Method of lapping MR. sensors

Details Method of lapping MR. sensors Method of lapping MR. sensors

1994-02-07

1995-11-07

Hughes, S. Thomas

Metal working

Method of mechanical manufacture

Electrical device making

29407, 451 1, 451 9, G11B 5127

Patent

active

054638054

ABSTRACT:
A system for lapping a magnetoresistive (MR) sensor on a slider to a proper height is disclosed. The system comprises simultaneously lapping the MR lap monitor and the MR sensor positioned on the slider until a resistance of a variable resistor located within the MR lap monitor is approximately equal to a resistance of a target resistor located within the MR lap monitor. During the lapping process, a reference resistor located within the lap monitor is compared to both the variable and target resistors to prevent a lapping failure. In one preferred embodiment, the reference, target, and variable resistors are formed from a ferromagnetic metal alloy. The MR lap monitor and the MR sensor are lapped until a height of the ferromagnetic metal alloy forming the variable resistor is approximately equal to a height of the ferromagnetic metal alloy forming the target resistor.

REFERENCES:
patent: 4457114 (1984-07-01), Hennenfent et al.
patent: 4477968 (1984-10-01), Kracke et al.
patent: 4536992 (1985-08-01), Hennenfent et al.
patent: 4689877 (1987-09-01), Church
patent: 4841625 (1989-06-01), Valstyn
patent: 4861398 (1989-08-01), Fukuoka et al.
patent: 5065483 (1991-11-01), Zammit
patent: 5210667 (1993-05-01), Zammit
patent: 5361547 (1994-11-01), Church et al.

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