Browse > Article
http://dx.doi.org/10.5050/KSNVN.2009.19.6.614

Design of Spindle Motor-chuck System for Ultra High Resolution  

Kim, Kyung-Ho (삼성전자 반도체총괄)
Kim, Ha-Yong (삼성전자 반도체총괄)
Shin, Bu-Hyun (서강대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.19, no.6, 2009 , pp. 614-619 More about this Journal
Abstract
The STW(servo track writing) system which is the process of writing servo signals on disks before assembling in drives uses the spindle motor-chuck mechanism to realize low cost because the spindle motor-chuck mechanism has merit which can simultaneously write multi-disk by piling up disks in hub. Therefore, when the spindle motor-chuck mechanism of horizontal type operates in high rotation speed it is necessary to reduce the effect of RRO(repeatable run-out) and NRRO(non-repeatable run-out) to achieve the high precision accuracy of nano-meter level during the STW process. In this paper, we analyzed that the slip in assembly surfaces can be caused by the mechanical tolerance and clamping force in hub-chuck mechanism and can affect NRRO performance. We designed springs for centering and clamping considering centrifugal force by the rotation speed and assembly condition. The experimental result showed NRRO performance improves about 30 % than case of weak clamping force. The result shows that the optimal design of the spindle motor-chuck mechanism can effectively reduce the effect of NRRO and RRO in STW process.
Keywords
Spindle Motor-chuck System; NRRO; RRO; Nano Resolution; Spindle Motor; Clamping; Centering; STW;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Thum, C. K., Du, C., Zhang, J., Tan, K. P. and Chen, B. M., 2008, “Servo Control Design for a High TPI Servo Track Writer with Microactuators,” IEEE Transactions on Magnetics, Vol. 44, No. 9, pp. 2227-2234   DOI   ScienceOn
2 Takahiro, I., Makoto H., Yousuke S. and Shizuo, Y., 2001, “Improvement of RRO Using Hybrid-type STW for Hard Disk Drives,” IEEE Transactions on Magnetics, Vol. 37, No. 2, pp. 969-973   DOI   ScienceOn
3 Han, Y. S., Kim, C. S. and Kang, S. W., 2004, “Repeatable Run-out Reduction by Servo Track Writing in Semi-vacuum Condition for Ultra-high TPI Disk Drive,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 14, No. 11, pp. 1176-1181   DOI   ScienceOn
4 Yamada, T., Fukushi, M., Suzuki, H. and Takaishi, K., 2006, “Servo Track Writing Technology,” Fujitsu Sci. Tech. J., Vol. 42, No. 1, pp. 93-102
5 Kohki, N. and Masahiko, N., 1997, “Novel NRRO Minimization Algorithm for an Ultrahigh-density Servo Track Writer,” IEEE Tran sactions on Magnetics, Vol. 33, No. 5, pp. 2626-2628   DOI   ScienceOn