Stiction improvement for sub-microinch glide height media using small crater laser bumps

Lin, Chih-Ming; Fan, C.C.; Lin, J.S.; Huang, None Ward; Wang, C.M.; Dong, Chunfa

doi:10.1109/20.800849

Cited by 1 publication

(2 citation statements)

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“…By scanning the beam along the lateral direction, elliptical bumps consisting of a peak on one side and a valley on the other have been textured on the disk surface. Several studies have acknowledged how this asymmetrical bump having an elliptical contact area shows good wear durability, faster take-off/landing response and lower glide resonance and stiction than the symmetrical circular crater shape [10,[13][14][15][16][17]. All the aforementioned conditions are critical for ultra-low-flying HDIs.…”

Section: Introductionmentioning

confidence: 99%

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Laser generation of elliptical nanometre and sub-nanometre bump arrays on NiP/Al data storage disks and their effect on stiction performance

Peña

Wang

J³

et al. 2011

Nanotechnology

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Elliptical nano-bumps on nickel-phosphorus coated aluminium (NiP/Al) hard disks were fabricated by a laser texturing system (maximum power 8 W, maximum frequency 300 kHz). By carefully selecting the level of laser power attenuation and defocus offset distance, bump height can be controlled below 6 nm and down to the sub-nanometre scale. This type of laser-induced texture (elliptical shape) on a disk surface is expected to provide better control of the stiction force along with the smallest separation distance between the head slider and the disk. Quantitative modelling based on the classical Hertzian theory for elliptic contacts has been carried out with the purpose of predicting the stiction behaviour of the presented elliptical shaped sub-10 nm bumps. It has been found that an elliptical shape not only reduces the overall stiction performance of the laser texturing zone (LZT) compared to the conventional circular shape but also extends the occurrence of the 'stiction wall' towards the sub-10 nm regime for ultra-low-glide applications.

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Section: Introductionmentioning

confidence: 99%

“…Hard disk laser texturing at the nanometre scale has been successfully demonstrated by various authors [1,7,[9][10][11][12]. Nevertheless, a particular type of nano-bump with an asymmetric profile has also been generated on a NiP/Al substrate.…”

Section: Introductionmentioning

confidence: 99%