Alignment of magnetic poles of thin film transducer

摘要

A process for producing a thin film magnetic head uses the upper magnetic pole (P2) as a self-aligning mask for partially trimming the lower magnetic pole (P1), wherein the yoke and pole tip regions to be trimmed are processed by separate and distinct photolithographic steps, thereby achieving noncritical alignment in the yoke area, while maintaining critical alignment in the pole tip region which includes the transducing gap.