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헤드-디스크 인터페이스에 주입되는 입자의 영향에 대한 연구
한제희 ( Je Hee Han ),이래준 ( Rae Jun Lee ),김대은 ( Dae Eun Kim ),강태식 ( Tae Sik Kang ),조긍연 ( Keung Youn Cho ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
Particles in the HDD can cause serious damages such as scratches and thermal asperity(T A) at the head/disk interface(HDI). Accordingly, particles cause data loss including physical and electrical damages. To improve the reliability of head-disk interface, understanding the damage characteristics at the HDI due to particle interactions is required. The materials such as Ab03, TiC and aluminum were used in this experiment. The size and hardness of particles injected into the HDI are closely relevant to surface damage caused the data loss on the disk and head. In this paper, a variety of scratches were analyzed using scanning electron microscope(SEM) and atomic force microscope(AFM). In order to analyze defects of very small size on the disk, optical surface analyzer(OSA) was also used.
HDD에서 Smooth 디스크와 Texture 디스크가 HDI의 마찰대전에 미치는 영향
이대영 ( Dae Young Lee ),이래준 ( Rae Jun Lee ),강필선 ( Pil Sun Kang ),한제희 ( Je Hee Han ),황정호 ( Jung Ho Hwang ),김대은 ( Dae Eun Kim ),조긍연 ( Keung Youn Cho ),강태식 ( Tae Sik Kang ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
The tribocharge build-up in the slider disk interface can cause ESD (electrostatic discharge) damage. In turn, ESD can cause severe melting damage to MR or GMR heads. We investigated the tribovoltage/current build-up with smooth and textured disks in HDD, operating at increasing disk accelerations. We found that tribovoltage/current were generated during pico-slider/disk interaction and those levels were about 0.1 ~ 0.3 V and 10 - 40 pA, respectively. Tribovoltage/current were abruptly increased and dissipated within the acceleration time in the case of textured disk but in the case of smooth disk, tribovoltage was continuously increased until the end of uniform velocity region and the tribocurrent did not dissipate within the acceleration time. In the case of textured disk, tribovoltage/current was reduced with increasing disk acceleration, but in the case of smooth disk it was increased.