100kTPI급 하드 디스크 드라이브 TMR 설계를 위한 SUSPENSION에 관한 연구

A TMR Budget Design for 100kTPI Hard Disk Drives Using a Head Gimbal Assembly with Radial Motion Capability

In high-capacity disk drives with ever-growing track density, the allowable level of position error signal (PES) is becoming smaller and smaller. A substantial portion of the PES is caused by disk vibration. This can be reduced by using a head gimbal assemblies (HGAs) that do not confine the slider movement to the vertical direction to disks, but allow movement to the radial direction of disks with respect to disk vibration. Several types of HGAs are proposed for such radial motion of the slider. Experimental results show that the PES levels are reduced by the proposed HGA-design concepts.