| 摘要 |
PROBLEM TO BE SOLVED: To provide a CPP read head structure which is balanced in parasitic capacitance. SOLUTION: A current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) read head structure has the MR read head 100 located between first and second shields (S 1, S 2) on a substrate with a shunt resistor R 1 connecting S 1 to the substrate and a shunt resistor R 2 connecting S 2 to the substrate, with R 1 and R 2 being approximately equal. Because R 1 and R 2 are close enough in value there is no significant interference pickup in the low frequency region. The shunt resistors can be formed from high-resistivity metal nitrides or cermets. The spacing between the substrate and S 1 may be selected to make the capacitance between S 1 and the substrate approximately equal to the capacitance between S 2 and the substrate to substantially reduce interference pickup in the high frequency region. Equalization conductors (EC 1, EC 2) may be connected to the substrate and spaced from S 2 and S 1, respectively, by electrically insulating material to create additional capacitances with values selected to substantially equalize the total parasitic capacitance on S 2 with the total parasitic capacitance on S 1. COPYRIGHT: (C)2008,JPO&INPIT
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