Lubricant distribution and its effect on slider air bearing performance over bit patterned media disk of disk drives

2011 ◽  
Vol 109 (7) ◽  
pp. 074511 ◽  
Author(s):  
Lin Wu
Keyword(s):  
Air Bearing ◽  
Disk Drives ◽  
Bit Patterned Media ◽  
Patterned Media ◽  
Slider Air Bearing ◽  
Lubricant Distribution

Air Bearing Simulation for Bit Patterned Media

2009 ◽  
Vol 33 (3) ◽  
pp. 199-204 ◽  
Author(s):  
Hui Li ◽  
Hao Zheng ◽  
Yeoungchin Yoon ◽  
Frank E. Talke
Keyword(s):  
Air Bearing ◽  
Bit Patterned Media ◽  
Patterned Media

A Model of Slider/Disk Interface Wear for Proximity Recording

1996 ◽  
Vol 118 (4) ◽  
pp. 813-818 ◽  
Author(s):  
Yufeng Li ◽  
Aric Menon
Keyword(s):  
Material Properties ◽  
Hard Disk Drives ◽  
Air Bearing ◽  
Disk Drives ◽  
Carbon Overcoat ◽  
Interface Evolution ◽  
Disk Interface ◽  
Recording Process ◽  
Surface Topographies ◽  
Slider Air Bearing

Slider/disk interface wear is inevitable for ultra-low flying hard disk drives and is the central issue for proximity recording. While disk wear has been addressed in the literature, slider wear has been largely considered to be trivial and is ignored. However, with the improvement of disk overcoat and introduction of diamond-like-carbon overcoat on slider air bearing surface, the surface hardnesses of the slider and disk are approaching each other and, therefore, the slider surface wear becomes significant or, in some conditions, even dominant. In this study, a theoretical model is developed for semi-steady-state slider/disk interface evolution of proximity recording which takes account of both the disk and slider wear. It includes the effects of the air bearing characteristics, pitch stiffness, material properties, and surface topography of both the slider and disk. Numerical results are illustrated for typical proximity recording interface, where the evolutions of the slider, disk, contact force, and pitch angle are evaluated for various air bearing stiffnesses, material properties, and surface topographies. This model is intended to provide some fundamental understanding of the slider/disk interface evolution during proximity recording process.

Air bearing dynamic stability on bit patterned media disks

2013 ◽  
Vol 19 (9-10) ◽  
pp. 1401-1406 ◽  
Author(s):  
Liping Li ◽  
David B. Bogy
Keyword(s):  
Dynamic Stability ◽  
Air Bearing ◽  
Bit Patterned Media ◽  
Patterned Media

Air Bearing Simulation for Bit Patterned Media

2008 ◽  
Author(s):  
Hui Li ◽  
Hao Zheng ◽  
Yeoungchin Yoon ◽  
Frank E. Talke
Keyword(s):  
Thermal Stability ◽  
Steady State ◽  
Disk Surface ◽  
Hard Disks ◽  
Air Bearing ◽  
Bit Patterned Media ◽  
Patterned Media ◽  
Storage Density ◽  
Low Head ◽  
Disk Spacing

Patterned media is being considered as a means for achieving a storage density beyond 1Tb/in2 on hard disks by reducing cross talk and overcoming thermal stability problems. In this investigation, the flying characteristics of a femto-type slider over bit patterned media (BPM) is investigated. The discrete bits of the disk are modeled as cylindrical protrusions on the disk surface. The steady-state flying characteristics over BPM at ultra-low head disk spacing is simulated.

Meniscus Adhesion at Ultra-Low Flying Slider-Disk Interfaces

2005 ◽  
Author(s):  
C. Mathew Mate ◽  
Robert N. Payne ◽  
Peter Baumgart ◽  
Kathy Kuboi
Keyword(s):  
Experimental Evidence ◽  
Van Der Waals ◽  
Adhesive Force ◽  
Air Bearing ◽  
Disk Drives ◽  
Bearing Surface ◽  
Slider Air Bearing ◽  
Adhesive Forces

As head-disk spacings in disk drives approach a few nanometers, adhesive forces between the slider and disk can drastically alter the slider flying dynamics. At these small separations, it is still unclear, however, what type of adhesive force dominates. Most previous studies have concentrated on van der Waals and electrostatic attractive forces [1], which are readily incorporated into air bearing simulations. In this talk, we provide experimental evidence that the dominant adhesive force originates from menisci forming around the low flying portions of the slider air-bearing-surface as the spacing transitions from near-contact to contact.

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