Study on magnetic instability of GMR heads using quasi-static tester with laser heating function

Study on ESD/EMI Phenomena for Magnetic Reproducing Head

“…A number of problems related to electrostatic discharge phenomenon in GMR heads have been reported, including melting and diffusion caused by the Joule heating by ESD currents [1][2][3][4] , pinning rotation and demagnetization resulting from high magnetic field strength [5][6] , and dielectric breakdown induced by a high voltage [1][2][3][4] . Also, as in some previous work [7][8][9][10] , we also found that ESD current leads to head amplitude degradation and instability.…”

“…The major evaluation methods use ESD waveform such as the HBM, the MM, and the CDM. Many researchers have been implementing ESD studies of GMR head, such as its destruction mechanism by ESD waveform analysis [1][2][3][4][5][6][7][8][9][10] . The purpose of these studies was to better understand the signature of ESD events in order to assist in eliminating them from the manufacturing environment.…”