A method for reducing noise in a lapping guide. Selected portions of a Giant magnetoresistive device wafer are masked, thereby defining masked and unmasked regions of the wafer in which the unmasked regions include lapping guides. The wafer is bombarded with ions such that a Giant magnetoresistive effect of the unmasked regions is reduced. The GMR device is lapped, using the lapping guides to measure an extent of the lapping.

 
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< Head supporting mechanism including two load beams with ribs overlapped with each other

> GMR sensor having an under-layer treated with nitrogen for increased magnetoresistance

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