公开(公告)号：US4869090A

公开(公告)日：1989-09-26

申请号：US266705

申请日：1988-11-03

申请人： Masuo Tada ,  Kazuhiko Akamatsu ,  Takaaki Fukumoto ,  Toshiaki Ohmori ,  Tadashi Hyono

发明人： Masuo Tada ,  Kazuhiko Akamatsu ,  Takaaki Fukumoto ,  Toshiaki Ohmori ,  Tadashi Hyono

IPC分类号： F25C1/00 ,  G11B5/73 ,  G11B5/84

CPC分类号： G11B5/84 ,  F25C1/00

摘要： A method for forming a fine unevenness over a surface of a base plate (9) for a magnetic disc comprises the step of bombarding the surface of the base plate (9) with a jet of gas mixed with fine ice particles (4) that are formed by mixing a flow of fine pure water droplets from a spray (2) and a counter directed flow of nitrogen gas cooled by being bubbled through a quantity of liquid nitrogen held in a reservoir (6). The obtained unevenness can be controlled by varying the size of the ice particles, the jet pressure, the distance between the jet nozzle providing the size of the ice particle jet and the receiving surface of base plate (9), the duration of spraying and the spraying angle with respect to the base plate.

摘要翻译： 在用于磁盘的基板（9）的表面上形成微细凹凸的方法包括用与微细冰颗粒（4）混合的气体射流轰击基板（9）的表面的步骤， 通过混合来自喷雾（2）的细的纯水滴流和通过鼓泡通过保持在储存器（6）中的一定量的液氮而冷却的逆向氮气流。 可以通过改变冰颗粒的尺寸，喷射压力，提供冰颗粒射流的尺寸的喷嘴与基板（9）的接收表面之间的距离，喷涂的持续时间和 相对于基板喷射角度。