公开(公告)号：SG47371A1

公开(公告)日：1998-04-17

申请号：SG1995002268

申请日：1994-10-25

Applicant: IBM

Inventor： BARLOW IRMELA CHRISTIANE ,  GARFUNKEL GLEN ADAM ,  HOYT ROGER F ,  MARELLO VINCENT ,  MCWILLIAMS CHRISTIAN JR ,  WALLASH ALBERT JOHN

IPC: G11B5/02 ,  G11B5/31 ,  G11B5/39 ,  G11B5/40

Abstract: Electrically conductive protective devices provide a current path shunting the magnetoresistive (MR) sensor element (35) in a magnetic head assembly (21) to discharge static electrical charges without damage to the MR sensor element. A variable conductance device (80) having a nonlinear current-voltage characteristic, such as a pair of Schottky diodes, for example, is connected between the MR sensor element leads in parallel with the MR sensor element or between each MR sensor element lead and a ground reference, the MR sensor element magnetic shields, for example, to provide a discharge current bypass path. Alternatively, one or more bleed resistors (133) are connected between the MR sensor element leads and a ground reference to provide the current bypass path thus allowing any static charge to bleed off.