Developing Magneto-optical discs by applying new technology derrite platir

应用新技术derrite platir开发磁光盘

• 批准号: 60850059
• 负责人: ABE Masanori
• 金额: $ 4.8万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60850059/
• 关键词: Magneto-Optical Disc; Ferrite Plating; Spray-Spin-coating Method; 媒体雑音; 結晶粒径; マグネタイト; コバルトフェライト; 表面あらさ; フェライト膜; 光磁気記録媒体; 磁気ディスク; メッキ膜

1) Applying to magneto-optical memoty, wemust deposite magnetic film of good quality uniformly over a wide area of a disc as large as 8-12" in diameter. We have improved in this study ferrite plating methods to fit for this application. "Thin liquid filmmethod" and "spray spin-coating method" were invented, which facilitated formation of good-quality film uniformly over the whole area of an 8" disc.2) To save labor in experiment on sprey-spin coating method, which is the best one for prouducing magneto-optical discs, we have so chosen the pH values of reaction and oxidizing solutions that we dont need to use oxygen-free water. This facilitated mass production of magneto-optical disc by the ferrite plating.3) To reduce media noise in magneto-optical recording, we have found plating conditions on which film if good surface smoothness and small size is obtained. The film quality further improved by using a clean room and filters. Adding dextran or sucrose made the film smaller in grain size.4) By choosing value of x in Fe_<3-x> Co_xO_4, we can obtain coercive magnetic force fitted for magneto-optical disc in plated films of the solid solution spinel.5) Adhesion of the ferrite-plating film onto substrate of plastics such as acryl and polycarbonate (which are used for magneto-oprical discs) can be enhanced by exposing the surface of the substrate to an air plasma.

1)应用于磁光存储器，我们必须在直径为8-12英寸的磁盘的大面积上均匀地沉积高质量的磁膜。我们在这项研究中改进了铁氧体电镀方法，以适应这种应用。发明了“薄液膜法”和“喷雾旋涂法”，便于在8”圆盘的整个区域均匀地形成高质量的薄膜。2)为节省磁光盘生产中最佳的喷旋镀膜方法的实验人力，我们选择了反应溶液和氧化溶液的pH值，不需要使用无氧水。这为铁氧体镀磁光盘的批量生产提供了便利。3)为了降低磁光记录中的介质噪声，我们找到了表面光洁度好且尺寸小的薄膜的镀膜条件。通过使用洁净室和过滤器，薄膜质量进一步提高。加入右旋糖酐或蔗糖使薄膜的颗粒尺寸变小。4)通过选择Fe_<3-x> Co_xO_4中的x值，可以得到适合于固溶尖晶石镀膜中磁光盘的矫顽力。5)铁氧体镀膜与塑料基材（如丙烯酸酯和聚碳酸酯，用于磁光盘）的附着力可以通过将基材表面暴露在空气等离子体中来增强。

项目成果

T.Itoh,M.Abe,and Y.Tamaura: The Proceedings of ICM'88.

T.Itoh、M.Abe 和 Y.Tamaura：ICM88 会议记录。

後藤吉孝,浦裕,阿部正紀,五味学: 日本応用磁気学会誌. 7. (1987)

Yoshitaka Goto、Yutaka Ura、Masaki Abe、Manabu Gomi：日本应用磁学学会杂志 7。（1987 年）

玉浦裕,阿部正紀,伊藤友幸: 日本化学会誌. 1980-1987 (1987)

Yutaka Tamaura、Masaki Abe、Tomoyuki Ito：日本化学会杂志 1980-1987 (1987)。

M. Abe, Y. Tamaura, M. Oishi, T. Saitoh, T. Itoh and M. Gomi: "Plating of ferrite film on 8" disc by spray-spin coating method." IEEE Trans. Mag.MAG-23. 3736-3738 (1987)

M. Abe、Y. Tamaura、M. Oishi、T. Saitoh、T. Itoh 和 M. Gomi：“通过喷涂旋涂方法在 8” 盘上电镀铁氧体薄膜。” IEEE Trans. Mag.MAG-23。

T.Itoh,M.Abe,and Y.Tamaura: Japanese Journal of Apploed Physics.

T.Itoh、M.Abe 和 Y.Tamaura：日本应用物理学杂志。