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1. 发明授权

US4853810A Method and apparatus for controlling the flying height of the head in a magnetic storage unit 失效
标题翻译：用于控制磁存储单元中磁头的飞行高度的方法和装置
公开(公告)号：US4853810A
公开(公告)日：1989-08-01
申请号：US124137
申请日：1987-11-23
申请人： Wolfgang D. Pohl , James K. Gimzewski , Paul R. Muralt
发明人： Wolfgang D. Pohl , James K. Gimzewski , Paul R. Muralt
IPC分类号： G11B5/60 , G11B21/21
CPC分类号： G11B5/6005
摘要： The method involves the steps of moving the magnetic head (8) to within aerodynamic distance from the electrically conductive surface (16) of rotating magnetic recording disk, further positioning of the head (8) until a tunnel current occurs across the gap between the head (8) and surface (16), and maintaining said tunnel current constant by using the deviations of the current from a predetermined value corresponding to a certain flying height.The apparatus comprises a tunnel electrode (9) forming an integral part of the head assembly which is attached to a distance control mechanism (5) permitting the positioning of the head assembly with a one-nanometer accuracy. The tunnel electrode (9) has a very slightly beveled shoulder (45, 47) ensuring early detection of asperities approaching the head. Gradation of the potential between tunnel electrode (9) and surface (16) of the recording disk (3) is used to enhance the response to asperities.
摘要翻译：该方法包括以下步骤：将磁头（8）移动到与旋转的磁记录盘的导电表面（16）的空气动力学距离内，头部（8）的进一步定位直到在头部之间的间隙（8）和表面（16），并且通过使用电流与对应于一定飞行高度的预定值的偏差来保持所述隧道电流恒定。该装置包括形成头部组件的整体部分的隧道电极（9），其连接到距离控制机构（5），允许以一纳米精度定位头部组件。隧道电极（9）具有非常轻微的倾斜的肩部（45,47），以确保早期发现接近头部的凹凸。隧道电极（9）与记录盘（3）的表面（16）之间的电位梯度被用于增强对粗糙度的响应。

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