Patent ID: 7154713
Filing Date: 2006-12-26
Classification: B82Y,G11B

Abstract:
1. A magnetic head comprising a lower shield layer, an upper shield layer, a magnetoresistive film formed between the upper shield layer and the lower shield layer and comprising at least a first ferromagnetic layer, intermediate layer and second ferromagnetic layer, a lower gap layer formed between the lower shield layer and the magnetoresistive film, and an upper gap layer formed between the upper shield layer and the magnetoresistive film, and having detection means for detecting a resistance change produced from the magnetoresistive film by a variation in external magnetic field when a sensing current is applied in a direction substantially perpendicular to the interface between the first ferromagnetic layer and the intermediate layer and the interface between the intermediate layer and the second ferromagnetic layer, wherein at least one of the upper shield layer and the lower shield layer is a laminate consisting of three or more layers including a deformation prevention layer and a soft magnetic layer.