ESD effect of deshunting sequences to recording heads using human body model

The electrostatic discharge (ESD) effect in recording heads in the process of deshunting is studied using human body model (HBM). The sequence of deshunting is thought to cause the damage of a gap between the GMR head sensor and the bottom shield. It is found from the simulation, based on real values, that a typical deshunting sequence as W- to R- can destroy the gap unless a completed protection is used. In a case of all four leads are deshunted, the less damage can be observed.

[1]  A. Wallash,et al.  Magnetic changes in GMR heads caused by electrostatic discharge , 1998 .

[2]  L.-Y. Zhu.  ESD prevention on an unshunted MR head , 1998, Electrical Overstress/ Electrostatic Discharge Symposium Proceedings. 1998 (Cat. No.98TH8347).

[3]  A. J. Wallash.  Field-induced charged device model testing of magnetoresistive recording heads , 1996, 1996 Proceedings Electrical Overstress/Electrostatic Discharge Symposium.

[4]  Apirat Siritaratiwat,et al.  ESD effect in GMR heads in the trim shunt tab process , 2001, Proceedings of the 2001 8th International Symposium on the Physical and Failure Analysis of Integrated Circuits. IPFA 2001 (Cat. No.01TH8548).