Patent ID: 8889019
Filing Date: 2014-11-18
Classification: G11B,Y10T

Abstract:
1. A method for forming a read head, comprising: forming a sensor layer on a substrate; forming a first mask layer comprising a first material over the sensor layer; forming a bi-layer structure over a first portion of the first mask layer and leaving a second portion of the first mask layer exposed; forming a cap layer over the second portion of the first mask layer and the bi-layer structure; removing the bi-layer structure and a portion of the cap layer disposed over the bi-layer structure to expose the first portion of the first mask layer; forming a second mask layer comprising a second material over the first portion of the first mask layer and the cap layer; forming a third mask layer comprising a third material over the second mask layer; forming a fourth mask layer comprising a fourth material over the third mask layer; forming a photoresist mask over the fourth mask layer; and removing a portion of the fourth mask layer, the third mask layer, the second mask layer, and the first mask layer to form a hard mask stencil and to expose a portion of the sensor layer.