Edge finishing process for glass or ceramic disks used in disk drive data storage devices

用在盘驱动器数据存储设备中的玻璃或陶瓷盘的周向边缘优选地通过塑性磨削被精整，以产生一基本无裂痕的表面，该表面是未经化学加强的。优选地，材料为玻璃，盘的内边缘和外边缘都经过精整。边缘精整优选地按两步的工艺完成，包括粗磨和塑性磨削，采用用于砂轮和工件的高速旋转的空气轴承主轴。优选地，使砂轮形成为能在周向边缘与平的盘表面的接合处形成一圆角。 The circumferential edges of glass or ceramic disks used in disk drive data storage devices are preferably finished by ductile grinding to produce an essentially fracture-free surface, which is not chemically strengthened. Preferably, the material is glass, and both the inner and outer edges of the disk are finished. Edge finishing is preferably achieved in a two-stage process, involving a coarse grind and a ductile grind, using air bearing spindles rotated at high speed for grinding wheels and workpiece. Preferably, the grinding wheels are shaped to provide a radius at the juncture of the circumferential edges and flat disk surfaces.