Air Bearing Simulation of Discrete Track Recording Media

Measurement of spreading characteristics of molecularly thin lubricant films over grooved solid surfaces based on diffraction simulations

“…On the other hand, discrete track recording (DTR) media which are most promising to improve the recording density of HDDs are being intensively studied. There are reports on the manufacturing techniques , air bearing simulations (Duwensee et al 2006), and numerical and experimental performance evaluations (Peng et al 2006) of DTR media that bear grooved structures several to 55 nm in depth and 100-500 nm in width. However, spreading characteristics of lubricant films on such grooved surfaces remain an untouched subject.…”

Numerical Simulation of the Head/Disk Interface for Patterned Media

“…The air bearing pressure distribution and equilibrium position are obtained by a finite element solution of the steady state Reynolds equation [3,16] given by:…”

“…Island-like cylindrical structures on the disk surface in the radial and circumferential directions change the air bearing pressure contours of the head/disk interface compared to a conventional head/disk interface with a ''smooth'' disk. Duwensee et al [3] studied the influence of discrete track pattern on pressure generation in slider bearings. They reported that very high and localized air bearing pressure peaks occur in discrete track head/disk interfaces, and that the slider pitch angle was independent of the DTR parameters.…”

Tribological testing of sliders on discrete track media and verification with numerical predictions

“…Patterned media head/disk interfaces are challenging from a tribology point of view (Suzuki et al 2007), since discrete tracks or bits influence the head/disk interface dynamics and thereby the interface reliability. Very high and localized air bearing pressure peaks are predicted from numerical simulations of discrete track head/disk interfaces (Duwensee et al 2006a). Increased air bearing pressure is likely to cause lubricant depletion.…”