magnetic powder embedded in its micropores. There is less chance of record loss due to scratches such as film peeling. In addition, since the disk substrate is made of high silicate glass, thermal expansion changes are small and errors are small, which is advantageous even when there is a temperature rise due to friction.
（実施例）
本発明の詳細を図示の実施例によシ説明する０（１）は
ディスク状＋Ｓ形成された多孔質ガラス板で微細孔（２
）には六角板状バリウムフェライト磁性粉（３）が埋設
されている。多孔質ガラス板（１）の上面にハ、埋設し
たバリウムフェライト磁性粉（３）をおおうとともにそ
の表面を平坦にするため、表面封止膜（４）が被着され
ている。(Example) The details of the present invention will be explained with reference to the illustrated embodiment.
) is embedded with hexagonal plate-shaped barium ferrite magnetic powder (3). A surface sealing film (4) is applied to the upper surface of the porous glass plate (1) in order to cover the buried barium ferrite magnetic powder (3) and to flatten the surface.
多孔質ガラス板（１）を形成するガラスは、たとえば米
国コーニング社製バイコール（商品名）または米国ＰＰ
Ｇ社製多孔質ガラスが使用され、表１に示すガラス組成
のＮａ２Ｏ−Ｂ２Ｏ３−Ｓ ｉ０２糸硼ケイ酸ガラスを
、ガラスＡｔ１１４００℃、ガラスＢは１２００℃程度
の温度で溶融し、使用目的に応じて板状、管状または粒
状等の形状に成形する。The glass forming the porous glass plate (1) is, for example, Vycor (trade name) manufactured by Corning Corporation in the United States or PP in the United States.
Porous glass made by Company G was used, and Na2O-B2O3-S i02 borosilicate glass with the glass composition shown in Table 1 was melted at a temperature of about 11,400°C for glass and 1200°C for glass B, and then melted according to the purpose of use. It is then molded into a plate, tube, or granule shape.
次にこの原ガラス板を５００〜５５０℃の温度で１〜３
．０時間加熱処理して相分離させる。この分相処理によ
り４０〜２５００Ａの間で、Ｎ ａ ２０−表１
Ｂ２Ｏ３成分のガラス相と、８１０□成分のガラス相と
が相分離する。このガラスを酸溶液たとえば塩酸または
熱水中に浸漬すると、Ｎａ、０−Ｂ、０３成分のガラス
相は溶出゛して、無数個の微細孔（２）を有するＳｉＯ
□成分のみの高ケイ酸系多孔質ガラス板（１）が得られ
る。この８ｉ０□成分は９６〜９９重蓋％含有され、見
掛比重１．５、熱膨張係数６Ｘ１０−’／℃で、石英ガ
ラスに近い特性を有する低膨張率ガラスである。微細孔
（２）の直径は熱処理温度と時間により自由に制御され
、本発明に最も適した４００〜８００Ａの孔径のものが
容易に得られる。Next, this original glass plate is heated at a temperature of 500 to 550°C for 1 to 3 hours.
．． Heat treatment for 0 hours to cause phase separation. By this phase separation treatment, the glass phase of the N a 20-Table 1 B2O3 component and the glass phase of the 810□ component are phase-separated between 40 and 2500A. When this glass is immersed in an acid solution such as hydrochloric acid or hot water, the glass phase of Na, 0-B, and 03 components is eluted, and SiO
A high silicic acid porous glass plate (1) containing only the □ component is obtained. This 8i0□ component is contained in an amount of 96 to 99%, and has an apparent specific gravity of 1.5 and a coefficient of thermal expansion of 6×10-'/° C., making it a low-expansion glass having properties close to those of quartz glass. The diameter of the fine pores (2) can be freely controlled by the heat treatment temperature and time, and a pore diameter of 400 to 800 A, which is most suitable for the present invention, can be easily obtained.
ガラス結晶化法によって作られた直径５００〜８００Ａ
、厚み１００〜３００Ａの超微粒子六角板状バリウムフ
ェライト磁性粉（３）を、微細孔（２）に塗り込むか、
またはよく分散された伏線のバリウムフェライト磁性粉
懸濁液中に多孔質ガラス板（１）を浸漬して微細孔（２
）中に吸着させる。微細孔（２）にバリウムフェライト
磁性粉（３）を埋設した多孔質ガラス板（１）の上面に
、表面封止膜（４）たとえばケイ酸アルコキシド液を塗
層して表面を平坦にする。バリウムフェライト磁性粉（
３）は、磁気特性保磁力４００〜１５０００ｅの範囲内
のものを任意に選択して使用すれはよい。Diameter 500-800A made by glass crystallization method
, Apply ultrafine hexagonal plate-shaped barium ferrite magnetic powder (3) with a thickness of 100 to 300 A into the micropores (2), or
Alternatively, a porous glass plate (1) is immersed in a well-dispersed foreshadowing barium ferrite magnetic powder suspension.
