Patent ID: 8065788
Filing Date: 2011-11-29
Classification: G11B,Y10T

Abstract:
1. A method for manufacturing a slider for perpendicular magnetic recording, comprising: providing a wafer; forming a read sensor on the wafer; forming a read sensor lapping guide, located relative to the read sensor; forming a write head on the wafer, the write head having a write pole with a flare point; forming a write head lapping guide, the lapping guide being formed by processes at least some of which are in common with processes used to form the write pole, the lapping guide having a feature that results in an abrupt change in resistance; cutting the wafer to form a quadrant of the wafer, the quadrant containing the read sensor, read sensor lapping guide, and write head lapping guide; connecting a testing measurement tool channel to both the read sensor lapping guide and the write head lapping guide, the channel being a single channel for measuring both the read sensor lapping guide and the write head lapping guide; performing a first lapping on a surface of the quadrant to define a stripe height of the read sensor while using the channel to monitor the resistance of both the read sensor lapping guide and write head lapping guide, and terminating the first lapping operation when a predetermined resistance is detected; and performing a second lapping while using the channel to monitor the resistance of the read sensor lapping guide and write head lapping guide, and terminating the second lapping when a sudden increase in resistance is detected.