Effect of Molecular Structure of PFPE Lubricant on Interaction at HDI in Near-Contact Operation

Sakane, Y.; Wakabayashi, A.; Li, L.; Kasai, P.H.

doi:10.1109/tmag.2006.878627

Cited by 9 publications

(1 citation statement)

References 3 publications

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“…Mono effectively reduced the head-disk adhesive interaction during near-contact operations. (Sakae et al, 2003) Sometimes the additives, such as X1-P, are used to enhance the reliability. (Jiaa& Liu, 1999) The linear or branched PEPE physically deposited on the diamond-like carbon surface with a covalent linkage formed by thermal decomposition of the peroxide improves the stability.…”

Section: Demand For Lubricant Of Thin Film Magnetic Mediamentioning

confidence: 99%

Applications of Ionic Liquids in Science and Technology

Handy¹

2011

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Dr. Scott Handy received his Ph.D. in Chemistry from Indiana University in 1996 under the direction of Professor Paul Grieco. Following an NIH postdoctoral fellowship at Stanford University in the labs of Professor Paul Wender, he joined the Chemistry Department at Binghamton University in 1999. In 2006 he moved to Middle Tennessee State University as an Associate Professor and was promoted to Professor in 2011. His research interests are in the areas of cross-coupling reactions (particularly regioselectivity in the couplings of polyhaloheteroaromatics) and ionic liquids (as recyclable solvents for transition metal-catalyzed reactions and electrochemistry).

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Section: Demand For Lubricant Of Thin Film Magnetic Mediamentioning

confidence: 99%

Applications of Ionic Liquids in Science and Technology

Handy¹

2011

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Fluorine-ion-implanted air-bearing surface for low-friction head–disk interface

Shimizu

Umehara

2009

Microsyst Technol

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With the aim of reducing the lubricant-slider interaction by reducing slider surface energy, we fabricated several types of sliders with fluorine-ion-implanted (FII) air-bearing surfaces by using different levels of acceleration voltage for FII. With a low acceleration voltage, the fluorine-ions tended to be concentrated at shallower depths from the slider surface, and the contact angle of the water droplets was greater. The FII-treated slider showed lower touch-down height, which implies an improvement of slider stability at near-contact regime. The polar force component of the surface energy of FII-treated slider surface showed a good correlation with a thermally flying-height control heater power at touch-down. It is estimated that FII-treatment can reduce the polar force component of the surface energy and reduce the slider-lubricant interaction, resulting in a reduction of slider touch-down height.

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Humidity effect on head-disk clearance

Aoki

Takahashi

et al. 2011

Microsyst Technol

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The mechanism of head-disk-clearance change due to a humidity effect was investigated experimentally. The head-disk clearance was measured by moving the head elements towards the disk by thermal flying-height-control technology until the head touched the disk while monitoring them with an acoustic-emission sensor in an environmentally controlled component tester. Measured clearance change from 3% RH to 80% RH reached about -0.6 nm at 25°C and about -1.6 nm at 60°C. Head-disk clearance change caused by humidity was classified as the slider-flying-height change and disk-touch-down-height (TDH) change to clarify the mechanism of the clearance change. Slider FH change was dominated by absolute humidity rather than relative humidity. On the other hand, the humidity effect on disk TDH change was classified as a ''water-film effect'' and a ''lubricant-mogul effect'', which both depend on relative humidity. Both effects caused clearance change of about 0.4 nm for lubricant A, which is a lubricant with two hydroxyl functional groups at the end of the main chain. These effects were assumed to be caused by water adsorption onto the surface of lubricant. Reduction of the number of free hydroxyl groups which attract water molecules could suppress the disk TDH change related to the humidity effect.

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Effect of Molecular Structure of PFPE Lubricant on Interaction at HDI in Near-Contact Operation

Cited by 9 publications

References 3 publications

Applications of Ionic Liquids in Science and Technology

Applications of Ionic Liquids in Science and Technology

Fluorine-ion-implanted air-bearing surface for low-friction head–disk interface

Humidity effect on head-disk clearance

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