JP2605309B2 - High density floppy disk - Google Patents
High density floppy diskInfo
- Publication number
- JP2605309B2 JP2605309B2 JP62281207A JP28120787A JP2605309B2 JP 2605309 B2 JP2605309 B2 JP 2605309B2 JP 62281207 A JP62281207 A JP 62281207A JP 28120787 A JP28120787 A JP 28120787A JP 2605309 B2 JP2605309 B2 JP 2605309B2
- Authority
- JP
- Japan
- Prior art keywords
- floppy disk
- film
- magnetic
- metal thin
- thin film
- 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.)
- Expired - Lifetime
Links
Landscapes
- Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、ポリエステルフィルム等の基体上に、磁性
を塗布して、磁性層を形成した高密度記録磁気ディスク
に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-density recording magnetic disk in which a magnetic layer is formed by applying magnetism on a substrate such as a polyester film.
従来の技術 近年、パソコン等の外部記録としてフロッピー磁気デ
ィスクが広く用いられている。このフロッピーディスク
は、ポリエステル等の基体上に磁性塗料を塗布し、表面
処理した後、硬化、円盤状への打ち拍き、表面研磨さ
れ、所定のケースに入れられて作製される。2. Description of the Related Art In recent years, floppy magnetic disks have been widely used as external recording for personal computers and the like. This floppy disk is manufactured by applying a magnetic paint on a base material such as polyester, treating the surface, hardening, striking into a disk shape, polishing the surface, and placing in a predetermined case.
発明が解決しようとする問題点 フロッピーディスクは、高密度、大容量化が要求され
ているが、ディスク自体の温湿度膨張係数が基体として
用いるポリエステル等の温湿度膨張係数により決定され
るため極めて大きく、そのためオフトラック量が増大
し、トラック密度を大きくすることができないうという
問題点を有していた。Problems to be Solved by the Invention Floppy disks are required to have high density and large capacity. However, since the temperature and humidity expansion coefficient of the disk itself is determined by the temperature and humidity expansion coefficient of polyester or the like used as a base, it is extremely large. Therefore, there is a problem that the amount of off-track increases and the track density cannot be increased.
問題点を解決するための手段 上記問題点を解決するために、本発明の磁気ディスク
は、磁性塗料の塗布前のポリエステル等の基体上に非磁
性のチタンからなる金属薄膜を設けることを特徴とす
る。Means for Solving the Problems In order to solve the above problems, the magnetic disk of the present invention is characterized in that a metal thin film made of non-magnetic titanium is provided on a base such as polyester before applying a magnetic paint. I do.
作用 本発明は上記構成によって、ポリエステル等の基体に
大きく依存するフロッピーディスクの温湿度膨張係数
を、小さく抑えることにより、トラックずれの小さくト
ラック密度の向上が可能な高記録密度フロッピーディス
クを得ることができる。Function The present invention can provide a high-recording-density floppy disk capable of improving track density with a small track shift by suppressing the temperature-humidity expansion coefficient of a floppy disk that largely depends on a base material such as polyester by the above-described structure. it can.
実 施 例 以下、本発明の実施例について図面を参照しながら説
明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第２図は従来のフロッピーディスクの断面図を示すも
のである。FIG. 2 is a sectional view of a conventional floppy disk.
ポリエステルフィルム等の基体フィルム１上に磁性塗
料の塗布により磁性塗膜２を設けている。第１図は本発
明のフロッピーディスクの断面を示すものである。磁性
塗料の塗布の前に金属薄膜３を基体フィルム１上に設け
ているため、基体１と磁性塗膜２の間にTiからなる金属
薄膜層３が存在している。A magnetic coating film 2 is provided on a base film 1 such as a polyester film by applying a magnetic paint. FIG. 1 shows a cross section of a floppy disk according to the present invention. Since the metal thin film 3 is provided on the base film 1 before the application of the magnetic paint, the metal thin film layer 3 made of Ti exists between the base 1 and the magnetic coating film 2.
具体的な実施例としては、厚みが33μｍ、62μｍ、75
μｍのポリエステルフィルムの表面をグロー放電等で活
性化した後、金属薄膜を真空中でフィルム上（両面）に
設け、その後、別途作製した磁性塗料をこのフィルム上
に塗布し、カレンダー処理をして硬化を行った。As specific examples, the thickness is 33 μm, 62 μm, 75 μm,
After activating the surface of a μm polyester film by glow discharge or the like, a metal thin film is provided on the film (both sides) in a vacuum, and then a separately prepared magnetic paint is applied on the film and calendered. Curing was performed.
これら実施例の内容とその温湿度膨張係数を下記の表
に示す。The contents of these examples and the temperature and humidity expansion coefficients are shown in the table below.
