Method to convert and calibrate the embedded contact sensor signal to clearance and spacing information using interface voltage control

摘要

Embodiments of the present invention generally relate to a method for obtaining head/disk clearance based on ECS signal. The ECS is calibrated by applying different interface voltages to cause changes in the head/disk clearance, the ECS signal at each interface voltage is obtained, and the relationship between the change in head/disk clearance and the ECS signal is calculated. From this relationship, the head/disk clearance may be obtained based on ECS signal.

主权项

1. A method for calibrating and utilizing an embedded contact sensor, comprising:
applying a plurality of interface voltages to cause a plurality of changes in a head/disk clearance; calculating each of the plurality of changes in the head/disk clearance, wherein a relationship of the plurality of changes in the head/disk clearance to the interface voltage forms a quadratic fit; obtaining an embedded contact sensor signal at each of the plurality of interface voltages, wherein a relationship of the embedded contact sensor signal to each of the plurality of interface voltages forms a quadratic fit; and calculating a relationship between the change in the head/disk clearance and the embedded contact sensor signal, wherein the relationship of the change in the head/disk clearance to the embedded contact sensor signal is linear.