고밀도 HDD용 Write Head 최적화 설계에 관한 연구

Abstract

Hard Disk Drive(HDD) is widely used as a storage system in PC and other information devices. Although another storage devices such as optical devices(ex CD R/W, MODD etc.) and flash memory are developed, recording density and access time of such devices are yet under developing. The main advantages of the HDD is rapidly growing density and fast access of the data.

At this time, the growing of the recording density of HDD depends on the write head. To achieve high recording densities, the size of recording head should be small so that the magnetic field of the recording head is focused at the small region

In this thesis, magnetic fields of the recording heads are analyzed by three dimensional nonlinear finite element method. Optimum design scheme for highly focused recording head has been developed and head for 100Gb/in² has been designed.

In addition, the method to achieve high data rate has been presented using eddy current analysis with flux damping.