Shock analysis of MEMS actuator integrated with HGA for operational and non-operational HDD

In this paper, the effects of shock on MEMS microactuator integrated with Head Gimbal Assembly (HGA) for operational and non-operational HDD are studied. ANSYS/LS-DYNA is used for the finite element modeling and simulation. Shock responses are investigated at the height with the shock amplitude of 1000g and within the shock duration of 1ms. The preloaded state of the suspension is considered for the simulations. The operational HDD model uses linear springs to represent the air bearing stiffness of the head disk interface. The maximum stress is located at the corner of the flexure beam and center portion. A larger maximum stress is found for the nonoperational HDD model compared to the operational HDD model. This is due to the strong air bearing forces limiting slider motion.