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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.
하드 디스크 드라이브에서 Smooth 디스크와 LZT 디스크가 입자 발생에 미치는 영향
이대영 ( Dae Young Lee ),허선영 ( Sun Young Huh ),강필선 ( Pil Sun Kang ),황정호 ( Jung Ho Hwang ),조긍연 ( Keung Young Cho ),강태식 ( Tae Sik Kang ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
The head to disk spacing must be decreased to increase recording densities in hard disk drives. Recently, to decrease the head to disk spacing, smooth disk having no bumps onto the lading zone has used. In this research, we compared the number of particles generated in HDD with smooth and textured disks. We used a sampling method using a particle sampler and a epe (condensation particle counter) to detect particles in HDD. First, we sampled and counted particles generated with disk rotational speed and various rest times when the smooth disk and textured disks were used, then analyzed the sampled particles by SEM (scanning electron microscopy) and AES (auger electron spectroscopy). In results of measuring particles, more particles in case of LZT disk drive generated than that of the smooth disk drive in all test modes. The number of particles generated in the smooth disk was very low. The particle generation increased as the rest time increased (smooth/LZT disks) and more particles in case of LZT disk drive generated than that of the smooth disk drive. In results of analyzing particle components, AI, Ti, Si components were detected and we could not found differences between components in case of smooth/LZT disk drive.