次に、参考例として金属薄膜としてCu、Alを用いた場
合と、比較例として従来の基体上に磁性塗料を塗布した
場合のフロッピーディスクの温湿度膨張係数も下記表に
記述し、実施例と比較した。Next, the temperature and humidity expansion coefficients of floppy disks in the case where Cu and Al were used as the metal thin film as a reference example and the case where a magnetic paint was applied on a conventional substrate as a comparative example are also described in the following table. Compared.
金属薄膜が存在する場合、温湿度膨張係数は比較例と
比べて小さくなっているが、特にTiを用いた実施例では
顕著である。When a metal thin film is present, the temperature / humidity expansion coefficient is smaller than that of the comparative example, but is particularly remarkable in the example using Ti.
これは、基体の膨張を表面に設けた金属薄膜が抑える
ように働くためであると考えられ、金属の弾性率が基体
のそれに比べて著しく大きいことが有効に作用してい
る。 This is considered to be because the metal thin film provided on the surface suppresses the expansion of the base, and it is effective that the elastic modulus of the metal is significantly larger than that of the base.
また、金属表面には空気中の水分との反応によって水
酸基が存在し、この水酸基により磁性塗膜の接着性が向
上し、また金属薄膜によってフロッピーディスクの光透
過率の低下も期待できる。Further, a hydroxyl group is present on the metal surface due to a reaction with moisture in the air, and the hydroxyl group improves the adhesiveness of the magnetic coating film, and the metal thin film can be expected to lower the light transmittance of the floppy disk.
発明の効果 以上説明したように、本発明によれば、フロッピーデ
ィスクの温湿度膨張係数を小さくすることができ、トラ
ック密度の向上を図り高密度記録フロッピーディスクを
作製することができる。Effects of the Invention As described above, according to the present invention, the coefficient of temperature and humidity expansion of a floppy disk can be reduced, the track density can be improved, and a high-density recording floppy disk can be manufactured.
第１図は本発明の実施例を示す断面図、第２図は従来の
フロッピーディスクの断面図である。 １……基体フィルム、２……磁性塗膜、３……金属薄
膜。FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional floppy disk. 1 ... Base film, 2 ... Magnetic coating, 3 ... Metal thin film.
Claims (1)
を形成し、その上に磁性層を塗布することを特徴とする
高密度フロッピーディスク。1. A high-density floppy disk characterized in that a metal thin film made of nonmagnetic titanium is formed on a substrate, and a magnetic layer is coated thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62281207A JP2605309B2 (en) | 1987-11-06 | 1987-11-06 | High density floppy disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62281207A JP2605309B2 (en) | 1987-11-06 | 1987-11-06 | High density floppy disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01122022A JPH01122022A (en) | 1989-05-15 |
| JP2605309B2 true JP2605309B2 (en) | 1997-04-30 |
Family
ID=17635849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62281207A Expired - Lifetime JP2605309B2 (en) | 1987-11-06 | 1987-11-06 | High density floppy disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2605309B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04134723A (en) * | 1990-09-27 | 1992-05-08 | Fuji Photo Film Co Ltd | Magnetic recording medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58199433A (en) * | 1982-05-17 | 1983-11-19 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing plate |
| JPH0760511B2 (en) * | 1985-06-26 | 1995-06-28 | 株式会社東芝 | High durability magnetic recording medium |
-
1987
- 1987-11-06 JP JP62281207A patent/JP2605309B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01122022A (en) | 1989-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5336550A (en) | Carbon overcoat for magnetic head sliders | |
| US5654850A (en) | Carbon overcoat with electrically conductive adhesive layer for magnetic head sliders | |
| JPS63220420A (en) | Recording medium and production thereof | |
| US4074016A (en) | Magnetic record carrier | |
| JP2605309B2 (en) | High density floppy disk | |
| JPS60195738A (en) | Manufacture of magnetic disk | |
| JPH0612568B2 (en) | Magnetic recording medium | |
| JPS5996539A (en) | Magnetic recording disc | |
| JPH01122023A (en) | High-density floppy disk | |
| US4686151A (en) | Substrate material for magnetic recording media | |
| KR920008933B1 (en) | Magnetic recording medium | |
| JPH02308445A (en) | Magneto-optical disk | |
| JPS6061920A (en) | Magnetic recording medium | |
| JPS62209719A (en) | Magnetic recording medium | |
| JP2665949B2 (en) | Thin film magnetic head | |
| JPH0224821A (en) | Magnetic recording medium | |
| JPH0450649B2 (en) | ||
| JPH0376023A (en) | Magnetic disk | |
| JPH065574B2 (en) | Magnetic recording medium | |
| JPS62270021A (en) | Production of magnetic recording medium | |
| JPH07111775B2 (en) | Magnetic recording medium | |
| JPS58155516A (en) | Vertical magnetic recording medium | |
| JPS62110619A (en) | Magnetic recording medium | |
| JPH0833984B2 (en) | Magnetic recording medium and method of manufacturing the same | |
| JPS60219625A (en) | Magnetic recording medium |