Investigation of electrostatically tunable adhesion and instability of flying head slider

Abstract The interfacial adhesion between microstructures is inevitable in a micro-electro-mechanical system (e.g., hard disk drive (HDD)), which may lead to complicated microtribodynamics problems. This research has investigated the effect of surface potential on and head–disk interface (HDI) an HDD. A dynamic continuum force model, where electrowetting considered, proposed evaluate interaction, then employed into two-degree-of-freedom (2DOF) model theoretically analyze influence mechanism microtribodynamics. results confirm that elimination can effectively repress retention, further proved by measured slider response with laser Doppler vibrometer (LDV). Moreover, adhesion-induced instability also analyzed through phase portrait. It tells critical stable flying height be lowered potential.