). A surface sealing film (4) such as a silicate alkoxide liquid is coated on the upper surface of a porous glass plate (1) in which barium ferrite magnetic powder (3) is embedded in micropores (2) to flatten the surface. Barium ferrite magnetic powder (
For 3), a magnetic material having a coercive force of 400 to 15,000 e may be arbitrarily selected and used.
このように構成されたガラス板磁気ディスクは原ガラス
を板状に成形した後、磁気ディスク状に加工、研磨され
平坦にしてから多孔質ガラスにされるので、表面精度は
ディスク機能に十分適合するものであり、その微細孔に
充填される六角板状バリウムフェライト磁性粉は、機械
的に押し込まれる際に板が槓み重なった方向に並ぶ特性
があるので、一定の方向を指向して埋設されたバリウム
フェライト磁性粉によって、高密度の垂直磁化膜力形成
される。バリウムフェライト磁性粉懸濁液中に多孔質ガ
ラス板を浸漬した場合は、このガラスのすぐれた吸着性
によって、バリウムフェライトの粒子が微細孔に十分浸
入し、良好な磁性膜が形成される。Glass plate magnetic disks constructed in this way are formed from original glass into a plate shape, processed into a magnetic disk shape, polished and flattened before being made into porous glass, so the surface precision is sufficient to suit the disk function. The hexagonal plate-shaped barium ferrite magnetic powder that fills the micropores has a characteristic that when mechanically pushed in, the plates are bent and lined up in the overlapping direction, so they are buried oriented in a certain direction. The barium ferrite magnetic powder forms a high-density perpendicular magnetization film. When a porous glass plate is immersed in a barium ferrite magnetic powder suspension, the barium ferrite particles sufficiently penetrate into the micropores due to the glass's excellent adsorption properties, forming a good magnetic film.
以上のように本発明は、円板状の高ケイ酸系ガラスで、
その微細孔にバリウムフェライト磁性粉を埋設してなる
ガラス板磁気ディスクであり、次の利点を有するもので
ある。As described above, the present invention is a disc-shaped high silicate glass,
This is a glass plate magnetic disk in which barium ferrite magnetic powder is embedded in the micropores, and has the following advantages.
■ ガラス基板からなるディスクは高い表向精度が得ら
れる。■ Discs made of glass substrates provide high surface accuracy.
■ Ｓ ｒ Ｏｚ酸成分９６〜９９車殖％を占めるので
熱膨張変化が他のものより小さく、誤差が少ない。■ Since the SrOz acid component accounts for 96-99% of the hybridization, the thermal expansion change is smaller than other types, and there are fewer errors.
■ 基板がガラスであるため、摩擦による温度上昇があ
っても有利である。■ Since the substrate is glass, it is advantageous even if there is a temperature increase due to friction.
■ 磁性膜がガラス基板内に埋設されているので膜剥れ
など傷が付きに＜＜、記録の消失が少ないＯ
■ バリウムフェライト磁性粉を使用しているので、高
度の記録密度が得られる。■ Since the magnetic film is embedded within the glass substrate, there is less chance of scratches such as peeling of the film, and less loss of recording. ■ Since barium ferrite magnetic powder is used, a high recording density can be obtained.
■ 保磁力は用途に応じて４００〜１５０００ｅの範囲
を自由に選択することができる。(2) The coercive force can be freely selected from the range of 400 to 15,000e depending on the application.
図面は本発明の実施例を示す要部の拡大断面図である。 The drawings are enlarged sectional views of essential parts showing embodiments of the present invention.
Claims (2)
微細孔にバリウムフェライト磁性粉を埋設してなるガラ
ス板磁気ディスク。(1) A glass plate magnetic disk made of disc-shaped high silicate porous glass with barium ferrite magnetic powder embedded in its micropores.
り）前記バリウムフェライト磁性粉が直径１００〜８０
０Å、厚さ４０〜３００Åの六角板状の微粒子粉である
特許請求の範囲第１項に記載のガラス板磁気ディスク。(2) The fine pores are through holes with a diameter of 40 to 2500 Å) The barium ferrite magnetic powder has a diameter of 100 to 80 Å.
The glass plate magnetic disk according to claim 1, which is a hexagonal plate-shaped fine particle powder with a thickness of 0 Å and a thickness of 40 to 300 Å.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61133294A JPS62289925A (en) | 1986-06-09 | 1986-06-09 | Magnetic disk consisting of glass plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61133294A JPS62289925A (en) | 1986-06-09 | 1986-06-09 | Magnetic disk consisting of glass plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62289925A true JPS62289925A (en) | 1987-12-16 |
Family
ID=15101290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61133294A Pending JPS62289925A (en) | 1986-06-09 | 1986-06-09 | Magnetic disk consisting of glass plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62289925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018052079A (en) * | 2016-09-30 | 2018-04-05 | 株式会社環境レジリエンス | Individual authentication medium, creation method thereof and authentication system using the same |
-
1986
- 1986-06-09 JP JP61133294A patent/JPS62289925A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018052079A (en) * | 2016-09-30 | 2018-04-05 | 株式会社環境レジリエンス | Individual authentication medium, creation method thereof and authentication system using the same |
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