A study of ESD sensitivities of bottom-synthetic recording heads

This paper summarizes the behaviors of Bottom-Synthetic Spin-Valve recordin g heads in the spin-stand Magnetic test and Quasi-Static test when the head s were subjected to simulated Human-Body Model events. Magnetic test includ es the parametric, bit-error-rate and micro-track profile tests, It was dem onstrated that the ESD sensitivity is dependent on the structural volume. T he single peak of micro-track profile changed to double or triple peaks, an d the bit-error rate degraded only when the ESD energy was sufficiently lar ge. Compared with all other parameters, the peak-to-peak amplitude in Quasi -Static test and the track-average-amplitude in Magnetic test are the most sensitive to ESD events.