Lubricant Design for In-Contact HDI Systems

In-conatct recording systems are expected for magnetic disk derives with an ultra-high recording density. Design concept of lubricant systems for the in-contact systems is much different from that for flying HDI systems. Other than wear performances, lubricants with high surface energies suppressed the bouncing of contact sliders. Specifically, the bouncing height of 3nm was obtained by the combination of 30% contact sliders and MPBT lubricants. It was found that wear performance of MPBT was ten times larger than that of PFPE diol lubricant.