Patent ID: 8780507
Filing Date: 2014-07-15
Classification: B82Y,G01R,G11B,H01L

Abstract:
1. A transducer, comprising: a first ferromagnetic layer; a second ferromagnetic layer; an electrically conductive layer positioned between the ferromagnetic layers; wherein a length of the first ferromagnetic layer in a first direction parallel to a plane of deposition thereof is greater than a length of the electrically conductive layer in the first direction such that a first end of the first ferromagnetic layer extends beyond an end of the electrically conductive layer in the first direction, wherein an electrical current enters or exits only the first end of the first ferromagnetic layer that extends beyond the end of the electrically conductive layer in the first direction, wherein a length of the second ferromagnetic layer in a second direction parallel to a plane of deposition thereof is greater than a length of the electrically conductive layer in the second direction such that a first end of the second ferromagnetic layer extends beyond an end of the electrically conductive layer in the second direction, wherein the electrical current enters or exits only an edge of the first end of the second ferromagnetic layer that faces away from the air bearing surface of the transducer, and wherein an extent that the first end of the first ferromagnetic layer extends beyond the electrically conductive layer is greater than an extent that the first end of the second ferromagnetic layer extends beyond the electrically conductive layer.